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JAEA Reports

Report of Working Group for Technical Standard of Cutting and Melting Works in Glovebox Dismantling

Asazuma, Shinichiro; Takeda, Shinso; Toshihiko, Ohnishi,; Soma, Susumu; Onose, Ken ; Shoichi, Tajima,; Okada, Takashi

JNC TN8420 2004-001, 122 Pages, 2004/11

JNC-TN8420-2004-001.pdf:167.0MB

In order to prevent spread of contamination, glovebox dismantling activity is usually performed in a confined enclosure with personal radioactive protective equipment. Since large potion of these materials is made of vinyl acetate, there exist potential risks of fire, damage and injury to the environment and workers during the dismantling (cutting or melting) operation. It is therefore important to establish standard for proper use of equipment and hazard controls in such a specific environment. Working Group composed of Tokai Works and O-arai Works has examined and developed the operational standard for cutting work in glovebox dismantlement. The result is reflected to the Tokai Works Safety Operational Standard.

Journal Articles

Influence of Fault on the Anisotropy of Pore Structure and Permeability in Granite, Tono Area, Central Japan

; Uehara, Shinichi*; *; *

American Geophysical Union 2002 Fall Meeting, p.F1371 - F1372, 2002/12

The effect of micro-cracks on the transport properties of granite is studied using laser scanning microscope. 3D images of pore structure show the influence on the porosity and permeability. Anisotropy of micro-cracks are observed on two different directions in respect to the main structure. Results on permeability show a decreases by a factor of one to two order of magnitude in the direction parallel to the fault zone. In the conference will be discussed the implications of anisotropy of micro-cracks on the transport properties in crystalline rocks.

Journal Articles