ML20024E150
| ML20024E150 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 07/20/1983 |
| From: | Woolever E DUQUESNE LIGHT CO. |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, 2NRC-3-047, 2NRC-3-47, 83-04, 83-4, NUDOCS 8308090295 | |
| Download: ML20024E150 (5) | |
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$VL 2NRC-3-047 (412) 787 - 5141 Telecopy Nuclear Construction Division July 20, 1983 Robinson Plaza, Building 2, Suite 210 Pittsburgh, PA 15205 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 ATTENTION:
Dr. Thomas E. Murley Administrator
SUBJECT:
Beaver Valley Power Station - Unit No. 2 Do cke t No. 50-412 Deficiency in Bergen Paterson Welded Clevises Significant Deficiency Report No. 83-04 Gentlemen:
The attached report is the final report on the above subject. This report is submitted in ac cordance wi th the requirement s of 10CFR50.55(e) and our commitment of June 29, 1983.
DUQUESNE LIGHT COMPANY By E. J. Woolever Vice President KAT/wjs At tachment ec:
Mr. R. DeYoung, Director Of fice of Inspect ion and Enforcement (3) (w/ attachment)
Mr. G. Walton, NRC Resident Inspector (w/ attachment)
Ms. L. Lazo, NRC Project Manager (w/ attachment)
NRC Document Control Desk (w/ attachment)
SUBSCRIBED AND SWORN TO BEFORE ME THIS jo, p DAY OF
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, 1983.
Au sds F
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Not ary Pub lic ELVA G. LESONDAK. NOTARY PUBLIC RCBINSON TOWNSHIP, ALLEGHENY COUNT'.'
83 MY COMMISSION EXPIRES OCTOBER 20,1986
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- United Stctsa Nuclect Rsgulatory.Commissian Dr. Thomas E. Murley
.page 2-COMMONWEALTH-0F. PENNSYLVANIA )
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COUNTY OF ALLEGHENY
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On this,Sp at. day - of hL
/k8, before'me, a Notary Public ' in" and for kaid ' Commonwealth and County, pe rsonally appeared E.
J.. Woolever, who being duly sworn,' deposed and said that (1)
.he is Vice President of Duquesne Light, (2) he is ~ duly authorized to exe-cute and - file the fo regoing Submittal on behalf of said Company, and _(3) the statements set forth in the Submittal.~.are true and correct to the-best of his knowledge.
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Notary Public ELVA G. LESONDAK, NOTARY PUBLIC RCBINSON TOWNSHIP, ALLEGHENY COUNTY MY COMMISSION EXPIRES OCTOBER 20,1986
,,x:
United Stcteo Nuclect Rrgulatory Comnission
- Dr.'Thozcs E. Murley
- page 3 KAT/wjs
' At t achme nt bec:
R. - Coupland (w/at tachment)
C.'E. Ewing.
INPO Records Center T. J. Lex (4)
NCD File
"~
J. Pedro (NUS)
S. Phillips (W)
P. RaySircar T3)
J. Sutton (S&W)
K. A. Troxle r.
J. F. Zagorski C. R. Bishop (w/o attachment)
T. D. Jones H. M. Siegel:
R. J. Swiderski REFE RENCES : 1) Significant Deficiency Report No. 83-04 2)
Preliminary copy of Stone & Webster Report - on Potential Significant Deficiency of Pipe Rupture Res traints ( 2 DIS-18028)-
~.;..;
BEAVER' VALLEY POWER STATION - UNIT NO. '2 DUQUESNE _ LIGHT COMPANY Significant Deficiency.83 -
- "Bergen Paterson Welded Clevises"
-1.
SUMMARY
Aitotalfof 44 pipe rupture --restraints are being fabricated by Bergen-Paterson Pipe - Support - Corpo ration for BVPS-2.
In this ins t ance, -.
Bergen-Paterson is a subvendor to Applied Engineering Company.
On1May 5,
1983, a'stop work order was ' issued to Bergen-Paterson by ' Applied Engineering Company for the reasons listed below:
A. - Bergen-Paterson of fered for acceptance a total of 16 clevis assem-
-. and specificat ion
' b lies which supposedly satisfied all design ~ of the fo llowing -
requirement s.
All' 16 were.. reject ed because
' de ficiencies':
i.
The ' clevis design requires that all welds 'on the carbon steel
. clevises be = full penetration welds.
None of the 16 units had complete penetration welds.
ii. A number of welds on the subject ~ clevises _ exhibited lack of.
fusion, _ overlap or cold roll, porosity, undercut and insuf fi-
. cient weld reinforcement.
t B.
Bergen-Paterson. had _ not, pe rfo rmed nondes truct ive examinat ions in -
-accordance with approved procedures.
C.
Be rgen-Paterson could. not pr ovide ' ac cep t ab le document ation 'to satisfy specification requirements.
2.
IMMEDIATE ACTION TAKEN As ~ not ed : in S ect ion 1, 'a s to p work o rde r was issued to Bergen-Paterson on May 5,1983, for the 44 pipe rupture : restraints for BVPS-2.
~
- 3. / DESCRIPTION OF DEFICIENCY bergen-Paterson-failed to - demons trate compliance with speci fica't ion requirements Lin the ~ following instances:
A.
The clevis ' components of-the pipe ru ptur e restraints were not '
^ f abricatedt with the required full penetration welds.
The welds also exhibited lack of 2 fusion,_ overlap - or ' cold' roll, po ros ity,
' undercut, and insufficient reinforcement.
~
B. L Nondestructive examinat ions were not pe rfo rmed in accordance with approved. procedures.
L
+
c C.
Acceptable. documentation of materials, fabrication, and ins pect ion was not provided.
4.
ANALYSIS OF SAFETY IMPLICATION Most of the pipe rupture restraints supplied by Bergen-Paterson are.to be placed ins ide the cont ainment ; several will also be located in the service building.
In the case of pipe rupture, the failure of any one pipe ru ptur e -
restraint. to -perform its intended function could' cause a propagation of
- b reaks and cause the cont ainment to.
lose its int egri ty or. simply prevent the plant from attaining safe shutdown.
Even though none of the af fect ed eq uipment has. been shipped to Beaver-Valley (BV-2), the item is de emed pot ent ially repo rt ab le due to its possibility for BV-2 af fect.
5.
CORRECTIVE ACTION TO REMEDY DEFICIENCY The following correct ive actions are being implemented to remedy the deficiency and prevent its recurrence:
A.
The unaccept ab le clevis part s have been sc rapped aryl will be replaced by newly-fabricated components B.
The n'ew clevis part s wilI be required to satisfy alI conditions of the original specification.
-C. -Retraining and requalification of all Berge n-Pa terson ins pe cto rs has been accon plished.
-D.. Nondes truct ive ~ examination report s wi11 be completed and sign ed off on the same day that the ' inspection 'is performed.
E.
The new clevises are. scheduled to be completed by November - 1984.
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