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Reactivity Measurement in the Prompt-Jump Approximation for the Neutron Flux
Atomic Energy ( IF 0.5 ) Pub Date : 2020-07-01 , DOI: 10.1007/s10512-020-00672-w
B. D. Abramov

Methods of calculating the nuclear reactor reactivity from the measured time-dependence of the neutron flux are discussed. It is noted that the corresponding problems for the direct and inverse equations of point kinetics in the approximation of a prompt-jump change of neutron flux are not equivalent, which is expressed in that the reactivity values in these problems do not coincide with one another. The reasons for the nonequivalence and ways of its elimination are investigated. New equations of inverse point kinetics without this deficiency are proposed. It is shown that the proposed equations give the correct reactivity immediately after the onset of a perturbation in the reactor and not asymptotically as in the case of the conventional equations.

中文翻译:

中子通量快速跃迁近似中的反应性测量

讨论了根据测得的中子通量的时间依赖性计算核反应堆反应性的方法。注意到中子通量瞬变近似中点动力学正反方程的对应问题并不等价,表现为这些问题中的反应性值彼此不一致。对不等价的原因和消除方法进行了调查。提出了没有这种缺陷的反点动力学的新方程。结果表明,所提出的方程在反应器中扰动开始后立即给出正确的反应性,而不是像传统方程那样渐近。
更新日期:2020-07-01
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