A Simple and Fast Calculation Method for CANDU Decay Heat Power

Abstract

A method for a simple and fast calculation of CANDU bundle specific decay powers has been developed by employing the Alternating Conditional Expectation (ACE) algorithm. The data samples are generated by performing ORIGEN-S runs. The decay heat power equation developed by such a method is much simpler than that presented in the ANSI/ANS-5.1-2005 standard. And through its application in decay heat power calculations of a CANDU6 reactor, it has been demonstrated that the results agree well with those provided by the ORIGEN-S code which is considered to be one of the most accurate methods for reactor decay heat powers.