| Budget Amount *help |
¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2019: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
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| Outline of Final Research Achievements |
In this study, the possibility of evaluating irradiation hardening for reactor pressure vessel steels was examined using first-order reversal curve (FORC) method, which can simultaneously evaluate coercivity and interaction field distribution. Using FORC measurement equipment which employs induced voltage method, approximately 150 samples, with variable alloy-irradiation condition, were measured. For almost samples, a pronounced single FORC peak was observed in the two-dimensional FORC diagram and its position and width are found to depend on neutron fluence. By using the FORC method, a morphology of irradiation-induced nanoscale defects may be inspected in addition to an increase of their density.
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