NRC integrated program for the resolution of Unresolved Safety Issues A-3, A-4 and A-5 regarding steam generator tube integrity: Final report

Technical Report · Thu Sep 01 04:00:00 EDT 1988

OSTI ID:6779855

This report presents the results of the NRC integrated program for the resolution of Unresolved Safety Issues (USIs) A-3, A-4, and A-5 regarding steam generator tube integrity. A generic risk assessment is provided and indicates that risk from steam generator tube rupture (SGTR) events is not a significant contributor to total risk at a given site, nor to the total risk to which the general public is routinely exposed. This finding is considered to be indicative of the effectiveness of licensee programs and regulatory requirements for ensuring steam generator tube integrity in accordance with 10 CFR 50, Appendices A and B. This report also identifies a number of staff-recommended actions that the staff finds can further improve the effectiveness of licensee programs in ensuring the integrity of steam generator tubes and in mitigating the consequences of an SGTR. As part of the integrated program, the staff issued Generic Letter 85-02 encouraging licensees of pressurized water reactors (PWRs) to upgrade their programs, as necessary, to meet the intent of the staff-recommended actions; however, such actions do not constitute NRC requirements. In addition, this report describes a number of ongoing staff actions and studies involving steam generator issues which are being pursued to provide added assurance that risk from SGTR events will continue to be small. 146 refs., 5 figs., 11 tabs.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (USA). Office of Nuclear Reactor Regulation
• OSTI ID: 6779855
• Report Number(s): NUREG-0844; ON: TI89000472
• Country of Publication: United States
• Language: English

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210700 -- Nuclear Power Plants-- Regulation & Licensing
22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
29 ENERGY PLANNING, POLICY, AND ECONOMY
293000 -- Energy Planning & Policy-- Policy
Legislation
& Regulation
ACCIDENTS
BOILERS
COOLING SYSTEMS
DATA
DOCUMENT TYPES
ENERGY SYSTEMS
HUMAN FACTORS
INFORMATION
LICENSING
LOSS OF COOLANT
MELTDOWN
NATIONAL ORGANIZATIONS
NUMERICAL DATA
PRESSURE TUBES
PROGRESS REPORT
PWR TYPE REACTORS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTOR SAFETY
REACTORS
REGULATIONS
RISK ASSESSMENT
SAFETY
STEAM GENERATORS
TUBES
US NRC
US ORGANIZATIONS
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS