METHOD OF EXECUTING WATER JET PEENING

PROBLEM TO BE SOLVED: To provide a method of executing water jet peening capable of shortening a time required for executing water jet peening.SOLUTION: A top head 18 forming a top head is provided with a plurality of control rod drive mechanism (CRDM) penetration pipes 19 arranged in a square grid-...

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Bibliographische Detailangaben
Hauptverfasser:	YOSHIKUBO FUJIO, SUGANO AKIHIRO, AOKI TAKAHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL CHEMISTRY COMBINED OPERATIONS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GRINDING MACHINE TOOLS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR POWER PLANT NUCLEAR REACTORS OTHER WORKING OF METAL PERFORMING OPERATIONS PHYSICS POLISHING TRANSPORTING UNIVERSAL MACHINE TOOLS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method of executing water jet peening capable of shortening a time required for executing water jet peening.SOLUTION: A top head 18 forming a top head is provided with a plurality of control rod drive mechanism (CRDM) penetration pipes 19 arranged in a square grid-like pattern. The CRDM penetration pipes 19 are joined with one another by a tube support 20 member disposed among them. The top head 18 is placed on a tank 17 and water 31 is filled in an inner region 42 of the tank 17 and the top head 18. A travel apparatus 8 moves a nozzle lifting/lowering apparatus 5 to a predetermined location and a lifting/lowering mechanism 4 is operated to lift a jet nozzle 1 above the tube support member 20 in the neighboring four CRDM penetration pipes 19. An ejection outlet of the jet nozzle 1 is directed to a weld between one of the CRDM penetration pipes 19 and the top head 18, and a water jet is ejected to start WJP. A nozzle turning mechanism 3 turns the jet nozzle 1, and WJP is executed sequentially to the four CRDM penetration pipes.