ML20046D224
| ML20046D224 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 08/04/1993 |
| From: | Atherton N DUKE POWER CO. |
| To: | Gleason R NORTH CAROLINA, STATE OF |
| References | |
| NUDOCS 9308160358 | |
| Download: ML20046D224 (4) | |
Text
a Duke Ibuer Company Genemtion Services Department 13339 Hagets ferry Road Hunterwdie, hc28078-1929 OUKEPOWER August 4,1993 Mr. Rex Gleason Regional Manager Water Quality Section Department of Environment, Health and Natural Resources 919 North Main Street Mooresville, N.C. 28115
Subject:
McGuire Nuclear Station NPDES Permit NC0024392 Exceedances File: MC 702.13 z
Dear Mr. Gleason:
Pursuant to Part II, section D (6)(d) of the subject permit, this is a follow-up written report for recent noncompliances at the McGuire Nuclear Station. The initial l
notifications were made to Mr. Richard Bridgeman on July 21,1993, and to Mr. Mike Parker on July 22,1993, by Norma Atherton of Duke Power Company.
On July 21st, our Bioassay Laboratory notified us of a failure of a chronic toxicity test on combined samples collected from the Waste Water Collection Basin (WWCB),
Outfall 005, on July 13 and 19,1993. The failure was due to an observable inhibition of reproductivity in the Daphnia and not due to significant mortality.
McGuire Nuclear Station began unwatering a unit to the WWCB on the weekend of July 17th as a part of station activites. This unwatering process lasts for ti/o weeks. It is very unlikely that the source of this test fa' lure is still p:xsent in t'2e WWCB due to the very Mgh flow rates produced during this activity. As requirud by the permit, monthly anitoring will begin immediately until such time a single test is passed.
On July 22,1993, our Scientific Services laboratory notified us of an exceedance c,f the daily maximum fecal coliform limit of 400 colonies /100 ml on McGuire's sanitary system (WT), Outfall 003. The fecal caliform value observed was >2400 col /100 ml on the sample which had been collected on July 20, 1993.
Another sample was collected on July 22 for a repeat analysis. The results of the repeat analysis was (2 col /100 ml.
It can not be determined what caused this exceedance since all operating parameters of the sanitary system, including chlorine, were within normal limits.
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There was no environmental impact to the receiving waters as a result of thiF, incident. If you should need additionalinformation or have questions, please contact Norma Atherton at (704) 875-5963.
Sincerely, h d.
Norma G. Atherton, Scientist-Environmental Division, Water Protection Group
'l Generation Services Department i
ec: Mr. Randy Kepler - NCDEHNR - Raleigh, N.C.
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U.S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation i
Washington, D.C. 20555
_ Nuclear Regulatory Commission Document Control Desk i
U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. Kim Van Doorn NRC Resident Inspector McGuire Nuclear Station 12700 Hagers Ferry Road Huntersville, N.C. 28078 U.S. Nuclear Regulatory Commission 101 Marietta St., NW, Guite 2900 Atlanta, Georgia, 30329 h
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