[2H10-17] LLFP Transmutation System

[2H15] Research and development of an innovative transmutation system of LLFP by fast reactors

(6)Evaluation of covariance of cross section of LLFP

*Tsunenori Inakura¹, Naoki Yamano¹, Chikako Ishizuka¹, Satoshi Chiba¹ (1. Tokyo Tech)

Keywords:Fast reactor, Transmutation system, LLFP, Uncertainty evaluation, Bayesian Monte Carlo

Estimation of covariance of the neutron cross sections of the long-lived fission product (LLFP) nuclides is important for the design of an innovative LLFP transmutation system utilizing a fast reactor. Estimation of uncertainty of the cross-section data produces quantitative evaluation of errors of the reactor constants such as nuclear transmutation rate. We estimated the covariances of neutron cross sections of LLFP nuclides (79Se, 93Zr, 99Tc, 107Pd, 129I, and 135Cs) using the nuclear data evaluation code system T6.