Community Research and Development Information Service - CORDIS

Abstract

ONE OF THE MORE SEVERE SCENARIOS FOR THE SINGLE SUBASSEMBLY ACCIDENT IN LMFRS IS THE FORMATION OF A BOTTLED-UP POOL OF FUEL AND STEEL IN THE ASSEMBLY AND ITS SUBSEQUENT DISCHARGE INTO A NEIGHBOUR THROUGH A BREACH IN THE CANWALL. MOST OF THE CALCULATIONS AND EXPERIMENTS TO INVESTIGATE THIS SCENARIO HAVE ASSUMED THAT THE DISCHARGE IS SINGLE-PHASE. RECENT EXPERIMENTAL EVIDENCE FROM SCARABEE SUGGEST THAT THE DISCHARGE WILL MORE LIKELY BE TWO-PHASE. A SERIES OF SIMMER CALCULATIONS HAVE BEEN PERFORMED TO EXAMINE THE MAJOR FEATURES OF A TWO-PHASE FUEL DISCHARGE INTO A ROD BUNDLE. FLASHING IS FOUND TO REDUCE THE MASS FLUX OF THE DISCHARGE; THE VAPOUR SO GENERATED THEN ACCELERATES THE LIQUID IN THE DISCHARGE, RESULTING IN HIGHER MELT VELOCITIES AND PERHAPS LONGER PENETRATION DISTANCES OF THE DISCHARGE INTO THE BUNDLE BEFORE PLUGGING OCCURS AS COMPARED WITH THE SINGLE-PHASE CASE.

Additional information

Authors: JONES A V JRC-ISPRA, JRC-ISPRA
Bibliographic Reference: PAPER PRESENTED: 13TH MEETING OF THE LIQUID METAL BOILING WORKING GROUP, BOURNEMOUTH/UK, SEPT. 27-29, 1988, AVAILABILITY: CEC-LUXEMBOURG, DG XIII/A2, BP 1907, MENTIONING PAPER ORA 34258 E
Availability: Can be ordered online
Record Number: 1989126224400 / Last updated on: 1989-04-01
Category: PUBLICATION
Available languages: en