ML17309A679

NPDES Noncompliance Notification:On 920409,between 920501-07 Inadvertent Release of Hydrazine to Onsite East Stormwater Basin Detected.Caused by Need to Drain Sg.Operating Procedures Will Be Modified to Ensure Full Control

ML17309A679
Person / Time
Site:	Saint Lucie
Issue date:	06/05/1992
From:	Sager D FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-92-164, NUDOCS 9206120031
Download: ML17309A679 (8)

Text

ACCELERATED DIS RIBUTION DEMONS~TION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9206120031 DOC.DATE: 92/06/05 NOTARIZED: NO DOCKET FACIL:50-335 St. Lucie Plant, Unit 1, Florida Power 6 Light Co. 05000335 50-389 St. Lucie Plant, Unit 2, Florida Power 6 Light Co. 05000389 AUTH. NAME AUTHOR AFFILIATION SAGER,D.A. Florida Power 6 Light Co.

RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

NPDES noncompliance notification:on 920409,between 920501-07 inadvertent release of hydrazine to onsite east stormwater D basin detected. Caused by need to drain SG.Operating procedures will be modified to ensure full control.

DISTRIBUTION CODE: IE23D COPIES RECEIVED:LTR  ! ENCL 7 SIZE:

TITLE: Environmental Event Report (per Tech Specs)

NOTES RECIPIENT COPIES RECIPIENT COPIES D ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD2-2 LA 3 3 PD2-2 PD 1 1 D NORRIS,J 1 1 INTERNAL: ACRS 5 5 NRR/DREP/PEPB9 D 1 1 NRR R ~ SJXL B12 i

1 1

1 1

OGC/HDS3 RGN2 1

1 1

1 EXTERNAL: NR PDR 1 1 NSIC 1 1 R

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D NOTE TO ALL "RIDS" RECIPIENTS:

S PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM P 1-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 17 ENCL 17

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P.O. Bex 128, Ft. Pierce, FL 34954-0128 June 5, 1992 L-92-164 EPP 4.1 U. S. Nuclear Regulatory Commission Attn: Document Control Desk

, Washington, DC 20555 RE: St. Lucie Units 1 and 2 Docket Nos. 50-335 and 50-389 Special Report Unusual or Im ortant Environmental Event On April 9, 1992, an inadvertent release of hydrazine to the St.

Lucie Plants onsite east stormwater basin was detected. The attached report of this event is being sent pursuant to Section 4.1 of the St. Lucie Units 1 and 2 Environmental Protection Plan.

Should you have any questions on this information, please contact us ~

Very truly yours, D. A. ger Vice r 'esident St. L Plant DAS/JJB/kw cc: Stewart D. Ebneter, Regional Administrator, Region Senior Resident Inspector, USNRC, St. Plant II, USNRC DAS/PSL f708-92 r C'Pr,Q "jQ 920612003j mph@5 PDR ADOCK 05000335 8 .

PDR an FPi. GrouP comPany

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P.O. Box 078768, West Palm Beach, FL 33407-0768 5500 Village Blvd.

FPL June 4, 1992 Mr. Ivan Pettit Florida Department of Environmental Regulation Southeast District 1900 South Congress Ave., Suite A West Palm Beach, Florida 33406 Re: Hydrazine Release St. Lucle Phnt

Dear Mr. Pettit:

As a follow;up to our verbal report to you, we are herein providing a description of releases of hydrazine to the St. Lucie Plant's onsite East Stormwater (percolation) Basin which occurred between May'1, 1992 and May 7, 1992.

During the first week of May 1992, during routine maintenance and refueling at the plant, the Unit 2 steam generators were placed in a "wet layup condition". When in this status, the water in the steam generators must be chemically treated to prevent internal metal surface corrosion. The treatment chemical commonly utilized at the plant is the "oxygen scavenger", hydrazine. At certain times during wet layup, this aqueous hydrazine solution must be drained to accommodate system maintenance and/or optimal water chemistry control.

Normally, hydrazine drains are directed to the plant site's once through cooling water discharge canal under authority granted by the USEPA's National Pollutant Discharge Elimination System regulations.

During the first week of May 1992, several periods of steam generator draining became necessary.

Discharges were directed to a sump which was believed to drain to the cooling water discharge canal.

However, it was subsequently determined that the sump, to which the discharges were made, discharged to the onsite basin described above.

Based on the volume and concentration of hydrazine in the steam generator water, calculations indicated that approximately 138 pounds of hydrazine were drained to the basin. Since the RQ for hydrazine is one

. (1) pound, it was determined that the release was reportable under CERCLA. A courtesy verbal report was also made to the State Emergency Response Commission (State Warning Point) to ensure that any potential SARA reporting was accomplished. These reports were made on the evening of May 9, 1992.

To prevent releases of this type in the future the following actions have been taken:

1. Plant operating procedures addressing steam generator draining will be modified to ensure full control of future hydrazine discharges.

2. Steam generator draining operations will be incorporated into plant training programs emphasizing plant drainage systems and operating procedure conformance.

an FPL Group company

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I Pleyse note that the events described in this correspondence are not believed to have resulted in any on-or offsite health or safety impacts. Additionally, you will note that the State Emergency Response Commission (State Warning Point) is copied on this correspondence as a follow-up to the verbal notification made to them on May 9, 1992.

If there are any questions, please direct them to Alan Benedict at telephone 407-697-6964.

Sincerely, Larr . Leskovjan, Manager Hazardous Substances Regulation LLLku cc: State Emergency Response Commission

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