A study of the effectiveness of defense echelon design of ABWR/LMNPP plant for mitigating LOCA accident

Six case studies were performed, which were (1) ECCS is initiated by high drywell pressure signal, (2) ECCS is initiated by low reactor water level signal, (3) ECCS initiation follows the Final Safety Analysis Report (FSAR) condition of Lungmen Nuclear Power Plant (LMNPP), (4) ECCS fails without operators manual action, (5) ECCS fails with operators manual action on HPCF, and (6) ATWS mitigated with ARI, ECCS Initiated by High Dry Well Pressure Signal. The results obtained from the system development process, has contributed additionally towards the research which is conducted at Institute of Nuclear Energy Research (INER) and also benefits all other Instrumentation and Control (I&C) system improvement and development of Taiwan Nuclear Instrumentation and Control Systems.