Improved equipment and procedures for BWR control-rod drive replacement. Final report

Technical Report · Fri Mar 01 04:00:00 EST 1985

OSTI ID:6123380

Turner, A P; Monius, D A; Gorman, J A

BWR control rod drives (CRDs) must be removed periodically from the reactor and rebuilt to replace seals and other worn components. Removing the CRDs is a difficult operation which must be accomplished in the cramped space under the reactor vessel in a heavily contaminated, high radiation area. Replacing CRD's frequently consumes considerable critical path time and accounts for a significant portion of the radiation exposure accumulated during an outage. This report evaluates the procedures and equipment that are used for CRD replacement, and identifies procedure changes and equipment modifications that can be used to improve CRD replacement operations. Several changes to existing equipment that have been implemented at some BWR plants are identified. Additional improvements of existing equipment are proposed. Needs for new equipment development are identified and the required functional characteristics of the new equipment are described.

• Research Organization: Dominion Engineering, Inc., McLean, VA (USA)
• OSTI ID: 6123380
• Report Number(s): EPRI-NP-3895; ON: TI85920503
• Country of Publication: United States
• Language: English

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