Mark I containment long-term program safety evaluation report, resolution of generic technical activity A-7. Report for February 1977-December 1979

Technical Report · Tue Jul 01 04:00:00 EDT 1980

OSTI ID:6653889

During testing for an advanced Boiling Water Reactor (BWR) containment system design (Mark III), suppression pool hydrodynamic loads were identified which had not been considered in the original design of the Mark I containment system. To address this issue, a Mark I Owners Group was formed and the assessment was divided into a short-term and long-term program. The results of the NRC staff's review of the Mark I Containment Short Term Program are described in NUREG-0408. This report describes the results of the NRC staff's review of the generic Mark I Containment Long Term Program (LTP). The LTP was conducted to provide a generic basis to define suppression pool hydrodynamic loads and the related structural acceptance criteria, such that a comprehensive reassessment of each Mark I containment system would be performed. A series of experimental and analytical programs were conducted by the Mark I Owners Group to provide the necessary bases for the generic load definition and structural assessment techniques. The generic methods proposed by the Mark I Owners Group, as modified by the NRC staff's requirements, will be used to perform plant-unique analyses, which will identify the plant modifications, if any, that will be needed to restore the originally intended margin of safety in the Mark I containment designs.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (USA). Office of Nuclear Reactor Regulation
• OSTI ID: 6653889
• Report Number(s): NUREG-0661
• Country of Publication: United States
• Language: English

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BWR TYPE REACTORS
CONTAINMENT
DESIGN
DYNAMIC LOADS
FLUID MECHANICS
HYDRODYNAMICS
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PRESSURE SUPPRESSION
REACTORS
REGULATIONS
WATER COOLED REACTORS
WATER MODERATED REACTORS