ML18040A342
| ML18040A342 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 12/31/1997 |
| From: | Terry C NIAGARA MOHAWK POWER CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NMP2L-1778, NUDOCS 9805180347 | |
| Download: ML18040A342 (20) | |
Text
'CATEGORY 1 REGULATv Y INFORMATION DISTRIBUTIO SYSTEM (RIDS)
FACIL:50-410 Nine Mile Point Nuclear Station, Unit 2, Niagara Moha AUTH.NAME AUTHOR AFFILIATION TERRY,C.D.
Niagara Mohawk Power Corp; RECIP.NAME RECIPIENT AFFILIATION DOCKET 05000410 231 for Nine Mile 0501 ltr.
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A TITLE: Licensing Submittal: Environmental Rept Amdt E Related Correspondence, T
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NIAGARAMOHAWK C E N E RAT I 0 N BUSINESS CROUP CARL D. TERRY Vice President Nuclear Safety Assessment and Support NINE MILEPOINT NUCLEAR STATION/LAKEROAD, P.O. BOX 63, LYCOMING.NEW YORK 13093/TELEPHONE (315) 349-7263 FAX(315) 349-4753 May 1, 1998 NMP2L 1778 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 RE:
Nine Mile Point Unit 2 Docket No. 50-410
Subject:
Gentlemen:
Tnrnsmittal of1997 Annual Environmental Operating Report In accordance with Appendix B of the Operating License (Environmental Protection Plan) for Nine MilePoint Nuclear Station (NMPNS) Unit 2, enclosed is the f u p 'dJ M1,1997h ghD b
31,1997.
'1 In the event you have any questions concerning the report, please contact Kent E. Stoffie, Environmental Analyst at Nine MilePoint (315) 349-1364.
Very truly yours, Carl D. Terry Vice President Nuclear Safety Assessment &Support CD T/KES/kap Enclosure XC:
Mr. H. J. Miller, Regional Administrator, Region I Mr. B. S. Norris, Senior Resident Inspector Mr. D. S. Hood, Senior Project Manager, NRR WilliamHolzhauer, Esq.
Records Management 9805i80347 'V7i23i PDR
,ADOCK 050004i0 a
NIAGARAMOHAWKPOWER CORPORATION January 1, 1997 - December 31, 1997 for Mji'G'ILEPOINT NUCLEARSTATIONU&HT2 Facility Operating License NPF-69 Docket Number 50-410
Section 5.4.1 of the Environmental Protection Plan (EPP), as contained in Appendix B of the Operating License for the Nine MilePoint Nuclear Station Unit 2, requires that an Annual Environmental Operating Report be submitted to the Commission prior to May 1 of each year.
The following addresses the requirements found in Section 5.4.1 of the Environmental Protection Plan (EPP) for the submittal of the Annual Environmental Operating Report; Provide summaries and analyses of the results of the environmental protection activities required by Section 4.2 (ifany) of the EPP, including a comparison with related preoperational studies, operational controls (as appropriate), and previous non-radiological environmental monitoring reports; and an assessment of the observed impacts ofplant operation on the environment. Ifharmful effects or evidence of trends toward irreversible damage to the environment are observed, a detailed analysis of the data and a proposed course of mitigating action shall be provided.
Section 4.2 of the EPP denotes three areas of monitoring:
~
Section 4.2.1 (Aquatic Monitoring) has no specific monitoring requirements although it is noted that the Commission willrely on the decisions made by the State ofNew York under the authority of the Clean Water Act for any requirements.
Aquatic monitoring is specified in the station's State Pollutant Discharge Elimination System Permit (SPDES Permit) which is a site permit applicable to Nine MilePoint Nuclear Station Unit 1 and Unit 2. The SPDES Permit requires a limited Aquatic Monitoring Program (referred to in the permit as a Biological Monitoring Program) which, at the present time, is only applicable to Unit 1. Therefore, no Aquatic Monitoring Program is presently required for Unit 2.
Section 4.2.2 (Terrestrial Monitoring) and Section 4.2.3 (Noise Monitoring) of the EPP also do not contain any monitoring requirements.
2.
Provide a list of EPP noncompliances and corrective actions.
A review of the EPP requirements showed that there were no conditions of noncompliance with these requirements during 1997.
3.
Provide a list of all changes in station design or operation, or of any tests or experiments which involve a potentially significant unreviewed Environmental question (non-radiological).
A review ofplant records showed that there were three changes in station design/operation that involved a potentially significant unreviewed environmental question (non-radiological).
In all three instances, an environmental evaluation was performed and the changes did not create an unreviewed environmental question.
