RESEARCH ON SYSTEM STRUCTURE IMPROVEMENT OF HPR1000 SYMPTOM BASED EMERGENCY OPERATING PROCEDURES

抄録

HPR1000’s symptom-based emergency operating procedure (SEOP) system contains optimal recovery procedures and functional recovery procedures, which can independently handle design basis accidents and most superimposed accidents. In order to solve the problem in lack of safety engineer procedure in the HPR1000 symptom-based procedure system and improve the HPR1000 SEOP system, this paper proposes an overall program for the improvement of the SEOP system structure includes extending critical safety function status diagnosis, adding support functional recovery procedures and adding safety engineer procedure. The research of superimposed accident supervision technology was carried out, effective supervision for superimposed accident was achieved after design of ESF status monitoring module, important function failure monitoring module and support system monitoring module. A framework for independent supervision of safety engineer has been established. A preliminary verification of the completeness of conditions coverage and of the effectiveness of independent supervision for improved SEOP system was carried out based on Zhangzhou NPP Unit1/2 design extension conditions (DEC-A), the result of verification shows that the improved SEOP system has distinctive features and can better handle superimposed accident conditions compared with other symptom-based procedure systems at home and abroad.