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1998 Discharge Monitoring Rept for Pilgrim Nuclear Power Station
	ML20217A858
Person / Time
Site:	Pilgrim
Issue date:	02/28/1998
From:	Desmond N; BOSTON EDISON CO.
To:	; MASSACHUSETTS, COMMONWEALTH OF
References
	BECO-5.98.025, NUDOCS 9803250277
	Download: ML20217A858 (10)
	v • d • e

.

B00 tort W Pilgrim Nuclear Power Station Rocky Hill Road Plymouth, Massachusetts 02360-5599 March 18,1998 Nancy L Desmond BECo Ltr. 5.98.025 Regulatory Relations Group Manager Planning and Administration (SPA)

U.S. Environmental Protection Agency P.O. Box 8127 Boston, MA 02114-8127 Massachusetts Dept. of Environmental Protection 20 Riverside Drive Lakeville, MA 02347 Discharae Monitorina Report

Dear Sirs:

Enclosed is the Discharge Monitoring Report for Pilgrim Nuclear Power Station (PNPS),

NPDES permit number MA0003557 (Federal) and number 359 (State).

The period covered by this report is February 1998.

Should you have any questions on this report, please direct them to our Principal Marine Biologist, Mr. Robert Anderson, at (508) 830-7935.

Respectful %

d Nancy L. Desmond

& MD RDA/lb/radmisc/DMR-JAN Attachments: 1. Summary

2. Discharge Monitoring Report cc:

U. S. Nuclear Regulatory Commission Mass. Dept. of Environmental Protection Document Control Desk Office of Watershed Management Washington, DC 20555 627 Main Street Worcester, MA 01608 U. S. Nuclear Regulatory Commission

/

Region 1 475 Allendale Road.

/

King of Prussia, PA 19406 Senior NRC Resident inspector d1 Pilgrim Nuclear Power Station 9'803250277 980228

~

PDR ADOCK 05000293:

R PDR

a ATTACHMENT 1 TO BECo LETTER 5.98.025

SUMMARY

PILGRIM i DISCHARGE MONITORING REPORT In accordance with the' Federal Clean Water Act, as amended (33USC 1251 et seg: the

" CWA"), and the Massachusetts Clean Water Act, as amended (M.G.L.; Chap. 21, 26-53),

regarding effluerst limitations, monitoring requirements and other conditions set forth in the

- Pilgrim NPDES permit (Federal Permit Number MA0003557, and State Permit Number 359),

Paits I and ll, the following information is submitted for the period February 1998.

l.

Discharoe Points Covered in this Report Discharoe Point Discharoe Identification 001 Condenser Cooling Water 002 Thermal Backwash for Biofouling Control 003 Intake Screen Wash

.004,005,006, and 007 Yard Drains (April and September) 008 Sea Foam Suppression t

010 Service Cooling Water 011-Makeup Water and Domineralizer Waste Discharge 11.

Summary and Notes of Discharoe Report A.

The flows at points 001 and 010 are calculated from system pump capacity and are equal to the total for all pumps in each system running at full capacity for a 24-hour period. The flow at 011 is measured by noting sump levels before and after discharge.

Flow at point 002 is a conservative figure obtained by

. calculating flow if backwashing took place for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Flows at points 003 and 008 are calculated from system pump capacity and mean operating time.

B.

The temperatures at points 001 and 002 are measured by resistance temperature detectors (RTD's).

C.

Periodically, total residual chlorine (TRC) concentration in the service cooling water (010) exceeds permit requirements (0.50 ppm daily average TRC and 1.00 ppm daily maximum TRC) prior to mixing with any other stream, primarily because of the number of service water pumps in operation. Chlorine injection levels are lowered as a corrective measure. The dilution provided by the PNPS circulating water flow keeps total residual chlorine concentrations discharged to Cape Cod Bay below the NPDES permit limit of 0.1 ppm.

y

. D.~

For stormwater outfalls 004, 005, 006 and 007, samples are collected by grab sampling. - Samples are handled and stored in accordance with 40 CFR 136.

~

No. additional inputs to these stormwater_ outfalls occur downstream of the sampling locations.

nj p;

Lj o

i j

L s

=

,....L C

. E.

, Intake traveling water screens were operated with dechlorination pumps on in February.

F.

No sawdust was applied to seek and seal PNPS condenser leaks in February 1998.

G.

The following boron and sodium nitrite discharges (ppm) occurrred in February 1998 from discharge point #001. All discharges were below NPDES permit limits prior to entering Cape Cod Bay.

Date Gallons Concentration Concentration Discharoed Discharoed Before Discharae' Discharaed Boron 1/27/98 3,173 1.8 0.0023 Sodium Nitrite 1/27/98 3,173 37.5 0.0484 i

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i!

!hpy

e ATTACHMENT 2 to BECo LETTER 5.98.025 DISCHARGE MONITORING REPORT l

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