Reactivity estimation based on the linear equation of characteristic time profile of power in subcritical quasi-steady state

Yamane, Yuichi

Journal of Nuclear Science and Technology, 59(11), p.1331 - 1344, 2022/11

https://doi.org/10.1080/00223131.2022.2053221

The reactivity was estimated from a time profile of neutron count rate or a simulated data in a quasi-steady state after sudden change of reactivity or external neutron source strength. The estimation was based on the equation of power in subcritical quasi-steady state. The purpose of the study is to develop the method of timely reactivity estimation from complicated time profile of neutron count rate. The developed method was applied to the data simulating neutron count rate created by using one-point kinetics code, AGNES, and Poisson-distributed random noise and to the transient subcritical experiment data measured by using TRACY. The result shows that the difference of the estimated and reference value was within about 5% or less for ( -1) for simulated data and within about 7% or less for -1.4 and -3.1 for the experimental data. It was also shown that the possibility of the reactivity estimation several ten seconds after the status change.

Evaluation of F-factor for delayed integral counting method

Yamane, Tsuyoshi; Takeuchi, Mitsuo; Shimakawa, Satoshi; Kaneko, Yoshihiko*

Nihon Genshiryoku Gakkai-Shi, 40(2), p.122 - 123, 1998/00

https://doi.org/10.3327/jaesj.40.122

no abstracts in English

Solution of 1-D multi-group time-dependent diffusion equations using the coupled reactors theory

Nagaya, Yasunobu;

Annals of Nuclear Energy, 22(7), p.421 - 440, 1995/00

https://doi.org/10.1016/0306-4549(94)00083-Q

no abstracts in English

SHETEMP: A Computer code for calculation of fuel temperature behavior under reactivity initiated accidents

Araya, Fumimasa;

JAERI-M 91-071, 53 Pages, 1991/05

JAERI-M-91-071.pdf:1.26MB

no abstracts in English