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Status and plan of LOCA study at JAEA

原子力機構におけるLOCA研究の現状と計画

成川 隆文 

Narukawa, Takafumi

JAEA has conducted studies on fuel behaviors under loss-of-coolant-accident (LOCA) conditions with both unirradiated and high-burnup advanced fuel cladding tube materials. As a result, various kinds of information have been obtained on behaviors of these cladding tube materials under LOCA conditions: oxidation, ballooning, rupture, thermal shock resistance (fracture/non-fracture conditions), post-LOCA mechanical strength, etc. In addition, new LOCA tests are planned at JAEA for the purpose of investigating effects of phenomena of fuel fragmentation, relocation and dispersal (FFRD) on fuel behaviors and coolability of reactor core during a LOCA. It is expected that these results including those obtained by the future study provide necessary information for future regulation on high-burnup fuels with advanced cladding alloys.

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