Test method has not been maintained for late-expansive aggregates (which cause cracks in concrete after 10 years or more), in addition to the early-expansive aggregates which have been considered as the major cause of ASR in Japan. In order to confirm the effectiveness of the aggregate test method of JNES flow (the method mainly composed of international methods RILEM AAR - 3 and AAR - 4) and to prepare applicable aggregate test method, we conducted comparative tests using domestic and foreign aggregate...
英字タイトル:
Evaluation on Aggregate Testing Method for ASR Potential Evaluation

An elemental factor on the crack propagation mechanism of SCC observed in LWRs component materials made of non-sensitization stainless steels is examined with respect to the local steam corrosion in cracks by atomic oxygen formed at the wall surface under the irradiation of γray. The excellent oxidation resistance of type 25Cr-35Ni EHP steel with forming the protective double layer oxides is observed up to 600℃. On the other hand, the oxidation of type 316L steel with non-protective single oxide is acc...
英字タイトル:
Environmental compatibility evaluation of extra high purity stainless steel (EHP alloy)

A roadmap on safety research and human resource cultivation for Light-Water Reactor (LWR) has been developed by a lot of stakeholders, that is experts of government, academia and industry in the committee of Atomic Energy Society of Japan since 2014. In the roadmap, technical, social and policy issues are covered and the issues are categorized into several research fields, e.g. _Design”, _Operation and Maintenance”, _Accident Management”, _Decommissioning”, _Nuclear Security” and so on. A lot of stakeho...
英字タイトル:
Trial for Advanced Application of LWR Safety Roadmap