# Retrans—A program for calculating reactivity transients

## Description

Title of program: RETRANS Catalogue Id: AADB_v1_0 Nature of problem RETRANS is appropriate to calculate power excursions in light water reactors initiated by reactivity insertions due to withdrawal of control elements. The neutron physical model is based, just as in the well-known TWIGL-code, on the time-dependent two-group neutron diffusion equations. The equation of state of the coolant is approximated by a table built into the code. RETRANS solves the heat conduction equation and calculates the heat transfer coefficient for representative fuel rods at each ti ... Versions of this program held in the CPC repository in Mendeley Data AADB_v1_0; RETRANS; 10.1016/0010-4655(86)90166-9 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)