Index      Introduction      Structure      Countryprofiles      Topics      Links      Comments     


(Updated 2011)


1.1 Country overview

1.1.1 Governmental System

Spain is a constitutional democracy in which the Head of State is the King. Executive power is vested in the President of the government. According to the Constitution, which was adopted in 1978, political power in Spain is organized as a central government with devolved powers for 17 autonomous communities. There are also 2 autonomous cities.

1.1.2 Geography and Climate

Spain is situated in south west Europe, occupying the greater part of the Iberian Peninsula, the Balearic and Canary Islands and a small part of northern Africa (Ceuta and Melilla), and bounded on the north by the Bay of Biscay, France and Andorra; on the east by the Mediterranean Sea; on the south by the Mediterranean Sea and the Atlantic Ocean; and on the west by Portugal and the Atlantic Ocean. The area of Spain is 505,990 km2 large.

The climate of Spain is marked by extreme temperatures and, generally, insufficient rainfall. The variegated physical features of the country ensure pronounced climatic differences. The climate is most equable along the Cantabric and Atlantic coasts, which are generally damp and mild. The central plateau is dry and hot. Most of Spain receives less than 610 mm of precipitation per year, the northern mountains get considerable more moisture. By contrast, the southern Mediterranean coast has a subtropical climate. The average precipitation in Spain is 627 mm.

1.1.3 Population

The historical population data are given in Table 1. The population in Spain in 2009 was about 46,74 million people; the overall density was 92,38 persons per km2. Spain is increasingly urbanizing with more than three-fourths of the population in towns and cities.


Average annual growth rate (%)
19701980 19902000 20082009 2000 to 2009
Population (millions)33.837.539.340.846.1546.74 1.62
Population density (inhabitants/km²)66.974.477.980.791.2292.38 1.61
Urban Population as % of total66.4973.2175.5176.0578.6178.85 0.31
Area (1000 km²) 505.9

Source: Statistical Yearbooks (several years). See web INE.

1.1.4 Economic Data

In general terms, the Gross Domestic Product (GDP) has risen since the early 90’s due to an increase in the service sector. In 2009, GDP was 1.051,151 million euros. Table 2 shows the historical GDP statistics in US$.


Average annual growth rate (%)
19801990 20002005 20082009 2000 to 2009
GDP (millions of current US$)2224.495520.709582.3771,132.1321,601.4081,467.88910.82
GDP (millions of constant 2000 US$)//582.377////
GDP per capita (PPP* US$/capita)7,280.83714,193.39422,349.06327,508.77130,858.35729,625.481(***)3.18
GDP per capita (current US$/capita)6,004.77513,407.89014,464.32026,305.40035,364.44032,030.4409.23

(***) Estimated

*PPP: Purchasing Power Parity


1.2 Energy Information

1.2.1 Estimated available energy

The main indigenous energy sources in Spain are coal and hydro (Table 3).


Estimated available energy sources
Fossil FuelsNuclear Renewables
Total amount in specific units*
Total amount in Exajoule (EJ) 10.400.083.6613.3 

* Solid, Liquid: Million tons; Gas: Billion m3; Uranium: Metric tons; Hydro, Renewable: TW

Source: IAEA Energy and Economic Database (EEDB).

1.2.2 Energy Statistics

In 2009, the primary energy consumption in Spain reached 130.5 Mtoe, which represented a decreased of 8.3% in relation to the precedent year, in line with the decrease initiated in the second semester of 2008, due to the international crisis context.

The final energy consumption decreased about 7.4% in the same year, reaching 97,776 ktoe, due to the decrease in the economical activity of all sectors (specially industry and transport), as well as mild climate conditions.

The national energy production in the same year was about 29.9 Mtoe, which represented a decrease of 2.8% in relation to 2008. Increases in renewables have not compensated the decrease of nuclear and fossil fuels.

Table 4 shows the historical energy statistics.


Average annual growth rate (%)
19701980 19902000 20082009 2000 to 2009
Energy consumption (EJ)
- Total 1.733.033.715.416.025.510.20
- Solids***0.470.560.851.200.590.43-10.67
- Liquids1.002.071.882.572.862.670.44
- Gases0.080.230.721.461.316.84
- Nuclear0.650.58
- Hydro0.080.09
- Other Renewables0.380.42
- Primary electricity ****0.260.320.750.921.111.091.90
Energy production (EJ)
- Total 0.660.851.401.531.3011.255-2.18
- Solids***0.370.450.540.570.180.16-13.25
- Liquids0.
- Gases0.060.020.0010.001-33.57
- Nuclear0.650.58
- Hydro0.080.09
- Other Renewables0.380.42
- Primary electricity ****0.280.330.750.921.111.091.90
Net import (Import - Export) (EJ)
- Total 1.222.342.544.295.174.711.04
- Solids***
- Liquids1.
- Gases0.080.170.721.631.498.41
- Nuclear
- Hydro
- Other Renewables

* Latest available data

** Energy consumption = Primary energy consumption + Net import (Import - Export) of secondary energy.

*** Solid fuels include coal, lignite and commercial wood

**** Primary electricity = Nuclear + Hydro + Other Renewables (for old data)

Source: Libro de la Energía 2009 (tables 2.2.1, 2.3.2, 5.1.1) and Boletín Estadístico de Hidrocarburos (various years).

1.2.3 Energy policy

The objectives of Spanish energy policy are to guarantee supply and ensure a larger contribution of energy in increasing the competitiveness of the Spanish economy, the reduction of energy consumption and compliance with the environmental objectives. Taking the above into account, the priority is established on progressing in the use of renewable energy sources and in technical developments possibly contributing to energy saving and efficiency.

The legal framework is based on Law 54/1997, of November 27th, on Electric Sector, and Law 34/1998, of October 7th, on Hydrocarbon Sector, and the rules in relation with them.

Law 54/1997 established a division between regulated activities (transport and distribution) and non-regulated activities (production and commercialization), and imposed electricity companies to separate these activities both accountably and legally. Law 54/1997 was modified by Law 17/2007, of July 4th, to adapt the Spanish electric sector to Directive 2003/54/EC concerning common rules for the internal market in electricity. The objective of this Directive was to create conditions more conducive to genuine, fair competition and to put in place a true single market. It placed an obligation on Member States to take the measures necessary to attain clearly defined objectives such as to protect vulnerable customers, to protect consumers' fundamental rights and to promote economic and social cohesion.

