Restoration work for obstacle and upper core structure in reactor vessel of experimental fast reactor Joyo

Sekine, Takashi ; Ashida, Takashi ; Imaizumi, Kazuyuki ; Takamatsu, Misao ; Nagai, Akinori; Maeda, Yukimoto

Restoration works for restart of the experimental fast reactor Joyo need to retrieve the bent irradiation test subassembly (MARICO-2) left in the in-vessel storage rack and replace the damaged upper core structure (UCS). In-vessel visual observations using radiation resistant fiberscopes and cameras were conducted to investigate the MARICO-2 and the MARICO-2 was temporarily lifted to confirm the condition. The in-vessel ray dose rate was measured to evaluate the activation of the UCS which will be reflected to optimize the shielding design of a UCS replacement cask and a MARICO-2 handling tool.

Language	:	English
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Meeting title	:	International Conference on Fast Reactors and Related Fuel Cycles (FR 2009)
Held date	:	2009/12
Location (city)	:	Kyoto
Location (country)	:	Japan
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Keywords	:	no keyword
Research Facility	:	常陽(高速増殖炉実験炉)
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Registration No. : BB20092772
JAEA Abstracts No. :
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