ML20112A208
| ML20112A208 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 12/27/1984 |
| From: | Harrington W BOSTON EDISON CO. |
| To: | MASSACHUSETTS, COMMONWEALTH OF |
| References | |
| NUDOCS 8501090645 | |
| Download: ML20112A208 (10) | |
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~n COOTON E21820N COMPANY a 800 BovLaTON STREET BOSTON, M ASSACHUBETTs 02199 WIL6 TAM D. HARRINGTON December 27, 1984 o.m.
BEco Ltr. #84-5.84.053 Director Mass. Division of Water Pollution Control Permits Section - 7th Floor 1 Winter Street Boston, Massachusetts 02108 Gentlemen: In accordance with NPDES Permit MA0003557 (Pilgrim I) for Pilgrim Station, the attached 1985 Environmental Monitoring, Thermal Discharge Fish Surveillance, and Dissolved Nitrogen Saturation Reduction programs and plans are submitted by Boston Edison Company for your approval. This submittal is specifically in response to Part I, Paragraph 7d of the above referenced permit, which provides a deadline of December 31st of each year of the permit's duration to submit revised programs and plans. These programs and plans will continue to be reviewed annually with the Pilgrim Administrative-Technical Committee, and any recommended revisions will be submitted to the regulators designated in the permit for approval. If there are any questions concerning the attached programs and plans, please do not hesitate to call either Hr. Lewis Scotton (424-2751) or Mr. Robert Anderson (424-2756) of Boston Edison Company. Very truly yours, 1 g RDA/dyb
Attachment:
1985 Environmental Monitoring, Thermal Discharge Fish Surveillance and Dissolved Nitrogen Saturation Reduction Program and Plan
.cc: Mr. Domenic 8. Vassallo, Chief V Operations Reactors Branch #2 Division of Licensing n c3 Office of Nuclear Reactor Regulation c(()"4 I
U.S. Nuclear Regulatory Commission Washington, D.C. 20555 cc: Dr. Thomas E. Murley Regional Administrator Office of Inspection & Enforcement
' Region I 631. Park Avenue King of Prussia, PA 19406 g I
~
8501090645 B41227 PDR ADOCK 05000293 R PDR X
MARINE ECOLOGY STUDIES o RELATED TO OPERATION OF PILGRIM STATION UNIT 1 (NPDES PERMIT PROGRAMS) In accordance with NP. DES Permit requirements fcr Pilgrim Station (Permit No. MA0003S57) the following modified programs which commenced in January 1978, are presented for 1985. The 1978 through 1984 programs were submitted to the Regional Administrator, U.S. Environmental Protection Agency and Director, Mass. Division of Water Pollution Control, in December 1977 through December 1983, respectively. I. ENVIRONMENTAL MONITORING The Environmental Monitoring Program represents a continuation of previous studies. Pre-operational studies for Pilgrim Unit I commenced in 1969, almost four years before initial operation in December 1972. In accordance with environmental monitoring and reporting requirements of the Unit i Operating License, DPR-35, issued by the U.S. Atomic Energy Commission (now the Nuclear Regulatory Commission) Boston Edison had carried out a post-operational Marine Ecology Program. This program was designed to investigate the Cape Cod Bay ecosystem, with emphasis on the Rocky Point area, in order to determine whether the operation of Pilgrim Station resulted in measurable effects on the marine ecology and evaluate the significance of any such effects. The Marine Ecology Program for Unit I continuad for five years from initial full power operation - that is, through December 1977 and is now replaced by this NPDES Permit Program (with NRC concurrence). The post-operational studies for Pilgrim Unit I and the collected data arc incorporated and analyzed in the Marine Ecology Semi-Annual Reports (#1-24), Marine Ecology Final Report (1978), and the 316 Demonstration Document (1975) and Supplement (1977). The NPDES Program includes the following elements: A. Pilgrim Administrative - Technical Committee The Pilgrim Administrative - Technical Committee (PATC) is an advisory ~ committee that was established to ensure that the Pilgrim marine studies have the benefit of qualified scientific and technical advice and are responsive to regulatory agency concerns. The PATC recommends improvement to ongoing studies based on the latest results with the approval of the U.S. EPA and Mass. Div. of Water Pollution Control. It has held 62 meetings since July 16, 1969, and will continue to be involved in the Pilgrim future marine studies. The PATC is composed of representatives (technical and administrative) from each interested federal and state regulatory agency, Boston Edison Company and from the University of Massachusetts. The present membership is as follows: Agency National Marine Fisheries Service - (2 members) Mass. Division of Water Pollution Control - (2 members) U.S. Environmental Protection Agency - (3 members) Mass. Division of Marine Fisheries - (2 members) I
