ML20086K877

Environ RO 74-1:on 740601,oil Noted in Plant Discharge Canal North of Intake Structure.Caused by Separator Receiving 100% Oil & Discharging Total Oil Flow Into Storm Sewer. Oil Booms Deployed

ML20086K877
Person / Time
Site:	Peach Bottom
Issue date:	06/11/1974
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Giambusso A US ATOMIC ENERGY COMMISSION (AEC)
References
RO-74-1, NUDOCS 8402070029
Download: ML20086K877 (3)

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PHILADELPHIA. PA.19101 g (2151841-4000 June 11,1974 1 Mr. A. Glambusso Deputy Director of Reactor Projects 50-277 United States Atomic Energy Comission I

Directorate of Licensing Washington, DC 20545

Subject:

Environmental Deviation The following deviation was reported to Mr. Phil Stohr, A.E.C.

peninn i pan.ii a rney nnar at i nn= nefica nn p .n.  ?, ig7h. ra = c ce.-d 2., ca with Section 7.4.2.A of the Technical Specifications, Appendix B of DPR-44 for Unit 2 Peach Bottom Atomic Power Station, the following report is being submitted to the Directorate of Licensing as an Environmental Deviation.

Reference:

License Number DPR-44, Amendment Number i Environmental Technical Specification Appendix B, Paragraph 4.2 Report No.: 50-277-74-1 Report Date: June 11, 1974 Deviation Date: June 1, 1974 Faci li ty: Peach Bottom Atomic Power Station R. D. 1, Delta, Pennsylvania 17314 Identification of Deviation:

' Oil noted in plant discharge canal just north of the Unit 1 intake structure.

Conditions Prior to Deviaticn:

Plant shutdown for a scheduled maintenance outage.3 One cifcu-lating water pump in service. 4 ,t ' O p p" g 8402070029 740611 PDR ADOCK 05000277 S PDR g Q "q COPY SENT REGION ,

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'Mr. A. Gitmbuss June 11, 1974

• Page 2 Description of Deviation:

During a routine inspection of the plant shoreline and internal water basins, oil was noted flowing from a drainage pipe approximately 60 feet north of the Unit 1 forebay.

Designation of Apparent Cause of Deviation:

An investigation following the initial containment of the oil being discharged identified the source of the oil as coming from the diesel generator building via a Zurn Oil Separator. The separator is designed to separate oil from the water, discharge the oil to an under-ground 500 gallon tank, and discharge the clear water to a storm drain system. The investigation revealed that lubricating oil from the diesel strainers was being drained via installed piping to the diesel building floor drain system as part of maintenance work associated with the yearly diesel preventative maintenance program. This work was done in conjunction with cleaning the tube oil strainers of each diesel generator. Each filter container and associated piping holds approxi-mately 25 gallons of tubricating oil. Four containers had been drained to the floor drain system during the maintenance work. The floor drain system transported this oil to the Zurn Separator. The separator, by design, relies on a water-oil interface to separate the oil from the water and di: charge the oil to tne collection tonk. Because the seoa-rator at this point was receiving almost 100% oi l , it discharged the total oil flow to the storm sewer.

Analysis of Deviation:

A routine inspection of the shoreline and internal water basins identified the oil. Prompt deployment of the emergency oil booms on site contained the oil in the discharge canal before significant amounts entered the river. An area approximately 50' x 100' with a very thin oil sheen was observed downstream of the discharge structure. Consultants (Underwater Technics, Inc.) who were contracted to aid in the clean-up indicated that this oil sheen was not detrimental to the environment.

An inspection of the Department of Environmental Resources of the State of Pennsylvania who made an inspection of the site on June 2, agreed with this conclusion. Because no significant gaantities of oil were discharged to the river as a result of this deviation, no damage was done to the environment.

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Corrective Action:

Following the deployment of the oil booms as indicated above, clean-up operations were started immediately. A consultant (Underwater Technics, Inc.) was called and responded with men and equipment. By

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,Mr. A. Giambusso June 11, 1974 Page 3 L

1 6:00 a.m. on 6/2/74, only a light sheen remained in the discharge canal and downstream of the discharge structure. A total of 90 gallons of oil was removed from the discharge canal at the two locations.

Additional oil was removed from the oil separator and a basin in the storm sewer system downstream of the oil separator. Essentially all of the oil lost from the diesel generators was recovered.

In order to prevent a recurrence, the drain piping from the various cil systems within the diesel generator buildings will be cut, capped, and identified as oil drainage points. Future maintenance operations will drain this oil to suitable containers within the diesel generator buildings and not to the Zurn Separator. Additionally, an oil boom will remain in place in the discharge canal near the storm sewer drainage pipe.

Very truly yours, YY YWp< t f M.yJ. Cooney I A n't Gen'l Superintendent Generation Division cc: Mr. J. P. O'Reilly Director, Region 1 United States Atomic Energy Commission 631 Park Avenue King of Prussia, PA 19406 4

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