Numerical Estimation of Nuclear Decay Heat from Induced Neutron Fission of 235U and 239Pu

Abstract

In this paper, Joint Evaluated Fission and Fusion (JEFF) Nuclear Data Library has been used to calculate the nuclear decay heat after a fission burst of 235U and 239Pu for shutdown time up to 105 sec. This estimation is based on the numerical solution of the linear differential equations that describe buildups and decays of the fission products. The code was written in MATLAB, which is fast and easy-access platform. The verification of the current code is carried out by comparing the numerical results with the measured reported ones. The discrepancies between the evaluated results and the measured ones show the reliability of the current calculation.