ML20101F112

Discharge Monitoring Rept for Pilgrim Nuclear Power Station for May 1992

ML20101F112
Person / Time
Site:	Pilgrim
Issue date:	05/31/1992
From:	Kraft E, Wagner E BOSTON EDISON CO.
To:	ENVIRONMENTAL PROTECTION AGENCY, MASSACHUSETTS, COMMONWEALTH OF
References
BECO-5-92-077, BECO-5-92-77, NUDOCS 9206240281
Download: ML20101F112 (10)

Text

{{#Wiki_filter:C s' e 80STON EDl!ON 25 Braintreet thil OffK 6 Idtk ] Braintree, Massachusetts 02184 l i h'P,s7e"nY c Nuuter Engineenng ) June 18, 1992 i BEco 5.92- 077 NPDES Program C,.erations Section (WCP) Environmental Protection Agency P. O. Box 8127 Boston, MA 0114 Massachusetts Division of Water Pollution Control l Lakeville Hospital Lakeville, MA 02346 l l DISCHARGE MONITORING REPORT

Dear Sirs:

Enclosed is the Discharge Monitoring Report for Pilgrim Nuclear Power Statior, (PNPS), NPDES Permit Number MA0003557 (federal) and Number 359 (State). The period covered by this report is May 1992. ( s C ~ RDA/ cab /6438 Attachments:

1. cummary l

2. Discharge Monitoring Report l

cc: U. S. Nuclear Regulatory Commission l Document Control Desk Washington, DC 20555 U. S. Nuclear Regulatory Commission I Region 1 475 Allendale Road King of Prussia, PA 49406 Senior NRC Resident inspector Pilgrim Nuclear Power Station L 9206240281 920531 l PDR ADOCK 05000293 R PDR l

ATTACHMENT 1 TO BECO LETTER 5.92 077

SUMMARY

PILGRlM 1 DISCHARGE MONITORING REPORT in accordance with the federal Clean Water Act, at amended (33USC 125191 seg: the " CWA"), and the Massachusetts Clean Water Act, as amend 9d (M.G.L.; Chap. 21,26-53), regarding effluent limitations, monitoring requirements and other conditions set forth in the Pilgrim NPDES Permit (federal Permit Number MA0003557, and State Permit Number 359), parts I and 11, the following information is submitted for the period May 1992. 1. Qischarae Points Covered in this Report Discharae Point Discharae 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) 010 Service Cooling Water 011 Makeup Water and Demineralizer Waste Discharge 11. Summary and Notes of Discharae Report A. The flow 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 point 011 is measured by noting sump levels before and after dischbrge, flow at point 002 is a conservative figure obtained by calculating flow if backwashing took place for 24 hours. Flow at point 003 is calculated from system pump capacity and mean operating time. B. The temperatures at points 001 and 002 are measured by resistance -temperature detectors (RID'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.

D. For stormwater outfalls 004, 005, 006 at1 037, Sigma 800 St Portable Composite Samplers are utilized.

1. he samplers are equipped with a " liquid level activator" that commences the sampling when the liquid reaches a predetermined level.

This assures a sample is taken within the first hour of the start of a significant storm event." The intake and collection assemblies of the samplers conform to U.S. EPA requirements for collecting oil and grease sampics (BEco Letter 5.92.005). No additional inputs to these stormwater outfalls occur downstream of the composite samplers' sampling locations. E. Intake traveling water screens were operated with dechlorination pumps on at all times, f. Sawdust was applied to seek and seal PNPS condenser leaks on May 7 (360 pounds) and May 10 (60 pounds). G. The following boron and sodium nitrite discharges (ppm) occurred in May 1992 from discharge point #001. All discharges were below NPDES Permit limits prior to entering Cape Cod Bay. Date Gallons Concentration Concentration (lischanied Discharged D3. fore Discharm Discharged Baron 5/01/92 11,189 <0.05 <0.001 5/09/92 10,688 <0.05 <0.001 5/21/92 10,354 <0.05 <0.001 5/29/92 13,360 <0.05 <0.001 Sodium Nitrite 5/01/92 11,189 <20.0 <0.026 ~ 5/09/92 10,688 <20.0 <0.026 5/21/92 10,354 <20.0 <0.026 5/29/92 13,360 <20.0 <0.026 H. Because of insufficient rainfall flow in stormwater yard Drain #006 and blockage of the sampler in Drain #007 these samples were unable to be collected in April. There was also insufficient rainfall flow for sample collection during May in Drains #006 and #007. Analysis of these drains' samples will be reported in the next DMR for the month when they can be collected. I. Dilgrim Station Marine Ecology Semi-Annual Report No. 39 was sent to the USEPA (Region 1) and Mass. Division of Water Pollution Control (DWPC) on April 29, 1992, as required by the NPDES Permit

1. MA0003557 (BECo Letter 5.92.050).

b

J. Approximately 500 cubic yards of sand were removed f rom the concrete surfaces of the ir.take structure in liay, 1992. It was pumped into brea bater crevices above the high tide mark. The sand removal was nccessary to alleviate concern over its effects on normal operation of mechanical components / traveling screens, and it was expected to not have an adverse environmental impact. The removal operation was in accordance with Part 1. Paragraph A.l.o. of the NPDES Permit.

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