ML20206C987
| ML20206C987 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 04/27/1999 |
| From: | Gallagher M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Oneil S PENNSYLVANIA, COMMONWEALTH OF |
| References | |
| NUDOCS 9905030266 | |
| Download: ML20206C987 (2) | |
Text
m (af$hael P. GaHagher. P.E.
14 g.
Plant Manager Limerick Garcrating Sta: ion k
PECO NUCLEAR-
"'co "" 'av cama "v Lrnanck Generating Station
' A Unit of PECO Energy.
[g3719464 0920 d
p 61o 718 2000 April 27,1999 Steve J. O'Neil-Chief, Operations Section Department of Environmental Protection
. Water Management Program
' Suite 6010, Lee Park 555 North Lane Conshohocken, PA 19428
SUBJECT:
' Limerick Generating Station NPDES Permit No. PA0051926 Exceeding daily maximum concentration for BETZ 3625 Biocide.
Dear Mr. O'Nell:
On March 19,1999, station personnel observed foam emanating from a manhole vent associated with Outfall 001, no foam was observed on any waterway. A sample of Outfall 001 was analyzed for BETZ 3625 and the value exceeded the daily maximum limit of 0.4 ppm for 2.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />. This is in violation of Part A of NPDES Permit PA0051926 which requires the maximum daily concentration of 0.4 ppm for BETZ 3825 during chemical addition.
Following discovery of the foaming event, a sample was taken from each cooling tower and the spray pond to identify the source of BETZ 3625 in the outfall. Test results indicated that the spray pond was the source of the chemical. Approximately one hour before the sample, a batch addition of BETZ 3625 was made to the spray pond. The spray pond was being fed with water to reduce conductivity, this caused a short cycle of chemical to the spray pond overflow. The next sample taken at Outfall 001 was within specification for daily maximum limit and a review of the monthly average was within permit requirements.
The cause of this violation was the inappropriate addition of BETZ 3625 to the Spray Pond' during a bleed and feed evolution. Normally the spray pond does not overflow, therefore the addition of BETZ 3625 does not have an effect on Outfall 001.
Supervision has prohibited the addition of BETZ 3625 during spray pond bleed and feed
. evolutions. The procedure goveming the addition of chemicals will be modified to prevent i
addition of biocides during bleed and feed operations, if there are any questions please do not hesitate to contact Mr. David J. Piller at (610) 718-2711.
O Sincerely, Michael P. Gallagher
/
Plant Manager, Limerick Generating Station qf'
/
9905030266 990427 ADOn Ogg n
PDR S
L
ae NPDES Permit No. P0051926 r
. April 27,1999
. Page Two s
cc:
U.S. Nuclear Regulatory Commission Document Control Desk Docket Nos. 50-352/352 Washington, D.C. 20555 H. J. Miller Administrator, Region I, USNRC Docket Nos. 50-352-353 A. L. Burritt USNRC Senior Resident inspector, LGS f
Docket Nos. 50-352/353 Program Management Section (3WM52)
Permits Enforcement Branch Environmental Protection Agency Water Management Division Environmental Protection Agency Water Permits Section Region til 841 Chestnut Building Philadelphia, PA 19107 l
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