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幌延深地層研究センター350m調査坑道における地下水の地球化学モニタリング装置による地下水圧の連続観測結果(2016$$sim$$2018年度)

Groundwater pressure records by geochemical monitoring system in the 350 m gallery of the Horonobe Underground Research Laboratory (FY 2016-2018)

望月 陽人; 宮川 和也 ; 笹本 広

Mochizuki, Akihito; Miyakawa, Kazuya; Sasamoto, Hiroshi

幌延深地層研究センターでは、地層科学研究の一環として、地下施設内の調査坑道に設置された地下水の地球化学モニタリング装置を用い、岩盤中地下水の水圧・水質変化を継続的に観測している。本報告は、350m調査坑道に設置された地下水の地球化学モニタリング装置を利用して、2016年度$$sim$$2018年度の3年間に取得した地下水圧の観測結果を取りまとめたものである。

Japan Atomic Energy Agency (JAEA) has been conducting "geoscientific study" and "research and development on geological disposal" in the Horonobe Underground Research Laboratory (URL) for safe geological disposal of high-level radioactive waste. Groundwater pressure and geochemical parameters such as pH and oxidation-reduction potential in the deep groundwater have been continuously monitored with monitoring systems which were developed in the Horonobe URL Project. This report presents the data of groundwater pressure which have been obtained by the monitoring systems installed at the 350 m gallery. The data obtained from April 1, 2016 until March 31, 2019 was summarized along with related information such as the specifications of boreholes and the excavation of the URL.

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