. U. S. Fish and Wildlife Service - (1 member)
University of Massachusetts - (2 members) Boston Edison Company - (2 members) Each meeting is chaired by a representative of the PATC. Minutes of PATC meetings appear in the semi-annual Pilgrim Station marine ecology reports. B. Marine Fisheries Studies (Mass. Division of Marine Fisheries) The Division of Marine Fisheries (DMF), an agency of the Commonwealth of Massachusetts, has conducted a number of fleid studies pertinent to Pilgrim Station. Those studies listed below will be continued. Fish The DMF has studied the occurrence and distribution of fish around Rocky Point and at sites around the area of discharge temperature increase. Groundfish will continue to be sampled using a 32-foot Shrimp trawl (1/2 inch mesh liner) bi-weekly. The new sampling station added in 1984 for the Shrimp trawl, in the PNPS intake embayment, will be continued. Figure 2 shows sampling station locations. A finfish observational dive survey (Figure 2) will continue in 19E" for the Pilgrim Station thermal plume area. This study will involve bi-weekly diving from March through October to document fish behavior and condition at selected stations. During mid-August to mid-September, weekly diving will be done to document potential thermal plume-related mortalities. In April-October 1985, a 150-foot beach seine (3/16 inch mesh bag) survey (Figure 1) will be performed weekly, including the Pilgrim Station intake embaymcnt.(a large seine will be used in the intake). This study will record fishes which are most susceptible to impingement mortalities that - have occurred in previous years. Lobster The DMF has collected lobster catch statistics bi-weekly through each fishing season (March to November) by sampling commercial lobstermen's pot hauls. This effort will continue as a measure of Pilgrim effect on the local lobster population (Figure 3). Gas Saturation In 1985, analyses will be conducted only during periods of potential
< discharge-related mortalities. A Weiss saturometer will be used in situ to measure total partial pressure of dissolved gases, and percent saturation of total gas, nitrogen, and oxygen will be determined.
L- _ _ _ _ _ . . _ _ _ _ -
C. Impingement Studies (Marine Research, Inc./8ECo) The main objective of the impingement study is to calculate impingement rates of marine organisms by gathering and analyzing data on numbers and species carried onto the four travelling screens at Pilgrim Stattor.. In 1985 the weekly collection time will be twenty-four hours (three 8-hour periods). Supplemental fish survival data will also be recorded. D. Benthic Studies (Battelle New England Marine Research Lab) The benthic flora and fauna are being monitored at three sampling stations at depths of approximately 10 feet DiLW) (Figure 1). The dominant flora and fauna in each plot are recorded, and quantitative samples are collected from rock surfaces. Sampling will continue two times a year to determine power plant related changes, if any. In addition, transect studies to map extent of stunted and denuded areas immediately off the discharge canal will be continued 4 times a year in 1985. E. Entrainaent Studies (Marine Research, Inc./8ECo) Entrainment monitoring studies in 1984 emphasized consideration of - ichthyoplankton, as will those in 1985. The 1985 entrainment studies will consist of routine monitoring of the Pilgrim discharge. This monitoring will be on a weekly basis during the period March-September and twice monthly during the periods January-February and Octaber-December. Samples will be collected in triplicate. If unusually high egg or larvae concentrations are found in the discharge when compared with previous years, steps will be takea to implement special ichthyoplankton contingency sampling plan to assess the reason for the high concentrations. The first plan will consist of single tows in the discharge canal. If these numbers are still unusually high, the second plan will consist of single tows at each of 13 bay stations off the plant, and samples will be analyzed immediately (Figure 4). BECo will analyze data and prepare the report. F. Winter Flounder Larvae Studies (Marine Research, Inc.) This program was terminated in 1984 and final multi-year report will appear in Semi-Annual Report #25. G. Reporting of Environmental Monitoring A semi-annual and an annual report covering each of the above (Items A-F), will be submitted to the EPA and MDWPC on October 31, 1985, and April 30, 1986, covering the periods January-June and January-December, respectively. l l f
