ML20044G987
| ML20044G987 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 05/28/1993 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | NORTHEAST NUCLEAR ENERGY CO. |
| Shared Package | |
| ML20044G980 | List: |
| References | |
| NUDOCS 9306070146 | |
| Download: ML20044G987 (3) | |
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UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION In the Matter of
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NORTHEAST NUCLEAR ENERGY COMPANY
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Docket No. 50-245
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(Millstone Unit 1)
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EXEMPTION I.
The Northeast Nuclear Energy Company (NNEC0, the licensee) is the holder of Facility Operating License No. DPR-21 which authorizes operation of Millstone Nuclear Power Station, Unit 1.
The license provides, among other things, that Millstone Unit 1 is subject to all rules, regulations, and Orders of the Commission now or hereafter in effect.
The plant is a boiling water reactor at the licensee's site located in New London County, Connecticut.
II.
One of the conditions of all operating licenses for water-cooled power reactors, as specified in 10 CFR 50.54(o), is that primary reactor containments shall meet the containment leakage test requirements set forth in 10 CFR Part 50, Appendix J.
Title 10, CFR Part 50, Appendix J,Section III.C requires containment isolation valves to undergo local leak rate (Type C) testing.
The purpose of the testing, and any subsequent. repairs, is to assure that leakage through 9306070146 930528 PDR-ADOCK 05000245 p
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b these valves will not result in an unacceptable release of containment atmosphere during, or following, a design basis accident. Appendix J Section III.C.1 states, in part, Type C tests shall be performed by local pressurization. The pressure shall be applied in the same direction as that when the val [v]e would be required to perform its safety function, unless it can be determined that the results from the tests for a pressure applied in a different direction will provide equivalent or more conservative results.
By letter dated June 5, 1991, the NRC staff granted an exemption from the requirements of 10 CFR Part 50, Appendix J Paragraph III.C.1 for certain penetrations at Hillstone Unit 1.
Specifically, the exemption granted exemptions for Penetrations X-25, X-26, X-202E 2nd X-205.
In a letter dated April 15,1993, NNEC0 stated that one of the penetrations was not correctly identified in NNEC0's request dated April 29, 1988, and in the exemption which was issued on June 5, 1991. NNEC0 stated that Penetration X-202E should have been X-2020, and requested that the exemption be corrected. The justification for the exemption granted for penetration X-202E in the June 5, 1991, letter applies to penetration X202D.
Penetration X-202E is for a vacuum breaker (torus to drywell) and does not require 10 CFR Part 50, Appendix J testing.
The proposed action would correct the administrative error.
III.
l Accordingly, the Commission has determined that, pursuant to 10 CFR 50.12(a), the requested exemption amendment is authorized by law, will not present an undue risk to the public health and safety, and is consistent with the common defense and security.
Further, the Commission finds that special circumstances are present in that application of the regtilation in these particular circumstances would not serve the underlying purpose of the rule i
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.. and is not necessary to achieve the underlying purpose of the rule. The exemption amendment would correct an administrative error.
The Commission hereby grants an exemption amendment to the exemption granted June 5, 1991, and authorizes that Penetration X-202E be correctly identified as X-2020.
The exemption amendment is subject to modification by rule, regulation or order of the Commission.
Pursuant to 10 CFR 51.32, the Commission has determined that the issuance of the exemption amendment will have no significant impact on the quality of the human environment (58 FR29642).
This exemption amendment is effective upon issuance.
FOR THE NUCLEAR REGULATORY COMMISSION Original signed by:
Steven A. Varga, Director Division of Reactor Projects - I/II Office of Nuclear _ Reactor Regulation Dated at Rockville,1993Maryl and M
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