Temperature distribution around a plutonium spot in the ATR fuel pin
- 1. Power Reactor and Nuclear Fuel Development Corp., Tokyo (Japan)
Description
The behavior of mixed oxide fuel (PuO2 - UO2) in accidental power excursion is important for the safety of thermal reactors. In ATR (Advanced Thermal Reactor), the thermal effect of a PuO2 spot on cladding must be taken into consideration to ensure the integrity of fuel pins. This effect becomes maximum when the spot exists on the periphery of a fuel pellet adjacent to cladding. Calculation of temperature distribution was made by the iteration method. For the PuO2 spot, its hemisphere is taken, which exists on the periphery of a pellet with the flat face facing the inner wall of cladding. It was found that the existence of a PuO2 spot has large influence on the region near the inner surface of cladding as compared with the outer surface. With zircaloy-2 cladding, 300 μm may be the maximum permissible radius of the PuO2 hemisphere for maintaining the integrity of pins under calculated conditions. (Mori, K.)
Additional details
Publishing Information
- Imprint Title
- Semi-annual progress report of Power Reactor and Nuclear Fuel Development Corporation, Tokai Works
- Imprint Pagination
- p. 40-47.
- Report number
- PNCT--831-74-01
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 7245043
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Progress Report
- Descriptors DEI
- FUEL CANS; FUEL PINS; HIGH TEMPERATURE; HOT SPOTS; PARTICLE SIZE; PLUTONIUM OXIDES; POWER DENSITY; SPATIAL DISTRIBUTION; THERMAL CONDUCTION; THERMAL STRESSES; YIELD STRENGTH; ZIRCALOY 2
- Descriptors DEC
- ACTINIDE COMPOUNDS; ALLOYS; CHALCOGENIDES; CHROMIUM ADDITIONS; DISTRIBUTION; ENERGY TRANSFER; FUEL ELEMENTS; HEAT TRANSFER; IRON ADDITIONS; MECHANICAL PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PLUTONIUM COMPOUNDS; REACTOR COMPONENTS; SIZE; STRESSES; TIN ALLOYS; TRANSITION ELEMENT ALLOYS; TRANSURANIUM COMPOUNDS; ZIRCALOY; ZIRCONIUM ALLOYS; ZIRCONIUM BASE ALLOYS