Decommissioning activities for zero-power reactors, radiodiagnostic and radiotherapy hospital departments, and laboratories and factories using radioactive material may be erroneously perceived as trivial and of low priority. This publication provides practical information, experience and assistance aimed at a broad spectrum of practitioners who are faced with the decommissioning of such small nuclear facilities. Particular consideration is given to the financial and scientific resources, and early planning, which are all factors essential to efficient and effective decommissioning. This book is written as a simplified, stepwise guidance to nuclear operators who may have little or no experience in decommissioning. An accompanying CD-ROM contains practical information in two annexes, including descriptions of decommissioning project problems encountered, solutions and analyses, and lessons learned.