The U.S. Nuclear Regulatory Commission (NRC) is considering issuance of an exemption from Title 10 of the Code of Federal Regulations (10 CFR) part 50, section 50.60(b) for Facility Operating License No. 59, issued to FirstEnergy Corporation (the licensee), for operation of the Perry Nuclear Power Plant (PNPP), located in Lake County, Ohio. Therefore, as required by 10 CFR 51.21, the NRC is issuing this environmental assessment and finding of no significant impact.
Identification of the Proposed Action
10 CFR 50.60 requires that pressure-temperature (P-T) limits be established for reactor pressure vessels during normal operating and hydrostatic or leak rate testing conditions in accordance with appendices G and H to part 50. Specifically, 10 CFR part 50, appendix G, states, “The appropriate requirements on both the pressure-temperature limits and the minimum permissible temperature must be met for all conditions.” Appendix G of 10 CFR part 50 specifies that the requirements for these limits are the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (Code), section XI, appendix G limits. The licensee requested in its submittal that the staff exempt PNPP from application of specific requirements of 10 CFR part 50, section 50.60(a) and appendix G, and substitute use of ASME Code Case N-640. Code Case N-640 permits the use of an alternate reference fracture toughness (KIC fracture toughness curve instead of Kla fracture toughness curve) for reactor vessel materials in determining the P-T limits. Since the KIC fracture toughness curve shown in ASME section XI, appendix A, Figure A-2200-1 (the KIC fracture toughness curve) provides greater allowable fracture toughness than the corresponding Kla fracture toughness curve of ASME section X appendix G, Fixture G-2210 (the Kla fracture toughness curve); using Code Case N-640 for establishing the P-T limits would be less conservative than the methodology currently endorsed by 10 CFR part 50, appendix G. Therefore, an exemption from 10 CFR 50.60 would also be required. It should be noted that, Start Printed Page 13336although Code Case N-640 was incorporated into the ASME Code recently, an exemption is still needed because the P-T limits required by 10 CFR 50.60 are based on the 1989 edition of the ASME Code.
The new P-T limits calculated by the methodologies that are subject to the exemptions are incorporated into the PNPP Technical Specifications by an associated proposed license amendment submitted by the licensee. The proposed action is in accordance with the licensee's application for exemption and amendment dated June 4, 2002.
The Need for the Proposed Action
The revised P-T limits are desired to allow required reactor vessel hydrostatic and leak tests to be performed at a significantly lower temperature. These tests are to be performed during the upcoming refueling outage scheduled to commence in April 2003. The lower temperature for the tests can reduce refueling outage critical path time by reducing or eliminating the heatup time to achieve required test conditions.
Environmental Impacts of the Proposed Action
The Commission has evaluated the proposed action and concludes that the exemption and associated license amendment described above would provide an adequate margin of safety against brittle failure of the PNPP reactor vessel. Since the proposed changes do not adversely affect the integrity of the reactor vessel, the function of the vessel to act as a radiological barrier during an accident is not affected.
The proposed action will not significantly increase the probability or consequences of accidents, no changes are being made in the types of effluents that may be released off site, and there is not significant increase in occupational or public radiation exposure. Therefore, there are not significant environmental impacts associated with the proposed action.
With regard to potential non-radiological impacts, the proposed action does not have a potential to affect any historic sites. It does not affect non-radiological plant effluents and has no other environmental impact. Therefore, there are no significant non-radiological environmental impacts associated with the proposed action.
Accordingly, the NRC concludes that there is not significant environmental impacts associated with the proposed action.
Environmental Impacts of the Alternatives to the Proposed Action
As an alternative to the proposed action, the staff considered denial of the proposed action (i.e., the “no-action” alternative). Denial of the application would result in no change in current environmental impacts. The environmental impacts of the proposed action and the alternative action are similar.
Alternative Use of Resources
The action does not involve the use of any different resources that those previously considered in the Final Environmental Statement for the PNPP, dated April 1974.
Agencies and Persons Consulted
On March 11, 2003, the staff consulted with the Illinois State Official, Frank Niziolek of the Illinois Department of Nuclear Safety, regarding the environmental impact of the proposed action. The Staff official had no comments.
Finding of No Significant Impact
On the basis of the environmental assessment, the NRC concludes that the proposed action will not have a significant effect on the quality of the human environment. Accordingly, the NRC has determined not to prepare an environmental impact statement for the proposed action.
For further details with respect to the proposed action, see the licensee's letter dated June 4, 2002. Documents may be examined, and/or copied for a fee, at the NRC's Public Document Room (PDR), located at One White Flint North, 11555 Rockville Pike (first floor), Rockville, Maryland. Publicly available records will be accessible electronically from the Agencywide Documents Access and Management System (ADAMS) Public Electronic Reading Room on the Internet at the NRC Web site, http://www.nrc.gov/reading-rm-adams.html. Persons who do not have access to ADAMS or who encounter problems in accessing the documents located in ADAMS should contact the NRC PDR Reference staff by telephone at 1-800-397-4209 or 301-415-4737, or by e-mail to firstname.lastname@example.org.Start Signature
Dated at Rockville, Maryland, this 13th day of March, 2003.
For the Nuclear Regulatory Commission.
Anthony J. Mendiola,
Chief, Section 2, Project Directorate III-2, Division of Licensing Project Management, Office of Nuclear Reactor Regulation.
[FR Doc. 03-6543 Filed 3-18-03; 8:45 am]
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