ML20138C541
| ML20138C541 | |
| Person / Time | |
|---|---|
| Site: | Washington Public Power Supply System |
| Issue date: | 10/03/1985 |
| From: | Root R WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| To: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| REF-PT21-85, REF-PT21-85-439-000 GO1-85-0190, GO1-85-190, PT21-85-439, PT21-85-439-000, NUDOCS 8510220457 | |
| Download: ML20138C541 (3) | |
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Washington Public Power Supply System 3000 George Washington Way P.O. Box 968 Richland, Washington 99352-0968 (509)372-5000 October 3, 1985 G01-85-0190
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Mr. J. B. Martin
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g]m Regional Administrator Nuclear Regulatory Canmission Region V 1450 Maria Lane, Suite 210 Walnut Creek, Calif. 94596
Subject:
NUCLEAR PROIIrrS NOS. 1 AND 4 DOCKET NOS. 50-460 & 50-513 PCTTENTIALLY REPORTABLE (DNDITION 10CFR50.55(c)
GT STRLDL PROGRAM
Reference:
'Iblecon, C.R. Edwards, Supply System to D. Pereira, NRC, same subject, dated September 3,1985 In the noted reference, the -Supply System informed your office of a potentially reportable deficiency in accordance with the requirements of 10CFR50.55(e). Attachment A provicbs a statement of the identified condition and a brief description of our planned actions to correct the identified deficiency.
Based on the construction status at WNP-1, the Supply System.
will not be able to issue a final report at this time.
An update will be provid2d at construction restart.
If you have any questions or desire further information, please advise.
iL/
R. W. Root, Jr..
NNP-1 Program Director (821)
RWR:LCO:pp Attachments cc:
N.D. Anaria, UE&C (898)
E.C. Haren, UE&C (895)
NRC Document Control Desk, DC FDOC (899) 8510220457 851003 PDR ADOCK 05000460 S
'N 9
ATTADBENT A DOCKET NOS. 50-460 & 50-513 P0frENTIALLY REPORTABLE CONDITION PER 10CFR50.55(e)
GT S'IRUDL PROGRAM 4
DE90tIPTION OF DEFICIDCY
. GT S'IRUDL is a canned co:puter program (marketed by Control Data Corporation and supported by Georgia Institute of Technology) that may be used for i
structural and support analyses.
United Engineers & Constructors (UESC), as the architect engineer for the hNP-1 & 4 Projects, recently notified the i
Supply System that there is a defect relatcrl to an error in the program.
his defect has been reported to the NRC as a 10CFR Part 21 deficiency by UE&C.
It was initially-found on the Public Service Ccupany of Ncw IIanpshire Seabrook Station.
We defect was found during performance of an analysis check on a previously capleted Duct Support using the GT S'IRLDL Program. An error was discovered in the section of the program that calculates frequencies using the Rayleigh Quotient bbthod.
As a result, support designs which use the Rayleigh Frcquencies. to select seismic design loads are considered suspect and must be i
reevaluated.
ANALYSIS OF SMTPY INLICATION -
Bascd on the error in the program, structural and support analyses used for WNP-1 & 4 cbsign may be inadequate, which could lead to failure of safety related colponents.
CAUSE N IEFICIDCY As reported in the 10CFR Nrt 21 notification, attenpts to isolate the error condition to a unique set of circumstances has been unsuccessful. No further infortnation regarding the cause of the deficiency has been received fran j
Control Data Corporation.
OCERICTIVE ACTION i
We GT STRUDL Program was used by UE8C in the design of pipe supports' and duct supports.
Prior to discovery of 'this deficiency,- UE&C had decided to discontinue use of GT STRUDL for pipe support design. As a result, all pipe support final cbsigns will be reverified using a different analysis program.
We section of the program which is in error was not applied in the design of duct supports.
%e Supply System is also concerned that many of our equipnent suppliers may have used GT STRLDL.
To eliminate this concern, a review of applicable vendors is being performed.- To date, no other users of the GT S'IRUDL program have been ichntified.
d
Based on the corrective actions described above, no further action is required unless an equipnent supplier used the deficient program.
If this program was used, the cbsign for that particular item or group of items will require reverification.
ICTION 'IO PREVDir RECURRDCE Inplementation of the above corrective actions will assure that analysis wrk which used GT STRtDL is adequate to support the cbsign. GT STRI.0L will not be used until the program has been revalichted.
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