ML20215M565
| ML20215M565 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 10/27/1986 |
| From: | Marshall B VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Kregloe W VIRGINIA, COMMONWEALTH OF |
| References | |
| NUDOCS 8611030027 | |
| Download: ML20215M565 (2) | |
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'e October 27, 1986 vww.wowm CERTIFIED MAIL i
RETURN RECEIPT REQUESTED 1
c Mr. W. L. Kregloe Virginia Water Control Board Valley Regional Office 116 North Main Street P. O. Box.268 Bridgewater, Virginia 22812
Dear Mr. Kregloe:
Re: North Anna Power Station - Oil Spill and Unusual Discharge of Resin This letter clarifies earlier reports of oil spills on October 22 and 24, 1986. Since your office was notified of these discharges, additional information has been obtained that indicates the substance discharged on October 22 was not oil but a type of resin.
On October 22 station personnel were cleaning out a turbine building sump in which resin had collected in preparation for skimmer pump maintenance.
Personnel were assigned to observe the discharge into a catch basin while the high capacity pump was activated for a few minutes to lower the level in the sump. No oil was observed in the basin or in the lake at the intake area while pumping took place. Approximately 10 minutes later at 10:56 a.m., a small amount of a substance, presumed to be oil, appeared on the lake surface i
i near the outfall from the turbine building sumps (NPDES Outfalls 012, 013, m
014). The substance was contained by a permanent boom in place around the s
l discharge and removed using absorbent pads and sweeping.
l Later that day at approximately 1:00 p.m., a small amount of this same substance appeared outside the permanent boom placed around NPDES Outfall 004 in the discharge canal. The substance dissipated before any cleanup could be affected.
Both of these incidents were reported as oil spills, but upon further investigation, station personnel were able to identify the substance as a polystyrene resin that had overflowed the sump.
To prevent further occurrences, the resin was removed from the sump. Cleaning of the sump and g
repair of the skimmer pump have been completed.
On October 24 at approximately 12:00 p.m., another small amount of an oily substance was observed behind the permanent boom at Outfall 004 on the discharge canal. While the substance did not react exactly like oil, a camphor on water test of a sample of the substance tested positive for oil.
B611030027 861027 PDR ADOCK 0500 B
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'6 Mr. W. L. Kregloe Page 2 October 27, 1986 It was first thought that this incident was related to the previous ones, but on further investigation, it was discovered a pump which removes the oil layer from the oil / water separator to a holding tank had been inoperable for some time. The pump had been repaired and returned to service but a large buildup of sludge had occurred while the pump was not operating. The oil / water separator was subsequently desludged.
All corrective actions have been completed and it is assumed that cleaning actions and repairs will prevent reoccurrence. No adverse envircamental impacts were observed as a result of these incidents.
If you have any further questions regarding these incidents, please contact this office.
Sincerely, B. M. Marshall Manager Water Quality cc: Dr. J. Nelson Grace, USNRC Docket No. 50-338/50-339 Mr. Harold R. Denton, USNRC Docket No. 50-338/50-3390 Mr. M. W. Branch, USNRC Docket No. 50-338/50-339
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