| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10128878 | Annals of Nuclear Energy | 2018 | 17 Pages |
Abstract
The simulations show, that mobile pump injection significantly reduces the amount of the released fission products and hydrogen, if it is started within 75â¯min after the core exit temperature (CET) exceeded 400â¯Â°C. Without PSD, melting of the fuel can be prevented if the mobile pump is started immediately when CET >â¯650â¯Â°C, but release of fission products can only be prevented if early pump injection is combined with PSD. Cases with a delay of mobile pump injection in combination with a delay of PSD (e.g. due to temporary malfunction) are also investigated: until 50â¯min after CET >â¯400â¯Â°C a lower release of fission products and longer grace times to prevent melt relocation to the lower head are observed (compared to immediate PSD at CET >â¯400â¯Â°C).
Keywords
ECCSAMGHPISLPISCold legHot legLower headPWRSBLOCAAMMECCSEoPMCPPSDLocaMPIGRsRCSACCURPVCETAccumulatorLoss-of-Coolant Accidentsevere accident management guidelinescore exit temperaturePressurized Water ReactorEmergency operating procedureHigh Pressure Injection SystemLow Pressure Injection SystemEmergency Core Cooling SystemFission productReactor pressure vesselMain Coolant PumpDiesel generator
Related Topics
Physical Sciences and Engineering
Energy
Energy Engineering and Power Technology
Authors
M. Jobst, P. Wilhelm, Y. Kozmenkov, S. Kliem,