ML20106F371
| ML20106F371 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 02/08/1985 |
| From: | Haller W DUKE POWER CO. |
| To: | NORTH CAROLINA, STATE OF |
| References | |
| NUDOCS 8502130511 | |
| Download: ML20106F371 (2) | |
Text
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DUKE POWER GOMPANY NUGLEAR PRODUGTION DEPARTMENT P.O. BOX 33189,422 50UTH CHURCH STREET CHARLOTTE, N.C. 28242 (704) 373-4011 February 8, 1985 Division of Environmental Management Water Quality Section P.O. Box 27687 Raleigh..NC 27611
SUBJECT:
Noncompliance Notification McCuire Nuclear Station File: MC-704.20
Dear Sir:
This is to notify you of a noncompliance incident at McGuire Nuclear Station.
Information related to the incident is as follows:
Discharge The discharge was the conventional wastewater treatment facility effluent (discharge 002).
Cause of Noncompliance The pH of the effluent was less than 6.
The actual pH was 5.6.
The carbon dioxide addition system malfunctioned allowing unnecessary CO2 addition when the controlling pH instrument lost flow.
Date and Time The incident was discovered at 9:00 AM, February 4, 1985.
It is esti-mated that the duration was less than 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> (less than 311000 gallons).
Prevention Flow to the pH controller was re-established which terminated the CO2 feed. The situation is being investigated and changes will be implemented to prevent future occurrences because of these conditions.
Summary Discharge from the conventional wastewater treatment facility was started February 3, 1985 at 9:15 PM.
The ef fluent pH was 7.0 at a flow of 432 gpm.
At 9:00 AM on February 4, 1985, it was discovered that CO2 was being added at 86 percent of capacity. A grab sample for pH revealed the pH was 5.6.
Action was immediately taken to re-establish flow to the pH instrumentation which caused an automatic termination of CO2 feed resulting in a discharge of pH 6.2.
8502130511 850208 i*
POR ADOCK 05000369 i0 a
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- Division of Environmental Management
SUBJECT:
[ Noncompliance Notification
' February 8, 1985 Page 2 The maximum quantity of water discharged during the 12-hour period _was 311,000' gallons. The discharge of low pH water resulted_in a minimal-impact on_the environment for several reasons including (1) aeration of the' sample eliminated the CO, (2) the total acidity (to 8.3) was low, 2
and-(3) flow from the collection basin was high (900 gpm) because of recent
. rains which provided dilution at a pH of 7.0.
Sincerely, k_ N M
W. A. Haller, Manager Nuclear Technical Services WTG/wmc cc Rex Gleason i
Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.
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