05000247/FIN-2012004-03
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Finding | |
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| Title | Inadequate Procedure Guidance to Maintain 22 ABFP Governor Oiler Level |
| Description | On July 17, 2012, the inspectors identified that there was no visible oil level in the 22 ABFP governor oiler resevoir, which called into question the adequate lubrication of the governor bearing assembly and operability of the 22 ABFP. Entergy staff immediately added oil to the oiler reservoir and documented the condition in CRIP2- 2012-4631. Subsequently, Entergy determined the pump was operable based on an operability evaluation documented in CR-IP2-2011-5447, on November 2, 2011, for a similar condition. This evaluation determined that the pump remained capable of performing its intended function, since the oiler wick within the reservoir remained saturated. In addition, Entergy determined the pump was operable, because the wick was wet upon discovery, which indicated it had recently flowed oil to the governor bearing assembly. The governor oiler utilizes a wick feed oiler with an internal cotton wick which when saturated in oil, flows oil to the governor bearing assembly. The oiler design results in a flow of 2 to 5 drops per hour, which correlates to approximately 6 to 15 ounces per month. However, when the reservoir is empty, the wick becomes un-saturated and no oil flows. Once the oil passes through the governor bearing, it accumulates in the governor sump, where through periodic (every 6 months) preventive maintenance (PM), it is drained, measured and recorded to prevent excessive oil accumulation in the sump, which could adversely affect the governor or pump operation. On July 19, 2012, inspectors again identified that there was no visible oil level in the governor oiler, and that the oilers wick did not come in contact with the bottom of the reservoir as designed. Entergy immediately added oil to the oiler reservoir, adjusted the wick and documented the conditions in CR-IP2-2012-4756 & 4757. On July 25, 2012, the inspectors again identified no visible oil level in the reservoir. Entergy staff immediately added oil to the reservoir and documented the condition in CR-IP2-2012-4803. The NRCs recurrent identification of empty oiler reservoirs, resulted in Entergys initiation of a special log (2-12-079) to verify twice daily that (1) the reservoir oil level is visible, (2) the wick is saturated in oil, (3) entry of the action into operations logs, and (4) track all oil additions with the CAP. As a result of implementing the special log, the inspectors noted oil addition to the oiler increased from approximately twice a month, to daily. In addition, Entergy drained the governor sump using the PM procedure, on August 31, 2012, to prevent excess accumulation of oil in the sump and to compare the recorded volume of oil with the 10 ounces collected during the most recent PM performed on July 30, 2012. The oil collected was 8.5 ounces, which was determined by Entergy to be a volume within the range expected for a month. The inspectors noted that Entergys operability evaluations for the July 19 and July 25, 2012 conditions also referenced the November 2011 evaluation documented in CR-IP2- 2011-5547. The inspectors noted that the evaluation recommended that during oil replenishment, oil addition be maintained at about half way within the reservoir to preclude a siphon effect on the oiler. However, no corrective actions were assigned to implement this recommendation. Furthermore, the evaluation stated that the oilers oil consumption rate was within the expected range. However, the inspectors identified that this was contrasted by the governor sump draining results obtained on August 31, 2012. Specifically, based on 1999 correspondence between Entergy and the oilers vendor Dresser-Rand, Entergy should have expected adding oil to the oiler more frequently and collecting 36 90 ounces of oil during the periodic PM. During the oil additions that followed each event, the inspectors identified that procedure 2-SOP-AFW-001 was referenced for these oil additions, but only required the operator to verify governor oiler level is visible. Hence, the oil added was not quantified nor was an expected level in relation to the wick, specified in this procedure. The inspectors also identified that Entergy staff controlled the wick adjustment with engineering guidance, instead of an established procedure. Entergy initiated CR-IP2-2012-5711, to evaluate the overall condition of the 22 ABFP governor oiler. The evaluation determined that the monitoring of component and equipment operating parameters was less than adequate. Corrective actions included changing the design of the oiler to a gravity feed style oiler; revising the system monitoring criteria to include tracking governor oil consumption; changing the PM frequency from 6 months to 3 months; and evaluating the past operability of the pump as a result of not having the desired vendor-recommended flow rate to the governor bearing assembly (to be performed under CR-IP3-2012-2400). This issue will be tracked as a URI, because Entergys assessment of the impact of inadequate lubrication of the 22 ABFP governor bearing assembly on the past operability of the 22 ABFP with regard to being able to perform its intended safety function for its specified mission time of 29 hours3.356481e-4 days <br />0.00806 hours <br />4.794974e-5 weeks <br />1.10345e-5 months <br /> is needed to determine whether the identified performance deficiency is more-than-minor. This information to be developed is tracked in Entergys CAP under CR-IP3-2012-2400. |
| Site: | Indian Point  |
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| Report | IR 05000247/2012004 Section 1R15 |
| Date counted | Sep 30, 2012 (2012Q3) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | C Crisden H Gray J Furia L Scholl M Gray O Ayegbusi R Montgomery S Mccarver T O'Haraa Burrittj Stewart E Burket K Dunham N Laferty P Cataldo J Furia A Patel |
| INPO aspect | |
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Finding - Indian Point - IR 05000247/2012004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Indian Point) @ 2012Q3
Self-Identified List (Indian Point)
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