Correction of the Reactivity Measured by ORUK Technique

Zhitarev, V. E.; Kachanov, V. M.; Sergevnin, A. Yu.; Sutemieva, N. E.

doi:10.1134/s1063778821080214

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2023

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“…A method has been developed to correct reactivity values by accounting for changes in both the neutron flux function and detector efficiency (Zhitarev et al, 2021). Based on an analysis of the inverse point kinetics equation, the influence of the background current on the measured reactivity is analyzed and a method for iterative calculation of reactivity is introduced (Huo et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Nuclear Reactivity Calculation with Reduction of Fluctuations

Suescún-Díaz¹,

Ule-Duque²,

Chala-Casanova³

2023

IJTech

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This article presents a study based on a series of numerical experiments. It demonstrates the possibility of reducing fluctuations in the calculation of reactivity using the second Bernoulli number based on the approximation of the Euler-Maclaurin formula. This approach requires knowledge of the first three derivatives, which are implemented progressively. The fluctuations are assumed to occur around an average value of the neutron density with a Gaussian distribution. Jitter reduction is performed with a first-order delayed low-pass filter for different forms of neutron population density, with different time steps and with different filter constants. The numerical results show that the method can be used as a digital reactivity meter.

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Section: Introductionmentioning

confidence: 99%