ML20236N529
| ML20236N529 | |
| Person / Time | |
|---|---|
| Site: | McGuire  |
| Issue date: | 11/09/1987 |
| From: | Haller W DUKE POWER CO. |
| To: | Gleason D NORTH CAROLINA, STATE OF |
| References | |
| NUDOCS 8711160211 | |
| Download: ML20236N529 (2) | |
Text
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d Duxe Powna COMPANY P.o. BOX 33189 f=_k l
WILLIAM A.HALLER wANAosa 3-NUCLE An T savicss
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November 9, 1987 l
Mr. D. Rex Gleason Regional Engineer Water Quality Section Mooresville Regional Office Division of Environmental Management Dephrtment of Natural Resources and Community Development 919 North Main Street Mooresville, N.C.
28115
SUBJECT:
McGuire Nuclear Station
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Chemical Release File:
MC-118.02-1, MC-208.20, MC-702.26
Dear Mr. Gleason:
On October 23, 1987 you were informed of a chemical release at McGuire Nuclear Station to the Catawba River through the Collection Basin.
This letter is a
follow-up to the telephone notification.
During the weekend of October 16, 1987 McGuire Nuclear
. Station was filling one of the steam generators on Unit 1.
The water contained hydrazine.
During the filling process, the solution began leaking through a check valve.
The steam generator was then drained to a secondary totally enclosed structure within the plant.
This structure drains to a sump that discharges to the conventional wastewater treatment system.
However, the floor drain in this structure was clogged.
On October 18, 1987, shift management made the decision to pump the solution from the structure to the Auxiliary Building roof drain.
For approximately an eight hour period an estimated 10,000 gallons of the solution was pumped to the roof drain that discharges to the Collection Basin (CB) via the yard d rain s.
The CB discharges to the Catawba River.
permitted discharge point.
Currently the CD is not a
However, an application has been submitted to the Division of Environmental Management to repermit this discharge 8711160211 e71109 PDR ADOCK 05000369 0
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point.
Additionally, we have an instream administrative limit of 0.06 mg/l for hydrazine that has been approved by the Division of Environmental Management.
The discharge y
concentration was calculated to be less than the 4
administrative limit.
The-facts and sequence of events which led to ~ this unauthorized discharge are under investigation.
Duke Power.
concludes that this release posed no threat to the public j
health or the environment.
(
Sincerely,
'rt N L ~
i W.A. Haller, Manager i
Nuclear Technical Services
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WTG/rhm 1
xc Dennis Ramsey Document Control Desk i
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