The present paper discusses one of the IAEA's Coordinated Research Projects (CRPs). The CRP was started in 2003 to evaluate complex phenomena of primary to secondary leakage (PRISE) accidents for WWER-440 reactors. The first Research Coordination Meeting (RCM), held in March 2003, identified the possible consequences of PRISE accidents (radioactive release to the atmosphere, pressurized thermal shock, boron dilution, loss of integrity of secondary systems and severe accidents) and designated six task groups to evaluate these as well as uncertainties associated with PRISE analyses. The second RCM, held in March 2004, discussed the preliminary results of each task group and addressed the main safety concems related to PRISE phenomena as well as providing recommendations on modelling for PRISE analyses and on operator interventions. The third RCM, held in March 2005, discussed the results of the work performed in 2004. Following completion of the work planned for 2005, it is planned to publish the fmal results ofthe CRP as an IAEA TECDOC. The paper provides a preliminary review of the results ofthe project to date.
Assessment of the potential consequences of large primary to secondary leakage accident for a VVER-440
D'AURIA, FRANCESCO SAVERIO;
2005-01-01
Abstract
The present paper discusses one of the IAEA's Coordinated Research Projects (CRPs). The CRP was started in 2003 to evaluate complex phenomena of primary to secondary leakage (PRISE) accidents for WWER-440 reactors. The first Research Coordination Meeting (RCM), held in March 2003, identified the possible consequences of PRISE accidents (radioactive release to the atmosphere, pressurized thermal shock, boron dilution, loss of integrity of secondary systems and severe accidents) and designated six task groups to evaluate these as well as uncertainties associated with PRISE analyses. The second RCM, held in March 2004, discussed the preliminary results of each task group and addressed the main safety concems related to PRISE phenomena as well as providing recommendations on modelling for PRISE analyses and on operator interventions. The third RCM, held in March 2005, discussed the results of the work performed in 2004. Following completion of the work planned for 2005, it is planned to publish the fmal results ofthe CRP as an IAEA TECDOC. The paper provides a preliminary review of the results ofthe project to date.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
