SEASONAL-VARIATION IN THE ACTIVITY CONCENTRATION OF CS-137 IN SWEDISH ROE-DEER AND IN THEIR DAILY INTAKE

被引：33

作者：

KARLEN, G

JOHANSON, KJ

BERGSTROM, R

机构：

[1] Department of Radioecology, The Swedish University of Agricultural Sciences, S-750 07 Uppsala

[2] Research Unit, Swedish Sportsmen's Association, S-750 07 Uppsala

来源：

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY | 1991年 / 14卷 / 02期

关键词：

D O I：

10.1016/0265-931X(91)90070-V

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The seasonal variation of the activity concentration of Cs-137 in roe-deer (Capreolus capreolus) from the central part of Sweden was studied in order to test whether there is a relationship with any variation in the seasonal intake of Cs-137 from different plant species. Muscle samples of roe-deer were collected by local hunters in 1986 (June-September), 1987 and 1988. In 1986, samples were collected in the contaminated regions of central Sweden. In 1987, samples were collected in the Gavle Commune. In 1988, samples were collected from two study areas in central Sweden: Gavle and Harbo. The ground deposition in the Gavle area was 30 000-120 000 Bq m-2, and in the Harbo area 35 000-45 000 Bq m-2. The calculated daily intake of Cs-137 was based on knowledge of the feed composition taking into account the seasonal shift in diet for roe-deer and the activity concentrations of Cs-137 in the most important feed plants. Radiocesium in the plants which typically constitute roe-deer diet has been regularly measured in the Harbo region since the Chernobyl accident. In these plants, there was only a minor variation of Cs-137 content during these years and a mean Cs-137 activity concentration was therefore used in subsequent calculations. An increase in the activity concentration of Cs-137 in roe-deer was observed in August and September of 1986, 1987 and 1988. For example, the activity concentration of Cs-137 seemed to have increased in Gavle in 1988 from levels of 1000-3000 Bq kg-1 during January-July to 11 800 Bq kg-1 in August. The seasonal variation of the activity concentration of Cs-137 in roe-deer observed in Harbo in 1988 was similar to that seen in Gavle in 1988, with pronounced maximum values in August and September. The calculated daily intake of Cs-137 corresponds well to the activity concentrations of Cs-137 in roe-deer, except in April. Intake of fungal species seems to be an important cause of the maximum values of early autumn.

引用

页码：91 / 103

页数：13

共 19 条

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