Optimal regulation of a reactor in a regime of an extension of an operation period due to suppression of xenon poisoning

Conclusions

The results obtained demonstrate that the operation period extension regime can be optimized by suppressing the poisoning by xenon during power cycling [4].

Each cycle of regulation of the optimized regime [4] contains intervals during which the power is correspondingly decreased with the maximum admissible rate, maintained at the minimum fixed level, increased with maximum admissible rate, increased with the reactor maintained with a zero reactivity excess, and maintained at the maximum fixed level.

The computed operation duration and admissable power production in the optimized operation period extension regime correspond to the currently adopted regimens [1].

It can be expected that the solution of the optimization problem obtained in the point approximation will remain of the same form on switching to spatially dependent variables, since the spatial nonuniformity can be limited, without introducing additional parameters into the problem, by increasing the lower power limit X_4min. Analysis of the characteristics of the regime which are associated with the spatial dependence of the coordinates X_i is best done for a specific reactor in a computational model that takes account of the structural features of the reactor. Taking account of the advantages mentioned above, the optimized regime for extension of an operation period is promising for nuclear power plants with BBER reactors.