One of the main changes introduced in the electric Sector by Law 17/2007 was the elimination, as from July 1st 2009, of the tariff supply. From that date, the electricity supply is carried out by traders on a free market basis. The tariff supply has been substituted by “the last resort supply”, and the Administration establishes maximum prices called “last resort tariffs” to guarantee the universal service, addressed to final consumers with electric power equal or below 10 Kw. Royal Decree 485/2009, of April 3rd, regulates the start-up of the mentioned last resort supply. Law 17/2007 also established different dates to reduce the last resort suppliers.

Law 34/1998 was also modified (by Law 12/2007, of July 2nd) to adapt the sector to Directive 2003/55/EC concerning common rules for the internal market in natural gas. This Directive established common rules on the storage, transmission, supply and distribution of natural gas, and laid down detailed rules on the organization and functioning of the natural gas sector, including liquefied natural gas (LNG), biogas and gas from biomass and other types of gas. Law 12/2007 substituted the integral tariff supply by the last resort supply for the gas market as well. It also introduced a calendar to reduce gradually the number of last resort consumers from January 2008 to July 2010.

Other important issues concerning current energy policy in Spain are:

1.3 The electricity system

1.3.1 Electricity policy and decision making process

As indicated in other sections, the energy policy in Spain has tended to liberalize progressively the markets with the main target of decreasing the energy prices, ensuring the energy supply and the quality, also improving the energy efficiency, reducing the consumption and protecting the environment. This position is expressed by Law 54/1997, its amendment and the regulation in relation with it. This Law establishes regulations to guarantee the electric supply, the quality of it and try to get the lowest cost. It creates a liberalized wholesale market (seen precedent section) where the Government is responsible for approving the specific regulations and the prices are established by the economic agents.

The electricity system planning is thus indicative, as established in Law 54/1997, and not binding, except for transport installations, which are subject to a central binding planning. In the same way as for the electricity system, Law 34/1998 establishes an indicative planning for the gas system, except for the gas pipelines belonging to the basic grid, regasification capacity and installations for the storage of hydrocarbon strategic reserves, which are binding in order to ensure the supply. On May 30th 2008, the Council of Ministers approved the current electricity and gas sectors’ planning for the period 2008- 2016, that includes the planning of the current transport grids.

The aforementioned document (available at assumes an annual raise in the Spanish primary energy consumption of 1.4% between 2006 and 2016, reaching about 165 MToe in 2016. This increase would be inferior to the increase in the final energy (1.6%), due to a better performance of the foreseen electricity generation structure. A reduction of 1.6% (annually) in the energy intensity (primary energy consumption/GDP) is expected in the same period, and values below those of the 90’s could be reached, confirming last years’ trend and thus implying a trend change in respect of the continuous increase improved from 1990 to 2004.

As for the supply structure, a relevant increase in renewable energies and gas and a decrease in coal and oil are expected.

1.3.2 Structure of electric power sector

In Spain, there are five large electricity producers: Iberdrola, Endesa, Gas Natural Fenosa, Hidrocantábrico (EDP) and Viesgo (E.ON). The most important are the first three mentioned companies; their energy share accounting for about 63% in 2009.

Iberdrola was created in 1991when Iberduero and Hidroeléctrica Española merged.

Endesa was created in 1958, owned by the State of Spain, with the objective of promoting electric generation in power plants fed by national coal. In the 1990’s the private participation in the company was increased, and in 1998 the company became totally private. During its life, Endesa has bought other smaller electric companies, like ENHER, GESA, Electra de Viesgo, UNELCO, FECSA, ERZ and Compañía Sevillana de Electricidad. In October 2007, after some takeover bids from different electricity companies, ENEL and Acciona acquired Endesa, and two years later, ENEL agreed to buy out Acciona’s stake, and has currently 92% of its shares.

In 2009, Gas Natural acquired Unión Fenosa, which has led to the creation of Gas Natural Fenosa, the first integrated gas and electricity company in Spain and the third utility. The two companies began to operate as an integrated entity in September 2009.

There are also “special producers”, which, with the targets of energy saving and efficiency, produce electric energy using cogeneration (production of heat and electricity) or wind, biomass and wastes energies. In 2009, they produced about 30.5% of the national electric generation, representing an increase of 11% from the precedent year.

Another important company in the Spanish electrical sector is Red Eléctrica de España, S.A. (REE), which is the Spanish TSO (Transmission and System Operator), being consequently responsible for the technical management of the Spanish electricity system. REE, as the system operator, guarantees the continuity and security of the power supply and the proper coordination of the production and transmission system, performing its functions in coordination with the operators and clients of the Iberian power market. As the manager of the transmission grid, REE acts as the sole transmissioner and, as such, must guarantee that facilities are adequately developed and enlarged as needed, that they are maintained and enhanced on the basis of uniform and consistent criteria, that the transmission of power between external systems using the Spanish power system is properly managed, that the managers of other interconnected grids receive the information they need to guarantee safe operations, and that third party access to the grid is guaranteed under equal conditions.

REE was created in 1985, when the electric companies changed the majority of their installations in relation with electricity transportation, and they got a participation in the capital of this company. At the beginning, the majority of the capital of the company was owned by the State. At present, the shareholding structure of the company consists of a 20% stake held by the SEPI (Sociedad Estatal de Participaciones Industriales), with the remaining 80% being free float. Law 17/2007 introduced several modifications in the functioning and structure of REE, in order to guarantee the independence of the company as regards the other activities and participants in the electricity sector, since the activities pursued by REE are considered to be an essential service. Apart from the SEPI, the rest of shareholders can not own more that 5% of the shares.

The “Compañía Operadora del Mercado Español de Electricidad” (OMEL) (Market Operator), created by Law 54/1997, is in charge of the necessary functions for the financial management of the system referring to the efficient development of the electricity market. Specifically, it is in charge of the management of the system for the buying and selling of electrical energy with the functions outlined in the said Law, and the making of the corresponding settlements and payments and collections and, consequently, including the results of the daily and intraday electricity markets. In parallel to the Market Operator, the same Law on the Electric Sector set up the already mentioned System Operator (which is REE), to take charge of the technical management. Together with Portugal, Spain has set up the common Iberian electricity market (MIBEL), a governmental initiative whose integration started in 2008, and which is still being developed.

