Code Development in Coupled PARCSRELAP5 for Supercritical Water Reactor

Abstract EN

The new capability is added to the existing coupled code package PARCS/RELAP5, in order to analyze SCWR design under supercritical pressure with the separated water coolant and moderator channels.

This expansion is carried out on both codes.

In PARCS, modification is focused on extending the water property tables to supercritical pressure, modifying the variable mapping input file and related code module for processing thermal-hydraulic information from separated coolant/moderator channels, and modifying neutronics feedback module to deal with the separated coolant/moderator channels.

In RELAP5, modification is focused on incorporating more accurate water properties near SCWR operation/transient pressure and temperature in the code.

Confirming tests of the modifications is presented and the major analyzing results from the extended codes package are summarized.