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Report No.

Feasibility study on construction of Horonobe URL

Shirato, Nobuaki; Ouchi, Kazutoshi; Yamazaki, Shinichi

The Horonobe underground Research Laboratory (URL) programme hosted by sedimentary rocks is aimed to obtain deep geological characteristics of sedimentary rock mass and to confirm the applicability of the investigation methods for the geological environment and the engineering technology for the geological disposal described in the H12 report. In addition, the URL is aimed to have public people experience a deep geological environment in order to understand a deep geological disposal of HLW. Based on the results of the report in H13 the followings are carried out : (i)design of the section of the drifts and shafts (ii)stability analysis of the drifts and shafts considering the anisotropy of initial stress (iii)drawing of the fundamental plan (iv)refuge planning of the URL based on the estimation of gas flow (v)research planning of the second and the third stage of the URL (vi)study on construction method of the drifts and shafts (vii)planning of the facilities during construction and operation (viii)construction schedule analysis and cost estimation of the URL (ix)planning of the facility and guidance of visitors (x)closing planning of the URL This work was re-edited from the results performed by Taisei Corporation, 0bayashi Corporation, Kajima Corporation and Shimizu Corporation under contract with JNC; "Feasibility study on construction of Horonobe URL (JNC TJ1400 2002-003)".



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