SURFACE TREATMENT METHOD FOR STRUCTURAL MEMBER OF NUCLEAR POWER PLANT, STRUCTURE MEMBER OF NUCLEAR POWER PLANT, NUCLEAR POWER PLANT, ANTI-CORROSIVE MATERIAL INJECTION DEVICE FOR NUCLEAR POWER PLANT, AND SURFACE TREATMENT DEVICE FOR STRUCTURAL MEMBER OF NUCLEAR POWER PLANT

• Main Authors: OTA NOBUYUKI, ITO TAKESHI, WADA YOICHI
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2015
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR POWER PLANT; PHYSICS; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

PROBLEM TO BE SOLVED: To inhibit the occurrence of stress corrosion cracks in a structural member of a nuclear power plant and its progression without performing hydrogen injection into furnace water.SOLUTION: On the surface of a structural member of a nuclear power plant in contact with furnace water of a nuclear reactor, an anti-corrosive material is deposited, wherein the anti-corrosive material shows hydrogen electrode potential and is higher in overvoltage to reduction of oxygen than platinum. Preferably, the anti-corrosive material is gold or a compound comprising gold. 【課題】炉水に水素注入を実施しなくても、原子力プラントの構造部材の応力腐食割れの発生・進展を抑制する。【解決手段】原子炉の炉水と接する原子力プラントの構造部材の表面に、水素電極電位を示しかつ白金よりも酸素の還元に対する過電圧の大きい防食材料を付着させる。防食材料は、金又は金を含む化合物であることが望ましい。【選択図】図６