05000335/FIN-2009005-01
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Finding | |
|---|---|
| Title | Inadequate Safety-Related Maintenance Procedure to Properly Align the 2B2 Reactor Coolant Pump/Motor Shaft Coupling Assemblies |
| Description | An inspector identified non-cited violation of Technical Specification 6.8.1.a and Regulatory Guide 1.33 was identified for an inadequate safety-related maintenance procedure. Specifically, the inspectors identified that during reassembly of Reactor Coolant Pump (RCP) 2B2 in July 2009 mechanical maintenance procedure MMP-01.17, Reactor Coolant Pump Model N-9000 Seal Removal and Installation, Revision 10, instructed the licensee to utilize a method of checking the RCP coupling alignment that was not in accordance with Byron Jackson Technical Manual 741-N-0001/4, Revision 23. The procedure instructed the maintenance workers to measure the shaft coupling flange face gap clearance rather than measuring the concentricity/runout of the coupling flanges as required in the subject vendor technical manual. This resulted in the RCP running with increased vibrations and ultimately requiring a plant shutdown to perform repairs. This issue was entered into the Corrective Action Program (CAP) as Condition Reports 2009-28512 and 2009-22728 This finding is more than minor because it is associated with procedure quality attribute and affected the objective of the Reactor Safety/Initiating Event Cornerstone to limit the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. Specifically, the subject RCP maintenance procedure did not require the measurement of coupling run-out whenever the coupling is disassembled in accordance with the vendor technical manual requirements which resulted in an unplanned plant shutdown. The finding was determined to be of very low safety significance since it did not contribute to both the likelihood of a reactor trip and that mitigation equipment or functions would not be available. The inspectors determined that the cause of this finding has a crosscutting aspect in the area of human performance associated with the resources attribute, in that the maintenance procedure instructions were not complete or accurate to ensure proper RCP coupling alignment. (IMC 0305 aspect H.2.c) |
| Site: | Saint Lucie  |
|---|---|
| Report | IR 05000335/2009005 Section 4OA2 |
| Date counted | Dec 31, 2009 (2009Q4) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | M Bates T Hoeg S Sanchez M Sykes M Meeks |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
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Finding - Saint Lucie - IR 05000335/2009005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Saint Lucie) @ 2009Q4
Self-Identified List (Saint Lucie)
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