Analysis of core damage frequency: Zion, Unit 1 internal events

Technical Report · Tue May 01 04:00:00 EDT 1990

OSTI ID:7126377

Sattison, M B; Hall, K W ^[1]

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1. EG and G Idaho, Inc., Idaho Falls, ID (USA)

This document contains the accident sequence analyses of internally initiated events for the Zion Unit 1 Nuclear Power Plant. This is one of the five plant analyses conducted as part of the NUREG-1150 effort for the Nuclear Regulatory Commission. The work performed and described here is an extensive reanalysis of the work published in October 1986 as NUREG/CR-4550 Volume 7. It addresses comments from numerous reviewers and provides significantly more detailed modeling of most aspects of the Zion plant. The mean core damage frequency at Zion was calculated to be 3.4E-4 per year, with a 95% upper bound of 8.4E-4 per year and a 5% lower bound of 1.1E-4 per year. Note that this range is based only on the statistical treatment of six specific issues. Reactor coolant pump seal loss of coolant accidents (LOCAs) were the largest contributors to the core damage frequency, accounting for approximately 85% of the total. 8 refs., 37 figs., 169 tabs.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (USA). Div. of Systems Research; EG and G Idaho, Inc., Idaho Falls, ID (USA)
• Sponsoring Organization: NRC
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 7126377
• Report Number(s): NUREG/CR-4550-Vol.7-Rev.1; EGG--2554-Vol.7-Rev.1; ON: TI90012647
• Country of Publication: United States
• Language: English

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ACCIDENTS
BLACKOUTS
COOLING SYSTEMS
DAMAGE
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DATA BASE MANAGEMENT
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ENERGY TRANSFER
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FAILURE MODE ANALYSIS
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NUMERICAL DATA
POWER REACTORS
PUMPS
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REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTOR CORES
REACTOR SAFETY
REACTORS
RISK ASSESSMENT
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STATISTICAL DATA
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THERMAL REACTORS
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ZION-1 REACTOR