Title:
【発明の名称】原子炉の燃料棒
Document Type and Number:
Japanese Patent JP3065533
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make it possible to avert the instantaneous release of the fission product gases from a lower gas plenum section in spite of the occurrence a failure in the clad pipe in the lower part of a fuel rod, to prevent the formation of a wide range of coolant void regions and to prevent the expansion of fuel failure and the raid increase of reactivity. SOLUTION: The fuel rod 10 is constituted by stacking many fuel pellets 14 in the region of part in the clad pipe 12, hermetically sealing both ends of this clad pipe with an upper end plug 16 and a lower end plug 18 and forming the gas plenum part 20 which is the space for accumulating the fission product gases released from the fuel pellets in the lower part in the clad pipe. The gas plenum part is a double pipe structure composed of an outer clad pipe and an inner sleeve pipe 22. This sleeve pipe has a spacing from the clad pipe and is constituted by closing both top and bottom ends by sleeve end plugs 24a, 24b and disposing plural through-holes 26 of a very small bore on its side wall.
Inventors:
Shinta Ogawa
Shigeo Kasai
Hideyuki Hayashi
Shigeo Kasai
Hideyuki Hayashi
Application Number:
JP11843496A
Publication Date:
July 17, 2000
Filing Date:
April 16, 1996
Export Citation:
Assignee:
Nuclear Fuel Cycle Development Organization
International Classes:
G21C3/16; G21C3/18; (IPC1-7): G21C3/16; G21C3/16; G21C3/18
Domestic Patent References:
| JP6138270A | ||||
| JP7209458A | ||||
| JP5346472A | ||||
| JP5134070A |
Attorney, Agent or Firm:
Jo Shigemi