Published June 20, 1997 | Version v1
Patent Metadata-only

Fuel rod

Creators

Description

The present invention provide a fuel rod used in a BWR type reactor, preventing the occurrence of defects of weld portions and improving the operationability of test and assembling operation to improve the quality of weld portions. Namely, the fuel rod is formed by loading a plurality of fuel pellets in a cladding tube. The outer diameter of a groove portion of a tightly sealing end plug to be inserted and welded to the open end of the cladding tube is made substantially identical with the inner diameter of the cladding tube. A neck portion having a diameter smaller than the outer diameter of the groove portion is disposed between an end plug main body and the groove portion. As a result, since the outer diameter of the groove portion is substantially identical with the inner diameter of the cladding tube, the positioning is facilitated. Since the neck portion having a smaller diameter than the outer diameter of the groove portion is disposed in the groove portion, a gap is formed in the welded portion thereby enabling to facilitate the confirmation of weld sag for confirming integrity of the weld by a non-destructive test. (I.S.)

Availability note (English)

Available from JAPIO. Also available from EPO.

Additional details

Publishing Information

Imprint Pagination
9 p.
IPC:
Int. Cl. G21C21/02; B23K9/00; B23K33/00; G21C3/10.
IPC
Int. Cl. G21C21/02; B23K9/00; B23K33/00; G21C3/10.
Patent number
JP patent document 9-159790/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
28075939
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
BWR TYPE REACTORS; CLADDING; FUEL CANS; FUEL ELEMENTS; FUEL INTEGRITY; FUEL PELLETS; NONDESTRUCTIVE TESTING; SHAPE; WELDED JOINTS; WELDING
Descriptors DEC
DEPOSITION; ENRICHED URANIUM REACTORS; FABRICATION; JOINING; JOINTS; MATERIALS TESTING; POWER REACTORS; REACTOR COMPONENTS; REACTORS; SURFACE COATING; TESTING; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS

Optional Information

Secondary number(s)
JP patent application 7-317699.