Demonstration that the electric equipment important to safety can perform the required function in harsh environment during/after design bases accident by the end of life is called _Environmental Qualification”. EQ is regulatory requirement and licensing bases in the US and many countries. In the US regulation, it is required to develop EQ program, EQ component list and to maintain EQ data and records. Also the US NRC has started the EQ program inspection as a first design bases assurance inspection from...
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Status on Environmental Qualification of Electrical Component in Foreign Country

Now, 20% of the world’s nuclear power plants are operating beyond 40 years. By 2020, about 30% of the world’s nuclear fleet will be 40 years old. Long time operation (LTO) of existing plant is a key objective in many countries. We need to understand anticipate and mitigate the degradation in nuclear power plants. IAEA have made the guidelines about long time operation and opened PLIM conference once in 5years.In the United States, industry and NRC/DOE have started research program on the subsequent license ...
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Status of Long time operation in overseas nuclear power plant

Now, 22% of the world’s nuclear power plants are operating beyond 40 years. By 2020, about 30% of the world’s nuclear fleet will be 40 years old. Long time operation (LTO) of existing plant is a key objective in many countries. We need to understand anticipate and mitigate the degradation in nuclear power plants. IAEA have made the guidelines about long time operation and opened PLIM conference once in 5years.In the United States, industry and NRC/DOE have started research program on the subsequent license ...
英字タイトル:
Status of Long time operation in overseas nuclear power plant

１．はじめに米国では、現在104基の商用原子力発電所が稼働中であり、そのうち14基が当初の認可期間の40年を超えて運転中である（図1参照）。40年を超えて運転を継続するための認可手続きがライセンスリニューアル（運転認可更新）である。最初の運転認可更新申請書は1998年に提出され、その後ガイダンスの整備が行われ、審査経験及び新知見を反映しながらこれらのガイダンスを更新し、確立されたプロセスとなってきた。最近では、60年超運転を目指しての取り組みも開始されている。これらの経緯と取り組みを以下に紹介する。図......