The National Energy Commission (CNE, Comisión Nacional de Energía), created by Law 34/1998, is the regulatory body of energy systems. Its aim is to regulate the energy systems, to maintain free competition and transparency of the performance, to benefit all the organizations working in the system and the consumers. The Commission is a public authority with independent legal identity, its own assets and full operational capacity. It is assigned to the Ministry of Industry, Tourism and Trade, which controls the effectiveness of its activity. The Commission is governed by a Board of Directors, made up of a Chairperson, a deputy Chairperson, a Secretary and seven members. All of them stay in the Commission for a six-year period and can be renamed for the same period. The Commission has advising organizations.

1.3.3 Main indicators


Average annual growth rate (%)
19701980 19902000 20082009 2000 to 2009
Capacity of electrical plants (GWe)
- Thermal6.8813.4819.6725.549.0048.187.33
- Hydro10.8812.8316.2317.9918.6218.420.26
- Nuclear0.151.097.517.577.727.720.21
- Wind1.8815.7117.2527.92
- Solar3.333.34
- other renewable0.020.800.7549.50
- Total17.9127.4043.4152.9695.1895.666.79
Electricity production (TW.h)
- Thermal27.6174.4973.68125.98194.03167.793.24
- Hydro27.7829.5326.1831.8126.1229.08-0.99
- Nuclear0.925.1951.959.3158.9752.76-1.29
- Wind32.5037.16
- Solar2.566.17
- other renewable3.703.88
- Total (1)56.31109.21151.76221.82317.88296.843.29
Total Electricity consumption (TW.h)73.0699.6994.122.85

(1) Electricity transmission losses are not deducted.

Source: : IAEA Energy and Economic Database, Libro de la Energía 2009 and Libro de la Energía 2008 (tables, and 2.1.1).


2000 20052008 2009
Energy consumption per capita (GJ/capita)92.67103.2295.8087.57
Electricity consumption per capita (kW.h/capita)4567.875590.655605.855225.58
Electricity production/Energy production (%)60.782.188.785.2
Nuclear/Total electricity (%)27.619.618.617.8
Ratio of self-sufficiency (%)26.321.121.723

Source: Libro de la Energía 2009, Libro de la Energía 2006 and Libro de la Energía 2001 (tables 2.1.1, 3.1.2.,,, 2.3.2 and 2.3.3). Statistical Yearbooks (several years). See web INE.


2.1 Historical development and current organizational structure

2.1.1 Overview

Nuclear Energy in Spain was developed in the early 50’s. At that time, the main organization responsible in this field was the Nuclear Energy Board (Junta de Energía Nuclear - JEN), a subordinate organization of the Ministry of Industry and Energy, with full powers for nuclear matters (in charge of personnel training, raw materials procurement, basic scientific research and technology development, among others). In view of the growth of nuclear activities, and with it the multiplication of regulations in this area, the functions attributed to the JEN by the Spanish legislation, and especially the Nuclear Energy Act (Law 25/1964, of April 29th), were transferred to the other organisations or entities that currently play an important part in this area, such as the Nuclear Safety Council (Consejo de Seguridad Nuclear - CSN), the Empresa Nacional de Uranio, S.A (currently, ENUSA Industrias Avanzadas, S.A.), or the Empresa Nacional de Residuos Radiactivos, S.A. (ENRESA), and the Board was finally replaced by the Centre for Energy-Related, Environmental and Technological Research (CIEMAT) by virtue of Law 13/1986, of April 14th, on the Promotion and General Coordination of Scientific and Technical Research.

In the late 60’s, the construction of the first generation nuclear power plants José Cabrera, Santa María de Garoña and Vandellós I started. In the early 70’s the construction of the second generation NPPs as Almaraz I and II, Lemóniz I and II, Ascó I and II and Cofrentes started.

In 1972, ENUSA, a state owned company, was established, taking charge of all the nuclear fuel cycle front-end activities. Its shareholders are the SEPI, holding 60% of the capital, and the CIEMAT, holding the remaining 40%. Law 15/1980, of April 22nd, created the Nuclear Safety Council, the only organization competent in nuclear safety and radiological protection matters in Spain.

In the early 80’s, the construction of the NPPs Valdecaballeros I and II, Vandellós II and Trillo I, NPPs started, and preparatory studies for Trillo II were initiated.

In 1983, a moratorium was established (construction pause) for Lemóniz I and II Valdecaballeros I and II, and Trillo II. In 1994, the definitive cessation of the nuclear power plants under the moratorium was decided.

In 1984, ENRESA was established. The State owned company is responsible for the radioactive waste management and the dismantling of nuclear installations in Spain.

2.1.2 Current organizational chart(s)

Figure 1 shows the current institutional framework of Nuclear energy in Spain:

FIG. 1. Institutional Framework

For information about licensing authorization, see section 3.1.2 of this document.

2.2 Nuclear power plants: Overview

2.2.1 Status and performance of nuclear power plants

Nuclear generation amounted to 61,914 million kWh in 2010, which has meant a 17% increase with regard to the previous year. Likewise, Load and Time Availability Factors have increased to 90.8% and 92.97% respectively, compared to 2009’s values (78.13 and 80.14%).

In 2010, 4 nuclear reactors have had outages (Garoña, Almaraz II, Ascó II and Trillo), compared to the 7 refuelling outages carried out in the precedent year. Both planned and unplanned energy capability loss factors have decreased to 5.47% and 3.20% respectively. With all this, the unit capability factor was 91.33%, as against 78.86% of the previous year.

In 2010, there have been 10 unplanned shutdowns in Spanish nuclear power plants as a whole, compared to the 13 of 2009; thus a slight improvement is appreciated in this sense. Of these 10 shutdowns, 4 have been unplanned scrams and 6 have been carried out by operators following normal shutdown procedures. None of these shutdowns has had any impact on the safety of the facilities or on the radiological protection of the operating personnel, the public or the environment. Thus, shutdown ratios per reactor and year have improved, hitting very low values (0.75 unplanned manual shutdowns/reactor·year and 0.5 scrams/reactor·year).


