ML20154A131

Amend 106 to License DPR-36,modifying Tech Spec 3.12 Re Station Svc Power by Prohibiting Reliance on 115 Kv Suroweic Line Unless Addl Justification Provided to NRC

ML20154A131
Person / Time
Site:	Maine Yankee
Issue date:	09/07/1988
From:	Wessman R Office of Nuclear Reactor Regulation
To:
Shared Package
ML20154A126	List: ML20154A121 ML20154A131 ML20154A141
References
NUDOCS 8809120082
Download: ML20154A131 (5)

Text

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MAINE YANKEE ATOMIC POWER COMPANY DOCKET NO. 50-309 MAINE YANKEE ATOMIC POWER STATION AMEN 0 MENT TO FACILITY OPERATING LICENSE Amendment No. 106 License No. OPR-36

1. The Nuclear Regulatory Comission (the Comission) has found that:

A. The application for amendment by Maine Yankee Atomic Power Company (the licensee), dated June 29, 1988 complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act), and the Comission's rules and regulations set forth in 10 CFR Chapter I; B. The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Comission; 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 Comission's regulations; D. The issuance of this amendment will not be inimical to the comon defense and security or to the health and safety of the public; and E. The issuance of this amendment is in accordance with 10 CFR Part 51 of the Comission's regulations and all applicable requirements have been satisfied, s809120082 000907 9 DR ADOCK 0500

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2. Accordingly, the license is amended by changes to the Technical Specifications as indicated in the attachment to this license amendment, and paragraph 2.B(6)(b) of Facility Operating License No. DPR-36 'is hereby amended to read as follows: ,

(b) Technical Specifications The Technical Specifications contained in Appendix A, as revised through Amendment No.106 , are 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 of its issuance.

FOR THE NUCLEAR REGULATORY COMMISSION TS.ARichard H. Wessman, Director Project Directorate I-3 Division of Reactor Projects I/Il

Attachment:

Changes to the Technical Specifications Date of Issuance: September 7, 1988 i

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i ATTACHMENT TO LICENSE AMENDMENT NO.106 FACILITY OPERATING LICENSE NO. DPR-36 DOCKET NO. 50-309 Revise Appendix A as follows: I Remove Pages Insert Pages 3.12-1 3.12-1 3.12-2 3.12-2 1

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3.12 STATION SERVICE POHER Aeolicability Applies to station service electrical power systems.

Obiectives ,

4 To assure an adequate supply of electrical power during station operation.

Soecification:

A. The following equipment must be operable whenever the reactor coolant system temperature and pressure exceed? 210*F and 400 psig.

1. One 115 kV incoming line in service.*

2. Olesel generator DG-1A operable; 4160v emergency bus 2, 480 y emergency bus 7, and d-c distribution cabinet 3 in service.

3. 10,000 gallons of diesel fuel oil in tne fuel oil tanks.

Remedial Action: Restore requires limiting condition within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

B. The following equipment must be operable whenever the reactor is critical.

1. One 115 kV incoming line in service.*

2. Diesel generator DG-1A operable; 4160v emergency bus 5, 480v emergency bus 7 and d-c distribution cabinet I in service.

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3. Diesel generator DG-18 operable; 4160v emergency bus 6, 480v emergency bus 8, and d-c distribution cabinet 3 in service.

4. 19,600 gallons of diesel fuel oil in the fuel oil tanks.

Remedial Actions:

1. If the 115 kV incoming line becomes unavailable, the NRC shall be notified within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the plans for restoration of service and the line must be restored to the available status within seven days. '

2. If either diesel generator or its associated emergency buses or d-c distribution cabinet becomes unavailable, the operable diesel generator is to be tested once a day and the equipment t restored to the available status within seven days.

3. If more than one of the power supplies in B above is not operable, follow Specification 3.0.A. *

• Until the capacitor bank is initially operable, the 115 kV Surowiec Line (Section 69) may not be relied on to meet this condition unless additional justification is provided to the NRC.

Amendment flo. 1), 65, 106 3.12-1

C. Under accident conditions the automatically connected load to either diesel generator shall not exceed the 2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> rating of 2850 kW.

Enti:

Availability of power to the engineered safeguards equipment is necessary when the reactor is at power. If the loss of both incomin lines, a diesel generator or its associated emergency buses occurs, ga period of seven days operation is permitted while the situation is being assessed and full redundancy is being restored. This time period is justified because adequate sources of power remain available for the operation of the engineered safeguards equipment.

The fuel requirement of 19,600 gallons is made up as follows:

A. 17,827 gallons is the amount that will be required for the maximum expected engineered safeguards load for a period of seven days; B. 10 percent of the above as a contingency for any non-engineered safeguard requirement during this period.

Specification A assures that an emergency power source is available whenever the reactor coolant system is above the specified pressure and temperature limit. It recognizes the decreased consequences of a loss of coolant accident if the reactor is suberitical.

Restrictions are placed on the use of the 115 kV Surowiec transmission line (Section 69) to satisfy Technical Specification 3.12.A.1 and 3.12.8.1 because this line may not be capable of maintaining proper voltage while supplying worst case loading. A capacitor bank is being installed to improve voltage on the 115 kV line. Untti the capacitor bank in installed and placed in operation, the Surowiec Line may not be relied on to meet the condition of having one 115 kV incoming line in service without providing additional justification to the NRC. The additional justification could be related to the duration of time involved, reduced plant loads, reduced 115 kV line loads, or other considerations.

3.12-2 Amendment No. H.106 .

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