Published October 31, 1986 | Version v1
Patent Metadata-only

Method of processing spent fuel elements

Creators

Description

Purpose: To improve the integrity of the spent fuel rods. Constitution: After disposing a pressurizing and heating vessel in a fuel pool and placing a spent fuel assembly comprising fuel cladding tubes made of zirconium alloys, water of the inside is discharged. Since the temperature of the cladding tube is increased due to γ-heat generated from pellets and cladding tubes, the temperature is increased to such a level that hydrogen in the cladding tube material is solid-solubilized into zirconium by using an auxiliary temperature controlling device. Then, pressurizing gas is fed into the vessel and pressurized to an identical level with that of the gases in the cladding tube so that no stresses are generated due to pressure difference. Then, elongation at break of the cladding tube embrittled being suffered from neutron damages during use and the integrity can be improved. (Sekiya, K.)

Availability note (English)

Available from JAPIO. Also available from INPADOC.

Additional details

Publishing Information

Imprint Pagination
4 p.
IPC:
Int. Cl. G21C19/33; G21C19/40.
IPC
Int. Cl. G21C19/33; G21C19/40.
Patent number
JP patent document 61-245088/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
18083015
Subject category
S22: GENERAL STUDIES OF NUCLEAR REACTORS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
DUCTILITY; FUEL CANS; HEATING; HYDROGEN; PRESSURIZATION; SPENT FUEL ELEMENTS; ZIRCONIUM ALLOYS
Descriptors DEC
ALLOYS; ELEMENTS; FUEL ELEMENTS; MECHANICAL PROPERTIES; NONMETALS; REACTOR COMPONENTS; TENSILE PROPERTIES

Optional Information

Secondary number(s)
JP patent application 60-86424.