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Information × Registration Number 0206U000459, 0104U009930 , R & D reports Title Evaluation of impact on severe accident risk from operator actions during leak from RF VVER-1000/320 primary circuit and HPIS failure popup.stage_title Head Gromov Gregory, Registration Date 26-01-2006 Organization State Scientific and Technical Center on Nuclear and Radiation Safety popup.description2 Object of investigation-reactor VVER-1000/320. The purpose-analysis of personnel actions of the NPP operations staff with reactor vver-1000/320 under accident control concerned with small LOCAs and failure of the HPIS. Computation analysis were performed using code RELAP (on the example of ZNPP, Unit 5). Were defined an accident peculiarities, identified the operations staff crucial actions and time intervals for diagnostics and accident control. Was conducted the analysis of human actions which perform according to requirements of present EOP and GBDA, and revealed the set of deficiencies in EOP and GBDA that increase the severe accident risk in a case of considered emergency situation. Insights: it is possible to reach a significant reducing of severe accident risks with core damage owing to the accident control increased effectiveness and optimal use of present VVER design technical recources; present emergency operating procedures should be corrected to eliminate thedeficiencies and contradictions. Corrections should be based on the in-depth analyses of emergency processes, human reliability analysis and resylta of trainings using the FSS. Area of application-results of research work may be used by Ukrainian State committee of nuclear safety: for activity related to technical estimation or review the documents which justify the safety of nuclear plants, other. Object of investigation-reactor VVER-1000/320. The purpose-analysis of personnel actions of the NPP operations staff with reactor vver-1000/320 under accident control concerned with small LOCAs and failure of the HPIS. Computation analysis were performed using code RELAP (on the example of ZNPP, Unit 5). Were defined an accident peculiarities, identified the operations staff crucial actions and time intervals for diagnostics and accident control. Was conducted the analysis of human actions which perform according to requirements of present EOP and GBDA, and revealed the set of deficiencies in EOP and GBDA that increase the severe accident risk in a case of considered emergency situation. Insights: it is possible to reach a significant reducing of severe accident risks with core damage owing to the accident control increased effectiveness and optimal use of present VVER design technical recources; present emergency operating procedures should be corrected to eliminate thedeficiencies and contradictions. Corrections should be based on the in-depth analyses of emergency processes, human reliability analysis and resylta of trainings using the FSS. Area of application-results of research work may be used by Ukrainian State committee of nuclear safety: for activity related to technical estimation or review the documents which justify the safety of nuclear plants, other. Product Description popup.authors popup.nrat_date 2020-04-02 Close