ENS 52438
ENS Event | |
|---|---|
16:30 Dec 15, 2016 | |
| Title | Offsite Notification Made for Potential Fuel Oil Leakage |
| Event Description | On 12/14/16 at 1206 [EST], 0-PT-89.9K (underground fuel-oil piping pressure test), was performed UNSAT after a failed attempt to maintain pressure in the supply line to the Unit 2 'H' Emergency Diesel Generator (EDG) Day Tank. The exact source of the leakage is unknown at this time but is reasonable to believe some fuel oil was released underground. The associated Fuel Oil line is currently tagged out and isolated. This condition is reportable to the Virginia Department of Environmental Quality [VA DEQ] as part of the Underground Storage Tank Program. Pressure tasting of the other EDG fuel oil supply lines has been previously completed satisfactorily. The 2H EDG remains Operable as the redundant fuel oil transfer pump and its fuel oil piping are Operable and capable of maintaining adequate day tank level. The VA DEQ was notified of this condition
at 1130 [EST] on 12/15/16. This event is reportable in accordance with 10CFR50.72(b)(2)(xi) for 'Any event or situation, related to the health and safety of the public or onsite personnel, or protection of the environment, for which a news release is planned or notification to other government agencies has been or will be made.' The licensee has notified the NRC Resident Inspector and will notify Louisa County.
This is a follow-up report to Event Number 52438, made on 12/15/2016, regarding offsite notification to the Virginia Department of Environmental Quality for potential fuel oil leakage from the supply line to the Unit 2H Emergency Diesel Generator (EDG) Day Tank. During investigation of the potential fuel oil leak from the 2HB EDG Day Tank supply line (as previously reported in EN 52438), the 2HA fuel oil line, which runs close to the 2HB line, was disturbed and began to leak a mist of fuel oil. The fuel oil was contained in the area and was being cleaned via vacuum truck as it was leaking. Personnel at the scene noted the soil was not contaminated with fuel oil initially and saw the leak start on 2HA line. It has been estimated that less than one gallon of fuel oil was released to the surrounding soil during troubleshooting of the leak. The fuel oil was immediately vacuumed. The 2HA line was isolated and the leakage was stopped. The 2HA line is to be repaired and tested. The 2H EDG remains available, however, it is considered inoperable at this time. Investigation of the 2HB fuel oil line continues. The condition of the 2HA fuel oil line was reported to the Virginia Department of Environmental Quality [VA DEQ] as part of the Underground Storage Tank Program on 12/28/16. Therefore, this event is reportable in accordance with 10CFR50.72(b)(2)(xi) for 'Any event or situation, related to the health and safety of the public or onsite personnel, or protection of the environment, for which a news release is planned or notification to other government agencies has been or will be made.' The licensee has notified the NRC Resident Inspector and will notify Louisa County. Notified R2DO (Rose). |
| Where | |
|---|---|
| North Anna Virginia (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | |
| Time - Person (Reporting Time:+-2.67 h-0.111 days <br />-0.0159 weeks <br />-0.00366 months <br />) | |
| Opened: | Don Taylor 13:50 Dec 15, 2016 |
| NRC Officer: | Dong Park |
| Last Updated: | Dec 28, 2016 |
| 52438 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 578162025-07-17T15:00:00017 July 2025 15:00:00
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