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Test results for the surveillance capsule 3L RPV of Zaporozhye NPP power unit No. 2 are presented. Radiation embrittlement coefficients for base and weld metals were obtained from impact bending tests. The critical RPV element as regards radiation embrittlement is shown to be the base metal.
Experimental results for cracked butt weld joints of 09G2 and 12GN2MFAYu steels are evaluated at different ratios of static and dynamic stresses over a wide range of climatic temperatures. The tests were performed on a unit built upon the impact-testing machine. The opening of crack edges was measured with a displacement gauge. The crack propagation was followed with a TV camera and microscope. In...
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