On the cyclic change in the dynamics of the IBR-2M pulsed reactor

It is shown that in the IBR-2M reactor by the end of the reactor cycle, changes in dynamics are observed associated with a strong weakening of the fast power feedback (PF), as a result of which the reactor becomes oscillatorily unstable. After each week of zero-power operation the negative changes i...

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Bibliographic Details
Published in:Nuclear engineering and technology 2023, 55(5), , pp.1665-1670
Main Authors: Pepelyshev, Yu.N., Davaasuren, Sumkhuu
Format: Article
Language:English
Subjects:
Control rod
IBR-2M
Power feedback
Pulsed reactor
Reactor stability
원자력공학
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Summary:It is shown that in the IBR-2M reactor by the end of the reactor cycle, changes in dynamics are observed associated with a strong weakening of the fast power feedback (PF), as a result of which the reactor becomes oscillatorily unstable. After each week of zero-power operation the negative changes in reactor dynamics disappear and the stability of the reactor is restored. Thus, the reactor undergoes cyclic changes in the oscillatory instability. The correlation between of a fast PF and a slow PF is experimentally observed, which makes it possible to almost completely eliminate the cyclic component of instability by changing the control mode of rods of the control system.
ISSN:1738-5733
2234-358X
DOI:10.1016/j.net.2023.01.004