05000286/FIN-2012002-01
Finding | |
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| Title | Failed to Submit an LER for a Single Cause of Two Auxiliary Boiler Feedwater Trains Inoperable |
| Description | The inspectors identified a Severity Level lV, NCV of 10 CFR 50.73(a)(2)(vii), because Entergy personnel did not provide a written Licensee Event Report (LER) to the NRC within 60 days of identifying a single condition which caused two trains of auxiliary feedwater (AFW) to become inoperable. The safety-grade nitrogen backup to instrument air in the auxiliary boiler feed pump (ABFP) room is designed to provide 30 minutes of motive force to air operated AFW valves in the event that non-safety-related instrument air is lost. The discharge flow control valves (FCVs) for the ABFPs are designed to fail full open on a loss of all air pressure in order to ensure AFW is provided to the steam generators for decay hea
removal. However, with the FCVs full open, the motors for 31 and 33 motor-driven ABFPs could reach an overcurrent condition, which, if coincident with degraded bus voltage, could cause the motor circuit breakers to trip open approximately 400 seconds from breaker amptector actuation. To protect the pump motor circuit breakers from possible trip while the nitrogen system is not available, and ensure AFW operability, a dedicated operator is required to be stationed locally to provide manual control of the FCVs if instrument air is lost. However, on October 11, 2011, Entergy personnel caused two trains of AFW to become inoperable for 45 minutes when they isolated the nitrogen backup system to instrument air during maintenance and did not station a dedicated operator as a compensatory measure. This issue was entered into Entergys CAP as CR-IP3-2012-00394. This violation involved not making a required report to the NRC and is considered to impact the regulatory process. Such violations are dispositioned using the traditional enforcement process instead of the Significance Determination Process. Using the Enforcement Policy Section 6.9, Inaccurate and Incomplete Information or Failure t Make a Required Report, example (d)(9), which states A licensee fails to make a report required by 10 CFR 50.72 or 10 CFR 50.73, the NRC determined this violation is more than minor and is categorized as a Severity Level IV violation. Because this violation involves the traditional enforcement process with no underlying technical violation that would be considered more than minor in accordance with IMC 0612, a cross-cutting aspect is not assigned to this violation. (Section 1R15.1) |
| Site: | Indian Point  |
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| Report | IR 05000286/2012002 Section 1R15 |
| Date counted | Mar 31, 2012 (2012Q1) |
| Type: | TEV: Severity level IV |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | J Furia M Gray M Halter P Cataldo S Barr |
| INPO aspect | |
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Finding - Indian Point - IR 05000286/2012002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Indian Point) @ 2012Q1
Self-Identified List (Indian Point)
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