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w..wwa d61N Memo For: J. B. Hoch, PG&E i
From: D. F. Kirsch, USNRC l
Reference:
SSER-21 Allegations 92 & 93 and the Welding Symbology l Issue l
l .
l A. Discussions with a concerned citizen on February 2, 1984 have - - -
1 identified the following concerns. _
i
i steel and structures instead of the 45' prep angle required !
by AWS-D1.1. Reference was made to a June 23, 1983 memo on !
[ Bevel detail revision signed by Russ Noble to H. Karner. 1 This memo specifies that a 45' bevel angle is to be used in the future, without providing any assessment of or resolution for past practice discrepancies. Thus, the implication is clearly that the field installed conditior, does not provide adequate assurance that the design assumptions of the design engineer were compliea with. In this case the designer assumed a 45' bevel angle and, allegedly, the field used a 37.5* bevel angle. The AWS code requires that load derating factors be used if the bevel angle is less than 45' and, since the designer didn't use the.derating factors, it is alleged that the field installed l condition is less conservative than the designer's intent.
- 2. It has been alleged that the Site and Genertl Office design Ok4 groups did not properly account for tube stel radius that actually existed in the field. Specifica11/;thefollowing x
i pec, alSfB4 points were made:
- a. Some of the tube steel supplied by foreign l
j- Qqy manufacturers (Japan) had an outside radius of 1.5T at the corners, where T is the steel section thickness.
)
l l M'7 %WS The American Tube Manufacturers Institute requires the radius to be between 2T and 3T.
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- b. The on-site design group assumed 2T in their h g M eauv 4f') calculation of flare bevel weld effective throat.
M SMW c. The San Francisco design group allegedly aesumed 3T in I f M M 6% their calculations of flare bevel weld effective throat.
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- d. Therefore, it has been alleged that the effective throats, existing in the field on the steel with 1.5T )
radius, will not be sufficient to satisfy the design requirements. ..
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I Memo for J. '3. Hoch e. ArelatedconcernherMsthattheAWSD1.1 requires, 7 and assumes, "flush" welding on tube steel to obtain the AWS DI.1 required effective throat of 5/16 R, where R is the outside Radius of the tube steel corner while l ESD-223 apparently allows less than "flush" welding, contrary to AWS assumptions without. having sufficient tests run to establish the acceptability of less than "flush" welding.
- f. In addition, F1,0-223 allegedly allows going to a 15' dihedral angle with no corrections applied as required 3 by the New AWS 01.1 ccde. This AWS D1.1 requires using {
effective throat derating factors of 1/4" for a i dihedral angle between 30* and 45' and a 1/8" deduction between 45' and 60'. A dihedral angle of less than 30' would require even more of a deduction from the effective throat design. ,
- g. Thus, the skewed fillet weld table in ESD-223 is alleged to be wrong because it doesn't adjust the leg i length to account for the designer's assumed effective
} M*M throat and f44e installations are, therefore, less l
conservative than the designer's intent.
PG&E is requested to fully evaluate and resolve these issues and p.rovide a written report to the NRC-Region V documenting those evaluatiors and findings, including any necessary reinspections or corrective actions. This response is required as-soon-as-possible.
Respectfully, D. F. Kirsch, Chief Reactor Safety Branch, i I
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j THE HOWARD P. FOLEY COMPANY [h$ NUMBER: 8802-/S.50 INSPECTION REPORT Page 1 of 1 p;gPREPARED BY: C. Herrmann/R.D. Risinger ATTACICLENTS DATE: 8-15-83 I i
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's ITDiS INSPECTED: QCP-5 App. I 8-08-83 UNIT I X UNIT II X 5! ][,p -
ION: ' Various
%INSPECTIO'N CRITERIA Oon^wtxo:
.$l*'tJ' Ww .~ OSPECIFICATION: @ PROCEDURE: l py DOCUMD(T TITLE AND NUMBER: qc,p $ Appsm X RESULTS OF INSPECTION: *
, '1. PCN 7 deleted performance qualifications M-10 from QCP-5 App. I. (is" 5. S . s oc ke t weld qualification.) Consequently there are no WP's in the procedure books to ff verify qualifications.
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QW-303.5 fillet welds require that."welders who make fill'et welds $n pipe or tube
, J. '- less than 2 7/8 in. O.D". must pass the pipe fillet test per QW-452. 4 .....
