| 摘要 |
PROBLEM TO BE SOLVED: To directly inspect a structure without gathering a sample by locally heating a material being subjected to neutron irradiation, and by directly analyzing a small amount of gas being discharged from a heating part for judging the content of He in the material. SOLUTION: A device body 8 is equipped with a water elimination mechanism, an argon gas inflow port, and a discharge port for discharging the mixture of the argon gas and a gas He being generated from a melting part. Heating is made by a high-frequency heating coil, and control is carried out by a current-controlling device 11. A current value is selected to become a temperature of 1,370-1,450 deg.C or more within the melting point range of stainless steel. Then, the relationship between heating time and the volume of the melting part are obtained. The discharge amount of He is divided by melting volume, and the concentration of He is obtained. The device body 8 is positioned in a material 1 to be measured so that the high-frequency heating coil is set to a measurement enforcement place, water in the device 8 is drained, and Ar gas 10 is allowed to flow. A part to be measured is heated by a specific current for specific time and is melted, and He being discharged from the melting part is allowed to flow to a gas analyzer 12 with the Ar gas for performing quantitative analysis.
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