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 NuclearPower Station gy. Fim(Ene.5501 North State Route 2 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 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