ML20137K796

Final Potential Part 21 & Deficiency Rept CDR 85-00-12 Re Error in Gt Strudl Computer Program.Generic Evaluation Performed.No Vendors Use Program for Equipment Design.Item Not Reportable Per 10CFR50.55(e)

ML20137K796
Person / Time
Site:	Seabrook
Issue date:	01/15/1986
From:	Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:	Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
REF-PT21-86-064-000 CDR-85--12, CDR-85-00-12, PT21-86-064-000, PT21-86-64, SBN-924, NUDOCS 8601240222
Download: ML20137K796 (3)

Text

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I SEABROOK STATION Engineering Office Pubic Service of New Hampshire nuary , 6 New Hampshire Yankee Division SBN-924 T.F. Q2.2.2 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 Attention: Mr. Richard W. Starostecki, Director Division of Project and Resident Programs

References:

(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) PSNH Letter SBN-895, dated November 15, 1985, " Interim 10CFR50.55(e) Report: GT STRUDL Computer Program Error,"

J. DeVincentis to R. W. Staroatecki

Subject:

Final 10CFR50.55(e) Report: GT STRUDL Computer Program Error (CDR 85-00-12)

Dear Sir:

On November 15, 1985 [ Reference (b)], we committed to provide a final report on our evaiaation of the potential deficiency cauaed by an error in the GT STRUDL Computer Program. We have completed the evaluation of this deficiency and have determined it not to be a reportable 10CTR50.55(e) condition.

Description of Deficiency The GT STRUDL Computer Program was used in the design and analysis of a number of HVAC, piping and I&C supports for Seabrook prior to January 1984.

In performing an analysis check on a previously completed HVAC support designed with the GT STRUDL Program, an error was discovered in the section of

.the program that calculates frequencies using the Rayleigh Quotient Method.

Georgia Tech confirmed the error in all versions of the program prior to the 84.03 Release. The error had unknowingly been corrected in all subsequent releases including the 84.03 version. ,

I l

8601240222 860115 PDR ADOCK 05000443 g PDR P.O. Box 300 Seobrook, NH 03874 . Tefephone (603) 474-9521 ,O t i l

United States Nuclear Regulatory Commission Attention: Mr. Richard W. Starostecki Page 2 Analysis of Safety Implications All support designs which used the Rayleigh Quotient Method were potentially affected by this item and required evaluation.

Vendor furnished safety-related equipment required evaluation for any design deficiencies.

Corrective Action Initially, a sample of 25 computer runs potentially effected by the GT STRUDL error were reviewed. The result of this review indicated that none of the 25 support designs were impacted by this error.

Subsequently, a generic evaluation of this problem for all potentially affected HVAC supports was performed. The result of this evaluation also indicated that none of the HVAC supports were impacted by the GT STRUDL error.

In addition, all piping and I&C supports potentially affected by this error were reviewed and found to be unaffected by the GT STRUDL error.

In reference to the potential impact on the work performed by equipment vendors, we have determined that none of the vendors used the subject computer program for equipment design.

Based on the above, we have concluded that this item is not a reportable 10CFR50.55(e) condition.

Very truly yours, d

John DeVincentis, Director Engineering and Licensing cc: Atomic Safety and Licensing Board Service List Director, Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555

William S. Jordan, III Donald E. Chick Diane Curran Town Manager Ha rmon, Weiss & Jordan Town of Exeter 20001 S. Street, N.W. 10 Front Street Suite 430 Exeter, NH 03833 Washington, D.C. 20009 Brentwood Board of Selectmen Robe r t G. Perlis RED Dalton Road Office of the Executive Legal Director Brentwood, NH 03833 U.S. Nuclear Regulatory Commission Washington, DC 20555 Richard E. Sullivan, Mayor City Hall Robert A. Backus, Esquire Newbu ry po r t , MA 01950 116 Lowell Street P.O. Box 516 Calvin A. Canney Manc hester, NH 03105 City Manager City Hall Philip Ahrens, Esquire 126 Daniel Street Assistant Attorney General Portsmouth, NH 03801 Augusta, ME 04333 Dana Bisbee, Esquire Mr. John B. Tanzer Assistant Attorney Gene ral Designated Representative of Of fice of the Attorney General the Town of Hampton 206 State Ifouse Annex 5 Morningside Drive Concord, NH 03301 Hampton, NH 03842 Anne Ve rge , Chairperson Robe rta C. Pevear Boa rd of Selec tmen Designated Representative of Town liall the Town of Hampton Falls South Hampton, NH 03827 Drinkwater Road Hampton Falls, NH 03844 Patrick J. McKeon Selectmen's Office Mrs. Sandra Gavutis 10 Central Road Designated Representative of Rye, NH 03870 the Town of Kensington RFD 1 Ca role F. Kagan, Esquire East Kingston, NH 03827 Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Jo Ann Shotwell, Esquire Washington, DC 20555 Assistant Attorney General Envi ronmental Protec tion Bureau Mr. Angi Machiros De pa rt me n t of the Attorney Gene ral Chairman of the Board of Selectmen One Ashburton Place, 19th Floor Town of Newbury Boston, MA 02108 New bu ry , MA 01950 Senator Gordon J. Humphrey Town Manager's Office U.S. Senate Town Hall - Friend St reet Washington, DC 20510 Amesbury, MA 01913 (ATTN: Tom Burac k)

Senator Gordon J. liumphrey Diana P. Randall 1 Pillsbury St reet 70 Collins St reet Concord, Nil 03301 Seabrook, NH 03874 (ATIN lie rb Boynton)