ICONE23-1789 ABLATION AND MELTING RELOCATION OF HEMISPHERE VESSEL DUE TO NATURAL CONVECTION

• Furuya Masahiro

  Central Research Institute of Electric Power Industry

• Oka Yoshiaki

  Waseda University:(Present office)The University of Tokyo

抄録

In order to investigate ablation failure mode of lower head with molten core during a severe accident of light water reactors, ablation and melting relocation experiments were conducted with a hemisphere vessel with a drain hole. Three different silicone oil were used to investigate an effect of fluid viscosity to simulate a molten core. The hemisphere vessel is molded with lead bismuth eutectic alloy. The vessel wall thinning and melt relocation occurred just below the silicone oil level by ablation due to natural convection. For the lowerviscosity silicone oil, it results in breaking all around the vessel wall. On the contrary for the higher-viscosity silicone oil, the drain hole were ablated as well which enhance drainage flow. The time series of ablated molten wall and silicone oil weights drained from the hole were quantified separately on the basis of measured volume and weight of drained fluids for the code validation.

収録刊行物

• Proceedings of the ... International Conference on Nuclear Engineering. Book of abstracts : ICONE

  Proceedings of the ... International Conference on Nuclear Engineering. Book of abstracts : ICONE 2015.23 (0), _ICONE23-1-_ICONE23-1, 2015

  一般社団法人 日本機械学会

キーワード

• Ablation
• Melting
• Relocation
• Penetration
• Natural convection
• Reactor pressure vessel
• Lower head failure

詳細情報

• CRID: 1390001205880063872
• NII論文ID: 110010046463
• DOI: 10.1299/jsmeicone.2015.23._icone23-1_380
• ISSN: 24242934
• Web Site: https://www.jstage.jst.go.jp/article/jsmeicone/2015.23/0/2015.23__ICONE23-1_380/_pdf
• 本文言語コード: en
• データソース種別:
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  • Crossref
  • CiNii Articles
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