Investigation of countermeasure against local temperature rise in vessel cooling system in loss of core cooling test without nuclear heating
小野 正人; 清水 厚志; 近藤 誠; 島崎 洋祐; 篠原 正憲; 栃尾 大輔; 飯垣 和彦; 中川 繁昭; 高田 昌二; 沢 和弘
Ono, Masato; Shimizu, Atsushi; Kondo, Makoto; Shimazaki, Yosuke; Shinohara, Masanori; Tochio, Daisuke; Iigaki, Kazuhiko; Nakagawa, Shigeaki; Takada, Shoji; Sawa, Kazuhiro
In the loss of forced core cooling test using High Temperature engineering Test Reactor (HTTR), the forced cooling of reactor core is stopped without inserting control rods into the core and cooling by Vessel Cooling System (VCS) to verify safety evaluation codes to investigate the inherent safety of HTGR be secured by natural phenomena to make it possible to design a severe accident free reactor. The VCS passively removes the retained residual heat and the decay heat from the core via the reactor pressure vessel by natural convection and thermal radiation. In the test, the local temperature was supposed to exceed the limit from the viewpoint of long-term use at the uncovered water cooling tube by thermal reflectors in the VCS, although the safety of reactor is kept. Through a cold test, which was carried out by non-nuclear heat input from gas circulators with stopping water flow in the VCS, the local higher temperature position was specified although the temperature was sufficiently lower than the maximum allowable working temperature, and natural circulation of water had insufficient cooling effect on the temperature of water cooling tube below 1$$^{circ}$$C. Then, a new safe and secured procedure for the loss of forced core cooling test was established, which will be carried out soon after the restart of HTTR.
使用言語 : English
掲載資料名 : Journal of Nuclear Engineering and Radiation Science
: 2
: 4
ページ数 : p.044502_1 - 044502_4
発行年月 : 2016/10
出版社名 : ASME
特許データ :
論文URL :
キーワード : HTTR; Vessel Cooling System; LOFC with VCS inactive; Non-nuclear heating test; Safety Demonstration Test
使用施設 :
広報プレスリリース :
受委託・共同研究相手機関 :
登録番号 : AA20150441
抄録集掲載番号 : 44001486
論文投稿番号 : 18157
Accesses  (From Jun. 2, 2014)
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