II. THERMAL DISCHARGE FISH SURVEILLANCE The Thermal Discharge Fish Surveillance Program for Pilgrim Station has the following primary parts: A. Overflights Periodic aerial overflights of Cape Cod Bay and the Pilgrim vicinity to alert Boston Edison to the presence of large schools of fish in the area. These overflights will be conducted weekly throughout the year and summarized in each annual report. B. Observations of the Discharge Canal Boston Edison personnel will make frequent visual observations of the Pilgrim discharge canal during periods of fish migration. C. Olve Surveys Dive inspections of the discharge canal and fish barrier net determine fish presence and condition, and barrier net performance. BECo will report dive survey findings in each annual report. Also, fish sampling and diver observation in the plume area will be conducted bi-weekly from March through October by Massachusetts Division of Marine Fisheries personnel as part of the Environmental Program. The dive survey and canal observation elements of the Surveillance Program will provide a continuing check on the adequacy of the barrier net preventing the passage of fish into the canal. Stated differently, these elements will monitor compliance with the barrier condition of the permit. If these elements indicate that.the barrier is not functioning adequately and the permit's 115% surface nitrogen limitation is triggered by the RA, the overflights, as well as the canal observations and dive surveys, will indicate when fish susceptible to gas bubble disease mortality are sufficiently near Pilgrim Station to warrant action to reduce surface nitrogen saturation level to 115%. Boston Edison will notify the EPA Regional Administ.mtor and Massachusetts DWPC Director of the presence of a large school-of fish within 1/2 mile of the discharge canal concurrent with water quality conditions potentially harmful to the fish. III. DISSOLVED NITROGEN SATURATION REDilCTION The plan for reducing dissolved nitrogen surface' saturation levels to less than 1:5% in the discharge canal will involve a power reduction or outage, should a school of fish susceptible to gas bubble disease mortality be in the immediate vicinity of Pilgrim Station. The procedure for determining the need, feasibility and request for a power reduction or outage is as follows:
- 1. . Responsible regulatory / agency personnel familiar tiith fishery
. statistics (e.g., Mass. Divistor. of Marine Fisheries) estimate the magnitude of the fish school and, based on measured water quality and other pertinent environmental data, make an initial judgement as to the likelihood and effect of gas bubble disease mortality. They also determine the potential necessity for a nitrogen saturation reduction, and notify Boston Edison of this initial' judgement.
- 2. Boston Edison notifies Rhode Island, Eastern Massachusetts, and Vermont Energy Control (REMVEC) of the possibility of a power reduction and obtains projections through at least-the upcoming weekend. Boston Edison transmits this information and load information to the agencies / persons taking action identified in No. I above.
- 3. On the basis of this information, agency personnel formulate a specific recommendation to the EPA Regional Administrator and/or the M0HPC Director on the timing and duration of the power reduction that is, in their judgement, appropriate and in the-overall public interest.
- 4. Respons hle regulatory personnel request power reductions through a telephone call to the Boston Edison Pilgrim Nuclear Power Station Manager.
- 5. Boston Edison personnel record the r]sults of periodic surveillance of the condition and location of the fish prior to and subsequent to any plant changes.
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