ML18037A355
| ML18037A355 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 07/24/1981 |
| From: | Ippolito T Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML18037A356 | List: |
| References | |
| NUDOCS 8108030033 | |
| Download: ML18037A355 (12) | |
Text
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l4 IO Cy V/+n UNITEDSTATES NUCLEAR REGULATORY COMIVlISSION.
WASHlNGTON, D. C. 20555 NIAGARA MOHAWK POWER CORPORATION DOCKET NO. 50-220 NINE MILE POINT NUCLEAR STATION UNIT.NO.
1 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No.
46'icense No. DPR-63 1
1.
The Nuclear Regulatory Commission (the Commission) has.found that:
IIne The application for amendment by, Niagara Mohawk Power Corporation (the licensee) dated
~uly 16~:1980 complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (th Ac+) and the Commission's regulations set forth in 10 CFR Chapter I; S
B.
The facility will operate in conformity with the application-,
the provisions of the Act, and the rules and regulations of the Commission; C.
There is reasonable assurance
( i) that the activities authorized by this 'amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations; D.
The issuance of this amendment will riot be inimical to the ccmmon defense and security or to the health and safety of the public; and E.
The issuance of this amendment is in accordarIce with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.
2.
Accordingly, the license is amended by changes to the Technical Spec-ifications as indicated in the attachment to this license amendment and paragraph Z.C.(2) of Facility License No. DPR-63 is hereby amended to read as follows:
(2)
Technical S ecifications The Technical Specifications contained in Appendices A and B,, as. revised through Amendment No. 46're hereby incorporated in the license.
The licensee shall operate the facility in accordance with the Technical Specifications.
3.
This license amendment is effective as of the date o$ its issuance.
FOR THE NUCLEAR REGULATORY COMMISSION
Attachment:
Changes to the Technical Specifications Date of Issuance:
July 24, 1981 Thomas.A. Ippolito, Chief Operating Reactors Branch 82 Division of Licensing
ATTACHMENT TO LICENSE AMENDMENT NO. 46 fACILITY OPERATING LICENSE NO.
DPR-63 DOCKET NO. 50-220 Replace the following pages of the Appendix "S" Technical Specifications with the enclosed pages as indicated.
The revised pages are identified by Amendment number and contain vertical lines indicating the area of change.
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2.0 LIMITING CONOITIONS FOR OPERATION
- 2. 1 Therma 1 2.1.1 Maximum aT OBJECTIVE The purpose of this Specification is to limit the thermal stress to the aquatic ecosystem by limiting the maximum aT across the main condenser inlet and the screenwell discharge bay.
SPEC IFICATION Maximum 4T across the main condenser inlet and the screenwell discharge bay during normal Station operation shall be limited to 35oF.
If during, normal Station operation the aT exceeds 35oF for eight consecutive hour s, the cause of this deviation shall be investigated and positive action shall be taken to prevent any such deviation in the.
future.
In addition, a report shall be submitted in accordance with Section 5.5.2.
MONITORING REQBJ IREMENT The AT across the main condenser inlet and the screenwell discharge bay shall be monitored and recorded once per hour.
Two resistance temperature detectors (RTD) shall measure the temperature in each location.
The RTO's shall be accurate to +I.OoF.
BASES Lake studies and operating experience indicate that mortality of
- plankton, eggs, and larvae entrained in the condenser will not have a
significant effect on the lake population of the species involved.2B3 Mith the main condenser operating at design heat load and circulating water at 95% design flow, the condenser temperature rise should not exceed 36 F.
Since the service water discharges downstream of the condenser outlet, the corresponding station cooling water temperature rise across the plant should not exceed 35oF.
1.2 Maximum Di'scttarge Temperature 115P 1.3 Maximum BTU Per Hour NOT APPLICABLE
2.1.5 Heat Treatment of Circulating Mater System OBJECTIVE To limit the thermal stress to the aquatic ecosystem by limiting the circulating water temperature increase over lake ambient temperature resulting from tempering and reverse flow procedures.
SPEC IFICATION When the lake inlet temper ature is between 32oF and 50oF, the discharge temperature shall not exceed the lake inlet temperature by more than 50oF, except during reverse flow operations.
At no time during tempering, except during reverse flow operations, shall the discharge temperature exceed 85oF.,
Following a flow reversal, the discharge temperature shall not exceed the lake inlet temperature by more than the following values:
70oF for the first hour following flow reversal 60oF for the second hour following flow reversal 50oF two hours following flow reversal and thereafter NOHITOR ING REOUIRENEHT The discharge temperature shall be monitored and recorded hourly as provided in the Monitoring Requirement of Section
- 2. l. l.
BASES When lake temperature is less than 50oF, part of the discharge flow in the screenwell may be recirculated to the intake to maintain condenser inlet temperature between 40oF and 50oF.
This proc dure is known as "tempering".
The maximum circulating water temperature rise due to tempering is 18oF and occurs when the lake temperature is 32oF.
When this is added to the 35oF hT, the maximum rise is 53oF over lake inlet temperature.
Maintaining the condenser inlet temperature at no more than 50oF during tempering ensures that the discharge temperature will not. exceed 85oF during tempering.
The amount of tempering is controlled by moving a gate in the screenwell, and is normally adjusted to maintain the optimal condenser inlet temperature of approximately 45oF.
The gate can be adjusted to achieve this temperature within an error of approximately 5oF.
This error includes minor tempering gate leakages which may be present at any time including when lake temperature is in excess of 50oF.
This leakage is not considered tempering for the purpose of this specification.
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