After the Fukushima Accident there is a worldwide strategy to develop the Defense in Depth strategy to mitigate the Severe Accidents. This effort has long tradition for new designs of NPPs. However the existing NPPs are lacking such a systematic approach. For the VVER 440 type NPP family the concept of the IN Vessel Strategy was adopted many years ago for the Loviisa NPP in Finland. However the VVER 1000/320 Units are lacking final treatment with the Severe Accidents. Effort of our research is to prepare the analytical and experimental proof to justify this concept for higher power VVER type NPPs.
The IN Vessel Retention Strategy to Mitigate the Severe Accidents for the VVER 1000/320 Type NPPs
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Zdarek, J. "The IN Vessel Retention Strategy to Mitigate the Severe Accidents for the VVER 1000/320 Type NPPs." Proceedings of the ASME 2013 Pressure Vessels and Piping Conference. Volume 4: Fluid-Structure Interaction. Paris, France. July 14–18, 2013. V004T04A064. ASME. https://doi.org/10.1115/PVP2013-97082
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