ML022940411

Njdes Discharge to Surface Water Permit NJ0005550 Removal of Dilution Pumps from Service

ML022940411
Person / Time
Site:	Oyster Creek
Issue date:	10/04/2002
From:	Harkness E AmerGen Energy Co
To:	Hoffman J Office of Nuclear Reactor Regulation, State of NJ, Dept of Environmental Protection
References
2130-02-20289, NJ0005550
Download: ML022940411 (4)

Text

AmerGen Energy Company, LLC An Exelon/B ritish Energy Company Oyster Creek US Route 9 South P.O Box 388 Forked River, NJ 08731-0388 October 4, 2002 2130-02-20289 Mr. Jeffery Hoffman Bureau of Standard Permitting Division of Water Quality New Jersey Department of Environmental Protection CN-029 Trenton,-NJ 08625-0029

Subject:

Oyster Creek Generating Station NJPDES Discharge to Surface Water Permit NJ0005550 Removal of Dilution Pumps from Service On September 23, 2002, the Oyster Creek Generating Station dilution plant was secured to allow for maintenance to increase the level of safety during the upcoming refueling outage. The purpose of the maintenance was to increase the reliability of a transformer and associated electrical equipment which tie the Oyster Creek site to the off site grid. At 2:37 AM, the transformer was removed from service for maintenance. De-energizing this transformer removes power to the dilution plant. With no dilution pumps operating, the Discharge Canal temperature at the U.S. Route 9 Bridge rose to approximately 101 'F in one hour. When the water temperature at the Route 9 bridge exceeds 97 'F, as specified in Part IV-B/C.4.A of NJPDES Permit NJ0005550, it is reportable under Part IV-B/C.4.B(1) of that permit. All maintenance on the transformer was terminated and work began immediately to repair the transformer and restore power to the dilution pumps.

The increase in the discharge canal temperature caused a fish kill. The NRC and NJDEP were notified of the fish kill. Concurrently, the clean up of the fish commenced. The transformer was returned to service at 6:39 PM on September 23, 2002. The #3 Dilution Pump was placed in operation at 8:37 PM, and by 9:15 PM, the Route 9 Bridge water temperature had decreased to 970 F. The No.2 Dilution Pump was subsequently returned to operation at 10:14 PM.

The fish were counted, classified, and removed by the end of the day on September 25, 2002. A total of 5838 fish, composed of 23 species, were killed.

C321-02-20289 Page 2 An internal investigation was initiated on Monday, September 23, 2002, to determine the cause of the event. The preliminary results of the investigation have identified possible corrective actions that should prevent recurrence involving both administrative and system modifications.

These corrective actions will be evaluated and implemented as appropriate. The final results of the investigation will be included in the Technical Specification required 30 day report.

If any further assistance or information is required, please contact John Rogers, of my staff, at 609.971.4893.

Sincerely, Ernest J. Harkness Plant Manager OCGS Cc: Van Sciver, H.E.

Administrator, USNRC Region 1 Senior NRC Resident Inspector Senior Project Manager, USNRC NRR Nuclear Environmental Kennett USNRC Document Control Desk; Docket 50-219

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P Oyster Creek Licensing Correspondence Distribution Sheet File No. 02070 Letter Date 10/04/2002 Reference/Letter No. 2130-02-20289 Date Sent / Received 10/04/2002 Title

Description:

Fish Kill of 09/23/2002 - Ten Day Report LICENSING ENGINEER: John Rogers SPECIAL NOTES:

Office of the President Oyster Creek R. J. DeGregorio (Letter Only) OCAB2 X E. Harkness MOB X R. Maldondo OCAB2 M. Trum MOB X Communications OCAB2 X C. Wilson MOB X

- R. Brown -MOB ,--_ X _

Engineering J. Vaccaro MOB V.Aggarwal OCAB3 X J..Bobba AOB M. Newcomer OCAB3 X A. Krukowski NMB A. Agarwal OCAB3 R. Ewart OCAB2 D. Barnes OCAB3 G. True Whse 2 T. E. Quintenz OCAB3 D. Norton Whse 1 M. Button OCAB3 X W. Collier AOB Aux X F. Buckley OCAB3 D. McMillan Bldg 12 T. Powell OCAB3 J. Magee NMB X R. Larzo OCAB3 M. Massaro OCAB2 X C. Lefler OCAB3 R Adams - OCAB2 X M. Moore AOB AmerGen/Exelon -Other.--.

C. Pardee KSA 3-N NSRB (22 copies) X G. Vanderheyden KSA 3-N _ ,Steve Bailey AOB X M. Gallagher (Outgoing Only) KSA 3-E X D Weigle AOB X J. Hufnagel (Outgoing Only) KSA 3-E X M Browne AOB X D. Walker KSA 3-E X KS Document Ctr KSA 1-N X I Toncic KSB 3-W

--. DDistel ... KSA3E -...

Jeff Benjamin Cantera' External Distribution NJBNE - K. Tosch X INPO ANI - R. Oliveira BPU - R. Chilton T. Gould GE - P. Ray

Reference:

TSCR 301 File Index Number: 20.16.01.01 Cross Reference Number: 20.16.01.01,:

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