ML20204G663

Environ Assessment & Finding of No Significant Impact Re 861231 Request for Exemption from Type C Testing Requirements of App J to 10CFR50

ML20204G663
Person / Time
Site:	Sequoyah
Issue date:	03/17/1987
From:	Youngblood B Office of Nuclear Reactor Regulation
To:
Shared Package
ML20204G661	List: ML20204G656 ML20204G663
References
NUDOCS 8703260437
Download: ML20204G663 (3)

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7590-01 UNITED STATES kUCLEAR REGULATORY COMMISSION TENNESSEE VALLEY AUTHORITY DOCKET NOS. 50-327 AND 50-328 ENVIRONMENTAL ASSESSMENT AND FINDING 0F NO SIGNIFICANT IMPACT The U. S. Nuclear Regulatory Commission (the Commission) is considering issuance of an exemption from the Type C testing requirements of Appendix J to 10 CFR Part 50 to the Tennessee Valley Authority (the licensee) for the Sequoyah Nuclear Plant, Units 1 and 2, located at the licensee's site in Hamilton County, Tennessee. The exemption was requested by the licensee by letter dated December 31, 1986.

ENVIRONMENTAL ASSESSMENT Identification of Proposed Action: The exemption will permit the licensee to exclude from Type C leak rate testing valves located in the residual heat removal (RHR), upper head injection (UNI), and pressure relief piping in the

! chemical volume and control system (CVCS). Appendix J requires that the licensee perform leak rate testing of valves that serve as containment iso-lation valves. The need for the exemption arose because the licensee redesignated the affected valves as remote-manual containment isolation valves.

l Type C testing cannot be perforned due to the lack of manual or remote-l manual block valves in the line that are necessary to allow such testing.

With respect to the CVCS, block valves cannot be installed because the American Society of Mechanical Engineers' Code prohibits block valves in pressure relief lines.

The Need for the Proposed Action: The proposed exemption is needed to permit l the licensee to operate the plant without being in violation of the Commission's requirements.

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Environmental Impact of the Proposed Action: The proposed exemption is from )

the testing requirements of Appendix J. The need for such testing is to ensure that once the valves close they do not leak, following an accident. However, i i leakage should occur, the leakage would be into closed systems which are not i open to the environment. Therefore, the exemption does not involve a signifi- j cant environmental impact.

l Alternative to the Proposed Action: Because the staff has concluded that there is no significant impact associated with the proposed exemption, any alternative to the exemption will have either no environmental impact or greater environmental impact. l Alternative Use of Resources: This action does not involve the use of resources l not previously considered in connection with the " Final Environmental Statement l

Related to the Operation of Sequoyah Nuclear Plant, Units 1 and 2," dated July 1974.

! Agencies and Persons Consulted: The NRC staff reviewed the licensee's request

!^ that supports the proposed exemption. The NRC staff did not consult other agencies or persons.

FINDING OF NO SIGNIFICANT IMPACT The Commission has determined not to prepare an environmental impact statement for the proposed exemption.

Based upon the environmental assessment, we conclude that the proposed action will not have a significant effect on the quality of the human environment. -

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For details with respect to this action, see the request for exemption dated December 31, 1986, which is available for public. inspection at the Commissi n's Public Document Room,1717 H Straet, N. W. , Washington, D. C.,

and at the Chattanooga-Hamilton County Bicentennial Library,1001 Broad Street, Chattanooga, Tennessee 37401.

Dated at Bethesda, Maryland, this 17* day of March 1987.

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FOR THE NUCLEAR REGULATORY COMMISSION'

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B. J. Youngblood, Director PWR Project Directorate #4 Division of PWR Licensing-A Office of Nuclear Reactor Regulation

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