Qualification of modifications of interfacial shear and wall heat transfer of RELAP5/MOD2/36. 02 during reflooding

Extensive assessment of RELAP5/MOD2/36.02 has been performed by utilizing reflooding experiments performed at the heater rod bundle NEPTUN at the Swiss Federal Institute for Reactor Research and at the FLECHT-SEASET test facility. As a result of this work, a number of modifications were made in the interfacial shear and reflooding wall heat transfer packages of the code, which are reported in this work.