Numerical investigations on the response of the passive containment cooling system and containment under a DELB LOCA scenario

Sui, Yu; Yan, Ming; Wang, Jianjun; Yan, Changqi; Guo, Xueqing

doi:10.1016/j.pnucene.2016.12.011

Cited by 1 publication

(1 citation statement)

References 20 publications

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“…From another point of view, some studies have dealt with the effects of ESFs on mitigation of LOCA consequence inside the containment. Numerical investigations of the response of the passive containment cooling system and containment under a DELB (Double Ended Leg Break) LOCA were performed by Yu et al [14]. Effects of spray on the performance of the hydrogen mitigation system during LB-LOCA was studied by Huang et al in CPR1000 NPP [15].…”

Section: A Specific Type Of Large Break Loss Of Coolant Accident (Lb-mentioning

confidence: 99%

Simulation of hydrogen distribution and effect of Engineering Safety Features (ESFs) on its mitigation in a WWER-1000 containment

et al. 2019

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In this study, thermal-hydraulic parameters inside the containment of WWER-1000/v446 nuclear power plant are simulated in a Double Ended Cold Leg (DECL) accident for short and long times (by using CONTAIN 2.0 and MELCOR 1.8.6 codes) and the effect of the spray system as an Engineering Safety Feature (ESF) on parameters mitigation are analyzed with the former code. Along with the development of the accident from Design Basis Accident (DBA) to Beyond Design Basis Accident (BDBA), the zircaloy-steam reaction becomes the source of in-vessel hydrogen generation. Hydrogen distribution inside the containment is simulated for long time (using CONTAIN and MELCOR) and the effect of recombiners on its mitigation are analyzed (using MELCOR). Thermal-hydraulic parameters and hydrogen distribution profiles are presented as the outcome of the investigation. By activating the spray system, the peak points of pressure and temperature occur in the short time and remain below the maximum design values along the accident time. It is also shown that recombiners have a reliable effect on reducing the hydrogen concentration below flame-propagation limit in the accident localization area. The parameters predicted by CONTAIN and MELCOR are in good agreement with the Final Safety Analysis Report. The noted discrepancies are discussed and explained.

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Section: A Specific Type Of Large Break Loss Of Coolant Accident (Lb-mentioning

confidence: 99%

Simulation of hydrogen distribution and effect of Engineering Safety Features (ESFs) on its mitigation in a WWER-1000 containment

et al. 2019

View full text Add to dashboard Cite

show abstract

Numerical investigations on the response of the passive containment cooling system and containment under a DELB LOCA scenario

Cited by 1 publication

References 20 publications

Simulation of hydrogen distribution and effect of Engineering Safety Features (ESFs) on its mitigation in a WWER-1000 containment

Simulation of hydrogen distribution and effect of Engineering Safety Features (ESFs) on its mitigation in a WWER-1000 containment

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