Geosystem pollution by radioactive strontium near a regional radioactive waste repository
| Autor: | G. V. Lavrentyeva, B. I. Synzynys, I. I. Silin |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Hydrology
Pollution education.field_of_study Strontium Risk level media_common.quotation_subject Population Radioactive waste chemistry.chemical_element Sorption 010403 inorganic & nuclear chemistry 01 natural sciences 030218 nuclear medicine & medical imaging 0104 chemical sciences 03 medical and health sciences 0302 clinical medicine chemistry Soil horizon education Geology Groundwater Water Science and Technology media_common |
| Zdroj: | Water Resources. 43:948-956 |
| ISSN: | 1608-344X 0097-8078 |
| DOI: | 10.1134/s0097807816070071 |
| Popis: | Radioecological studies were carried out in a territory polluted by 90Sr delivered by groundwater after leakage from a tank in a near-surface radioactive waste repository. The layer-by-layer vertical distribution of 90Sr in soil down to 3 m is analyzed. The area of radioactive pollution above the minimal significant activity level (1 Bq/kg by NRB-99/2009) in the examined soil layers decrease with depth as follows: 1808 m2 at 0–5 cm, 302 m2 at 5–10 cm, and 181 m2 at 10–15 cm. The accumulation of 90Sr takes place at a natural sorption geochemical barrier—a swampy area in a near-terrace depression. The radiation dozes were calculated for terrestrial mollusk of Bradybaena fruticum, accumulating strontium in its shell; the doses are in excess of the screening value of 2.4 μGr/day in 41% of the territory. This is higher than the acceptable risk level (5%) for this mollusk population. An excess of the intervention level for 90Sr was recorded in both subsurface and surface waters in this geosystem during winter and summer dry seasons and autumn showers. |
| Databáze: | OpenAIRE |
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