StationType Net CapacityStatus OperatorReactor Supplier Construction DateCriticality Date Grid DateCommercial Date Shutdown Date
LEMONIZ-1PWR 883Cancelled Constr. IDWH 1974-03-141984-04-01
LEMONIZ-2PWR 883Cancelled Constr.IDWH1974-03-141984-04-01
VALDECABALLEROS-1BWR 939Cancelled Constr.ID/CSEGE1979-08-171984-04-01
VALDECABALLEROS-2BWR 939Cancelled Constr.ID/CSEGE1979-08-171984-04-01
ALMARAZ-1PWR 1011OperationalCNATWH1973-07-031981-04-051981-05-011983-09-01
ALMARAZ-2PWR 1006OperationalCNATWH1973-07-031983-09-191983-10-081984-07-01
ASCO-1PWR 995OperationalANAVWH1974-05-161983-06-161983-08-131984-12-10
ASCO-2PWR 997OperationalANAVWH1975-03-071985-09-111985-10-231986-03-31
COFRENTESBWR 1064OperationalIDGE1975-09-091984-08-231984-10-141985-03-11
SANTA MARIA DE GARONABWR 446OperationalNUCLENORGE1966-09-011970-11-051971-03-021971-05-11
TRILLO-1PWR 1003OperationalCNATKWU1979-08-171988-05-141988-05-231988-08-06
VANDELLOS-2PWR 1045OperationalANAVWH1980-12-291987-11-141987-12-121988-03-08
JOSE CABRERA-1 (ZORITA)PWR 141Permanent ShutdownUFGWH1964-06-241968-06-301968-07-141969-08-132006-04-30
VANDELLOS-1GCR 480Permanent ShutdownHIFRENSACEA1968-06-211972-02-111972-05-061972-08-021990-07-31

Source: Spanish Power Nuclear Power Plants in 2009-UNESA and individually provided by operators for 2010 data

* UCF (Unit Capability Factor) (only applicable to reactors in operation).

FIG.2 Location of Spanish NPPs

2.2.2 Plant upgrading, plant life management and license renewals

The nuclear units in operation are 22 to 39 years old and there is no legal provision regarding lifetime extension. The current policy of the government as regards nuclear energy contemplates the progressive reduction of the share of nuclear power in the energy mix, while ensuring security of supply and nuclear safety at all times.

Since the beginning of nuclear power operation, the plants’ power levels have been continuously upgraded, currently total net increase equals one medium size new plant. Ascó I and II, Almaraz I and II, Cofrentes and Vandellós II were refurbished, up-graded and up-rated in the last decade.

On July 4th 2006, Nuclenor submitted the application for the 10-year renewal of the Santa María de Garoña NPP operating license to the Ministry of Industry, Tourism and Trade (MITYC). The MITYC awarded the renewal of the operation license until July 6th 2013 (a four-year license), establishing this date as the one of definitive shutdown of the plant. In renewing the license, the MITYC has taken into account aspects relating to energy planning or the socioeconomic development of the region, among other things, and has not questioned safety issues.

As for other NPPs, license renewals for Almaraz I and II and Vandellós II were granted in June and July 2010 respectively, for another 10 years, after favourable report by the Nuclear Safety Council. Operation licenses for Ascó and Cofrentes will be revised in 2011 and for Trillo in 2014.

2.3 Future development of Nuclear Power (NOT APPLICABLE)

2.3.1 Nuclear power development strategy

Not applicable

2.3.2 Project management

Not applicable

2.3.3 Project funding

Not applicable

2.3.4 Electric grid development

Not applicable

2.3.5 Site Selection

Not applicable

2.4 Organizations involved in construction of NPPs

Architect Engineers

The Spanish Engineering Companies which play the main role in the National Nuclear Sector are Empresarios Agrupados, Initec, Inypsa and Sener. These companies have collaborated solely or in consortium with others in launching the first generation NPPs and in successive projects, increasing progressively the nuclear installed capacity. The first NPPs were carried out as turn-key projects and only in the following projects were local engineering companies involved. The scope of each project has been different, having the engineering companies focused on different activities such as design, licensing, procurement operations and collaboration in start-up and in tests. At this moment, as there are no NPPs under construction, these Architect Engineers companies have concentrated on operational support, shutdown and decommissioning of NPPs, research and development and radioactive waste engineering activities.

NSSS Manufacturers

The main Spanish NSSS manufacturer is Equipos Nucleares, S.A. (ENSA), which designs, produces and inspects NPPs primary circuit equipment and components. Its manufacturing plant is located in Maliaño (Cantabria). This company is State owned through the SEPI, which controls 100% of its shares. ENSA is also constructing double purpose casks, called ENSA-DPT, to store and/or transport spent fuel assemblies.

ENSA has provided primary circuit equipment’s as steam generators, reactor vessels, etc. and components to the second and third generation Spanish NPPs and has exported to several countries as Germany, Argentina, United Kingdom, India, United States of America, Belgium and others.

In 2007, ENSA formed, along with ENUSA, Tecnatom and Ringo Válvulas, the Spanish Nuclear Group for China (SNGC), whose aims is the marketing and supply of nuclear products and services abroad, particularly in China.

Other Main Component Suppliers

The last NPPs built in Spain enclosed a large range of domestically made equipment and components. The following list of national manufacturers aims to be useful and includes only the main companies:

Turbines: Eumynsa, Tamoin Power Services

Pumps: Chepro, Amara Vorkauf

Air compressor: Abrasivos y Maquinaria

Valves: Masoneilan, Ringo Válvulas.

Electric equipments: Cantarey Reinosa, Gamesa Energía.

Instrumentation & Control: Indra Sistemas, TSI.

