Evaluation of a loss of piping integrity event in the prototype LMFBR "MONJU"; Development of sodium boiling data base

Hayafune, Hiroki; not registered; Sugawara, Satoru

LOF (Loss of flow) transient tests were carried out simulating a LOPI (Loss of Piping Integrity) event in the prototype LMFBR "MONJU" using the PLANDTL (PLANt Dynamics Test Loop) facility in order to accumulate experimental data on thermo-hydraulics in subassemblies with and without sodium boiling under higher heat flux and LOF conditions. In parallel with the experiments, thermo-hydraulic analysis codes of SSC (Super System Code) and SABENA (Subassembly Boiling Evolution Analysis) have been validated through the analysis of above-mentioned LOPI transient experiments. The LOPI transient in prototype LMFBR "MONJU" was analyzed by using validated SSC and SABENA codes. This leads a eonclusion that the previous analysis in the licensing document is conservative from the view point of core cooling.