Application of Monte Carlo solver Solomon to critical mass calculation of fuel randomization system

Watanabe, Tomoaki; Ueki, Taro; Suyama, Kenya

Proceedings of International Conference on Physics of Reactors (PHYSOR 2024) (Internet), 10 Pages, 2024/04

Solomon, a Monte Carlo solver being developed by JAEA, can calculate criticality in multi-material randomized systems for criticality evaluation of fuel debris. This study investigates the applicability of Solomon to critical mass calculations of fuel debris. We performed critical mass calculations of fuel randomization systems using Solomon. The fuel randomization systems, where burned fuels with different burnups and water are randomly distributed, were modeled by the incomplete randomized Weierstrass function (IRWF) model or voxel geometry in Solomon. Critical mass calculations of simple homogeneous and heterogeneous systems were also performed, and the critical sizes were compared to fuel randomization systems. The results showed that the fuel randomization causes significant variations in the critical mass. The obtained critical sizes were distributed close to a normal distribution, which made it reasonable to estimate the uncertainty of critical mass as the standard deviation. The critical sizes with uncertainty obtained by Solomon were smaller than those of a simple heterogeneous system. This indicates Solomon would be useful for estimating or evaluating a reasonable safety margin in criticality safety evaluations of fuel debris.

Annual report of STACY operation in F.Y. 1998, 2; 800mm-diameter cylindrical core10% enriched uranyl nitrate solution (Contract research)

Onodera, Seiji; Sono, Hiroki; Hirose, Hideyuki; Tanino, Shuichi; Nagasawa, Makoto*; Murakami, Kiyonobu; Sakuraba, Koichi; Miyauchi, Masakatsu; Yamane, Yuichi; Ono, Akio

JAERI-Tech 2000-013, p.57 - 0, 2000/03

JAERI-Tech-2000-013.pdf:2.43MB

no abstracts in English

Current status of criticality safety experiment in NUCEF and its enhancement of facility function toward Pu experiment

Takeshita, Isao; Ono, Akio; Izawa, Naoki*; Miyoshi, Yoshinori; Maeda, Atsushi; Sugikawa, Susumu; Miyauchi, Masakatsu

Proceedings of 6th International Conference on Nuclear Criticality Safety (ICNC '99), p.1512 - 1576, 1999/09

no abstracts in English

Measurement and analysis of the criticality and /l in U-Pu mixed cores

Nakajima, Ken; Suzaki, Takenori;

ICNC 95: 5th Int. Conf. on Nuclear Criticality Safety,Vol. II, 0, p.7.36 - 7.41, 1995/00

no abstracts in English

Critical Experiment on FCA Assembly V-1

; Iijima, Tsutomu; ; ; ; ; ; ; ; ; et al.

JAERI-M 9059, 32 Pages, 1980/09

JAERI-M-9059.pdf:0.9MB

no abstracts in English

Experiment on Blanket Effect on FCA Assemblies V-3-B

; Iijima, Tsutomu; ; ; ; ; ; ; ;

JAERI-M 9057, 25 Pages, 1980/09

JAERI-M-9057.pdf:0.69MB

no abstracts in English

Critical Mass estimation of MCCI products

Tonoike, Kotaro; Okubo, Kiyoshi; Takada, Tomoyuki*

no journal, , 

no abstracts in English