Evaluation of Fuel Reactivity Worth Measurement in the Prototype Fast Reactor Monju

Ohgama, Kazuya; Takegoshi, Atsushi; Katagiri, Hiroki; Hazama, Taira

doi:10.1080/00295450.2022.2045532

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…In all numerical experiments, the time step varies in the interval [0.001, 0.1] s, and the standard deviation is σ = 0.001. For the different derivatives of neutron density represented in equations (11-13), the progressive derivatives are taken (Mathews and Fink, 2005), represented by equations (14-16).…”

Section: Resultsmentioning

confidence: 99%

“…For the calculation of the first, second and third derivatives, the progressive derivatives are implemented (Mathews and Fink, 2005) as given by equations (14-16):…”

Section: N R P R H N P H P N Pnmentioning

confidence: 99%

“…In recent decades, different experimental and computational methods have been developed to estimate the reactivity value in the core of a nuclear reactor. Studies have been carried out in a BAEC TRIGA Mark-II research reactor to analyze the effects of reactivity insertion, as well as in a prototype fast breeder reactor Monju (Hossain et al, 2022;Ohgama et al, 2022). The results are validated by a deterministic model given by the Inhour equation and the Monte Carlo method.…”

Section: Introductionmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 99%

“…For the calculation of the first, second and third derivatives, the progressive derivatives are implemented (Mathews and Fink, 2005) as given by equations (14-16):…”

Section: N R P R H N P H P N Pnmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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