ML20138C095

Forwards Analysis of Electrical Separation Criteria for Seabrook Station. Results of Test Program Analyzed to Develop Revised Separation Criteria for Facility W/Values Less than Std Criteria

ML20138C095
Person / Time
Site:	Seabrook
Issue date:	03/31/1986
From:	Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:	Noonan V Office of Nuclear Reactor Regulation
Shared Package
ML20138C100	List: ML20138C095 ML20138C103
References
SBN-979, NUDOCS 8604020220
Download: ML20138C095 (4)

Text

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3w SEABROOK STATION Engineering Office Pub 8c Service of New Hampshes March 31,1986 Mew Hampshire Yankee Division SBN- 979 T.F. B7.1.3 United States Nuclear Regulatory Commission Washington, DC 20555 Attention: Mr. Vincent S. Noonan, Project Director PWR Project Directorate No. 5

Reference:

(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444

Subject:

Electrical Separation Criteria

Dear Sir:

I Seabrook has committed to meeting the requirements of FSAR Appendix 8A, IEEE Standard 384-1974, and Regulatory Guide 1.75, Revision 2 for electrical cable and raceway separation. These documents provide two options to establish separation criteria; use standard criteria given in these documents or provide an analysis based on a test program to justify criteria less than standard criteria. The FSAR presently indicates that Seabrook used the standard criteria.

In response to various separation concerns that have developed during construction and because certain raceway configurations (e.g., conduit to cable tray) are not clearly defined in the standards, a test program tus undertaken to evaluate the acceptability of separation distances which are less than the standard criteria. The results of this test program have been analyzed to develop a revised separation criteria for Seabrook with values less than the standard criteria. This analysis is provided in Enclosure 1 (Analysis of Seabrook Electrical Separation Criteria).

Also provided herewith, an Enclosure 2, are revised excerpts of FSAR Sections 1.8, 7.1, 8.2, and 8.3. These changes indicate that Seabrook's basis for establishing separation criteria is now based on both the standard criteria and on an analysis and test program. These revised excerpts will be incorporated into the FSAR by a future amendment.

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P.O Box 300

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United States Nuclear Regulatory Commission Attention: Mr. Vincent S. Noonan Page 2 1

d It should be noted that the test results are documented in a Wyle Report. We will, if requested by the staff, make this report available for the staff's information and use out of our Bethesda Office.

We do request that the acceptability of the revised separation criteria be reflected in the next supplement to Seabrook's SER.

Very truly yours, g p, ,/>4 J. DeVincentis, Director Engineering and Licensing Enclosures

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Atomic Safety and Licensing Board Service List 4

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't Diane Curran Pstcr J. Mathews, Mayce Harmon & Weiss City Hall 20001 S. Street, N.W. Newburyport, MA 01950 Suite 430 Washington, D.C. 20009 Calvin A. Canney City Manager Sherwin E. Turk, Esq. City Hall Office of the Executive Legal Director 126 Daniel Street U.S. Nuclear Regulatory Commission Portsmouth, NH 03801 Washington, DC 20555 Stephen E. Merrill Robert A. Backus, Esquire Attorney General 116 Lowell Street- Dana Bisbee, Esquire P.O. Box 516 Assistant Attorney General Manchester, NH 03105 Office of the Attorney General 25 Capitol Street Philip Ahrens, Esquire Concord, NH 03301-6397 Assistant Attorney General-

< Department of The Attorney General Mr. J. P. Nadeau j Statehouse Station #6 Selectmen's Office Augusta, ME 04333 10 Central Road Rye, NH 03870 1 Mrs. Sandra Gavutis Designated Representative of Mr. Angie Machiros

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the Town of Kensington Chairman of the Board of Selectmen

RFD 1 Town of Newbury I East Kingston, NH 03827 Newbury, MA ~ 01950 t

Jo Ann Shotwell, Esquire Mr. William S. Lord j Assistant Attorney General Board of Selectmen Environmental Protection Bureau Town Hall - Friend Street Department of the Attorney General Amesbury, MA '01913 One Ashburton Place, 19th Floor Boston, MA 02108 Senator Gordon J. Humphrey l

1 Pillsbury Street Senator Gordon J. Humphrey Concord, NH 03301 U.S. Senate (ATTN: Herb Boynton)

Washington, DC 20510

' H. Joseph Flynn (ATTN: Tom Burack) office of General Counsel Diana P. Randall Federal Emergency Management Agency 70 Collins Street 500 C Street, SW Seabrook, NH 03874 Washington, DC 20472 Richard A. Hampe, Esq. Matthew T. Brock, Esq.

Hampe and McNicholas Shaines, Madrigan & McEachern 35 Pleasant Street 25 Maplewood Avenue Concord, NH 03301 P.O. Box 360 Portsmouth, NH 03801 Donald E. Chick Town Manager Gary W. Holmes, Esq.

l Holmes & Ells j Town of Exeter

. 10 Front Street 47 Winnacunnet Road Exeter, NH 03833 Hampton, NH 03841 Brentwood Board of Selectmen Ed Thomas I RFD Dalton Road FEMA Region I Brentwood,-NH 03833 John W. McCormack PO & Courthouse Boston, MA 02109

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