External reactor vessel cooling

In this paper, a new analytical method is developed from original In-Vessel Melt Retention with the aim of predicting heat load from a two-layer stratified molten pool to VVER1000 lower head wall under Station Black-Out (SBO) accident accompanied with reactor vessel external cooling strategy.

16p visnape 30-01-2023 6 4   Download

In the paper, the Station Blackout accident accompanied with IVR implementation has been analyzed for VVER1000/V320 reactor by using MELCOR code 1.8.6. Four SBO scenarios have been proposed for the study, among, two SBO scenarios with long-term high pressure showed that the failure of lower head occurred early due to high pressure and high temperature causing creep-rupture, and the external cooling only delayed the failure of lower vessel.

15p vidumbledore 06-01-2023 23 2   Download

Severe accident mitigation technology was developed and evaluated for a small integral reactor of SMART. The containment pressure and hydrogen behavior were analyzed using MELCOR computer code (Sandia National Laboratory, 2018) in the SBO (Station Black Out) sequence, which was selected from PSA (Probabilistic Safety Assessment) results for the SMART.

8p vironald 15-12-2022 20 3   Download

"The journal of Nuclear science and technology - Volume 10/Number 2, 2020" present analysis of in-vessel accident progression in VVER1000 NPP during SBO accident with external reactor vessel cooling method; numerical Investigation of Fluid – Structure Interaction (FSI) on Sodium Leakage Accident at Prototype Fast Breeder Reactor Monju; assessment of nitrogen nutrient sources in aquatic environment of Tuyen Lam subcatchment based on it’s stable isotopes ratio (δ15N-NO3) combined with geochemical parameters...

64p trinhthamhodang1218 14-03-2021 16 2   Download

In this study, the MELCOR v1.8.6 code was utilized to perform an analysis of the in-vessel accident progression in VVER1000 reactor during the Station Black-Out (SBO) accident with and without external reactor vessel cooling (ERVC) strategy.

14p trinhthamhodang1218 14-03-2021 11 2   Download

In the present study, several key factors related to molten corium behaviors and thermal characteristics were examined under multi-layered corium formation conditions. Thereafter, systematic finite element analyses and subsequent damage evaluation with varying parameters were performed on a representative reactor pressure vessel (RPV) to figure out the possibility of high temperature induced failures.

11p minhxaminhyeu5 30-06-2019 12 1   Download