Damage inspection of the first mercury target vessel of JSNS
直江 崇; 勅使河原 誠; 涌井 隆; 木下 秀孝; 粉川 広行; 羽賀 勝洋; 二川 正敏
Naoe, Takashi; Teshigawara, Makoto; Wakui, Takashi; Kinoshita, Hidetaka; Kogawa, Hiroyuki; Haga, Katsuhiro; Futakawa, Masatoshi
A JSNS mercury target vessel composed of type 316L stainless steel suffers radiation damage in the proton and neutron environment. In addition to this damage, the inner wall of the target vessel in contact with mercury is damaged as a result of the cavitation. The target vessel was replaced with a new target in November 2011, because the pneumatic bellows were damaged during the earthquake. Before replacing the target, disk specimens were cut from the beam window of the target vessel in order to investigate the cavitation damage inside the target vessel and to evaluate the change in the mechanical properties due to radiation damage. As a result, it was confirmed that flow-induced erosion damage was not observed on the flow guide. The cavitation damage was concentrated at the center and around both sides approximately 15 mm from the center of the beam window. Based on the detailed measurements, it was concluded that the eroded damage depth of the beam window was 250 $$mu$$m.
使用言語 : English
掲載資料名 : Journal of Nuclear Materials
: 450
: 1-3
ページ数 : p.123 - 129
発行年月 : 2014/07
出版社名 : Elsevier
発表会議名 : 11th International Workshop on Spallation Materials Technology (IWSMT-11)
開催年月 : 2012/11
開催都市 : Ghent
開催国 : Belgium
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キーワード : no keyword
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登録番号 : BB20122629
抄録集掲載番号 : 42001082
論文投稿番号 : 14726
Accesses  (From Jun. 2, 2014)
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