FILTER FOR REMOVING RADIOACTIVE SUBSTANCE AND FILTER UNIT EMPLOYING THE SAME

Title:

FILTER FOR REMOVING RADIOACTIVE SUBSTANCE AND FILTER UNIT EMPLOYING THE SAME

Document Type and Number:

WIPO Patent Application WO/2006/109595

Kind Code:

A1

Abstract:

A filter which removes organoiodines at a high efficiency and retains a high removal efficiency even after long-term air passing. It is a radioactive-substance-removing filter in which activated carbon fibers are used to collect a slight amount of a radioactive substance present in a gas phase. It is characterized in that the activated carbon fibers have a total acid group amount of 0.2 meq/g or smaller, the activated carbon fibers have at least one chemical substance adherent thereto, and the activated carbon fibers have an equilibrium water adsorption of 10 wt.% or less as measured at a relative humidity of 45%. Also provided is a radioactive-substance-removing filter in which a nonwoven fabric constituted of activated carbon fibers is used to collect a slight amount of a radioactive substance present in a gas phase, characterized in that the activated carbon fibers have an average single-fiber diameter of 25 µm or smaller.

Inventors:

INOUE MAKOTO (JP)
MIYAZAKI ICHIRO (JP)
NOGAWA NORIO (JP)

Application Number:

PCT/JP2006/306872

Publication Date:

October 19, 2006

Filing Date:

March 31, 2006

Export Citation:

Click for automatic bibliography generation Help

Assignee:

TOYO BOSEKI (JP)
WAKAIDA ENGINEERING INC (JP)
UNIV TOKYO (JP)
INOUE MAKOTO (JP)
MIYAZAKI ICHIRO (JP)
NOGAWA NORIO (JP)

International Classes:

G21F9/02; B01J20/20

Foreign References:

JP2004191347A	2004-07-08
JP2004314064A	2004-11-11

Other References: