ML20195J719
| ML20195J719 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 01/25/1988 |
| From: | Adensam E Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20195J723 | List: |
| References | |
| NUDOCS 8801280684 | |
| Download: ML20195J719 (5) | |
Text
4 7590-01 lJjilTEDSTATEDNUCLEARREGULATORYCOMMISSION CAROLINA POWER AND LIGHT COMPANY BRUNSWICK STEAM ELECTRIC PLANT, UNIT 2 DOCKET NO. 50-324
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ENVIRONMENTAL ASSESSMENT AND FINDING OF NO SIGNIFICANT IMPACT The U. S. Nuclear Regulatory Comission (the Comission) is considering issuance of an exemption from the requirements of 10 CFR Part 50.62(c)(4) to 1
Carolina Power & Light Company (the licensee), for Unit 2 of the Brunswick Steam Electric Plant loca~ted in Brunswick County, North Carolina.
ENVIRONMENTAL ASSESSMENT Identification of Proposed Action:
The exemption would grant relief from 10 CFR 50.62(c)(4) to allow the Brunswick plant to use an injection rate of 66 gallons per minute of 13 weight percent sodium pentaborate solution in the standby liquid control system I
(SLCS).
The licensee's exemption request and the bases therefor are contained in a letter dated August 17, 1987.
The Need for the Proposed Action:
The exemption is needed because the licensee proposes to depart from 10 CFR 50.62(c)(4) requirements, as a result of the Brunswick Steam Electric Plant having a reactor vessel diameter which is smaller than that used to establish the minimum flow and boron content requirements set forth in the regulation.
The Brunswick Plant uses an injection rate of 66 gallons per minute of 13 8801280684 880122 DR ADOCK 050 4
. weight percent sodium pentaborate solution because its vessel diameter is 218 inches, as opposed to 251 inches which is the basis for the 86 gallons per minute requirement.
Generic Letter 85-03, "Clarification of Equivalent Control Capacity for Standby Liquid Control Systems," dated January 28, 1985 states, in part:
The "equivalent in control capacity" wording was chosen to allow flexibility in implementation of the requirement.
The 86 gallons per minute and 13 weight percent sodium pentaborate concentration were values used in NEDE-24222, "Assessment of BWR Mitigation of ATWS, Volumes I and II," December 1979 for BWR/4, BWR/5, and BWR/6 plants with 251-inch diameter vessels.
NEDE-24222 recognized that different values would provide equivalent contro.1 capacity for smaller plants, and cited 66 gallons per minute in a 218-inch diameter vessel plant as equivalent to 86 gallons per minute in a 251-inch inside diameter vessel plant.
Environmental Impacts of the Proposed Action:
The exemption provides a degree for protection of the Brunswick reactor equivalent to that required by the regulation for reactors with larger reactor vessels for prompt injection of negative reactivity into a boiling water reactor pressure vessel in the event of an Anticipated Transient Without Scram (ATWS). This exemption will not affect containment integrity, nor the probabi-I lity of facility accidents. Thus, post-accident radiological releases will not be greater than previously determined, nor will the granting of the proposed exer:ption otherwise effect radiological plant effluents, or result in any signi-ficant occupational exposure.
Likewise, the exemption will not affect non-radio-logical environmental impacts associated with the proposed exemption.
l 1 4 Alternatives to the Proposed Action:
Because it has been concluded that there is no measurable environmental impact associated with the proposed exemptinn, any alternatives to the exemption will have either no envirormenta) impacts or greater environmental impacts.
The principal alternative to granting the exemption would be to deny the requested exemption. Such action would not reduce environmental impacts of the Brunswick Steam Electric Plant, Unit 2, operations and would not enhance the protection of the environment.
Alternative Use of Resources:
This does not involve the use of resources not previously considered in connection with the Final Environmental Statement for Brunswick Steam Electric Plant, Units 1 and 2, dated January 1974.
Agencies and Persons Consulted:
The NRC staff reviewed the licensee's request and did not consult other agencies or persons.
FINDING 0F NO SIGNIFICANT IMPACT The Commission has determined not to prepare an environmental impact statement for the proposed exemption.
Based on the foregoing environmental assessment, the staff concludes that the proposed action will not have a significant effect on the quality of human environment.
For further information with respect to this action, see the application for exemption dated August 17, 1987, which is available for public inspection at the Commission's Public Document Room,1717 H Street, NW, Washington, D.C.
t JAN 2 21988 4
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 25th day of January 1988.
FOR THE NUCLEAR REGULATORY COMMISSION Original Signed By Elinor G. Adensam Elinor G. Adensam, Director Project Directorate 11-1 Division of Reactor Projects I/II
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' Mr. E. E. Utley Brunswick Steam Electric Plant Carolina Power & Light Company Units 1 and 2 cc:
Mr. P. W. Howe Mr. C. R. Dietz Vice President Plant General Manager Brunswick Nuclear Project Brunswick Nuclear Project Box 10429 Box 10429 Southport, North Carolina 28461 Southport, North Carolina 28461 Mr. R. E. Jones, General Counsel Mr. H. A. Cole Carolina Power & Light mpany Special Deputy Attorney General P. O. Box 1551 State of North Carolina Raleigh, North Carolina 27602 Post Office Box 629 Raleigh, North Carolina 27602 Mr. Mark S. Calvert Associate General Counsel Mr. Robert P.-Gruber Carolina Power & Light Company Executive Director Post Office Box 1551 Public Staff - NCUC Raleigh, North Carolina 27602 Post Office Box 29520 Raleigh, North Carolina 27626-05E0 Mr. Christopher Chappell, Chairman Board of Comissioners Post Office Box 249 Bolivia, North Carolina 28422 Mrs. Chrys Baggett State Clearinghouse Budget and Management 116 West Jones Street Raleigh, North Carolina 27603 Resident Inspector U. S. Nuclear Regulatory Commission Star Route 1 Post Office Box 208 Southport, North Carolina, 28461 Regional Administrator, Region II U. S. Nuclear Regulatory Commission 101 Marietta Street, Suite 2900 Atlanta, Georgia 30303 Mr. Dayne H. Brown, Chief Radiation Protection Branch Division of Facility Services N. C. Department of Human Resources 701 Barbour Drive Raleigh, North Carolina 27603-2008