METHOD AND DEVICE FOR MATERIAL EVALUATION USING OPTICAL MEASUREMENT

PURPOSE:To evaluate the anticorrosiveness of a material in its use state by measuring a photocurrent which flows by scanning irradiation with a light spot, comparing measured values and evaluating the homogeneity of the material according to the comparison result. CONSTITUTION:Scanning spot light emitted by a light generating device 9 and an optical converging device 17 which are controlled by the remote operation control command device 25 of the evaluating device 7 is passed through an optical cable fiber 17 to irradiate a material piece 15 to be measured which is made of the same material with piping 3 provided to reactor water recirculation system piping 3 coupled with a nuclear reactor pressure container 1 and contacts water as well as the piping 3. The photocurrent flows between the material piece 15 to be tested and a counter electrode 19 and measured by a photocurrent measuring instrument 27 and an arithmetic process compares measured values for respective light scanning irradiation positions to evaluate the homogeneity of the material piece 15 to be tested, so that the evaluation result is displayed on a display device 15. Consequently, the anticorrosiveness, etc., of the reactor water recirculation piping material, etc., of the nuclear reactor pressure container can be evaluated in the use state.