Shielding calculation by PHITS code during replacement works of startup neutron sources for HTTR operation
篠原 正憲; 石塚 悦男; 島崎 洋祐; 澤畑 洋明
Shinohara, Masanori; Ishitsuka, Etsuo; Shimazaki, Yosuke; Sawahata, Hiroaki
To reduce the neutron exposure dose for workers during the replacement works of the startup neutron sources of the High Temperature Engineering Test Reactor, calculations of the exposure dose in case of temporary neutron shielding at the bottom of fuels handling machine were carried out by the PHITS code. As a result, it is clear that the dose equivalent rate due to neutron radiation can be reduced to about an order of magnitude by setting a temporary neutron shielding at the bottom of shielding cask for the fuel handling machine. In the actual replacement works, by setting temporary neutron shielding, it was achieved that the cumulative equivalent dose of the workers was reduced to 0.3 man mSv which is less than half of cumulative equivalent dose for the previous replacement works; 0.7 man mSv.
使用言語 : Japanese
報告書番号 : JAEA-Technology 2016-033
ページ数 : 65 Pages
発行年月 : 2017/01
特許データ :
論文URL :
キーワード : HTTR; Startup Neutron Source; 252Cf; Shielding Calculation; PHITS Code; Transportation Cask; Fuels Handling Machine
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 : TN20160033
抄録集掲載番号 : 45000104
Accesses  (From Jun. 2, 2014)
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