Integrated risk assessment for the LaSalle Unit 2 nuclear power plant

Technical Report · Sat Aug 01 04:00:00 EDT 1992

OSTI ID:7022303

Brown, T D; Payne, Jr, A C; Miller, L A; Shiver, A W; Higgins, S J; Sype, T T ^[1]; Johnson, J D ^[2]; Chanin, D I ^[3]

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1. Nuclear Regulatory Commission, Washington, DC (United States). Div. of Safety Issue Resolution
2. Science Applications International Corp., Albuquerque, NM (United States)
3. Technadyne Engineering Consultants, Inc., Albuquerque, NM (United States)

This document discusses a Level III probabilistic risk assessment (PRA) which was performed for the LaSalle Unit 2 nuclear power plant. This plant is located in Brookfield Township, LaSalle County, Illinois which is 55 miles southwest of Chicago. The objective of this study was to provide an estimate of the risk to the offsite population during full power operation of the plant and to include a characterization of the uncertainties in the calculated risk values. Uncertainties were included in the accident frequency analysis, accident progression analysis, and the source term analysis. Only weather uncertainties were included in the consequence analysis. The risk estimates presented in this report include contributions from both internal and external initiators. The offsite risk to the public due to the operation of LaSalle County Station is relatively low, especially with respect to the NRC safety goals. The mean individual early fatality risk within 1 mile is 1.lE-10/R-yr which is more than three orders of magnitude below the safety goal. Similarly, the mean individual latent cancer fatality risk is 8.5E-09/R-yr which is slightly more than two orders of magnitude below the safety goal. In fact, the entire uncertainty distributions for these two risk measures lie below the safety goals. The mean values for early fatality risk and for latent cancer fatality risk are 1.2E-08/R-yr and 0.25/R-yr, respectively.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (United States). Div. of Safety Issue Resolution; Science Applications International Corp., Albuquerque, NM (United States); Technadyne Engineering Consultants, Inc., Albuquerque, NM (United States)
• Sponsoring Organization: NRC; Nuclear Regulatory Commission, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7022303
• Report Number(s): NUREG/CR-5305-Vol.1; SAND--90-2765-Vol.1; ON: TI92040686
• Country of Publication: United States
• Language: English

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