Recent Developments in ASSERT-PV Code for Subchannel Thermalhydraulics

Abstract

This paper summarises recent development of ASSERT-PY, and provides examples of applications to CANDU fuel bundles in predicting flow, heat transfer and sheath temperatures. The development work is intended to improve computational and phenomenological modelling capabilities of ASSERT-PY in simulating various flow scenarios in CANDU fuel bundles. The latest version of ASSERT-PY can be used for simulations of steady state or transient, subchannel thermalhydraulics in CANDU bundles under conditions up to and including post-dryout heat transfer.