DNBR CALCULATION IN CORE DURING COOLANT PUMP ROTOR SEIZURE ACCIDENT FOR QINSHAN NUCLEAR POWER PLANE

DNBR of the hot fuel assembly in core is calculated by use of the subchannel analysis code THAS-PC1 for the coolant pump rotor seizure accident. The results show that DNBR calculated by W--3,BAW--2 and CONDIE correlations agree with the values of CHF table. They reach the minimum DNBRwhen the transient time is equal to 2 seconds, and the minimum DNBR fall below limiting value 1.3.The DNBR calculated by BIASI correlation is much higher and far greater than the limit value 1.3.