A brief description of the changes is included below:
Change to the lake water temperature limitfor tempering from 38'F to 45'F.
Lake temperature fluctuations are causing plant operations to enter and exit tempering actions in the cool water months (October - May). To remedy this, a change to increase the tempering temperature to 45'F was instituted. A review of the environmental impact of raising the lake temperature limitfor tempering from 38'F to 45'F was performed by Environmental Protection (EP).
The change to the lake water temperature limitfor tempering willnot affect compliance with the State Pollutant Discharge Elimination System (SPDES) permit.
Service water flow, delta temperature, discharge temperature, and copper limits are not significantly affected by tempering at lake water temperatures up to 45'F. It was concluded that there was no significant impact to the environment by increasing the lake water temperature limitfor tempering.
In addition, the New York State Department of Conservation (NYSDEC) expressed an interest in both Unit 1 and Unit 2 increasing tempering during the cool water months (October through May). The reason for the desire to increase the tempering was to reduce the amount of water withdrawn from lake Ontario thus reducing the potential to impinge or entrain small aquatic wildlife(e.g., minnows, plankton, etc.). A copy of the NYSDEC letter requesting NMPNS to evaluate the increase in tempering is attached.
Change lake water intake temperature from 77'F to 82'F.
It was determined that the Service Water System (SWP) calculation A10.1-N-130 used 77 F lake water inlet temperature, rather than the technical specification analytical limitof 82'F (design maximum) to determine the maximum SWP effluent temperature following a reactor scram.
A review of the calculation indicated that the maximum effluent temperature would be less than 110 F when SWP inlet temperature is 82 F instead of 77'F.
The SPDES Permit allows for a maximum SWP effluent temperature of 110'F. It was, therefore, concluded that there was no significant impact to the environment by increasing the lake water inlet temperature limitfrom 77 F to 82'F.
Evaluation of degraded fish return flow to the lake.
The Environmental Report and the Final Environmental Statement (FES) reference the fish diversion system as the major design component installed to minimize fish
t V
impingement at the Unit 2 lake water intake structure.
The FES references total fish diversion system flow at 13,400 to 14,900 gallons per minute (GPM). Following the recalibration of the fish diversion system flowmeter, current flow monitoring shows the system flow to be near 11,000 GPM.
Operations procedures direct operators to check the system ifthe flow rate falls below 11,000 GPM. Although this flow is below the system flow referenced in the FES, levels of fish impingement indicate that the fish diversion system is performing satisfactorily with the reduced flow. It was concluded that there was no significant impact to the environment by the reduced fish diversion flow.
4.
List all non-routine reports that were submitted during 1997 in accordance with Section 5.4.2 of the EPP.
During 1997, there were no non-routine reports were submitted to the Commission in accordance with Section 5.4,2 of the EPP,
I
S iL I~
New York State Department of Environmental Conservation 50 Wolf Road, Albany. New York 12233%756 Michael D. Zagata Commissioner January 16, 1996 Mr. Carey M. Merritt Supervisor of Environmental Protection Nine Mile Point Nuclear Station Ooerations Building Unit 2 P.O.
Box 63
- Lycoming, NY 13093
Dear Mr. Merritt:
This letter is to follow up on our January 11 1996 telephone conversation discussing the report entitled "Reduced Cooling Water Flow Evaluation for Nine Mile Point Nuclear Stations Unit-1 and Unit 2", submitted in December 1995 to fulfillSPDES permit additional requirement No. III. 6.
After reviewing the report and from our conversation, I agree that nuclear power plant design does indeed present some 'rather formidable challanges when looking at flow management options.
Although most of the items in the report were addressed satisfactorily, a couple of issues we discussed require some follow up.
Briefly:
1.
A discussion of the potential for use of variable speed pumps is needed, and should include information on both costs and benefits (water use reductions possible)
Indian Point Nuclear Station, for example, has achieved some rather substantial reductions in winte~ cooling water use with variable speed pumps.
The report stated that continuous tempering would reduce station efficiency and is beyond the design basis of the plant.
As other stations, such as J.A. FitzPatrick, utilize tempering quite regularly during the winter period (tempering up to 30 per cent of flow is possible),
more detail is needed on the past use of tempering at Nine Mile Point (e.g.
estimated tempering volumes),
and the constraints that have prevented further use of tempering, including the impact of various tempering flows and intake temperatures on plant thermal efficiency.
J
I look forw'ard to further discussing these matters with you-If you have any questions, please call me at 52.8-457-9439-Thank you.
Sincerely, M chael
. Calaban onservat 'on Biologist (Ecology) cc:
E. Radle I. Kedge, Region 7
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