ML20214M484
| ML20214M484 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 05/22/1987 |
| From: | Adensam E Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20214M413 | List: |
| References | |
| NUDOCS 8706010320 | |
| Download: ML20214M484 (5) | |
Text
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NUCLEAR REGULATORY COMMISSION
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WASHINGTON, D. C. 20555 7590-01 UNITED STATES NUCLEAR REGULATORY COMMISSION
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CAROLINA POWER & LIGHT COMPANY DOCKET NOS. 50-325 and 50-324 ENVIR'ONMENTAL ASSESSMENT AND FINDING OF NO SIGNIFICANT IMPACT The U. S. Nuclear Regulatory Comission (the Comission) is considering issuance of amendments to Facility Operating Licenses Nos. DPR-71 and DPR-62 issued to the Carolina Power & Light Company, (the licensee), for operation of Brun'swick Steam Electric Plant, Units 1 and 2, located in Brunswick County, North Carolina.
ENVIRONMENTAL ASSESSMENT Identification of Proposed Action:
The proposed action would permit the licensee to implement changes to the Brunswick facility and to Technical Specifications (TSs), as described in their letter of November 7, 1986. The following assessment applies to Units I and 2.
The Need for the Proposed Action:
The B division battery bus for each of the Brunswick units is configured
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in such a way that it is the normal feed for a unit's lighting inverter and standby Uninterruptible Power Supply (UPS). In addition, the B division bus serves as the alternate feed for the opposite unit's lighting inverter. Each of the lighting inverters and the power conversion module for the UPS is currently rated at 37.5 kVA. Currently, TS Surveillance Requirement 4.8.2.3.1(b) requires verification at least once per seven days that there are no more than two of these 37.5 kVA power conversion modules aligned to theBdivisionbustopreventoverloadingthebus,whichitisoIeedssafety-related loads during a postulated design basis accident.
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2-The UPS system is a non-1E system that feeds various loads throughout the Brunswick facility. The licensee states that the existing UPS system is approaching obsolescence and is considered to be beyond reasonable maintain-ability. The licensee proposes to replace the UPS system with currently available equipment that is rated at 50 kVA. To permit this upgrade, the licensee proposes to delete the reference to 37.5 kVA equipment from Surveil-lance Requirement 4.8.2.3.1 (b). The proposed TS change would require verifi-cati,on that no more than two power conversion modules, consisting of either two lighting inverters or one lighting inverter and one plant UPS unit, are aligned to the B division bus. As currently exists, the load from two lighting inverters would be greater than from one lighting inverter and the proposed 50 kVA UPS module.
Environnmental Impacts of the Proposed Action:
Because the maximum load from the inverters and UPS module would not a
change, there would be no effect from this change on systems required to mitigate the effects of a postulated accident. Thus, post-accident radio-logical releases will not be greater than previously determined, nor do the proposed changes otherwise affect radiological plant effluents. Occupational exposures to radiation would also be unaffected. Therefore, the Comission concludes that there are no significant radiological environmental impacts associated with the proposed changes.
With regard to potential non-radiological impects, the proposed changes involve systems located within the restricted area, as defined in 10 CFR,
Part 20. No non-radiological effluents are affected, and no other environ-mental impact would occur. Therefore, the Comission concludes that there are no significant non-radiological environmental impacts associated with the proposed changes.
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> Alternatives to the Proposed Action:
Since the Commission has concluded that there is no measureable environ-mental impact associated with the proposed changes to the TSs, any alternative to the amendments will either have no environmental impact or greater environ-l mental impact. The principal alternative would be to deny the requested amendments. This would not reduce environmental impacts of plant operation.
Alternative Use of Resources:
This action does not involve the use of resources not previously considered in the Final Environmental Statement for Brunswick Steam Electric Plant, Units 1 and 2, dated January 1974.
Acencies and Persons Consulted:
The Commission's staff reviewed the licensee's request and did not consult other agencies or persons.
FINDING OF NO SIGNIFICANT IMPACT The Commission has determined not to prepare an environmental impact statement for the proposed license amendments.
Based on the foregoing environmental assessment, the Commission concludes that the proposed action will not have significant effect on the quality of the human environment.
For further information with respect to this action, see the application for the amendments dated November 7,1986, which is available for public inspection at the Commission's Public Document Room,1717 H Street, N.W.,
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. Washington, D.C. 20555 and at the University of North Carolina at Wilmington, William Madison Randall Library, 601 S. College Road, Wilmington, North Carolina 28403-3297.
Dated at Bethesda, Maryland this 22nd day of May 1987.
FOR THE NUCLEAR REGULATORY COMMISSION Elinor G. Adensam, Director Project Directorate 11-1 Division of Reactor Projects - I/II 4
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