ML20128D304
| ML20128D304 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 01/22/1993 |
| From: | Marshall B VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Loyd K VIRGINIA, COMMONWEALTH OF |
| References | |
| NUDOCS 9302100108 | |
| Download: ML20128D304 (2) | |
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GERTIFlED MAIL RETURN RECEIPT REOUESTED VIRGINIA POWER January 22, 1993 Mr. Kemper Loyd Virginia Water Control Board Valley Regional Office 116 North Main Street P. O. Box 268 Bridgewater, VA 22012 VPDES PERMIT NO.
VA0052451 RE:
NORTH ANNA POWER STATION CONDENSATE DISCHARGE Dear Hr. Loyd As Mr. Daniel James of my staff discussed with you by telephone on January 21, 1993, the North Anna Power Station had a discharge of condensate frca the Unit 1 condenser hotwell via a previously unreported pipe to the circulating water tunnel.
This event occurred January 8, 1993, during draining of the condenser hotwell as part of the current preparations for replacement of the Unit 1 steam generators.
The discharge consisted of an estimated 140,000 to 210,000 gallons of relatively high purity condensate water, at a pH of 8.83, containing morpholine at 0.3 ppm, nondetectable levels of boric acid, unmeasured trace amounts of hydrazine, and ammonia at <1 ppm (from the decomposition of hydrazine).
No pollutants not previously identified were involved and no violations of any permit limitations occurred.
The drainage from the condenser hotwell should have been routed through the Outfall 003 facilities and piping.
However, due to the unusual nature of operations during this outage and the work being performed in relation to steam generator replacement, the hotwell was drained _to the tunnel in the same vicinity as Outfall 003.
The circulating water tunnel discharges through the discharge canal to the waste heat treatment facility.
No new or unusual discharge to state waters was caused by this event, only a small deviation from the actual location of the proper internal outfall by an estimated 20-25 feet.
The pipe involved in this event will not be used again in the future unless it has b"n included in the station's VPDES permit.
Since this event has pt nted out the potential for pipes to exist which have not been identified for VPDES permit purposes, a review cf theQ4Sf){rds facilities is being conducted to determine if l
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. January 22, 1993 Page 2 there are any others.
Should our evaluation indicate the need for any future dischargos via this pipe, or any others, the appropriate notifications will be made and permit authorizations obtained prior to such discharges.
No evidence of environmental damage was noted as a result of this ovent nor would any be expected to occur, considering the nature of the water discharged.
After introduction to the circulating water tunnel, this internal discharge followed the same routing through the remainder of the station's facilities as does the discharge from the authorized 003 outfall.
As noted above, thn discharge consisted of relatively high purity water and no process vastes were involved.
The additives present in the water discharged were at much lower concentrations than would be precent under normal operations, and will havo no impact on the station's discharge to state waters.
Should you desire additional information or have any questions about this matter, please contact Daniel James at (804) 273-2996.
Sincerely, Y/$' M B. M.
- arshall, P.E.
Manager Water Quality cci U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW Suite 2900 Atlanta, GA 30323 Re:
North Anna Units 1 & 2 Docket Nos. 50-338/50-339 License Nos. NPF-4/NPF-7 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Re North Anna Unit 1 & 2 Docket Nos. 50-338/50-339 License Nos. NPF-4/NPF-7 Mr. M. S.
Lesser NRC Senior Resident Inspector North Anna Power Station