Savannah River Reactor Operation: Indices of risk for emergency planning

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Periodically it is necessary to re-examine the implications of new source terms for neighboring offsite populations as Probabilistic Risk Assessment (PRA) and Severe Accident studies mature, and lead to a better understanding of the progression of hypothetical core melt accidents in the Savannah River Site (SRS) reactors. In this application multiple-system failure, low-frequency events, and consequently higher radiological source terms than from normal operation or design basis accidents (DBAs) are considered. Measures of consequence such as constant dose vs distance, boundary doses, and health effects to close-in populations are usually examined in this context. A set of source terms developed ... continued below

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O'Kula, K.R. & East, J.M. October 1, 1990.

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Description

Periodically it is necessary to re-examine the implications of new source terms for neighboring offsite populations as Probabilistic Risk Assessment (PRA) and Severe Accident studies mature, and lead to a better understanding of the progression of hypothetical core melt accidents in the Savannah River Site (SRS) reactors. In this application multiple-system failure, low-frequency events, and consequently higher radiological source terms than from normal operation or design basis accidents (DBAs) are considered. Measures of consequence such as constant dose vs distance, boundary doses, and health effects to close-in populations are usually examined in this context. A set of source terms developed for the Safety Information Document (SID) for support of the Reactor Operation Environmental Impact Statement (EIS) forms the basis for the revised risk evaluation discussed herein. The intent of this review is not to completely substantiate the sufficiency of the current Emergency Planning Zone (EPZ). However, the two principal measures (200-rem red-bone marrow dose vs distance and 300-rem thyroid dose vs distance) for setting an EPZ are considered. Additional dose-at-distance calculations and consideration of DBA doses would be needed to complete a re-evaluation of the current EPZ. These subject areas are not addressed in the current document. Also, this report evaluates the sensitivity of individual risk estimates to the extent of offsite evacuation assumed from a K reactor severe accident and compares these risks to the Draft DOE Safety Guidelines. 14 refs., 8 figs., 4 tabs.

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  • Other: DE91011054
  • Report No.: WSRC-RP-90-348-Rev.1
  • Grant Number: AC09-89SR18035
  • DOI: 10.2172/6004662 | External Link
  • Office of Scientific & Technical Information Report Number: 6004662
  • Archival Resource Key: ark:/67531/metadc1097842

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  • October 1, 1990

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  • Feb. 18, 2018, 3:59 p.m.

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  • May 15, 2018, 2:32 p.m.

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O'Kula, K.R. & East, J.M. Savannah River Reactor Operation: Indices of risk for emergency planning, report, October 1, 1990; Aiken, South Carolina. (https://digital.library.unt.edu/ark:/67531/metadc1097842/: accessed March 18, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.