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ADS/P4-09
Current-to-Flux Experimental Results in the YALINA–Booster Subcritical Assembly
D. Villamarín1, M. Fernández-Ordóñez1, V. Bécares1, E.M. González-Romero1, C. Berglöf2, V.
Bournos3, I. Serafimovich3, S. Mazanik3, and H. Kiyavitskaya3
1Nuclear Innovation Group, CIEMAT, Madrid, Spain
2Reactor Physics Department, Royal Institute of Technology, Stockholm, Sweden
3Joint Institute for Power and Nuclear Research, National Academy of Sciences, Minsk, Belarus
Corresponding Author: david.villamarin@ciemat.es
As a part of the IP-EUROTRANS experimental program at YALINA–Booster, presented in this
conference, a set of measurements concerning the current-to-flux techniques has been performed.
In a subcritical assembly coupled to an accelerator operating in continuous mode, the power of
the reactor is related to the accelerator beam current and the external neutron source strength.
It is generally assumed that by monitoring the ratio between the accelerator beam current and
the neutron source intensity as well as the ratio between the neutron source intensity and the core
power, any change in the system can be detected. With this methodology, changes in the system
caused by reactivity transients can be isolated. However, it has been observed that this is only
true for transients in the time scale of seconds. At CIEMAT, an acquisition system capable of
monitoring the core power, the accelerator beam current and the neutron source intensity in the
millisecond scale has been developed. It has been observed that, in these short time ranges, the
proportionality relationship between these three quantities is not always fulfilled.
The authors have assigned to the International Atomic Energy Agency a non-exclusive, royalty-free licence to publish this paper.
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