2.5 Organizations involved in operation of NPPs


The majority of the Spanish NPPs are co-ownership, and managed by Economic Interest Groupings (Agrupaciones de Interés Económico, AIEs). The following table shows the different owners and operators of Spanish NPPs:

NPPLisense OwnerOperator
CofrentesIberdrola Generación, S.A.Iberdrola Generación, S.A.
Sta. Mª de GaroñaNuclenor, S.A. (Iberdrola Generación, S.A. 50%; ENDESA Generación, S.A. 50%)Nuclenor, S.A.
Almaraz I
Almaraz II
Iberdrola Generación, S.A. (52,7%); ENDESA Generación, S.A. (36%); Gas Natural SDG, S.A. (11,3%)Centrales Nucleares Almaraz-Trillo, A.I.E.
TrilloIberdrola Generación, S.A. (48%); Gas Natural SDG, S.A (34,5%); Hidrocantábrico energía, S.A. (15,5%); Nuclenor, S.A. (2%)
Ascó IENDESA Generación, S.A.Asociación Nuclear Ascó-Vandellós, A.I.E.
Ascó IIENDESA Generación, S.A. (85%); Iberdrola Generación, S.A. (15%)
Vandellós IIENDESA Generación, S.A. (72%); Iberdrola Generación, S.A. (28%)

Operation Service Suppliers

There are several companies who offer operational services in the nuclear sector, as TECNATOM (participated by the principal electricity companies), LAINSA, ENWESA (participated by ENSA (75%) and Westinghouse Technology Servicies (25%)) and NUSIM.

TECNATOM provides training services to operational personnel of NPPs. It has PWR and BWR simulators. TECNATOM has also carried out several in-service inspection and maintenance activities giving support to the Spanish NPPs, and it is expanding its international presence to East Europe, Russia and Ukraine. LAINSA, ENWESA and NUSIM are focusing on maintenance and operational support to NPPs, quality assurance, radiological protection and various activities.

2.6 Organizations involved in decommissioning of NPPs

According to article 38 bis of the Nuclear Energy Act, in the wording done by Law 11/2009, of October 26th, management of radioactive wastes, including spent fuel, and the dismantling and decommissioning of nuclear installations (NPPs included) is an essential public service corresponding exclusively to the State, and commissioned to the company ENRESA. In this respect, ENRESA is constituted as a vehicle and technical service of the Administration, responsible for carrying out whatever functions might be assigned to it by the Government.

Royal Decree 1349/2003, of October 31st, also establishes that the responsibility for the management of operations deriving from the decommissioning of NPPs corresponds to ENRESA. For its part, the Nuclear and Radioactive Facilities Regulation (Royal Decree 1836/1999, of December 3rd, as amended) indicates that on expiry of the operation permit of a nuclear facility, the responsibility for its decommissioning is initially to the licensee of the installation who, prior to the grating of the decommissioning authorisation, undertakes the pre-dismantling activities. In order for this authorisation to be granted, the licensee of the operation license must previously have conditioned the radioactive waste generated during its operation, and unloaded the fuel from the reactor and from the pools. Once the ownership transferred to ENRESA, it is responsible for the performance of the dismantling and decommissioning activities.

To date, two nuclear units have been shut down: Vandellós I (in 1990) and José Cabrera (in 2006).

In 2008, the licence holder (Unión Fenosa at the time) received authorisation for the commissioning of the on-site spent fuel storage facility (Individual Temporary Storage, ATI in Spanish). From January 19th to September 3rd 2009, the spent fuel housed in the NPP pool (377 fuel assemblies) was loaded into 12 dry storage casks that were taken to its ATI.

2.7 Fuel cycle including waste management

Activities related to fuel cycle can be classified into front-end and back-end activities:

Front End Activities:

The front end of the nuclear fuel cycle is understood to include the processes relating to the production of nuclear energy, among them the acquisition and application of the nuclear materials used in operating nuclear reactors. The front-end activities are mining and milling, uranium conversion, uranium enrichment and the manufacturing of fuel assemblies:

Back End Activities:

The back end of the nuclear fuel cycle is understood to include the processes relating to the interim storage of spent fuel, waste management, reprocessing and ultimate disposal. In Spain, except for the reprocessing, these activities are undertaken by ENRESA, a State owned company, which was set up in 1984. Spain has opted for an open cycle for the nuclear spent fuel, which means that the spent fuel remains temporarily stored in the plant pools, complemented with other transitory storage systems, pending its final management. Reprocessing is not undertaken in our country, although, in the past, Spain initially opted for the reprocessing of the spent fuel from some NPPs, and their spent fuel was sent abroad for reprocessing. As a result of this, various intermediate and high level wastes resulting from reprocessing are to be returned to Spain in the following years.

As commented above, ENRESA is in charge of the radioactive waste management activities and the dismantling of nuclear installations, as established in the Nuclear Energy Act, in the wording done by Law 11/2009 (for detailed information, see section 2.6). The tutelage of ENRESA corresponds to the Ministry of Industry, Tourism and Trade (MITYC), via the Secretariat of State for Energy. The State is the owner of radioactive wastes once these have been definitively disposed of. Likewise, it shall undertake whatever surveillance might be required following the decommissioning of a nuclear facility, following the period of time established in the corresponding declaration of decommissioning.

On the other hand, the Government is responsible for establishing the policy regarding radioactive waste management, including spent nuclear fuel, and the dismantling and decommissioning of nuclear facilities, through the approval of the General Radioactive Waste Plan (GRWP).

ENRESA is assigned the following duties:

ENRESA has a medium and low-level and radioactive waste storage installation located in “El Cabril” (Córdoba), in operation since 1992. On July 21st 2008, the MITYC granted the license of a new very low level waste disposal facility situated in the same site, consisting on 4 cells with a total capacity of 130,000 m3. For the time being, only one cell with a total capacity of 33,000 m3 has been constructed and is operating.

ENRESA draws up a proposal of GRWP, as established in the Royal Decree by which the company was constituted, and submits it to the MITYC for approval by the Government, following a report by the Nuclear Safety Council and after having heard the Autonomous Communities in relation to land planning and environment.

The GRWP itself is the basic reference document that deals with all the strategies and actions to be undertaken in Spain in the different fields of radioactive waste management and the dismantling of facilities, along with the corresponding economic-financial study. On June 23rd 2006 the Spanish Government approved the 6th General Radioactive Waste Plan. The basic reference scenario therein established may be summarized as follows:

On the basis of the abovementioned, the total volume of radioactive waste to be managed in Spain, conditioned and ready for definitive disposal at the ENRESA installations at “El Cabril”, will be some 176,300 m3 In the case of the LILW, this also includes those wastes that in view of their very low levels of activity may be managed specifically (VLLW). Furthermore, the volume of wastes not open to disposal at “El Cabril” would amount, following encapsulation, to some 12,800 m3, some 10,000 m3 of which would be spent fuel (6,674 tU) and the rest other intermediate or high level wastes from reprocessing or the dismantling of the NPPs.

