Regulatory and backfit analysis: Unresolved safety issue A-45, shutdown decay heat removal requirements

Technical Report · Tue Nov 01 04:00:00 EST 1988

OSTI ID:6720072

All light water reactors require decay heat to be removed subsequent to reactor shutdown. Interruption of the decay heat removal function could lead to severe consequences. Concerns about the reliability of the systems and components that assist in the decay heat removal process and the potentially severe consequences of a complete loss of decay heat removal resulted in establishing the requirements for decay heat removal as an unresolved safety issue (USI) designated USI A-45, ''Shutdown Decay Heat Removal Requirements.'' This report presents the regulatory analysis for USI A-45. It includes (1) a summary of the issue, (2) the proposed technical resolution, (3) alternative resolutions considered by the Nuclear Regulatory Commission, (4) an assessment of the benefits and costs of all alternatives considered, and (5) the decision rationale. 23 refs., 9 figs., 39 tabs.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (USA). Div. of Safety Issue Resolution
• OSTI ID: 6720072
• Report Number(s): NUREG-1289; ON: TI89003025
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210100 -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
210200 -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
AFTER-HEAT REMOVAL
BWR TYPE REACTORS
COST BENEFIT ANALYSIS
DECISION MAKING
ENERGY TRANSFER
HEAT TRANSFER
MODIFICATIONS
NATIONAL ORGANIZATIONS
PWR TYPE REACTORS
REACTOR SAFETY
REACTOR SHUTDOWN
REACTORS
REGULATIONS
REMOVAL
SAFETY
SHUTDOWNS
US NRC
US ORGANIZATIONS
WATER COOLED REACTORS
WATER MODERATED REACTORS