ML20205R198

Requests That Dept of Environ Conservation Modify SPDES Permit for IPS IAW Proposed Rev Attached & Described as Listed

ML20205R198
Person / Time
Site:	Indian Point
Issue date:	04/15/1999
From:	Kahabka J POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	Duke M NEW YORK, STATE OF
References
NUDOCS 9904220216
Download: ML20205R198 (6)

Text

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123 Main Street White Plains. New York 10601 914 681.6200 a

1. > NewYorkPbwer 4ff Authority i

April 15,1999 Ms. Margaret Duke New York State Department of Environmental Conservation Region No. 3 21 South Comers Road New Paltz, New York, 12561-1696

Subject:

New York Power Authority and Consolidated Edison Indian Point Nuclear Power Piar.ts SPDES Permit Modification Reouest - Permit No. NY-0004472 l

Dear Ms. Duke The New York Power Authority (NYPA) and Consolidated Edison (Con Edison) request that the Department modify the State Pollutant Discharge Elimination System (SPDES) Permit for the Indian Point Generating Station in accordance wita the proposed revision attached to this letter and described below.

Part i Chance in Facility and Effluents for the Joint Contractor Water Factory Currently, Con Edison (Units 1 & 2) and NYPA (Unit 3) each process their own water, they treat city drinking water for use in the plant systems. We now propose to eliminate our individual treatment systems and install a joint water treatment system. This process will consist of proprietary dual media filtration, activated carbon, reverse osmosis, softeners, EDI, and mixed bed polishing. (Attachment I-Process Flow Diagram). The system is designed to process up to 300 GPM of city water. The purified water stream will provide make-up water to both Unit Nos. 2 and 3. The process waste streams will consist of an intermittent discharge of approximately 6500 Gal of filter back-wash water and a continuous reverse osmosis reject stream of approximately 135 GPM. The 6500 Gal of filter back-wash water containing elevated levels of Total Suspended Solids (TSS) will be directed to the Unit No.

l 3 Waste Neutralization Tank and discharged at Outfall 001E. The current SPDES permit TSS limits of 30 mg/l daily average and 50 mg/l maximum for Outfall 001E will be maintained.

The reverse osmosis reject stream consisiing of cleaned (filtered) city drinking water; wil! be added to Outfall 001 via a proposed new sub Outfall 001N, at a rate of approximately 135 GPM. Since this water will have been processed through the reverse osmosis system, it will have some dissolved solids 0

but is not expected to contain any suspended solids. At a continuous discharge this would mean an f0 average of.194 MGD of water added to 001. A summary of the resultant effluent parameters expected L/

is provided in Attachment 2.

The net result of the proposed m ifi on will be the elimination of Con Ed's outfall 001E effluent during normal operations. However, the additiona! water-making capacity needed during start up of IP2, will require output of wastewater via that c. fall, for short periods during start-up.

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The former outfall 001E was for 'Make Up Water lon Exchanger Regeneration Wastes" and was

. broken down into Unit 1&2, and Unit 3 effluent streams. The proposed modification will combine these outfells into a single unit. The net result will be a decrease in the anticipated daily flows and total amounts discharged via outfall 001E.

Part 11 - Boron Effluent Boron Effluent Limitations for Outfall 001 and the Sum of 001B,001C,001D, and 001L - The SPDES permit requires that the boron concentration in the discharge canal (Outfall 001) be calculated weekly to assure that releases are at or below the daily maximum discharge limitations. The SPDES permit also has a requirement of one weekly grab sample to monitor the concentration of boron in the of sum of intemal waste streams 001B,001C,001D, and 001L, although there is no discharge limitation that must be met for these intemal waste streams. In addition, boron Ra be released via intemal waste stream 001J if a chemical batch tank is drained at Unit 3. Discharges via 001J are very infrequent (only when Unit 3 is shut down) and limited in quantity by tank size. [The maximum discharge of boion via this pathway would be 20 pounds.) Therefore '. hey would have a minimal effect on the daily maximum

- concentration 'n Outfall 001. Boron released from 001J can be accounted for by measuring each

. release and including the calculated boron concentration with the sum of outfalls 0018,001C,001D, 001L, and discharges from the chemical batch tanks entering 001J from Unit 3. Therefore NYPA suggests that footnotes (n) and (e) be revised as stated on Attachment lli.

. The modifications to the SPDES permit requested are intended to reduce the cost operating Indian Point, without sacrificing protection of the environment.

Please call me at (914) 681-6308, if you have any questions.

John Kahabka Sup isor Environmental Programs cc:

Mr. Paul Kolakowski New York State Department of Environmental Conservation Albany, NY,12233-3505 Mr. Chris English Environmental Manager Consolidated Edison, Indian Point 2 Broadway & Bleakly Avenue Buchanan, NY, 10511-1099 U.S. Nuclear Regulatory Commission e

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ATTACHMENT 11 EFFLUENT PARAMETERS RESULTING FROM THE NEW WATER TREATMENT SYSTEM Average Flow Max Flow (MGD)

(MGD)

Intermittent discharges via 001E:

Average Discharge Frequency 5/ week Max Discharge Frequency 2/ day Flow Rate (gpm) 400-800 4

Duration (minutes) 28 - 56 Max Volume per Discharge (gal) 22,500 Average Daily Flow (gal) -

22,500 Max Daily Flow (gal) 90,000 001N RO reject stream

.155 0.194 f.

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1 ATTACHMENT lli PROPOSED REVISION TO SPDES PERMIT # NY 000 4472 Outfall Number &

Discharge Limitations Units Minimum Monitoring Effluent Parameter Daily Avg. Daily Laax

' Measurement Sample Freauency Tvoe

[ REVISE:]

Sum of 0018. 001C. 001D. 001L & 00J Flow monitoring only MGD Weekly Instantaneous Boron monitoring only mg/l Weekly Grab" Where footnote "n" states:

"One flow proportioned composite sample shall be obtained from one grab sample taken from each of the intemal waste streams 001B,001C,001D,001L, and each release from the chemical batch tanks at Unit 3 into 001J."

l

AND

001 Discharae Canal j

Where footnote "e" states:

"The calculated quantity of this substance in this discharge shall be determined by using the analytical results obtained from sampling that is to be performed on intemal waste streams 001B,001C,001D,001L & releases from Unit 3's chemical batch tanks into 001J."

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