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AbstractAbstract
[en] FRAMATOME Shot-peening process was developed when it appeared that PWSCC of M.A. INCONEL 600 in roll transition areas could be an important source of tubing degradation. To be sure to have a qualified process as soon as possible FRAMATOME and EdF set up a task force which had to consider all the remedial measures against PWSCC available in the short or the long term. FRAMATOME concentrated on Shot-peening. This paper presents the work on shot-peening. The tests performed included corrosion tests in media such as MgCl2, 10% Caustic at high temperature and direct stress measurements such as X rays and strain gauges techniques. This presentation concentrates on the effort which was devoted to establish the effect of shot-peening on precracked tubes and the amount of margins for this process. After the results of all the tests demonstrated the efficiency of this process, shot-peening was applied in France first on a small scale, 300 tubes in BUGEY 5 in August and then on the 3 Steam Generators of GRAVELINES 3 and DAMPIERRE 3 in September, October and November of 1985. The experience gained from these industrial operations (and of the DOEL 3 operation) allowed to progressively implement improvements in the tooling, process and personnel training. This resulted in a very significant decrease of time of operation, dose and bead consumption. These features are detailed in this paper and the French program scheduled in 1986 is presented. 2 refs
Primary Subject
Source
Dec 1985; 20 p; Workshop on primary side SCC remedial action NDE methods; Leningrad (USSR); 10-12 Dec 1985
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
ALKALI METAL COMPOUNDS, ALKALINE EARTH METAL COMPOUNDS, ALLOYS, ALUMINIUM ADDITIONS, BOILERS, CHEMICAL REACTIONS, CHLORIDES, CHLORINE COMPOUNDS, CHROMIUM ALLOYS, COLD WORKING, CORROSION, CORROSION RESISTANT ALLOYS, DEVELOPED COUNTRIES, ENRICHED URANIUM REACTORS, EUROPE, FABRICATION, HALIDES, HALOGEN COMPOUNDS, HEAT RESISTING ALLOYS, HYDROGEN COMPOUNDS, HYDROXIDES, INCONEL ALLOYS, IRON ALLOYS, MAGNESIUM COMPOUNDS, MATERIALS WORKING, NICKEL ALLOYS, NICKEL BASE ALLOYS, NIMONIC, NUCLEAR FACILITIES, OXYGEN COMPOUNDS, POWER PLANTS, POWER REACTORS, REACTORS, SODIUM COMPOUNDS, SURFACE TREATMENTS, TESTING, THERMAL POWER PLANTS, THERMAL REACTORS, TITANIUM ADDITIONS, VAPOR GENERATORS, WATER COOLED REACTORS, WATER MODERATED REACTORS
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