ML20236T489
| ML20236T489 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 07/22/1998 |
| From: | Kuo P NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20236T491 | List: |
| References | |
| NUDOCS 9807280216 | |
| Download: ML20236T489 (4) | |
Text
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7590-01-P l
UNITED STATES NUCLEAR REGULATORY COMMISSION VIRGINIA ELECTRIC AND POWER COMPANY.
NORTH ANNA POWER STATION. UNITS 1 AND 2 DOCKET NOS. 50-338 AND 50-339 ENVIRONMENTAL ASSESSMENT AND FINDING OF i
NO SIGNIFICANT IMPACT l
The U.S. Nuclear Regulatory Commission (the Commission) is considering issuance of an exemption from certain requirements of its regulations with respect to Facility Operating License No. NPF-4 and Facility Operating License No. NPF-7, issued to Virginia Electric and Power Company (VEPCO, the licensee) for operation of the North Anna Power Station, Units 1 and 2 (NAPS 1&2), located in Louisa County, Virginia.
ENVIRONMENTAL ASSESSMENT Identification of Procosed Action:
The proposed action is in accordance with the licensee's application dated March 3,1998, as supplemented May 5,1998, conceming the use of respiratory protection equipment which has not been tested by the National Institute for Occupational Safety and Health /Mine Safety and Health Administration (NIOSH/MSHA). Pursuant to 10 CFR 20.2301, the licensee has requested i
exemptions from the following:
l 1.
10 CFR 20.1703(a)(1) which requires that "... the licensee shall use only respiratory protection equipment that 'is tested and certified or had certification extended by NIOSH/MSHA;"
2.
10 CFR 20.1703(c) which requires that "the licensee shall use as emergency devices only respiratory protection equipment that has been specifically certified or had certification extended for emergency use by NIOSH/V.SHA;" and 3.
10 CFR Part 20 Appendix A. Protection Factors for Respirators, Footnote d.2.(d), which states, in part, that ".... :ne protection factors apply for atmosphere supplying respirators j
only when supplied with adequate respirable air. Respirable air shall be provided of the quality and quantity required in accordance with NIOSH/MSHA certification (described in 30 CFR Part 11). Oxygen and air shall not be used in the same apparatus:"
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- The Need for the Prooosed Action
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Subpart H to 10 CFR Part 20, " Respiratory Protection and Controls to Restrict Intemal L
Exposure in Restricted Areas" states in 10 CFR 20.1702, "When it is not practical... to control the concentrations of radioactive material in air to values below those that define an airbome radioactivity area, the licensee shall, consistent with maintaining the total effective dose equivalent ALARA, increase monitoring and limit intakes by... (c) Use of respiratory protection equipment.... "
It is necessary for station personnel to periodically enter containments while the units are l
operating in order to perform inspection or maintenance. The NAPS 1&2 containments are j
l designed to be maintained at subatmospheric pressure during power operations. The containment pressure can range from 9.0 to 11.0 pounds per square inch, absolute (psia). This containment environment could potentially impact the safety.of personnel donning respiratory protection equipment, due to reduced pressure and resulting oxygen deficiency. Under these circumstances, the use of a self-contained breathing apparatus (SCBA) with enriched oxygen breathing gas is required. The licensee initially purchased Mine Safety Appliances, Inc. (MSA)
Model 401 open-circuit, dual-purpose, pressure-demand SCBAs constructed of brass compenents which were originally intended for use with compressed air. The licensee qualified the Model 401 cylinders for use with 35% oxygen /65% nitrogen following the recommendations of the Compressed Gas Association's Pamphlet C-10," Recommended Procedures for Changes of Gas Service for Compressed Gas Cylinders," established procedures to utilize these devices with an enriched oxygen mixture, and is currently using these SCBAs with a 35%
oxygen /65% nitrogen mixture instead of compressed air. The MSA Model 401 SCBA has received the NIOSH/MSHA certification for use with compressed air, but has not been tested for 35% enriched oxygen applications. Using these SCBAs without the NIOSH/MSHA certification requires an exemption from 10 CFR 20.1703(a)(1),10 CFR 20.1703(c), and 10 CFR Part 20 Appendix A, Protection Factors for Respirators, Footnote d.2.(d).
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3-Environmentalimoacts of the Procosed Action:
The proposed action will not alter plant operations, result in an increase in the probability or consequences of accidents, or result in a change in occupational or offsite dose. Therefore, there are no significant radiological impacts associated with the proposed action.
With regard to potential nonradiological impacts, the proposed action will not result in a change in nonradiological plant effluents and will have no other nonradiological environmental impact.
Accordingly, the Commission concludes that there are no significant environmental impacts associated with the proposed action.
Attematives to the Proposed Action:
Because the Commission's staff has concluded that there is no significant environmental
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impact associated with the proposed exemption, any altemative to the proposed exemption will l
have either no significantly different environmental impact or greater environmental impact.
The principal alternative would be to deny the requested exemption. Denial would result in no change in current environmental impact.
Altemative Use of Resources:
This actie doas not involve the use of resources not previously considered in connection with the Final Environmental Statement related to the operation of North Anna Power Station, l
Units 1 and 2, issued by the Commission in April 1973.
Aaencies and Persons Consulted:
In accordance with its stated policy, the NRC staff consulted with Mr. Foldesi of the l.
Virginia Department of Health on June 23,1998, regarding the environmentalimpact of the
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l proposed action. Mr. Foldesi had no comments on behalf of the Commonwealth of Virginia.
l FINDING OF NO SIGNIFICANT IMPACT
~ Based upon the foregoing environmental assessment, the Commission concludes that the proposed action will not have a significant effect on the quality of the human environment.
Accordingly, the Commission has determined not to prepare an environmental impact statement for the proposed exemption.
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- March 3,1998, as supplemented May 5,1998, which is available for public inspection at the Commission's Public Document Room,2120 L Street, NW., Washington, DC 20555 and at the local public document room located at the Alderman Library, Special Collections Department, University of Virginia, Charlottesville, Virginia 22903-2498.
Dated at Rockville, Maryland this 22nd day of July,1998.
FOR THE NUCLEAR REGULATORY COMMISSION
/,
f P T. Kuo, Act ng Director f
Project Directorate 11-1 Division of Reactor Projects - t/Il Office of Nuclear Reactor Regulation l
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