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

Stress corrosion crack preventing method and plant using the same

Creators

Description

The present invention is suitable to prevent stress corrosion crackings of in-core structures in a BWR plant and a thermoelectric power plant. pH and dissolved oxygen concentration in an aqueous solution are controlled being adjusted with each other within a range satisfying the condition of pH 6-10 and dissolved oxygen concentration of not more than 150ppb to prevent stress corrosion crackings. Specifically, a control device controls pH and dissolved oxygen concentration so as to attain correlation as defined in operation data. A pH control device controls pH by the control signal, and a dissolved oxygen concentration controlling device controls dissolved oxygen concentration by injecting hydrogen into water. (I.S.)

Availability note (English)

Available from JAPIO. Also available from EPO.

Additional details

Publishing Information

Imprint Pagination
8 p.
IPC:
Int. Cl. G21D1/00; G21D3/08; G21F9/12.
IPC
Int. Cl. G21D1/00; G21D3/08; G21F9/12.
Patent number
JP patent document 7-287094/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
27045214
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
BWR TYPE REACTORS; COOLANTS; CORROSION PROTECTION; DISSOLUTION; OXYGEN; PH VALUE; REACTOR COMPONENTS; STRESS CORROSION; WATER CHEMISTRY
Descriptors DEC
CHEMICAL REACTIONS; CHEMISTRY; CORROSION; ELEMENTS; ENRICHED URANIUM REACTORS; NONMETALS; POWER REACTORS; REACTORS; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS

Optional Information

Secondary number(s)
JP patent application 6-81671.