METHOD AND DEVICE FOR CORROSION PREVENTION OF WETTING METALLIC MATERIAL

PURPOSE:To prevent the corrosion of the wetting metallic material of a boiling water reactor (BWR) during the shutdown of the BWR by measuring the specific conductivity of the water to be used and controlling the concn. of the dissolved oxygen in the water or the pH thereof from the measured value....

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Bibliographische Detailangaben
Hauptverfasser:	HONDA TAKU, KASHIMURA EIJI, MINATO AKIRA
Format:	Patent
Sprache:	eng
Schlagworte:	AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHINBOILERS BLASTING 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 CONTROLLING WATER LEVEL DIFFUSION TREATMENT OF METALLIC MATERIAL FEED-WATER SUPPLY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MECHANICAL ENGINEERING 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 PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION STEAM GENERATION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To prevent the corrosion of the wetting metallic material of a boiling water reactor (BWR) during the shutdown of the BWR by measuring the specific conductivity of the water to be used and controlling the concn. of the dissolved oxygen in the water or the pH thereof from the measured value. CONSTITUTION:The conductivity of the water is measured by a detector 16 and the concn. of the dissolved oxygen in the water is measured by a dissolved oxygen meter 17 in order to prevent the corrosion of condensate and feed water pipings by the water in the shutdown stage of the BWR plant for the purpose of making a periodic inspection of the BWR10. The oxygen conc. is adjusted by an oxygen feeder 18 so as to attain 40ppb-40ppm when the specific conductivity is