Investigation on sealing technique in geological disposal

Furuichi, Mitsuaki*; Toida, Masaru*; Masumoto, Kazuhiko*

JNC TJ8400 2000-021, 196 Pages, 2000/02

JNC-TJ8400-2000-021.pdf:23.23MB

For the geological disposal of high level radioactive wastes, after placement of tbe wastes, it is necessary to close off (to be called "sealing" hereafter) the underground potential passages (disposal pits, disposal tunnels, main and connecting tunnels and access tunnels) with an effective combination of engineered barriers such as buffers, backfilling materials, plugs and grout. It is necessary to ensure the long-term durability to isolate disposed wastes in the system. The results of the research works this year are as follows; (1)The objectives are to discuss the design of tunnel sealing experiments at URL site. The results of research were about (a)tracer experiment and numerical analysis (b)evaporation measurement (c)presentation at the coordination meeting (2)The discussion was about the equipment of inclined compaction methods and bearing capacity of rock against pressures for the concrete plugs.

Installation of Subsurface Hydrological Monitoring System in Regional Hydrogeological Study

Toyama, Shigeyuki*; Wakamatsu, Hisanori; Okazaki, Hikoya

JNC TJ7440 99-031, 22 Pages, 1999/09

JNC-TJ7440-99-031.pdf:6.36MB

no abstracts in English

Environmental monitoring of tritium around radioactive waste disposal area; Analysis of tritium movement in a forest

Amano, Hikaru

Proc. of the 5th Int. Seminar for Liquid Scintillation Analysis, p.55 - 76, 1993/00

no abstracts in English