ML062890288

Discharge of Total Residual Oxidants Through National Pollutant Discharge Elimination System Outfall 001

ML062890288
Person / Time
Site:	Davis Besse
Issue date:	09/13/2006
From:	Allen B FirstEnergy Corp
To:	Zuzik R Office of Nuclear Reactor Regulation, State of OH, Environmental Protection Agency
References
NP-07, RAOG 06-0039
Download: ML062890288 (3)

Text

Davis-Besse Nuclear Power Station Fim(Ene.5501 North State Route 2 gy. Oak Harbor, Ohio 43449-9760 CORRECTION RA'OG 06-0039 NP-07 Augu.st- 1,2006 September 13, 2006 Mr. Rick Zuzik, Environmental Scientist Division of Surface Water Ohio Environmental Protection Agency Northwest District Office 347 North Dunbridge Road Bowling Green, Ohio 43402

Subject:

Discharge of Total Residual Oxidants Through National Pollutant Discharge Elimination System Outfall 001

Dear Mr. Zuzik:

The September 6, 2006, daily discharge sample of Total Residual Oxidants (TRO) from the Davis-Besse Nuclear Power Station (DBNPS) National Pollutant Discharge Elimination System (NPDES) Permit 2IB0001 1 *ID Outfall 001 (discharge to Lake Erie)measured 0.28 mg/l. The DBNPS NPDES Permit 21B00011 *ID TRO daily limit at Outfall 001 is 0.05 mg/I. This letter provides the five-day written confirmation, as required by the DBNPS NPDES Permit, of a permit nonconformance.

On Wednesday, September 6, 2006, at 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br />, the daily TRO analysis at Outfall 001 measured 0.28 mg/I. All chlorination/bromination was shut down at 1027 hours0.0119 days <br />0.285 hours <br />0.0017 weeks <br />3.907735e-4 months <br />, and additional TRO sampling continued until 1041 hours0.012 days <br />0.289 hours <br />0.00172 weeks <br />3.961005e-4 months <br /> when the NPDES Outfall 001.discharge concentration decreased to less than the NPDES Outfall limit of 0.05 mg/l.The evaluation of the reason(s) for this permit nonconformance, which is currently underway, has identified several potential causes: A simultaneous lack of chlorine demand due to the plant being manually tripped/shutdown at approximately 0230 hours0.00266 days <br />0.0639 hours <br />3.80291e-4 weeks <br />8.7515e-5 months <br /> and automatic startup of the chlorinatiohi/bromination feed pump to the Circulation Water System from 0730 hours0.00845 days <br />0.203 hours <br />0.00121 weeks <br />2.77765e-4 months <br /> until 0930 hours0.0108 days <br />0.258 hours <br />0.00154 weeks <br />3.53865e-4 months <br /> contributed to the chlorine level increase.The requirement to shut down Intake and Circulating Water chlorination after a plant trip/shutdown was not implemented.

RAOG 06-0039 NP-07 Page 2 of 2 This event has been captured in the DBNPS corrective action process, the evaluation is in progress and appropriate corrective actions will be taken to reduce, eliminate, and/or prevent occurrence of this exceedance.

This condition was discussed with you in a telephone conversation on September 7, 2006, at 0810 hours0.00938 days <br />0.225 hours <br />0.00134 weeks <br />3.08205e-4 months <br /> by a member of my staff, Mr. Stephen M. Chimo. As discussed, this written information is being provided to you within 5 working days of the September 6, 2006, NPDES permit Outfall 001 TRO nonconformance.

Should you have any questions or require additional information, please contact Mr.Stephen M. Chimo at (419) 321-7149.Sincerely yours, Barry S. Allen Director -Site Operations Davis-Besse Nuclear Power Station SMC/JCS Attachment cc: NRC Document Control Desk DB-l NRC Senior Resident Inspector US EPA, Region V RAOG 06-0039 NP-07 Attachment 1 Page 1 of I COMMITMENT LIST The following list identifies those actions committed to by the Davis-Besse Nuclear Power Station in this document.

Any other actions discussed in the submittal represent intended or planned actions by Davis-Besse.

They are described only as information and are not regulatory commitments.

Please notify the Director -Performance Improvement (419-321-7181) at Davis-Besse of any questions regarding any associated regulatory commitments.

COMMITMENTS DUE DATE None NA