CS-137 FALLOUT DEPTH DISTRIBUTIONS IN FOREST VERSUS FIELD SITES - IMPLICATIONS FOR EXTERNAL GAMMA-DOSE RATES

被引：56

作者：

MILLER, KM

KUIPER, JL

HELFER, IK

机构：

[1] Environmental Measurements Laboratory, US Department of Energy, New York, NY 10014-3621

来源：

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY | 1990年 / 12卷 / 01期

关键词：

D O I：

10.1016/0265-931X(90)90034-S

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The depth profile of 137Cs fallout in soil from atmospheric nuclear weapons tests was measured at neighboring field and forest areas for seven sites in the northeastern US. The inferred dose rates in air at 1 m above the ground per unit inventory of 137Cs averaged a factor of 1·8 higher in the forest as compared to the field areas. Calculations indicate that the dose rate in forest areas would be a factor of four higher than that over deeply plowed land. Based on a limited set of historical measurements made since 1972, it appears that the dose rate per unit inventory in both field and forest areas has more or less stabilized after a sharp decrease following deposition events in the early 1960s. Estimated dose commitments for various land types are compared to the value suggested by the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) and the implications with respect to certain population groups are discussed. The findings may have application in estimating future external doses from deposited 137Cs associated with Chernobyl fallout in Europe. © 1990.

引用

页码：23 / 47

页数：25

共 29 条

[1]

Adriano, Hoyt, Pinder, Fallout of cesium-137 on a forest ecosystem in the vicinity of a nuclear fuel reprocessing plant, Health Phys., 40, pp. 369-376, (1981)

[2]

Alexander, Depth of penetration of the radioisotopes strontium-90 and cesium-137, Environmental quarterly, pp. 116-121, (1967)

[3]

Bachhuber, Bunzl, Schimmack, The migration of 137Cs and 90Sr in multilayered soils: Results from batch, column, and fallout investigations, Nucl. Technol., 59, pp. 291-301, (1982)

[4]

Beck, Environmental gamma radiation from deposited fission products, 1960–1964, Health Phys., 12, pp. 313-322, (1966)

[5]

Beck, Exposure rate conversion factors for radionuclides deposited on the ground, US Department of Energy Report EML-378, (1980)

[6]

Beck, de Planque, The radiation field in air due to distributed gamma-ray sources in the ground, US Atomic Energy Commission Report HASL-195, (1968)

[7]

Beck, Krey, Cesium-137 inventories in undisturbed Utah soils—Interim report on radionuclides in soils of populated areas, US Department of Energy Report EML-375, (1980)

[8]

Boone, Kantelo, Mayer, Palms, Residence half-times of 129I in undisturbed surface soils based on measured soil concentration profiles, Health Phys., 48, pp. 401-413, (1985)

[9]

Carbol, Ittner, Skalberg, Radionuclide deposition and migration of the Chernobyl fallout in Sweden, Radiochimica Acta, 44-45, pp. 207-212, (1988)

[10]

Gogolak, Winkelman, Weimer, Wolff, Klopfer, Observations of Chernobyl fallout in Germany by in situ gamma-ray spectrometry, A compendium of the Environmental Measurements Laboratory's research projects related to the Chernobyl nuclear accident, pp. 244-258, (1986)

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