ML20138F027
| ML20138F027 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 03/26/1997 |
| From: | Scace S NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES SERVICE CO. |
| To: | Grier J CONNECTICUT, STATE OF |
| References | |
| SES-97-GN-049, SES-97-GN-49, NUDOCS 9705050238 | |
| Download: ML20138F027 (2) | |
Text
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f 107 seidea street, Berlin, cr 06037 t[ Norilietist Utilities S*cm Northeastunhtie service company P.O. Box 270 ilartford, Cr 06141-0270 (203) 665-5000 l
1 March 26,1997 SES-97-GN-049 D10935 Mr. James Grier Supervising Sanitary Engineer Water Management Bureau Department of Environmental Protection 79 Elm Street Hartford, CT 06106-5127 Reference 1 Letter D10751 from S. Scace to J. Grier dated February 11,1997 Reference 2 Letter D10837 frori S. Scace to M. DiNoia dated February 24,1997 i
Dear Mr. Grier:
Northeast Nuclear Energy Company (NNECO) has previously discussed with you the discharge via DSN 001B-9 of certain wastewaters due to maintenance activities associated with the heat exchangers at Unit 2 (References 1 and 2). These activities
[0 include draining of seawater (i.e., sen/ ice water) from the "B" Reactor Building Closed Cooling Water (RBCCW) heat exchanger inlet pipe, the seawater side of the "C" RBCCW heat exchanger, the seawater side of the "B" Unit 2 emergency diesel generator, and high pressure washing using either demineralized or domestic water (hydrotazing). Due to some or all of these maintenance activities, the normal pathway (DSN 0018-5) could not be used and these wastewaters were directed to the RBCCW g.%3 sump and discharged from DSN 0018-9. Consistent with our past approach for these types of activities, the titration method was used for analysis of hydrazine. At the time of discharge, hydrazine was not detected (<0.350 ppb).
NNECO has previously (Reference 2) provided written notification of a discharge from the Unit 2 RBCCW sump (DSN 001B-9) which occurred on February 18,1997. The following provides information with respect to each additional discharge occurring after February 18,1997 as a result of these continuing activities:
9705050238 970326 PDR ADOCK 05000336 S
PDR h
w
Volume Free Date Discharaed (aallons)
Available Chlorine Temperature (F) 2/19/97 7,592 seawater 0.03 ppm 58.6 2/20/97 10,256 seawater 0.02 ppm 63.0 2/21/97 4,452 seawater 0.02 ppm 58.0 2/22/97 2,324 seawater 0.03 ppm 56.0 2/24/97 644 seawater &
<0.02 ppm 69.0 deionized water *
- Wastewaters originating from hydrolazing of the "C" RBCCW heat exchanger.
During each of the above discharges, a minimum of at least two condenser circulating pumps were in operation and the maximum daily flow did not exceed 30,000 gallons per day.
Should you have any questions, please call Mr. Paul Jacobson, Environmental Services
- Nuclear, at (860) 447-1791 Ext. 2335.
Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY cC t_
S.E.'Scace Director - Nuclear Engineering Programs cc: