Graduate Thesis Or Dissertation
 

An analysis of the Diablo Canyon Power Plant Radiological Environmental Monitoring Program sampling results from the Cal Poly, San Luis Obispo, dairy herd milk, post-Fukushima

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/fn107185k

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  • This study focuses on iodine-131 detected in milk samples from the Dairy Science Unit at Cal Poly, San Luis Obispo, California following events at the Fukushima Dai-ichi Nuclear Power Plant in March of 2011. The samples were collected as part of the Diablo Canyon Nuclear Power Plant (DCPP) Radiological Environmental Monitoring Program (REMP) on the central coast of California. Presented is a summary review of the DCPP REMP and collection methods as they relate to other sampling conducted along the west coast of the United States during this period. Also included is a brief discussion of the analysis methods performed by third party laboratories. A correlation is made between the integrated activity of iodine-131 found in milk and the integrated activities of rainwater, vegetation and air samples that were collected during a four week period from March 19 to April 16, 2011. Finally, a comparison is made to previous studies conducted on dairy cattle that were administered controlled amounts of iodine-131 through ingestion. The comparison shows a close correlation to a model which states that generally 1 percent of the activity of iodine-131 ingested by dairy cattle will be detected per liter of milk harvested. Additional factors supporting this conclusion are discussed, such as: the abruptness of the air plume that deposited iodine-131 over the study area; the timely influx of seasonal precipitation that coincided the study period; and the general layout of the dairy's feed and water supply. In all, considering the environmental factors and the uncertainties involved, these data and calculated results derived from a real world situation, provide an excellent application and confirmation of studies done under controlled settings.
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