05000382/FIN-2011007-07
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Finding | |
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| Title | Failure to Provide an Adequate Basis for Temperature Limits of Auxiliary Component Cooling Water Pump Motor Bearings |
| Description | The team identified a Green noncited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, which states, in part, that measures shall be established to assure that applicable regulatory requirements and the design basis are correctly translated into specifications, drawings, procedures, and instructions. Specifically, prior to October 7, 2011, the licensee did not have an adequate technical basis for increasing the auxiliary component cooling water pump motor bearing temperature alarm setpoints or establishing an upper limit on motor bearing temperature, which directed operators to secure the pump. This finding was entered into the licensees corrective action program as Condition Report CR-WF3-2011-06573. The team determined that the failure to provide an adequate basis for increasing the high bearing temperature alarm setpoints and establishing a high temperature motor trip criterion was a performance deficiency. This finding was more than minor because it was associated with the design control attribute of the Mitigating Systems Cornerstone and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. In accordance with NRC Inspection Manual Chapter 0609, Attachment 4, Phase 1 Initial Screening and Characterization of Findings, the issue was determined to have very low safety significance (Green) because it was a design or qualification deficiency confirmed not to result in loss of operability or functionality. Specifically, the licensee performed an engineering justification for the bearing temperatures based on industry guidance. This finding was determined to have a crosscutting aspect in the area of human performance associated with the decision making component because the licensee did not use conservative assumptions in decision making and adopt a requirement to demonstrate that the proposed action is safe in order to proceed rather than a requirement to demonstrate that it is unsafe in order to disapprove the action |
| Site: | Waterford  |
|---|---|
| Report | IR 05000382/2011007 Section 1R21 |
| Date counted | Dec 31, 2011 (2011Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21 |
| Inspectors (proximate) | C Smith T Farnholtz W Sifre J Leivo E Uribe N Hernandez |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Waterford - IR 05000382/2011007 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Waterford) @ 2011Q4
Self-Identified List (Waterford)
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