Preventive maintenance method and apparatus for a structural components in a reactor pressure vessel

Disclosed is a water jet peening method that includes the steps of: preparing a water jet peening apparatus (6) having a supporting member (22), a first divider plate (23A), a nozzle support body, and a second divider plate (23B); inserting the water jet peening apparatus (6) into a piping (1) in wh...

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Bibliographische Detailangaben
Hauptverfasser:	Kanno, Akihiro, Murakami, Nobuo, Yoshikubo, Fujio, Soda, Takashi
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CHEMISTRY COMBINED OPERATIONS ENGINEERING ELEMENTS AND UNITS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MACHINE TOOLS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR REACTORS OTHER WORKING OF METAL PERFORMING OPERATIONS PHYSICS PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS
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Beschreibung
Zusammenfassung:	Disclosed is a water jet peening method that includes the steps of: preparing a water jet peening apparatus (6) having a supporting member (22), a first divider plate (23A), a nozzle support body, and a second divider plate (23B); inserting the water jet peening apparatus (6) into a piping (1) in which a structure or electronic device (5) is mounted that is susceptible to damage by a jet of water discharged from a jet nozzle (20) or by shock waves; disposing either the first divider plate (23A) or the second divider plate (23B) between the jet nozzle (20) and the structure or electronic device (5); filling water into an internal area (4) formed in the piping (1) between the first divider plate (23A) and the second divider plate (23B); and subjecting the inner surface of the piping (1) to water jet peening by allowing the jet nozzle (20) to discharge a jet of water into the water in the internal area (4).