ML20196H600
| ML20196H600 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 03/07/1988 |
| From: | Haller W DUKE POWER CO. |
| To: | SOUTH CAROLINA, STATE OF |
| References | |
| NUDOCS 8803110156 | |
| Download: ML20196H600 (3) | |
Text
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Duxe Powen COMPANY P.O.140X 33189
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WILLIAM A. HALLER '
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March 7, 1988 South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, S.C.
29201 ATTENTION: NPDES Administrative Section
SUBJECT:
Catawba Nuclear Station Conventional Wastewater Treatment System (WC)
Noncompflance Notification File: CN-702.26
Dear Sir:
In accordance with Part II.B.2 of the Catawba Nuclear Station NPDES permit
-(SC0004278) as a follow-up to the telephone notification to the Catawba District Office, Fort Lawn, S.C., this is to notify you of a noncompliance incident at the Catawba Nuclear Station.
Information related to the incident is as follows:
Discharge The discharge was the Conventional Wastewater Treatment System (WC, discharge 002) into Lake Wylie.
Cause of Noncompliance The discharge contained a hydrazine concentration of 8.0 mg/1.
Based on the flowrate and duration, the calculated quantity of hydrazine discharged was approximately 68 pounds.
Date and time The WC system discharge began at 2140 hours0.0248 days <br />0.594 hours <br />0.00354 weeks <br />8.1427e-4 months <br /> on February 29, 1988.
The discharge was terminated at 0920 hours0.0106 days <br />0.256 hours <br />0.00152 weeks <br />3.5006e-4 months <br /> on March 1,1988 when hydrazine was discovered within the system.
j Duration The duration was approximately 11 hours1.273148e-4 days <br />0.00306 hours <br />1.818783e-5 weeks <br />4.1855e-6 months <br /> and 40 minutes.
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T Prevention once hydrazine was discovered in the B-pond of the WC System, the discharge was terminated.
Administrative precautions were imediately taken to alleviate the current. event.
Also, internal investigations have been 7
initiated to determine and correct deficiencies that led to this release, When the investigations are complete, additional administrative controls f
will be implemented to prevent future occurrences.
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Suman The WC system consists of (1) a 300,000 gallon Initial Holdup Pond, (2) two (2) five-million gallen Settling Ponds, and (3) a 1.5 million gallon Final Holdup pond.
The A-pond and the Final Holdup pond were at full capacity k
and out-of-specification for release.
They were being recirculated for treatment.
DHEC had given approval to discharge hydrazine up to a N
concentration of 0.43 mg/1.
The B-pond was sampled and analyzed on February 29, 1988 and determined to be within specification for release for the normal NPDES parameters as well as hydrazine.
In order to prevent all 2
ponds from filling and thereby leaving no capacity to receive wastewater from the station, it was decided to discharge the B-pond as it received wastewater f rom the station.
In the meantime, a vessel thought to contain only condensate was drained to the WC system.
The vessel, however, "g
contained hydrazine.
1988 a cocposite sample of B-por d was analyzed for hydrazine.
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On March 1, The hydrazine concentration was 8.0 mg/1.
Immediately, a discharge sample was collected and the discharge was stopped at 0920 hrs.
The results of m
the analysis of the discharge sample was also 8.0 mg/1.
Between 1000 and
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P 1115, samples were taken in Lake Wylie approximately 2 feet from the WC discharge and downstream at the radiological sampling point.
The results g
of the analyses were 0.108 mg/l and no detectable hydrazine, respectively.
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In the discharge cove, approximately six small bream and several dozen threadfin shad were observed dead.
A more complete investigation by Duke r
Power Biologists revealed that threadfin shad were observed dead in other t
areas of the lake unaffected by the discharge.
This would indicate that their deaths were due to natural conditions such as low water temperatures.
5 All appropriate State, County, and Federal officials were notified of this E
event.
Should you desire additional information or have any questions f
please contact R.T.
Simril
[(704) 373-2310]
or M.C.
Griggs
[(704) 373-7080].
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2 Sincerely, d;
& (b W.A. Haller, Manager Nuclear Technical Services M
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A.L. Williams - Fort Lawn, South Carolina Document Control Desk, NRC l
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