NRC NEWS

 U.S. NUCLEAR REGULATORY COMMISSION 

 Office of Public Affairs Telephone: 301/415-8200

 Washington, D.C. 20555-0001 E-mail: opa@nrc.gov 

 Web Site: http://www.nrc.gov

 

No. 07-058 May 7, 2007

NRC ANNOUNCES FIRST PHASE OF

STATE-OF-THE-ART REACTOR CONSEQUENCE ANALYSIS

The Nuclear Regulatory Commission is continuing its State-of-the-Art Reactor Consequence

Analysis (SOARCA), which will be used to realistically predict the consequences of potential accidents

at commercial U.S. reactors.

Under direction from the five-member Commission the staff will begin SOARCA’s first phase,

which will focus on ensuring the project’s analysis methods mesh properly and have the data necessary

for the most realistic results. This phase will study two sites, the boiling water reactors at Peach Bottom

in Pennsylvania, and the pressurized water reactors at Surry in Virginia.

“Both sites have significant databases available from earlier studies, and this detailed information will

make it easier to judge where the analysis can be improved,” said Farouk Eltawila, Director of the

Division of Risk Assessment and Special Projects in the NRC’s Office of Nuclear Regulatory Research.

“The results will also help us ensure we know what information we’ll need from other sites.”

 Peach Bottom and Surry both volunteered to take part in the program. NRC staff will gather

relevant information from the plants, then conduct the analysis along with contractors from Sandia

National Laboratories. Once the staff finishes these analyses later this year, the Commission will

examine the results and provide guidance on how to analyze the remaining reactor and containment

designs at U.S. commercial nuclear power plants.

“We’re undertaking this research to replace work that’s almost 25 years old – studies that were so

conservative that their predictions are not useful for characterizing results or guiding public policy.

Those predictions have sometimes been misinterpreted and often misused,” Eltawila said. “Today’s

computer-based analytical tools are much more capable of realistically evaluating potential nuclear

power plant accidents, and this project should improve everyone’s understanding of the realistic

consequences of such potential accidents.”

Nuclear power plant accidents are extremely unlikely; should one occur, existing plant

components and procedures would mitigate most types of accidents. Nevertheless, it’s important to

understand an accident’s possible consequences. The project will analyze U.S. reactors, incorporating

more than 20 years of research to develop realistic estimates of possible consequences resulting from a
potential accident. The analyses will then use site-specific weather and population data to determine the

effects on public health and safety. The results of these analyses will be compiled in a public document

to be released once the entire project is complete in 2009. 

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