Review of NUREG-0654, Supplement 3, “Criteria for Protective Action Recommendations for Severe Accidents” - Technical Basis for Protective Action Strategies (NUREG/CR-6953, Volume 3)

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Publication Information

Manuscript Completed: May 2010
Date Published: August 2010

Prepared by:
R. Sullivan, J. Jones¹, F,J. Schelling¹
N. Bixler¹, and F. Walton¹

¹Sandia National Laboratories
P.O. Box 5800
Albuquerque, NM 87185

R. Sullivan, NRC Technical Lead

Prepared for:
Office of Nuclear Security and Incident Response
U. S. Nuclear Regulatory Commission
Washington, DC 20555-0001

NRC Job Code R3144

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Abstract

Volume 3 of NUREG/CR-6953, “Review of NUREG-0654, Supplement 3, ‘Criteria for Protective Action Recommendations for Severe Accidents,’” is the final volume of the Protective Action Recommendation (PAR) Study. This analysis provides a technical basis for decision criteria that can be used by licensees and offsite response organizations to enhance protective action strategy for nuclear power plant accidents that progress rapidly. The analysis integrated advances in the knowledge of potential accident sequences, protective action strategies, and consequence modeling. The emergency preparedness planning basis includes the potential for very unlikely but credible rapidly progressing accidents, and this analysis was performed to specifically identify PAR strategies for rapidly progressing accidents to support the PAR logic diagram developed for an update to Supplement 3 to NUREG-0654/FEMA-REP-1, Rev. 1, "Criteria for Protective Action Recommendations for Severe Accidents." The updated PAR logic diagram will include a path for General Emergencies and another decision path for accidents defined as rapidly progressing. The technical basis developed may assist licensees and offsite response organizations in tailoring protective action strategies using site specific evacuation time information. It is expected that application of the this technical basis may improve the efficacy of protective actions for a rapidly progressing accident. The analyses performed herein are only applicable to the rapidly progressing accident.