ENS 44433
ENS Event | |
|---|---|
10:00 Aug 20, 2008 | |
| Title | Unanticipated or Emergency Discharge of Waste Water or Chemical Substances |
| Event Description | Plant Technical Specifications, Appendix B, Section 4.1, Unusual or Important Environmental Events, states that the NRC Operations Center will be notified within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> as described in 10 CFR 50.72 for an unanticipated or emergency discharge of waste water or chemical substances. This notification is due to an unanticipated emergency discharge of storm drain waste water beginning 8/20/08 at approximately 0600 due to Tropical Storm Fay. A 30 day letter detailing the event to the NRC is also required.
On 8/20/08, St Lucie Plant water levels in all of the plant storm water basins and Unit 1 Condenser Pit experienced a significant level increase received due to approximately 15 inches of precipitation from Tropical Storm Fay. Over the next 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> the site pumped approximately 23 million gallons of water from the storm water basins into the intake canal from an approved outfall (008). The water level in the basin has decreased 8.7 feet to 6.7 feet. Pumping activities will continue until we reach a level of 5 feet in the pond. The total estimated amount of water expected to be discharged from outfall-008 is 40 million gallons. Chemistry obtained samples from the storm basin and Condenser Pit both and the samples were determined not to contain radioactivity. The non-radiological analysis will be forthcoming from an offsite laboratory (the FPL 45th street lab), however no oil sheen was observed prior to any discharge. The lab results will be included in the 30 day NRC letter detailing the event. The DEP [ Department of Environemntal Protection] was contacted and a verbal request was made and consent received to pump water from the U- I condenser pit to the intake canal. A final report will be sent to the DEP when pumping is concluded identifying total volumes and water profiles. The Plant NPDES permit does not regulate the volume of water discharged from 008. As a result of the Unit 1 Condenser Pit flooding, secondary Condensate and Feedwater chemistry levels sodium and chloride levels increased to Plant Action Level 3 conditions which require the Unit to be shutdown to at least Mode 2 conditions. Due to End of Cycle conditions and Xenon build-in, the Unit was shutdown and is currently in Mode 3. The Turbine was manually tripped and the Control Rods were driven to All Rods In, i.e., there was no reactor trip or RPS / AFAS actuation. Residual reactor heat is being removed by Atmospheric Dump Valves and Auxiliary Feedwater is providing makeup to the S/Gs. Repairs are being implemented to prevent Condenser Pit flooding and secondary inleakage. Unit 2 operations was not affected by this event. Off-Site power remained available during this event. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Saint Lucie  Florida (NRC Region 2) | |
| Reporting | |
| Other Unspec Reqmnt | |
| Time - Person (Reporting Time:+52.6 h2.192 days <br />0.313 weeks <br />0.0721 months <br />) | |
| Opened: | Calvin Ward 14:36 Aug 22, 2008 |
| NRC Officer: | Vince Klco |
| Last Updated: | Aug 22, 2008 |
| 44433 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Hot Standby (0 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 444332008-08-20T10:00:00020 August 2008 10:00:00
[Table view]Other Unspec Reqmnt Unanticipated or Emergency Discharge of Waste Water or Chemical Substances 2008-08-20T10:00:00 | |