In terms of High Level Wastes (HLW), the spent fuel from the majority of the Spanish NPPs in operation is currently stored in the pools of the corresponding plants. In view of the forthcoming saturation of the storage capacity of these pools, the original racks were progressively replaced with other more compact units, this having allowed the need to provide a storage capacity additional to the pools to be significantly deferred in most cases. However, a storage facility for Trillo NPP is in operation since 2002. The saturation of the fuel pools at the Ascó NPP is expected by 2012, so another storage facility for this plant is being licensed.

With regard to definitive management, it should be pointed out that in Spain work has been on-going since 1985 on the deep geological disposal option, in 4 basic areas:

The basic Spanish strategy in this field focuses on the temporary storage of spent fuel and HLW on the basis of a dry storage system guaranteeing the safety and protection of people and the environment over the time periods required for their definitive or very long term management.

Specifically, the solution proposed, in view of the analyses performed from the technical, strategic and economical points of view, is based on the availability of a vault type Centralised Temporary Storage (CTS, in Spanish ATC) facility whose operating period would be some 60 years. From the point of view of economic calculation and planning, it has been assumed that a definitive disposal facility could be put into operation around the year 2050, which would house the spent fuel, the HLW and those other intermediate activity wastes that cannot be sent to the “El Cabril” facility.

As regards the ATC for SF and HLW, the MITYC published on December 29th 2009 in the Official Journal, a Resolution by which a public call for the selection of candidate municipalities to host the ATC was launched. The project will include a storage facility able to accept 6,700 tU of SF, as well as all other RW which are not suitable for disposal at “El Cabril” disposal site. In addition a Technology Centre is to be built in order to assure the technologies and knowledge for SF and HLW for final management following ENRESA’s R&D Plan. The investment, in the range of 700 M€, will last 19 years in three phases. The project consists in a dry storage system with 12 vaults and natural convection air cooling. In 2006, the Nuclear Safety Council gave its favourable appreciation to the generic design.

Municipalities had one month to present their applications, which included a formal decision of the City Council. 14 applications were presented, out of them 8 were considered to comply with the criteria established in the public call. A great number of allegations were presented within the period established in the call; and a report on the assessment of the allegations was published. In September 2010, based on the sites suggested by the candidates, the final assessment report proposing the sites to host the ATC was approved by the Interministerial Commission created in 2006 for this purpose, and referred to the Government. The site decision by the Government will be the final stage of the process. All the information on this process is published in

2.8 Research and development

2.8.1 R&D organizations

The Ministry of Industry, Tourism and Trade (MITYC), in collaboration with the Nuclear Safety Council, the electricity industry and other agents involved in the nuclear sector, set up in 2007 a Technology Platform on Fission Nuclear Energy (CEIDEN), in order to coordinate the different national programs and plans on R&D and foster also the participation of Spanish companies or institutions in international R&D programs. This Platform is the continuation of the Strategic Committee established in 1999, and is currently composed of around 70 members. The five main programs that CEIDEN is working on are:

The Ministry of Science and Innovation elaborates each four years a Research and Development National Plan which defines the general framework of the Spanish R&D and innovation policy. The 12th July 2007 the R&D National Plan 2008-2011 was approved by the Interministerial Commission on Science and Technology. Nuclear Energy is included inside the Energy Sector.

CIEMAT is an institution attached to the Ministry of Science and Innovation. One of its duties is nuclear research. It collaborates with several institutions in Spain and abroad.

In the ENRESAS´s 2009-2013 R&D program (the sixth) five major areas have been defined:

The content of the Plan is governed by the directives mapped out for these activities in the GRWP. The directives of the current GRWP are focussed on providing support for the CTS facility and ENRESA’s operating installations, including those that are to be dismantled, on developing separation and transmutation capacities and on providing support for basic generic long-term storage projects. The total investment in R&D for this period amounts to 26 million euros, of which .5 million correspond to the completion of the previous ENRESA’s R&D Plan (2004-2009), and the remainder (22.5 million euros) to the new Plan.

The Nuclear Safety Council develops a four-year R&D Plan (2008-2011). This plan includes a number of projects which are undertaken in collaboration with different national and international organisations, among which special mention might be made of the Spanish universities, public centres and companies. The current CSN’s R&D Plan includes the following programmes:

2.8.2 Development of advanced nuclear technologies

As for the R&D programs dealing with Advanced Reactors, see next Section.

In Spain there is no implementation plan on advanced nuclear technologies.

2.8.3 International co-operation and initiatives

Spain, as member of the European Union, carries out most of its international activities within the Community framework.

In the EU, one of the most important programmes is the R&D Framework Programme for nuclear research and training activities for the period 2007-2011 (see Council Decision 2006/970/Euratom, of 18 Dec 2006 concerning, the 7th FP of Euratom). Under the 7th FP, 2.7 billion euros is available for research activities in fusion energy, and nuclear fission and radiation protection.

Spain also participates in programmes for technical assistance to other countries. Until 2006, the TACIS Nuclear Safety Programme was the main instrument of the EU for improving the safety of nuclear installations in third countries, namely in Eastern and Central Europe. Since 2007, the Community assistance to third countries is being provided through the Instrument for Nuclear Safety Cooperation (INSC), which implies an extension of the geographical scope of the aids.

Spain also participates in the Chernobyl Shelter Implementation Plan and is Member of the Contributor Assembly Fund established in the European Bank for Reconstruction and Development (EBRD).

Our country is one of the 31 members of the International Project on Innovative Nuclear Reactors and Fuel Cycles (INPRO), whose objective is to support the safe, sustainable, economic and proliferation-resistant use of nuclear technology to meet the global energy needs of the 21st century.

On Sept 2007, an European Technology Platform on Sustainable Nuclear Energy (SNETP) was launched. This platform aims to support fully through R&D programmes the role of nuclear energy in Europe’s energy mix, its contributions to the security and competitiveness of energy supply, as well as the reduction of greenhouse gas emissions. To achieve this objective, SNETP has elaborated a Strategic Research Agenda (SRA). It gathers over 75 members from industry, research, academia, technical safety organisations, etc, including some Spanish organisations or enterprises, as CIEMAT, Deloitte, Endesa, Iberdrola, Empresarios Agrupados, or Tecnatom.

