Key points of disturbances caused by engineering materials used in the phase of repository construction from the viewpoints of long-term system performance

Yamada, Tsutomu; Hiramoto, Masayuki; Kobayashi, Yasushi; Yui, Mikazu; Sato, Haruo; Matsui, Hiroya 

Disturbances caused by construction and operation of the ONKALO (the underground rock characterization facility in Olkiluoto) have been studied by POSIVA in Finland. In this study, engineering and stray materials which might influence the long-term system performance were discussed taking account of the results of POSIVA study and materials to used for the construction of the Horonobe URL, and then summarized for the future stage of repository construction.