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Provides Addl Info Requested During 950705 Telcon Re Essential Maint to Be Performed on Perry Nuclear Power Plant Svc Water & Circulating Water Sys
	ML20086P636
Person / Time
Site:	Perry
Issue date:	07/21/1995
From:	Shelton D; CENTERIOR ENERGY
To:	Underwood M; OHIO, STATE OF
References
	PY-CEI-OEPA-022, PY-CEI-OEPA-22, NUDOCS 9507270082
	Download: ML20086P636 (5)
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W CENTERDOR ENERGY Donald C. $heltOn Mail Address:

PERRY NUCLEAR POWER PLANT PO. BOX 97 SENIOR VICE PRESIDENT 10 CENTER ROAD PERRY, OHIO 44081 NUCLEAR PERRY, OHtO 44081 i

'0116) 259-3737 July 21, 1995 PY-CEI/0 EPA-0226L Attention: Marie Underwood Ohio Environmental Protection Agency Northeast District Office 2110 East Aurora Road Twinsburg, Ohio 44087 r Perry Nuclear Power Plant NPDES Permit No. 3IB0016*DD Essential Maintenance Discharge Change Ladies and Gentlemen:

Following is the additional information you requested during our phone conversation on July 7, 1995 about essential maintenance to be performed on the Perry Nuclear Power Plant service water and circulating water systems.

Item 1: Anticipated solids and removal method Solids are expected to have accumulated in the cooling tower basin, and vill consist primarily of pieces of transite board broken from the baffle plates above the tower basin. Other solids include debris that has blown into the tower basin (leaves and sticks, trash). These materials will be readily apparent during the pumping process. The work supervisor vill direct draining activities to ensure that solids are not discharged. ,

Solids are shoveled into containers and disposed of in accordance with l plant policy on handling asbestos containing materials.

Item 2: Time period for system drainage and gallons per day flow Approximate volumes and flows have been refined since the initial request was submitted (PY-CEI/0 EPA-0223L, 5/31/95). Flow to the storm drain system on the east side of the plant site vill total 2,200,003, gallons to be pumped at approximately 420,000 gallons per day for five days (starting on or near January 16, 1996) and 10,000 gallons per day for ten days (starting on or near January 25, 1996).

Plov to the storm drain system on the vest side of the plant site vill total 260,000 gallons to be pumped at 26,000 gallons per day for ten days (starting on or near January 25, 1996).

Note that the total flow is 1,050,000 gallons less than originally estimated.

opewg compan.es ci e ona Dec n N m morno 9507270002 950721 \

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PY-CEI/0BPA-0226L June 21, 1995 Page 2 of 2 Item 3: Detail on impoundments with respect to erosion control The storm drain sys' tem on the east side of the plant site (minor stream impoundment) drains to a small, nameless stream that originates offsite.

This stream was rerouted and channelized during plant construction, at which time the sediment control dam and skimmer plate were installed. As l detailed in Attachments 1 and 2, the channelized portion of the stream !

(from transect A north to the inlet to Lake Erie) is lined with riprap !

one and one half feet thick extending the twenty feet across the bottom !

and at least three feet up each side of the channel. The storm drain inlet is located at transect B. The channelized portion of the stream ,

bed is also densely grown in with phragmites (a reed that grows well in i vet areas), which slows flow considerably prior to reaching the sediment i dam.

The riprap barrier minimizes the addition of suspended solids from !

erosion along the stream bank; however, any solids present will settle along the stream bed or in the pond behind the sediment dam.

The storm drain system on the vest side of the plant site (northwest >

drain impoundment) empties into an impoundment pond that is fed only by storm vater runoff from the site. Also built during plant construction, it also has a sediment control dam and skimmer plate. As detailed in ,

Attachment 3, the entry to the pond consists of a corrugated pipe five feet in diameter which opens onto an eighteen inch thick riprap sluice approximately fifteen feet long prior to entry into the pond. The riprap sluice prevents bottom sediment in the pool from being disturbed by inflowing water. i Since planning for the January outage has already begun, and this is a key step in the maintenance schedule, a response is requested at your ,

earliest convenience. 5 If you have questions or require additional information, please contact Louise Barton at (216) 280-5512. ,

Very truly .ours, U WM D C SHaTCA/

LKB:sc r

Attachments cc: NRC Document Control Desk (Docket No. 50 440) !

NRC Project Manager NRC Resident Inspector Office NRC Region III

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