Published December 27, 1985 | Version v1
Patent Metadata-only

Upper lattice plate

Creators

Description

Purpose: To prevent the degradation of a channel box due to fretting corrosion or galvanic corrosion at the contact faces between the upper lattice plate and the channel box. Constitution: Taking notice of the fact that the fretting corrosion and the galvanic corrosion are generated due to the difference in the hardness and the electrochemical properties between different kinds of metals such as SUS 304 stainless steels and zircaloy-4, those portions of the channel box and the upper lattice plate in contact with each other are made of zirconium or zirconium alloy. Specifically, (1) coating layers of zirconium or zirconium alloy are disposed to the surface of the upper lattice plate, (2) the upper lattice plate itself is made of zirconium or zirconium alloy or (3) a lattice plate protector made of zirconium or zirconium alloy is disposed to the contact portions with the channel box. (Kawakami, Y.)

Availability note (English)

Available from JAPIO. Also available from INPADOC.

Additional details

Publishing Information

Imprint Pagination
5 p.
IPC:
Int. Cl. G21C3/30; C23F13/00; C23F15/00; G21C5/06.
IPC
Int. Cl. G21C3/30; C23F13/00; C23F15/00; G21C5/06.
Patent number
JP patent document 60-263888/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
17083182
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
BWR TYPE REACTORS; ELECTROCHEMICAL CORROSION; FRETTING CORROSION; FUEL ASSEMBLIES; HARDNESS; PLATES; REACTOR LATTICES; SUPPORTS; ZIRCALOY; ZIRCONIUM
Descriptors DEC
ALLOYS; CHEMICAL REACTIONS; CORROSION; ELEMENTS; ENRICHED URANIUM REACTORS; MECHANICAL PROPERTIES; MECHANICAL STRUCTURES; METALS; POWER REACTORS; REACTORS; THERMAL REACTORS; TRANSITION ELEMENTS; WATER COOLED REACTORS; WATER MODERATED REACTORS; ZIRCONIUM ALLOYS; ZIRCONIUM BASE ALLOYS

Optional Information

Secondary number(s)
JP patent application 59-119018.