RELAP5/MOD2 Analysis of a Postulated 'Cold Leg SBLOCA' Simultaneous to a 'Total Black-Out' Event in the Jose Cabrera Nuclear Station

摘要

The RELAP5/MOD2/36.04 code has been used on a CYBER 180/830 computer and the simulation includes the 6 inches RHRS charging line, the 2 inch pressurizer spray, and the 1.5 inch CVCS make-up line piping breaks. The assumption of a 'total black-out condition' coincident with the occurrence of the event has been made in order to consider a plant degraded condition with total active failure of ECCS. As a result of the analysis, estimates of the 'time to core overheating startup' as well as an evaluation of alternate operator measures to mitigate the consequences of the event have been obtained. Finally, a proposal for improving the LOCA emergency operating procedure (E-1) has been suggested.