ML20080D410
| ML20080D410 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 08/16/1983 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, SBN-550, NUDOCS 8308300438 | |
| Download: ML20080D410 (3) | |
Text
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SEABROOK STATION fh
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1671 Worcessor Rood Pron.Ingham, huochu.en 01701 (617) - 872 - 8100 Pub 5c Service of New Hampshire August 16, 1983 S BN-550 T.F. Q2.2.2 United States Nuclear Regulatory Commission l
Region 1 631 Park Avenue King of Prussia, PA 19406 Attention:
Mr. Richard W. Starostecki, Director Division of Project and Resident Programs l
References:
(a) Construction Permit CPPR-135 and CPPR-136, Docket l
Nos. 50-443 and 50-444 l
(o) Telecon of March 1, 1983, A. L. Legendre (YAEC) to l
Richard W. Starostecki (NRC Region I)
(c) Telecon of March 3, 1983, A. L. Legendre (YAEC) to 2d Greenman (NRC Region I)
(d) PSNH Letter, dated March 29, 1983, " Interim 10CFR50.55(e)
Report; Cooling Tower Wall / Concrete Beam Transverse Shear Stress," J. DeVincentis to R. W. Starostecki (e) PSNH Letter, dated July 15, 1983, " Interim 10CFR50.55(e)
Report; Cooling Tower Wall / Concrete Beam Transverse Shear Stress," J. DeVincentis to R. W. Starostecki
Subject:
Interim 10CFR50.55(e) Report; Cooling Tower Wall / Concrete Beam Transverse Shear Stress 1
Dear Sir:
In Reference (e), we filed an Interim 10CFR50.55(e) Report regarding the structural design deficiency af fecting certain walls and concrete beams in the cooling tower.
Description of the Deficiency Two general areas of the cooling tower structure were reported to have greater than allowable transverse shear stresses. A further review of these areas indicated that the concrete beams running north and south, which support the tile fill, are not overstressed. Also, the south wall of the cooling tower was found to be within the acceptable stress limits because of the fill concrete which is placed directly against the wall. At the lower portions of the north wall of the cooling tower basin, a potential for a transverse shear overstress condition was confirmed. The modifications required to strengthen 8308300438 830816 PDR ADOCK 05000443 S
PDR 1000ElmSt.,P.O. Box 330 Manchester,NH03105 Telephone (603J669-4000 TWX7102207595
United States Nuclear Regulatory Commission August 16, 1983 Attention:
Mr. Richard W. Starostecki Page 2 this wall are complete and documented on engineering change approvals (ECAs 014146D, 014182C, 014185B, 014199D, and 014224B). These ECAs have been signed off as work completed.
Analysis of Safety Implications Had this design deficiency not been revealed before plant operation, the area of the tower structure in question would be overstressed if all design loads, including seismic loads, were applied. Since the ultimate strengths of the portions of the structure in question will not be exceeded or approached, gross structural failure and/or collapse would not occur.
Corrective Action Taken The additional strengthening required to eliminate the overstress has been engineered and the design has been finalized. The incorporation of the design modification has been completed.
A review for transverse shear in exterior walls of all Seismic Category I structures has been performed with the result that no additional concerns were identified.
In Reference (e) we indicated that a " final report" would be submitted to Region I by August 16, 1983. We have yet to complete the degree of verification required prior to submittal of a final report. We now plan to submit a final report on this subject by September 9,1983.
Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY AM J. DeVincentis Project Manager MH0/pf cc: Atomic Safety and Licensing Board Service List Director, Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555
William S. Jcrdtn, III, Esquira Ma. Oliva L. Tz;h Harmon & Weiss Designated Representative of 1725 1 Street, N.W. Suite 506 the Town of Brentwood Washington, DC 20006 R.F.D. 1, Dalton Road Brentwood, NH 03833 Roy P. Lessy, Jr., Esquire Office of the Executive Legal Director Edward F. Meany U.S. Nuclear Regulatory Commission Designated Representative of Washington, DC 20555 the Town of Rye 155 Washington Road Robert A. Backus, Esquire Rye, NH 03870 116 Lowell Street P.O. Box 516 Calvin A. Canney Mancehster, NH 03105 City Manager City Hall Philip Ahrens, Esquire 126 Daniel Street Assistant Attorney General Portsmouth, NH 03801 Department of the Attorney General Augusta, ME 04333 Dana Bisbee, Esquire Assistant Attorney General Mr. John B. Tanzer Office of the Attorney General Designated Representative of 208 State House Annex the Town of Hampton Concord, NH 03842 5 Morningside Drive Hampton, NH 03842 Anne Verge, Chairperson Board of Selectmen Roberta C. Pevear Town Hall Designated Representative of South Hampton, NH 03842 the Town of Hampton Falls Drinkwater Road Patrick J. McKeon Hampton Falls, NH 03844 Selectmen's Office 10 Central Road Mrs. Sandra Gavutis Rye, NH 03870 Designated Representative of the Town of Kensington David R. Lewis, Esquire RFD 1 Atomic Safety and Licensing Board East Kingston, NH 03827 U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Jo Ann Shotwell, Esquire
, Assistant Attorney General Mr. Angie Machiros Environmental Protection Bureau Chairman of the Board of Selectmen Department of the Attorney General Town of Newbury One Ashburton Place, 19th Floor Newbury, MA 01950 Boston, MA 02108 Maynard B. Pearson Senator Gordon J. Humphrey 40 Monroe Street U.S. Senate Amesbury, MA 01913 Washington, DC 20510 (Attn: Tom Burack)
Senator Gordon J. Humphrey 1 Pillsbury Street Diana P. Randall Concord, NH 03301 70 Collins Street (Attn: Herb Boynton)
SEabrook, NH 03874 Richard E. Sullivan, Mayor Donald E. Chick City Hall Town Manager Newburyport, MA 01950 Town of Exeter 10 Front Street Exeter, NH 03833