Suppression of radon exhalation from soil by covering with clay-mixed soil

被引：21

作者：

Ota, Masakazu

Iida, Takao

Yamazawa, Hiromi

Nagara, Shuichi

Ishimor, Yuu

Sato, Kazuhiko

Tokizawa, Takayuki

机构：

[1] Nagoya Univ, Grad Sch Engn, Dept Energy Engn & Sci, Chikusa Ku, Nagoya, Aichi 4668603, Japan

[2] Japan Atom Energy Agcy, Ningyo Toge Environm Engn Ctr, Okayama 7080698, Japan

来源：

JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY | 2007年 / 44卷 / 05期

关键词：

radon; surface flux; concentration; exhalation; diffusion; soil water content; numerical analysis; clay; uranitun mine;

D O I：

10.3327/jnst.44.791

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The effectiveness of bentonite-mixed soil as a barrier to radon exhalation from soil is investigated experimentally at a closed uranium mine in Japan. Continuous observations of radon flux from a clay-covered soil surface and a bare soil surface were conducted for a period of 80 days. The mean radon flux from the clay-covered plot was one fifth of that from the bare plot, demonstrating that the clay-mixed soil is effective as a boundary suppressing radon exhalation from the contaminated soil. Numerical analyses using a one-dimensional radon transport model for an unsaturated soil for the dry weather conditions confirmed the effectiveness of the clay-mixed soil cover under a range of weather conditions.

引用

页码：791 / 800

页数：10

共 14 条

[1] The radon emanation power of building materials, soils and rocks
Bossew, P
[J]. APPLIED RADIATION AND ISOTOPES, 2003, 59 (5-6) : 389 - 392
[2] DADONG I, 2004, APPL RADIAT ISOTOPES, V60, P971
[3] Evaluation of the effect of a cover layer on radon exhalation from uranium mill tailings:: transient radon flux analysis
Ferry, C
Richon, P
Beneito, A
Robé, MC
[J]. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, 2002, 63 (01) : 49 - 64
[4] IIDA T, 2001, JNCTJ6400 2001008
[5] Radon exhalation rate monitoring in/around the closed uranium mine sites in Japan
Ishimori, Y
Maruo, Y
[J]. HIGH LEVELS OF NATURAL RADIATION AND RADON AREAS: RADIATION DOSE AND HEALTH EFFECTS, 2005, 1276 : 291 - 292
[6] NAKANO M, 1995, PHYS ENV ANAL SOILS, P17
[7] CORRELATIONS FOR PREDICTING AIR PERMEABILITIES AND RN-222 DIFFUSION-COEFFICIENTS OF SOILS
ROGERS, VC
NIELSON, KK
[J]. HEALTH PHYSICS, 1991, 61 (02): : 225 - 230
[8] Improvement of the radon situation at former uranium mining and milling sites in East Germany
Schmidt, P
Regner, J
[J]. HIGH LEVELS OF NATURAL RADIATION AND RADON AREAS: RADIATION DOSE AND HEALTH EFFECTS, 2005, 1276 : 238 - 239
[9] United Nations Scientific Committee on the Effects of Atomic Radiation, 2000, Report of the United Nations Scientific Committee on the Effects of Atomic Radiation to the General Assembly
[10] WILKENING M, 1990, RADON ENV, P59

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