ML20137M551

NPDES Noncompliance Notification:On 970228,flow Integrator Used to Measure Spray Pond Effluent Flow Was Identified to Be Malfunctioning & Declared Inoperable Due to Lodged Debris.Revised Procedure for Spray Pond Effluent Flow

ML20137M551
Person / Time
Site:	Limerick
Issue date:	03/27/1997
From:	Boyce R PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Oneil S PENNSYLVANIA, COMMONWEALTH OF
References
NUDOCS 9704080119
Download: ML20137M551 (4)

Text

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Robert W.Boyce

• Plant Manager m - G - sm  ;

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PECO NUCLEAR esm mv %nv Lmenck Generating Staten 4 A Unit of PECO Energy PO Box 2300 i Sanatoga. PA 19464 0920 i 610 718 2000 March 27, 1997 i Steven J. O'Neil Chief, Operations Section Department of Environmental Resources Bureau of Water Quality Management Suite 6010, Lee Park ,

555 North Lane Conshohocken, PA 19428

SUBJECT:

Limerick Generating Station, Unit 1 and 2 Noncompliance of NPDES Permit No. PA-0051926 r

Dear Mr. O'Neil:

]

Descriotion of the Noncomoliance:

On February 28, 1997, the flow integrator used to measure )

Spray Pond effluent flow was identified to be malfunctioning and was declared inoperable. A subsequent evaluation determined that the flow integrator had been inoperable since January 7, 1997. This instrument, required by Part A of the permit, is used to measure the contribution of Spray Pond flow to the total integrated flow at Discharge 001. To ensure compliance with Part A, Discharge 001 flow is required to be measured once per week. Until repairs to the instrurent were completed, an alternate method of determining the Spray Pond effluent flow was performed weekly using measurement of the water height over the Spray Pond discharge weir. On March 6, 1997, repairs to the flow integrator were completed, and the instrument was declared operable.

Cause of the Noncomoliance: d??

The Spray Pond flow integrator was malfunctioning as a result of debris lodged within the instrument's flow port. l Previous corrective actions for minimizing flow integrator malfunctions due to debris and for increased monitoring of i 9 i the flow integrator readings to detect malfunctions were not effective in identifying incorrect flow integrator readings.

9704090119 970327 PDR S ADOCK 05000352 I pop '

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March 27,-1997 Page 7%o Actions To Prevent Recurrence:

The procedure for recording.the Spray Pond effluent flow has been revised to perform further investigation of the Spray Pond overflow when the flow integrator reading does not change:over a week's time. If actual Spray Pond overflow effluent is discovered without a change in the flow integrator, the flow rate will be determined by measuring the height of water over the Spray Pond discharge weir, the flow integrator instrument will be inspected, and the System Manager will be notified.

An Engineering Change Request (ECR) has been initiated for the design and installation of a screen at the Spray Pond overflow weir to minimize debris entering the flow integrator. This ECR is expected to be implemented by August 31', 1997.

If there are any questions'please do not hesitate to contact Mr. James L. Kantner at (610) 718-3400.

Sincerely, R W. Boyce DMS/DBN/cah i 4

-Mhrch 27, 1997-Page Three Lcci..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 N. S. Perry .

USNRC Senior Resident Inspector, LGS

~ 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 III 841 Chestnut Building Philadelphia, PA 19107

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