ML20058M972
| ML20058M972 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 09/30/1993 |
| From: | Berkow H Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20058M976 | List: |
| References | |
| NUDOCS 9310070209 | |
| Download: ML20058M972 (2) | |
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7590-01 UNITED STATES NUCLEAR REGULATORY COMMISSION VIRGINIA ELECTRIC AND POWER COMPANY DOCKET NOS. 50-338 AND 50-339 ENVIRONMENTAL ASSESSMENT AND FINDING OF NO SIGNIFICANT IMPACT The U.S. Nuclear Regulatory Commission is considering issuance of an exemption from the requirements of 10 CFR Part 50, Appendix A, General Design Criterion-2 (GDC-2) to Virginia Electric and Power Company (the licensee), for the North Anna Power Station, Units No. I and No. 2 (NA-l&2) located in Lo'disa County, Virginia.
ENVIRONMENTAL ASSESSMENT Identification of Proposed Action The proposed exemption would allow temporary relief from the requirements of GDC-2 for NA-l&2 during the Phase 1, Stage 4 service water (SW) system restoration program. The scope of Stage 4 activities involves restoration of the two 24-inch auxiliary SW supply lines from Lake Anna to the main SW headers.
The exemption would permit the temporary removal of the earth which provides missile protection for the auxiliary SW system piping in the yard area north of the turbine building.
Implementation of the Stage 4 effort will require a temporary exemption from GDC-2 for a period of time beginning January 3, 1994, and ending October 14,1994 (i.e., prior to the start of the next scheduled NA-1 refueling outage).
The Need for the Proposed Action:
The proposed exemption is needed in order to permit the completion of highly desirable upgrades on the auxiliary SW system without the need for unplanned unit outages or unduly extending the next several scheduled 9310070209 930930 PDR ADOCK 05000338 P
PDR.i
. refueling outages. The Phase 1, Stage 4 effort would be performed during dual unit operating conditions and would not require unit outages.
Environmental Imoacts of the Prooosed Action:
The proposed exemption does not involve any measurable environmental impacts during normal operation since the plant configuration is changed only minimally and plant operation is not changed. The likelihood of tornado-generated or other high wind-generated missile damage during the time the exemption would be in effect which would affect equipment required to operate to avoid radiological impact is low. Thus, the proposed exemption would not significantly affect the probability or consequences of potential reactor accidents and would not otherwise affect radiological plant effluents.
Consequently, the Commission concludes that there are no significant radiological impacts associated with the proposed exemption.
With regard to potential non-radiological impacts, the proposed exemption involves features located entirely within the owner-controlled area defined in 10 CFR Part 20. The Stage 4 refurbishment activities do not affect non-radiological plant effluents and there is no other environmental impact.
Therefore, the staff concludes that there are no significant non-radiological environmental impacts associated with the proposed exemption.
Alternatives to the ProDosed Action:
The principal alternative to requesting the temporary exemption for implementation of the Phase 1 Stage 4 SW restoration project would be to comply with the restrictive requirements of GDC-2. However, this alternative would not significantly enhance the protection of the environment, and would result in a significant loss of power generation since a dual unit outage would be required.
l 1 Alternative Use of Resources:
This action does not involve the use of any. resources not previously considered in the April 1973 Final Environmental Statement for the North Anna Power Station, j
Aaencies and Persons Consulted:
The NRC staff consulted with the State of Virginia regarding the environmental impact of the proposed action.
FINDING OF NO SIGNIFICANT IMPACT Based upon the foregoing environmental assessment, the staff concludes i
that the proposed action would not have a significant effect on the quality of the human environment and has determined, therefore, not to prepare an environmental impact statement for the proposed exemption.
For further details with respect to this action, see the-application j
dated July 30, 1993, which is available for public inspection at the Commission's Public Document Room, The Gelman Building, 2120 L Street, NW.,
i Washington, DC 20555, and at the local public document room located at the Alderman Library, Special Collections Department, University of Virginia, j
Charlottesville, Virginia 22903-2498.
Dated at Rockville, Maryland, this 30th day of September 1993 FOR THE NUCLEAR REGULATORY CO M ISSION i
l' He ert N. Berkow, Director Project Directorate II-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation R
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