Closeout of IE Bulletin 80-17: Failure of 76 of 185 control rods to fully insert during a scram at a BWR (boiling water reactor)

Technical Report · Thu Dec 01 04:00:00 EST 1988

OSTI ID:6624643

Dean, R S; Foley, W J; Hennick, A

Documentation is provided in this report for the closeout of IE Bulletin 80-17 on the subject of safety-related failures of control rods to insert fully at boiling water reactors (BWRs). Closeout is based on the implementation and verification of numerous actions required for compliance with the initial bulletin and five supplements. Evaluation of utility responses and NRC/region inspection reports indicates that the bulletin is closed for all of the 23 operating BWRs to which it was issued for action. The main reason for incomplete insertion of control rods was found to be retention of a significant amount of undetected water in the scram discharge volume (SDV). The bulletin and its supplements were forwarded for information only to all BWRs with a construction permit. 2 tabs.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (USA). Div. of Operational Events Assessment; Parameter, Inc., Elm Grove, WI (USA)
• OSTI ID: 6624643
• Report Number(s): NUREG/CR-5191; ON: TI89005613
• Country of Publication: United States
• Language: English

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220900* -- Nuclear Reactor Technology-- Reactor Safety
BWR TYPE REACTORS
CONTROL ELEMENTS
ENERGY TRANSFER
FAILURES
FLUID MECHANICS
HEAT TRANSFER
HYDRAULICS
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US ORGANIZATIONS
WATER COOLED REACTORS
WATER MODERATED REACTORS