05000255/FIN-2012004-03
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Finding | |
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| Title | Foreign Material in SIRWT |
| Description | A finding of very-low safety significance with an associated NCV of TS 5.4.1 was self revealed for failure to implement a maintenance procedure when it was discovered that foreign material had entered the SIRWT during a forced outage to repair the tank. A few days after the tank was refilled, a non-safety-related recirculation pump for the tank failed. The licensee discovered a plastic bag in the pump suction. The licensee entered the issue in their CAP and performed a root cause evaluation. The licensee concluded that inadequate implementation of Quality Procedure EN-MA-118, Foreign Material Exclusion, allowed the bag to enter the SIRWT during the refilling of the tank from the upper manway access. Since all Emergency Core Cooling system (ECCS) pumps have their suctions aligned to the SIRWT, the operability of those pumps came into question upon discovery of the bag in the recirculation pump. As a result, the licensee tested all of the pumps to ensure they were operable. There were no abnormalities noted during the test-runs. The failure to adequately implement EN-MA-118, Foreign Material Exclusion, was a performance deficiency warranting further assessment in the SDP. Specifically, a buffer zone was not established around the upper opening to the SIRWT and consideration was not given to the effects of ventilation in the area. Both contributed to the introduction of foreign material into the tank. Utilizing IMC 0612, Appendix B, the inspectors determined the issue was more than minor because it adversely impacted the Equipment Performance attribute of the Mitigating Systems Cornerstone, whose objective is to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, introduction of foreign material challenged the reliability of all ECCS pumps and necessitated emergent testing to ensure they remained operable. The finding screened as Green, or very-low safety significance, utilizing IMC 0609, Appendix A, based on answering no to all questions in Section A of Exhibit 2. The inspectors also determined that the finding had an associated cross-cutting aspect in the Human Performance area, specifically in the Work Practices component. Based on other examples of poor implementation of the Foreign Material Exclusion (FME) program identified by both the inspectors and licensee; combined with the failure to correct those issues, the inspectors determined that the licensee did not ensure there was adequate supervisory and management oversight of work activities such that nuclear safety was supported. |
| Site: | Palisades  |
|---|---|
| Report | IR 05000255/2012004 Section 1R15 |
| Date counted | Sep 30, 2012 (2012Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | T Bilik J Lennartz J Ellegood B Cushman M Jones P Laflamme T Taylor A Scarbeary |
| CCA | H.2, Field Presence |
| INPO aspect | LA.2 |
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Finding - Palisades - IR 05000255/2012004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Palisades) @ 2012Q3
Self-Identified List (Palisades)
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