Published October 31, 1995 | Version v1
Patent Metadata-only

Forecast method for service life of ceramic structural part and maintenance and inspection method therefor

Creators

Description

An electroconductive circuit having a resistivity of not greater than 1 x 10Ωcm and one or more dimensional orientation is disposed in the vicinity of a surface which constitutes a power plant or a thermonuclear plant. AC current is supplied to the electroconductive circuit, and the surface effect caused by the induction current is adapted to reach the surface layer of the ceramic structural part. When cracks are formed on the surface of the ceramic structural parts, for example, since the distance of the surface effect is changed, the voltage of the electroconductive circuit is changed. Accordingly, the service life of the ceramic structural parts can be forecast by measuring the change of the voltage due to crackings, deformations, temperatures, oxidation and corrosion. In addition, maintenance and inspection for the ceramic structural parts can be conducted at a point when the change of the measured voltage reached a predetermined threshold value. (I.N.)

Availability note (English)

Available from JAPIO. Also available from EPO.

Additional details

Publishing Information

Imprint Pagination
15 p.
IPC:
Int. Cl. G01N27/00; G01N27/20; G21B1/00; G21C17/00.
IPC
Int. Cl. G01N27/00; G01N27/20; G21B1/00; G21C17/00.
Patent number
JP patent document 7-286982/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
27045047
Subject category
S42: ENGINEERING; S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
CERAMICS; CRACKS; ELECTRIC CONDUCTORS; FIRST WALL; LIFETIME; MAINTENANCE; NONDESTRUCTIVE TESTING; NUCLEAR POWER PLANTS; REACTOR COMPONENTS; SURFACES; THERMONUCLEAR POWER PLANTS; TURBINE BLADES
Descriptors DEC
MATERIALS TESTING; NUCLEAR FACILITIES; POWER PLANTS; TESTING; THERMAL POWER PLANTS; THERMONUCLEAR REACTOR WALLS

Optional Information

Secondary number(s)
JP patent application 6-80435.