9.T r Currently there are no welders qualified to weld on pipe or tubing less than 2 7/8 F' ' in. 0.D. W.i SSUE E ru.E MAXI INTO NCP h WA- _OIHER INITIATED BY: b NRAM@%/ DATE: T!/6!?3 4
~ DISPOSITION g g g
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M h QUALITY CONTROL SUPERVISOR RE7IEW: ACCEPT e/ REJECT
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- DATE: e j' SIGNATUREQ/ ^
DATE: /8,/M
%yCLOSE'00TCOMMENTS: TC. N. \7 "P.E -tn 5
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i pACCEPT' :f . , , ROLD TAC # lh h2cNATURE. /NN g SIcNArURE ,f IM[/.,_p
, DATE' /d DATE DATE # /[. #3 e
h~r t . EPF/IR 6-28-83 #
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O!as_e to File (date) R R g' '
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THE HOWARD P. FOLEY COMPA11Y NO.
$7 *'..' -
?'". INSPECTION REPORT - CONTINUATION SREET
' 0302-1330 T*
CONTINUATION OF: RESULTS OF INSPECTION O PAGE o 0F o
's - PROPOSED DISPOSITION (S 4 CORRECTIVE ACTION TAKEN O DATE Y ' 6/16/63
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rw x. , , wy .. .. . l 'g' ;;W(th the deletion of WPS M-10 f rom Appendix I of QCP-5, two weld
.h'IProced'ureSpecifications.remainwhichareacceptabicforWolderPerforraance l
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jQualificuions. Specifically, in QCP-5D, WPS !!-01 and M-03 quality a
l E')wolder'tNmake1/4"@ cubing and larger socket velds.
Additionally, A'WPS !! 10 vill be included in the next PCN to QCP-SD.
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M 2. QW-303.5 no longer exists. (See Winter '82 addenda to AS11E Sec. IX). QW 303.1 states, in part,
" ... welders who pass the required tests for .- groove welds shall also be qualified to make fillet welds in all thicknustes
['6nd pipe diameteas of any size within the liuits of the welding variables Included in QW-350 "Welding Variables for Welders", under k'ofQW-350." nit' con orm to QW-452. Y .GTAW Essential Variables, QW-403.16 requiresOr pq 'rooveb Weld tG Tests" >$c e qualilies
.TE Qii-452.6 "Fillet Qualification By Plate -rrri-Q: fillet velds of all sizes, material thicknesses and diameters. -1[
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j*I QW.442 SUGGESTED FORMAT FOR WELDING PROCEDURE SPECIFICATION (WPS) (See OW.201.1, section IX. ASME Boiler and Preuvre Wesel Cedel 2 Nsupporting U-)bpon No.ge: M-1 s Company Nema The H.P. Foley Cotopany - av:
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. . . weieing Procedure SpecsAcetion No. M-10 cie 4-18-83 OR
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,%!? 9.. ': weeding Proceewee; _ CTAW (Stainiess to Stsin1ess)r voom Ma.nua ..l
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gu ,3 n .002 eo .008 gap Dip *-':37 stsidies, Proeucson orewings, weid symtw,:e or wrmen o f peAir ' emiscon showed show the genersi arrangement of the ports to re ' ~ -- - be_e pe .T o nunee.apocaig .end . erie -dese,se : a .;,r.- u of weid gree., mey be openned. j W- 1/16,, gap EEU. W% ).R (At the opson of sie Mfor., she ches may be etteched to muetrete ' ' pint veelen. .ein inyer, e.,d beed e..w.nce .. e for vie:ch N,,k.h.'Mk. n soughree procederse, for muniple procees proe dwree. etc. 1/4"\tubing g . r g *
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- P.No. O Group % . ' I - to P.No. O W. _ . . Grovo No. I '
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specanceoon type end gree. ~"~ ASTM A213 TP316
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no Specmceuen type end orace K5MFTT316 4 on
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METALS (QW.ec4) . F.No. A - osser y%t* ' A.% 8 nthe, v s" Spec. No. (SFA) T-Q - f~ *.
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D E (s s .lM_1 [M. h.- ' y "gg Tulotusj WENS ATTACm1ENTS: YES i
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i INSPECTION REPORT
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.i, ESULTS OF INSPECTION: (,,d 7. h t U M (E k g,,4 A g h g M g 3 ru.Dii' b 04 LO d 051 O Sbl4lESS She-[ [<d6 '
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k 'qiC',' INSPECTOR ^ , h ^ACCb',t. - REJECT HOLD TAG # QC SUPERVISOR FINAL: h
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