05000289/FIN-2008004-02
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | |
| Description | The inspectors identified an NCV of TS 4.2.2 for improper implementation of applicable American Society of Mechanical Engineers (ASME) Operation and Maintenance (OM) Code requirements for quarterly in-service testing (IST) of the B makeup pump (MU-P-1B). Specifically, the quarterly test procedure did not set pump differential pressure (d/p) or flow at a reference value which was readily duplicated when measuring required vibration data. Additionally, the test procedure allows adjustment of a 1 inch by-pass valve (MUV- 205) which could also influence pump d/p and the test reference value. The NRC inspectors determined that historically, the quarterly MU-P-1B pump test was not in accordance with the ASME Code and could have impacted proper vibration trending to adequately detect a degraded pump condition. Corrective actions included an extent-of-condition review of all IST test procedures, revision of the MU-P-1B test method to establish a fixed reference point for the duration of the test, and establishing a fixed position for the 1 inch bypass valve (IR 807157). This finding is more than minor because it affected the equipment performance attribute of the Mitigating Systems cornerstone and the associated cornerstone objective of ensuring the reliability of systems that respond to initiating events to prevent undesirable consequences. This finding was of very low safety significance because it involved a qualification deficiency that was confirmed not to result in a loss of operability. This finding has a cross-cutting aspect in the area of problem identification and resolution (PI&R), corrective actions program component, because corrective actions to a prior similar NRC violation (NCV 05000289/2004004-02) regarding IST of the reactor river pumps, did not thoroughly evaluate the problem such that deficient IST testing of MU-P-1B was identified and corrected. As a result, deficient IST testing of MU-P-1B continued until identified by the NRC inspectors in 2008 P.1(c). (Section 1R22) |
| Site: | Three Mile Island  |
|---|---|
| Report | IR 05000289/2008004 Section 1R22 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.22 |
| Inspectors (proximate) | D Werkheiser S Barr T Burns R Nimitz J Brand D Kern D Everhart |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
| ' | |
Finding - Three Mile Island - IR 05000289/2008004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Three Mile Island) @ 2008Q3
Self-Identified List (Three Mile Island)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||