Effect of uncertainty in nuclear constants on nuclear characteristics sensitivity analysis of nuclear constants for the core of Monju reactor

None

Yamamoto, Masaaki*; Maki, Koichi*; Zukeran, Atsushi*

Yamamoto, Masaaki*; Maki, Koichi*; Zukeran, Atsushi*

None

Sensitivity analysis of nuclear constants for MONJU nuclear characteristics was performed. In this analysis, the sensitivity coefficients for each nuclear constant were calculated. From these results, the degree of the necessity for the further evaluation of each nuclear constant has been discussed. Main results are; (1) Sensitivity Coefficients Nuclear constants having a large sensitivity coefficient are as follows. (a) For effective multiplication factor, andf of 239Pu,andf of 238U ( 1.4 MeV), and f of 241Pu (400-10 KeV) have positive values. f of 238U (1.4 Mev 10 KeV) and f of Fe (100-10 KeV) have negative values. Among them, especially and f of 239Pu have large values. (b) For breeding ratio, of 239Pu (1.4 MeV 10 KeV), of 238U ( 1.4 MeV), of 240Pu(400-10 KeV) and c of 238U (400-10 KeV) has positive value. C of 239Pu(400-10KeV) have a negative value. Among them, of each fuel element has especially large values. (c) For Na-void reactivity (100% void ratio), and f of 239Pu, f of 239Pu ( -10 KeV), and f of