In the context of the European Strategic EnergyTechnology Plan (SET-Plan), it is worth noting the formal launch in November 2010 of the European Sustainable Nuclear Industrial Initiative (ESNII), which is a major initiative to help develop a new generation of nuclear energy reactors designed to respond to Europe’s growing energy needs. This group of industry and research partners will promote Europe’s leadership in the development of the so-called Generation IV Fast Neutron Reactor Technology. CIEMAT participates in the task force created under the umbrella of the ESNII.

Moreover, Spain participates in the programmes of Nuclear Energy Agency (NEA/OECD) and International Atomic Energy Agency (IAEA).

2.9 Human resources development

The Spanish Nuclear Sector generates 9,000 direct employments (3,500 of which are superior) and about 10,000 indirect employments. The estimated average age of employers is 45-50 years, so next years a renewal of at least half of the workers will be needed.

Nowadays in Spain the specific nuclear postgraduate training is given to 100-150 people.

The Universidad Politécnica de Madrid in collaboration with Tecnatom, gives a Master on Electric Generation Technologies. The fifth part of this Degree is about nuclear energy subject.

The CIEMAT, which has a wide experience in training on nuclear energy, is developing together with Universidad Autónoma de Madrid the Master Degree on Nuclear Technology: Fission, Fusion and Nuclear Medicine.

Finally, In order to contribute to ensuring that NPP and other industrial facilities have optimally qualified operations, maintenance, engineering and technical support personnel whose performance serve to improve safety, availability and economic efficiency, TECNATOM provides overall training services in the following fields:

- Process technology

- Operation and maintenance

- Materials, non-destructive testing

- Human factors

- Management skills

2.10 Stakeholder Communication

Stakeholder communication is present in the activities accomplished by the different organisations related to nuclear energy.

The Nuclear Safety Council’s most important mission is to guarantee that people and the environment are protected against radiation, but an essential part of this objective includes working with maximum transparency to ensure that the public is duly informed. The obligations for the Council regarding information and communication are channelled along three routes: information for the state institutions, in the neighbourhood of nuclear installations, and for the general public

With regard to communication, one of the most important means is its website, which provides interest groups and the general public with documents which offer detailed information on the work done, including the minutes of the plenary meetings, inspection reports and other useful information such as publications, current regulations, replies to parliamentary questions, operating status of NPPs, events reported by the licensees and the environmental values collected. Furthermore, since 2007 it is possible to access the Integrated Plant Supervision System (SISC), which has become a fundamental tool as regards the transparency of communication with the public on the assessment of NPP performance and the planning of its regulatory efforts.

In addition, Law 33/2007, of November 7th, which modified the Law 15/1980 creating the Nuclear Safety Council, was very ambitious as regards public information, the objective clearly being to increase the transparency of the organisation and promote confidence among the members of the public regarding the activities of the Council. The Law also contemplates the existence of an Advisory Committee for Public Information and Participation, made up of representatives of various social organisations and institutions, the mission of which is to make recommendations to improve transparency and propose measures to stimulate access to information and the participation of the public in areas for which the Council is responsible.

The Ministry of Industry, Tourism and Trade (MITYC), also provides information through its web page It provides that, prior of the granting of most of the licences for nuclear installations, the corresponding documentation must be transferred to the Autonomous Communities with responsibilities in relation to land planning and the environment whose territory houses the facility. Within the arrangements for the request for the preliminary license of a NPP, a specific public information process is envisaged. According to the Nuclear and Radioactive Facilities Regulation, the MITYC will send a copy of the request to the respective regional Government Office for the latter to open a period of public information, this being initiated through the publication in the Official State Gazette and that of the corresponding Autonomous Community of an extract announcement setting out the objective and the main characteristics of the facility. This announcement shall establish that those persons and entities that consider themselves to be affected by the project may, within 30 days, present whatever written allegations they deem to be appropriate. As for nuclear regulatory matters, the MITYC publishes in its web page the bills and other general regulation provisions projects as part of the legislative process.

The Nuclear and Radioactive Facilities Regulation contemplates the operation of local information committees, which are forums for information and public participation whose objective is to provide information and education for the local population on nuclear safety and radiation protection, in which respect a programme of annual meeting is held. It is presided over by the MITYC.

As for environmental matters, Spain ratified in 2004 the Aarhus Convention, which is materialised in the national legislation through Law 27/2006, of July 18th, regulating rights of access to information, public participation and access to justice in relation to environmental issues.


3.1 Regulatory framework

3.1.1 Regulatory authority(s)

In Spain, the regulatory function in nuclear matters is undertaken by several different authorities:

Other powers are:

At present, the technical workforce of the Council consists of around 470 people. It has permanently two resident inspectors at every NPP site. The main tasks of the Council are:

3.1.2 Licensing Process

The nuclear installation licensing procedure in Spain is regulated by Law 25/1964, of April 29th, on Nuclear Energy, as amended. The provisions of this Law have been developed by Royal Decree 1836/1999, of December 3rd, approving the Nuclear and Radioactive Facilities Regulation, on the procedure for licensing the nuclear and radioactive installations regulation. To license nuclear installations, the following successive authorizations are needed:

For plant dismantling and plant modification, an authorization is required prior to the activity. Figure 2 shows the nuclear installation licensing procedure. These authorizations and permissions are granted by the MITYC, under previous and perceptive report referring to nuclear safety and radiological protection issued by the CSN. This report is binding if negative in its findings or denying authorisation, or as regards the conditions established when positive.

To obtain these authorizations and permissions, the documents determined in the current regulations must be submitted to the licensing authorities and the suitable tests, analyses and validations must be performed. Nuclear installations require authorizations granted by other administrative bodies, belonging to local administrations, according to the rules of these bodies, although these can not be denied or conditioned for safety-related reasons. Before granting the preliminary or the decommissioning authorization, a 30 days period is established for public hearings. During this period anyone can present allegations. This public information process is developed jointly with the information process required for the Environmental Impact Assessment, which must be approved by the Ministry of the Environment and Rural and Marine Affairs.

