SUBCOOLED-BLOWDOWN FORCES ON REACTOR-SYSTEM COMPONENTS:CALCULATIONAL METHOD AND EXPERIMENTAL CONFIRMATION

摘要

The loss-of-coolant accident (LOCA) can make structural demands on a nuclear power reactor system beyond normal requirements. Reliable pre¬dictions of the significant transient hydraulic loads are needed for the develop¬ment of mechanical designs which will ensure coolability of the reactor core, even after such an accident.nThe preceeding two spatial integrals are two terms in the conservation-of-momentum equation. With one-dimensional subcooled-blowdown digital com¬puter programs such as BURST (Blowdown Under a Rapid Sonic Transient) and WHAM (Water HAMmer), the calculation of the transient hydraulic force on a coolant loop component during blowdown is accomplished more easily and through only one spatial integration by evaluating the remaining terms in the momentum equation.