干旱区生态环境知识资源中心(Arid): Dose assessment for sheep exposed to fallout from nuclear test Nancy

Arid

DOI	10.2172/6728891
报告编号	PNL-4278
来源ID	OSTI_ID: 6728891
	Dose assessment for sheep exposed to fallout from nuclear test Nancy
	Sasser, L.B.; Soldat, J.K.; Kennedy, W.E. Jr.; Murphy, D.W.
英文摘要	Radiation doses were estimated for sheep wintering on Nevada ranges during the testing at the Nevada Test Site of the nuclear weapon Nancy on March 24, 1953. Exposure pathways considered were inhalation of radionuclides from both cloud passage and resuspension, external exposure of the total body and skin, and ingestion of contaminated forage and soil. Physiological, metabolic, and dosimetric data needed for these calculations were obtained from data appropriate for the sheep. Dose rate and radionuclide deposition values for shot Nancy were used. Radionuclide deposition and retention on the desert vegetation were obtained from data collected during several nuclear tests at the Nevada Test Site. Existing dosimetric computer programs, whose libraries were modified to include the sheep data, and specially developed models were used to estimate the dose commitment for the sheep. The total-body dose for reference sheep located within the 40-mR/hr (H+12) isopleth from all modes of exposure was estimated to be 2.6 rad. Ingestion of fallout on edible vegetation contributed the majority of the dose, whereas inhalation of radionuclides and consumption of contaminated soil from the ground contributed little to the internal doses. The dose to the thyroid of ewes from radioiodine and other radionuclides reaching the thyroid was approximately 400 rad. The calculated uniform dose to the reticulo-rumen was 4 rad; however, if fallout particles were assumed to concentrate in the ventral rumen, a localized dose of 200 rad could have been received by the rumen wall. Estimated dose to the bare skin of ewes was 120 rad. The dose to the fetal thyroid from radioiodine ingested by a pregnant ewe grazing at a location where the dose rate was 40 mR/hr (H+12) was estimated to be 700 rad, or approximately twice the dose to the maternal thyroid.
出版年	1982
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	54 ENVIRONMENTAL SCIENCES ; IODINE 131 ; UPTAKE ; SHEEP ; RADIATION DOSES ; BIOLOGICAL PATHWAYS ; DATA ANALYSIS ; DOSE RATES ; ENVIRONMENTAL EFFECTS ; ENVIRONMENTAL EXPOSURE PATHWAY ; EXPERIMENTAL DATA ; FALLOUT ; FETUSES ; INGESTION ; INHALATION ; METABOLISM ; NEVADA TEST SITE ; NUCLEAR EXPLOSIONS ; NUCLEAR WEAPONS ; PLANTS ; STOMACH ; THYROID ; ANIMALS ; BETA DECAY RADIOISOTOPES ; BETA-MINUS DECAY RADIOISOTOPES ; BODY ; DATA ; DAYS LIVING RADIOISOTOPES ; DIGESTIVE SYSTEM ; DOMESTIC ANIMALS ; DOSES ; ENDOCRINE GLANDS ; EXPLOSIONS ; GASTROINTESTINAL TRACT ; GLANDS ; INFORMATION ; INTAKE ; INTERMEDIATE MASS NUCLEI ; IODINE ISOTOPES ; ISOTOPES ; MAMMALS ; NATIONAL ORGANIZATIONS ; NUCLEI ; NUMERICAL DATA ; ODD-EVEN NUCLEI ; ORGANS ; RADIOISOTOPES ; RUMINANTS ; US DOE ; US ORGANIZATIONS ; VERTEBRATES ; WEAPONS 510302* -- Environment, Terrestrial-- Radioactive Materials Monitoring & Transport-- Terrestrial Ecosystems & Food Chains-- (-1987)
URL	http://www.osti.gov/scitech/servlets/purl/6728891
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/263377
推荐引用方式 GB/T 7714	Sasser, L.B.,Soldat, J.K.,Kennedy, W.E. Jr.,et al. Dose assessment for sheep exposed to fallout from nuclear test Nancy,1982.