ENS 43916
ENS Event | |
|---|---|
16:15 Jan 18, 2008 | |
| Title | Offsite Notification of Tritium Identified in Water Samples from Piping Leak |
| Event Description | This is a report of a situation, related to the protection of the environment, for which a notification to other government agencies is being made, as described in 10CFR50.72(b)(2)(xi).
On January 17, 2008, at approximately 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br />, site environmental monitoring personnel at River Bend Station completed analysis which confirmed the presence of tritium in water samples taken from a piping leak that occurred on January 16, 2008, on plant property. The source of the tritium was from water that had been treated in the liquid radwaste system and was suitable for release. The Louisiana Department of Environmental Quality and other state and local officials are being notified in accordance with the voluntary NEI groundwater protection initiative. The following is a summary of the events that led up to the identification of tritium in the water sample. On January 16, 2008, at approximately 1750 hours0.0203 days <br />0.486 hours <br />0.00289 weeks <br />6.65875e-4 months <br /> with the plant shutdown in Mode 5 (Refueling), River Bend Station personnel identified a water leak from a cooling tower blowdown line. The design of this system takes water from the plant's cooling tower basin. This water mixes with treated water being discharged from the liquid radwaste system. The diluted blowdown is then discharged to the Mississippi River. Plant operators received a low blowdown line flow alarm and immediately terminated the discharge of water from the liquid radwaste system. The cooling tower blowdown pumps were also subsequently stopped. The leak was caused by a failure of the blowdown piping. The leak was located inside the owner controlled area near the plant's cooling towers. Based on the location of the leak, the water drained to a nearby storm drain and into East Creek (Outfall 3). East Creek exits the plant site and discharges to the Mississippi River. The volume of the spill as been estimated to be less than 720 gallons of water from the radwaste system. This water had been treated and was suitable for release. Additional clean water from the cooling tower basin mixed with the water from the liquid radwaste system and was released. The analysis of a water sample, taken at the discharge point to East Creek determined that the samples contained 28,042 Pico Curies per liter (pCi/I) tritium. The NRC reporting level for a non-drinking water pathway is 30,000 pCi/I. Samples taken directly at the location of the leak contained 129,456 pCi/I tritium. The release has no potential to impact the health and safety of the public. RBS personnel are investigating the cause of the leak and will not restore blowdown until action is taken to prevent further occurrence. The licensee has notified the NRC Resident Inspector. |
| Where | |
|---|---|
River Bend  Louisiana (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | |
| Time - Person (Reporting Time:+-4.37 h-0.182 days <br />-0.026 weeks <br />-0.00599 months <br />) | |
| Opened: | Glenn Krause 11:53 Jan 18, 2008 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Jan 18, 2008 |
| 43916 - NRC Website
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WEEKMONTHYEARENS 549912020-11-11T00:27:00011 November 2020 00:27:00
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