FIG. 3. Licensing of nuclear installations

3.2 Main national laws and regulations in nuclear power

In Spain, nuclear power is governed by a large number of provisions in the form of Laws, Royal Decrees and Ministerial Orders. In a more detailed level, the CSN approves instructions, which are binding technical standards, as well as other non binding documents.

The main provisions are the following:


[1] España Anuario Estadístico (varios años). Instituto Nacional de Estadística.

[2] IMF World Economic Outlook Database.

[3] Boletín Estadístico de Hidrocarburos (varios años).

[4] La energía en España (varios años) Ministerio de Industria Turismo y Comercio (

[5] Instituto para la diversificación y ahorro de la energía (IDAE,

[5] IAEA Energy and Economic Data Base (EEDB).

[6] Sixth General Radioactive Waste Plan (June 2006) (

[7] IAEA Power Reactor Information System (PRIS).

[8] Spanish Power Nuclear Power Plants in 2009-UNESA.

[9] Nuclear Legislation in OECD Countries – Report Spain (


In 1985, Spain adhered to the Treaties that constitute the European Communities and in January 1st 1986 Spain became a European Communities Member State. From this moment, international and national legislation applicable in Spain is accomplished according to the rules of the European Union.

Moreover, Spain is a Member State of the IAEA and of the OECD/NEA, whose Constitutive Treaties, Conventions and additional Treaties have been ratified.

AreaTreatyDocumentSignatureSpanish SignatureEffect DateEffect Date for Spain
SafeguardsNPT (Nuclear Non-Proliferation Treaty)INFCIRC/14001.07.196805.03.197005.11.1987
Physical ProtectionConvention on the Physical Protection of Nuclear Material INFCIRC/274/Rev103.03.198007.04.198608.02.198706.10.1991
08.07.2005Not yetNot yet
Civil LiabilityVienna Convention on Civil Liability for Nuclear Damage and its Protocol to Amend (IAEA)INFCIRC/500 INFCIRC/56621.05.1963
Revised: 12.09.1997
Signed 1963 convention (not the amendment)12.12.1977
Revised: 04.10.2003
12.02.200412.02.2004Not yetNot yet
12.02.200412.02.2004Not yetNot yet
INFCIRC/56729.09.1997No signatureNot yet
INFCIRC/40221.09.198821.09.198827.04.1992Not yet
Nuclear SafetyConvention on Nuclear SafetyINFCIRC/44920.09.199415.10.199424.10.199624.10.1996
Nuclear TestsCTBTO (Comprehensive nuclear test ban treaty organization)10.09.199624.09.1996No yet, waiting for the signature of some required states, such as India, Pakistan or USANo yet, waiting for the signature of some required states, such as India, Pakistan or USA
Nuclear AccidentsConvention on Early Notification of a Nuclear Accident INFCIRC/33526.09.198626.09.198627.10.198614.10.1989
IAEAAgreement on the Privileges and Immunities of the International Atomic Energy AgencyINFCIRC/9 Rev201.07.1959Approved by Border Governors29.07.196021.05.1984
RSAnot apply10.06.1980not apply10.06.1980
Nuclear TerrorismInternational Convention for the suppression of International Terrorism13.04.200514.09.200507.07.200707.07.2007
OthersAntarctic Treaty01.12.195923.06.196131.03.1982
GroupsZangger CommitteeINFCIRC/20924.05.190501.05.1993
INFCIRC/254 parts I y II27.05.190510.06.1905


Name of report coordinator




Ministerio de Industria, Turismo y Comercio Tel: +34 902 44 60 06

Paseo de la Castellana, 160 Fax: +34 91 457 80 66

E-28046 Madrid

Consejo de Seguridad Nuclear (CSN) Tel: +34 91 346 01 00

Nuclear safety and radiological protection Fax: +34 91 346 05 88

Justo Dorado Dellmans, 11

E-28040 Madrid



Vandellós II



Santa María de Garoña




Research and development centre Tel.: +34 91 346 60 00

Avenida Complutense, 22 Fax: +34 91 346 60 05

E-28040 Madrid


Asociación Española de la Industria Eléctrica Tel.: +34 91 567 49 00

Francisco Gervás, 3 Fax: +34 91-567 49 88

28020 Madrid


Service inspection and maintenance Tel.: +34 91 659 86 00

Avenida Montes de Oca, 1 Fax: +34 91 659 86 77

28703 San Sebastián de los Reyes (MADRID)

EMPRESARIOS AGRUPADOS A.I.E. Tel.: +34 91 309 80 00

Architect-Engineering Fax: +34-91 591 26 55

Magallanes, 3

28015 Madrid


Back-end of the fuel cycle Tel.: +34 91566 81 00

Emilio Vargas, 7 Fax: +34 91 566 81 69

28043 Madrid


Front-end of the fuel cycle Tel.: +34 91 347 42 00

Santiago Rusiñol, 12 Fax: +34 91 347 42 15

28040 Madrid


Association for fusion (Spain)


Technology Platform on Fission Nuclear Energy

Nuclear Engineering Department

Polytechnic University of Madrid



Gas Natural Fenosa

Spanish Nuclear Industrial Forum

Spanish Nuclear Society (SNE)





From:Multiply by:
TJ1238.82.388 x 10-5947.80.2778
Gcal4.1868 x 10-3110-73.9681.163 x 10-3
Mtoe4.1868 x 10410713.968 x 10711630
Mbtu1.0551 x 10-30.2522.52 x 10-812.931 x 10-4
GWh3.68608.6 x 10-534121


From:Multiply by:
kg (kilogram)10.0019.84 x 10-41.102 x 10-32.2046
T (tonne)100010.9841.10232204.6
Lt (long tonne)10161.01611.122240.0
st (short tonne)907.20.90720.89312000.0
lb (pound)0.4544.54 x 10-44.46 x 10-45.0 x 10-41


To:US galUK galbblft3Lm3
From:Multiply by:
US gal (US gallon)10.83270.023810.13373.7850.0038
UK gal (UK gallon)1.20110.028590.16054.5460.0045
bbl (barrel)42.034.9715.615159.00.159
ft3 (cubic foot)7.486.2290.1781128.30.0283
l (litre)0.26420.220.00630.035310.001
m3 (cubic metre)264.2220.06.28935.314710001


Spain 2011.pdf