ML20199C351
| ML20199C351 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 06/13/1986 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | Noonan V Office of Nuclear Reactor Regulation |
| References | |
| SBN-1113, NUDOCS 8606180088 | |
| Download: ML20199C351 (3) | |
Text
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SEABROOK STATION Enginsering Offica June 13, 1986 PutWe Service of New Hampshire SBN-1113 T.F.
B7.1.2 NEW HAMPSHIRE YANKEE DIVISION United States Nuclear Regulatory Commission Washington, DC 20555 Attention:
Mr. Vincent S. Noonan, Project Director PWR Project Directorate No. 5
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) PSNH Letter (SBN-1017), dated April 24, 1986, " Fire Protection Site Audit; Response to Open Items",
J. DeVincentis to V. S. Noonan
Subject:
Structural Steel Protection From Fire
Dear Sir:
As a result of discussion with the Staf f on June 12, 1986, the following additional information is provided to support our request for deviation from 10CFR50, Appendix R, III.G.a provided in Reference (b).
Professional Loss Control, Inc., (PLC) conducted a Seabrook Structural Steel Survivability Analysis as indicated in Reference (b).
The methodology used to evaluate Seabrook's structural steel is the same as that used on Limerick Generating Station, Units 1 and 2, also done by PLC.
Using the results of the PLC analysis, a structural integrity review was conducted.
The review assumed those elements of steel which could potentially be lost were lost, and the integrity of the remaining concrete slab and supporting steel framing was checked. The following assumptions were considered:
1.
Dead load.
2.
Snow load.
3.
Equipment loads.
4.
No seismic loads.
8606180088 860613 PDR ADOCK 0D000 3
F (3d5 l Seabrook Station Construction Field Office. P.O. Box 700 Seabrook. NH O3874 II
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United States Nuclear Regulatory Commission Attention:
Mr. Vincent S. Noonan Page 2 5.
Soil pressure, surcharge, compaction, and hydrostatic pressure.
6.
Load f actor for the above loads considered to be one.
7.
Rebar yield stress (fy) assumed _ equal to 30,000 psi to allow for elevated temperatures due to fire.
Those steel elements which were required for structural integrity and were identified in the PLC analysis as potentially exposed to high temperatures (in excess of Il00*F) were fire proofed.
We trust this information is satisfactory and request the reso-
- lution of this item be reflected in the next supplement to Seabrook's SER.
Very truly y urs, A
h John DeVincentis Director of Engineering cc: Atomic Safety and Licensing Board Service List
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- A.". Dicn3 Curren E:quiro Csivin A. Ccnnoy H:rmon & Weiss City Ninrger 2001 S. Street, D.W.
City Hall Buite 430 126 Daniel Street Washington, D.C.
20009 Portsmouth, NH 03801 Sherwin E. Turk, Esq.
Stephen E. Merrill, Esquire Office of the Executive Legal Director Attorney General U.S. Nuclear Regulatory Commission George Dana Bisbee, Esquire Tenth Floor Assistant Attorney General Washington, DC 20555 office of the Attorney General 25 Capitol Street Robert A. Backus, Esquire Concord, NH 03301-6397 116 Lowell Street P.O. Box 516 Mr. J. P. Nadeau Manchester, NH 03105 Selectmen's Office 10 Central Road Philip Ahrens, Esquire Rye, NH 03870 Assistant Attorney General Department of The Attorney General Mr. Angie Machicos Statehouse Station #6 Chairman of the Board of Selectmen Augusta, ME 04333 Town of Newbury Newbury, MA 01950 Mrs. Sandra Cavutis Chairman, Board of Selectmen Mr. William S. Lord RFD 1 - Box 1154 Board of Selectmen Kennsington, NH 03827 Town Hall - Friend Street Amesbury, MA 01913 Carol S. Sneider, Esquire Assistant Attorney General Senator Gordon J. Humphrey Department of the Attorney General 1 Pillsbury Street One Ashburton Place, 19th Floor Concord, NH 03301 Boston, MA 02108 (ATTN: Herb Boynton)
Senator Cordon J. Humphrey H. Joseph Flynn, Esquire U.S. Senate Office of General Counsel Washington, DC 20510 Federal Emergency Management Agency (ATTN: Tom Burack) 500 C Street, SW Washington, DC 20472 l
Richard A. Hampe, Esq.
Hampe and McNicholas Paul McEachern. Esquire 35 Pleasant Street Matthew T. Brock, Esquire Concord, NH 03301 Shaines & McEachern 25 Maplewood Avenue f
Thomas F. Powers, III P.O. Box 360 Town Manager Portsmouth, NH 03801 Town of Exeter 10 Front Street Gary W. Holmes, Esq.
Exeter, NH 03833 Holmes & Ells 47 Winnacunnet Road Brentwood Board of Selectmen Hampton, NH 03842
~RFD Dalton Road i
Brentwood, NH 03833 Mr. Ed Thomas FEMA Region I l
Peter J. Mathews, Mayor 442 John W. McCormack PO & Courthouse City Hall Boston, MA 02109 Newburyport, MA 01950 Robert Carrigg Town Office i
Atlantic Avenue North Hampton, NH 03862 l
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