ELV-04037, NPDES Noncompliance Notification:On 920914,water Discharged from Cooling Tower Basin Via Storm Drain to Retention Pond 1 & Alarm Received in Control Room.Caused by out-of-calibr Level Transmitter.Level Transmitter Will Be Repaired

NPDES Noncompliance Notification:On 920914,water Discharged from Cooling Tower Basin Via Storm Drain to Retention Pond 1 & Alarm Received in Control Room.Caused by out-of-calibr Level Transmitter.Level Transmitter Will Be Repaired

ML20106C703
Person / Time
Site:	Vogtle
Issue date:	10/01/1992
From:	Mccoy C GEORGIA POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
ELV-04037, ELV-4037, NUDOCS 9210060313
Download: ML20106C703 (5)

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c. m c , Georgia Power October 1, 1992 ELV-04037 Docket No. 50-424 U. S. Nuclear Regulatory Commission ATTN: Documettt Control Desk Washington, DC 20555 Gentlemen:

V0GTLE ELECTRIC GENERATING PLANT - UNIT 1 NPDES PERMIT NO. GA 0Q26786 In accordance with the requirements of the Environmental Protection Plan, Appendix B of the Vogtle Electric Generating Plant facility Operating License Numbers NPF 68 and NPF-81, enclosed is a copy of correspondence submitted to the Georgia Department of Natural Resources - Environmental Protection Division transmitting a report required by our National Pollutant Discharge Elimination System (NPDES) Permit No. GA 0026786.

Should you have any questions, please advise.

Respectfully submitted,

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Ghorgia Power mka U. S. Nuclear Regulatory Commission ELV-04037 Pago Two cc: Georaia Pquer Company f1r W. B. Shipman, General Manager - Piant Vogtle Mr. M. Sheibani NORMS U. S. Nuclear Reaulatory Commission. Washi.naton. DC Hr. D. S. Hood, Licensing Project Manager - Vogtle U. S. Nuclear Reaulatory Commis11pn. Reaion 11 Mr. S. D. Ebneter, Regional Administrator Mr. B. R. Bonser, Senior Resident inspector - Vogtle l

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tw s r; r: co-: er.e - 4 September 18, 1993 PLANT V0GTLE

• NPDES Permit No. GA0026786 Five Day Report of NPDES Incident VIA 'fELECOPY .

Mr. Lawrence W. Hedges Program Manager, Industrial Wastewater Program 205 Butler Street, S.E. - Room 1070 Atlanta, Georgia 30334

Dear Mr. Hedges:

Attached ir a report submitted in compliance with Part II.A.

2. & 5. of the above referenced NPDES permit.

It details the overflow of the Unit 1 cooling tower basin to Retention Pond

1. 1 and outfall OSN-014 that occurred on September 14, 1992.

Telephone"Inotification was made to Mr. Joseph R. Kane on September 15, 1992.

If you have questions or co:rments, please advise.

Yours very truly, V.

S. D. Holder GNG:gg Attachment

, i V0GTLE ELECTRIC GENERATING PLANT NPDES PERMIT NO. EA 0026786 Dissriotion of incident:

On Monday, September 14, 1932, an NPDES incident occurred at Vogtle Electric Generating Plant (VEGP) which resulted in discharge of water from the Unit I cooling tower basin via a storm drain to Retention Pond fl. Retention Pond

1. 1 discharges to the Savannah River via NPDES Permit point OSN 014.

A cooling tower high level basin alarm was received in the control room at approximately 2211 EDT on September 14, 1992. In response to this alarm, centrol room personnel maximized Unit-I cooling tower blowdown capability and shut off all makeup to the cooling tower in accordance with plant procedures in order to reduce basin water level. At approximately 2358 EDT, a Chemistry foreman observed that the ground area around the Unit I cooling tower basin was wet and water was flowing in the storm drain indicat;ng the Unit I cooling tower basin had overflowed. The foreman notified the control f room and proceeded to sample the cooling tower ground area and storm drain.

The chemical parameters of the discharge samples and results (mg/1) were as follows:

" Chromium

• Samole No. pH Chlorine ling 8.24 Hon-Detectable 0.21 <0.10 1 (East of Unit 1 drain) 0.23 <0.10 2 (Basin ground area) 8.15 Non-Detectable 3 (Retention pond #1) 8.96 Hon-Detectable Non Detectable <0.10

• Results from the Georgia Power Company Environmental Laboratory Cause of the Incident:

The cause of this incident is attributed to an out-of-calibration level transmitter that provides control room indication and alarm upon occurrence of a high level condition in the cooling tower basin. The alarm was not received in time to take corrective e: tion to prevent overflow of the basin.

Period of the Incident:

The period of discharge from the cooling tower basin is estimated to be one hour and 58 minutes. The discharge began at.approximately 2200 EDT and ceased a short time before approximately 23EJ EDT.

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V0GTLE ELECTRIC GENERATING PLANT HPDES PERMIT No. EA 0026786 Page Two Action _Taken to Prev _ent Recurrencet The overflow from the Unit I cooling tower basin dischayed via the storm drain to the Retention Pond #1, which dischages to the Savannah River via NPDES Permit point OSH 014. Analyses of samples taken at the basin

• discharge and the discharge from Retention Pond #1 indicate no adverse impact to the environment occurred as a result of the basin overflow.

A work request was initiated to repair the out-of-calibration level transmitter. In addition, plant management has appointed an event critique team to investigate the cooling tower overflow condition and to preside additir. al corrective action to the plant as appropriate.

Details of this incident were reported verbally to Mr. Geone Guill of Georgia Power Company - Environraental Affairs on September 15, 1992. Verbal notification to the Department of Natural Resources - Environmental Protection Division was provided by Mr. Guill on September 15, 1992, in accordance with the provisions of Part II A.2 of the VEGP NPDES Permit.

This report is submitted in accordance with the requirement for a 5 day written report documenting the above incident as referenced in Part II A.2 of the VEGP NPDES Permit.

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