[Federal Register Volume 60, Number 26 (Wednesday, February 8, 1995)] [Notices] [Pages 7588-7589] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 95-3086] ======================================================================= ----------------------------------------------------------------------- NUCLEAR REGULATORY COMMISSION [Docket No. 50-213] Connecticut Yankee Atomic Power Company; Haddam Neck Plant; Environmental Assessment and Finding of No Significant Impact The U.S. Nuclear Regulatory Commission (the Commission) is considering issuance of an amendment to Facility Operating License No. DPR-61, issued to Connecticut Yankee Atomic Power Company (CYAPCO, the licensee), for operation of the Haddam Neck Plant, located in Middlesex County, Connecticut. Environmental Assessment Identificatjon of the Proposed Action CYAPCO has proposed to revise Technical Specification (TS) 3/4.4.9, ``Pressure Temperature Limits, Reactor Coolant System,'' Figures 3.4-3, 4, and 5, and the associated Bases section. The proposed action is in accordance with the licensee's amendment request dated April 7, 1994, as supplemented November 4, 1994. The Need for the Proposed Action NRC Information Notice 93-58, ``Nonconservatism in Low-Temperature Overpressure Protection for Pressurized-Water Reactors,'' alerted licensees of potential nonconservatisms associated with the Low Temperature Overpressurization Protection (LTOP) system resulting from pressure drop across the core. Upon review of this information, the Haddam Neck Plant adopted a conservative set of curves until new curves could be developed for the plant. These TS changes reflect the analysis performed to evaluate the brittle fracture requirements of 10 CFR Part 50, Appendix G and the ASME XI Code. These changes will ensure that the desired margins of safety against nonductile failure of the reactor vessel are maintained through all modes of operation, especially when the reactor coolant system (RCS) is at low temperatures. Environmental Impacts of the Proposed Action The Commission has completed its evaluation of the proposed revision to the TS. The staff has concluded that the proposed TS changes involving the changes in TS 3/4.4.9, ``Pressure/Temperature Limits, Reactor Coolant System,'' Figures 3.4-3, 4, and 5, and the associated Bases Section adequately address the non-conservatisms identified in NRC Information Notice 93-58 and will ensure compliance with the 10 CFR Part 50, Appendix G requirements during normal modes of operation. The staff made this determination by reviewing the plant specific analysis to assure that the proposed heatup, cooldown, and hydrostatic test, pressure/temperature limit curves have been chosen to ensure the plant is operated safely. In addition, the new P/T curves are more restrictive and conservative than the current curves. The proposed TS change will not increase the probability or consequences of accidents. No changes are being made in the types of any effluents that may be released offsite. And, there is no significant increase in the allowable individual or cumulative occupational radiation exposure. Accordingly, the Commission concludes that there are no significant radiological environmental impacts associated with this proposed TS amendment. With regard to potential nonradiological impacts, the proposed amendment does involve features located entirely within the restricted area as defined in 10 CFR Part 20. It does not affect nonradiological plant effluents and has no other environmental impact. Accordingly, the Commission concludes that there are no significant nonradiological environmental impacts associated with the proposed amendment. Accordingly, the Commission concludes that there are no significant radiological or nonradiological environmental impacts associated with the proposed amendment. Alternatives to the Proposed Action Since the Commission has concluded there is no measurable environmental impact associated with the proposed amendment, any alternatives with equal or greater environmental impact need not be evaluated. As an alternative to the proposed action, the staff considered denial of the proposed action. 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 This action does not involve the use of resources not considered previously in the Final Environmental Statement for the Haddam Neck Plant. Agencies and Persons Consulted In accordance with its stated policy, the staff consulted with the Connecticut State official regarding the [[Page 7589]] environmental impact of the proposed action. The State official had no comments. Finding of No Significant Impact Based upon the 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 amendment. For further details with respect to this proposed action, see the licensee's letter dated April 7, 1994, as supplemented November 4, 1994, which are available for public inspection at the Commission's Public Document Room, the Gelman Building, 2120 L Street, NW., Washington, DC, and at the local public document room located at the Russell Library, 123 Broad Street, Middletown, Connecticut 06547. Dated at Rockville, Maryland, this 1st day of February 1995. For the Nuclear Regulatory Commission. Phillip F. McKee, Director, Project Directorate I-4, Division of Reactor Projects--I/II, Office of Nuclear Reactor Regulation. [FR Doc. 95-3086 Filed 2-7-95; 8:45 am] BILLING CODE 7590-01-M