落雷残留磁気計測による雷撃ルート特定のための調査活動
Activities to specify the root of lightning impulse current with detecting the remained magnetic field
著者:
佐藤 正史 Masashi SATO 河野 亮 Akira KAWANO 河野 瑞穂 Mizuho KONO 笹田 一郎 Ichirou SASADA 加呂 光 Hikaru KARO 佐藤 秀隆 Hidetaka SATO
発刊日:
公開日:
gradiometerlightning impulse currentmagnetic filed detecting systemsvector quantity
概要
In order to prevent the important facility from the influence of lightning, it is very effective to apply not only the adequate design of lightning impulse current resistance, but also additional countermeasures for lightning impulse current based upon the experience and information during the commission of each facilities. Especially when the facility was attacked by lightning , it is very important to get hold the roots of this lightning impulse current promptly. August 2nd of 2015, we experienced the loss of function of many instruments simultaneously which were categorized as the group of safety function at the site of Rokkasho Reprocessing Plant. We evaluated this cause as the influence of lightning impulse current, so for the purpose to specify this impact root , we applied the supersensitive magnetic field detecting system as called gradiometer and tried to confirm the magnetized state as a vector quantity which were remained and recorded in the ground and the steel constructures. We introduce and report these activities to specify the root of lightning impulse current with this gradiometer as follows.
