ML20084M343

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Forwards Nonconformance Rept C-00804 Re Vendor Weld on Pipe Spool & Safety Concern & Reportability Evaluation 53
ML20084M343
Person / Time
Site: Midland
Issue date: 05/07/1984
From: Kinne J
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To: David Brown
STONE & WEBSTER, INC.
References
CIO-0034, CIO-34, NUDOCS 8405150333
Download: ML20084M343 (27)
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,g DOCUMENTATION TRANSMITTAL Fl40 To: Stone & Webster - CIO Transmittal No:

CIO- 0034 PO Box 1963 Date:

May 7, 1984 Midland, MI 48640 Attention:

Don Brown The documentation listed below _ is provided herewith, L was previously provided on 5-4-84 &

as requested by Don Brown 5-7-84 Documentation

Description:

Nonconformance Report C-00804 4-84 Safety Concern and Reportability Evaluation #53 7-84 CIO has X has not been placed on routine transmittal for the described documentation.

- Sff, nature 8405150333 840507

{DRADOCK 05000329 l

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CC RJCook,'NRC Site (w/a, unless voluminous)

JJHarrison, NRC Region III (w/a, unless voluminous)

DDJohnson, SMO (w/o)

JGKeppler,: NRC Region III- (w/a, unless voluminous) f(bg 3HPeck, SMO (w/o)

NIReichel, SMO (w/o)

I I RAWells, MPQAD (w/o)

CMThompson - File 24.2 (w/a, unless voluminous)

MAY 101984 I

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16 ER NO.

MID PROJECT 17 DATE ISSUED 18 REY

  • QUALITY ASSURANCE

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DEPARTMENT NONCONFORMANCE REPORT ORIGML

-i o 1 ITEM LOCATION IS' L" W dCIL Ma'9" N # c'L 2 ITEN DRAWING /Mitf-110.

3 ITEM PART NA E 4, ITEN SERIAL NO.

m 633 sh ) bdl PIPE S90DLRLM-l-9 LIWim-9 m(L-o1-91 5 ITEM DESCRIPTION i

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\\lEuhDR WEth C. oM E" PIPE Spool' S 633-1-9 6 ITEM STARTUP SYSTEM NO.

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10 O'A OA 0A GRTidMEl L [VEOh0Rh RESPORS:5LE ORGANIZA ION 11 NONC0flFORNAICE DISCOVEPID DURIllG:

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" " " " " " " " ' ' %" PIPE SftOL S 63&-l-9 PART QP LINE eELB AT VENbOR WELO C NAS // W444 7 NEWNESS of'.8bB Aph.890. AREA of Vro///mN'IS og TNE tstRECT. LV IO TRE CEA)TER (1dITEDMb(PERSON)~ '

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j 22 POTENTIAL SO.55(e) 24 ACTICII ITEM NO.

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30 PNOCESS CORAECTIVE ACTION

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~0 ATE 35 DISPOSITICN ACTION TAKIN RECEIVED DEC 0 81983 Midland Project M 36 NETH00 0F DISPOSITION ACTION VERIFICATION 37 K R CLOSED ST RESULT OF DISPOSITION ACTION VERIFICATION IF UNACCEPTABLE, REFERENCE PERCGIM RCR MER O ACCEPiastE O UNACCEPTABLE MPQAD DATE A.N.I. (ASME)

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, QUALITY ASSURANCE DATE ISSUED REV COPY DEPARMENT NONCONFO RT CONTI ATION SHEET g

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RECORD Copy ULTRASONIC THICKNESS MEASUREMENT TEST REPO g

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OORESS P.O. Box 2167 Midland, MI 48640 GEO 6843 J31 p 7 b8 OR PROJECT LOCATaON P O. NO.

PLAN OR OWG. NO.

Midland Nuclear Power Project 7220.FSC.206 m 632-l YSTEM TYPE OF MATERIAL ACCEPT ANCE ST ANDARO N.D.

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Priority: k Trend Code: K-9 SU/S: ABA & ABB, 1&2 AIg 3157h ly=

SAFETY CONCERN ANv

"#?t'#2'ot".' l 2

-REPORTABILITY EVALUATION ~"[7*' """"

k.

HOW WAS CONCERN IDENTIr m, WHEN, WHERE?

"O MANAGER-MPQA Thursday, June 10, 1982 during MPQAD DQAE audit

1. FROX:

SMehta of Mechanical Design Calculations, Audit No M01-212-2.

ORGEI:'ATIO' :

DQAE J

SCPI NO:

53 j

FII2 NO: 15.1 i

DATI FICEIVED:

6/17/82

2. !S CONCERI! A PART al?

YES Q NO WHEN?

BY WHOM?

3. IS NRC AWARE OF THIS?

YES M NO (CONTINUE ON NEXT PAGE)

B OM?

5 BRIEF DESCRIPTION OF CONCERN - SYSTEM, COMP 0ar.ar, ACTIV!"Y, POSSIBLE SAFETY IMPACT -

( ATTACE SUPPORTING DOCLHENTS).

Calculation FM-5003-il(Q) Rev 5 for the determination of minimum vall thickness requirements of Piping Class ELB utilizes material with allowable stress of 17,500 psi.

Piping Class Sheet ELB specifies fittings for which the allowable stress is 15,000 psi.

No calculation was performed to show the adequacy of the fittings for the intended use.

There is a concern that the specified fittings may not be suitable for this design.

Evaluate safety l= pact, if any.

Also review other Bechtel calculations of this type to see if similar problems have occurred.

(CONTINUE ON NEXT PAGE) 6.

IMMEDIATE REPORTABILITY EVALUATION:

7.

ORGANIZATION REFONSIBLE FOR FURTHER

a. O REPORTABLE

- GO TO 13 EVALUATION:

b. O POTETRY REPORTABLE - GO TO 13 Bechtel Proj ect Engineering
c. u NOT REPORTABLE, FURTHER EVALUATION 8.

FINAL REPORTABILITY EVALUATION d.

NOT REPORTABLE (IF 6.c. CHICKID):

    • C REPORTABLE
b. R NOT REPORTABLE

'9 QA APPROVAL OF E7ALUATION

/

OF BLOCKS 1 TO 7:

M c

6/23/82 MANAGER -

DATE l

10.

JUSTIFICATION OF EVALUATION - (ATTACH SUPPORTING DOCUkr.arS)

It is currently felt that minimum wall thickness specified has been exceeded by the manufacturer.

Bechtel is reviewing the Material Specification to determine whethe) this is an actual problem or just a paper problem, frcm a safety standpoint.

(CONTINUE ON NEXT PAGE) 11.

VALUATO 'S TURE/DATE:

12. FINAL QA APPROVAL - MANAGER MPQA/DATE:

Md Gks/72--

13. NRC NOTIFICATION: HC@

DATE:

TIME:

E INDIVIDVA T30TIFIED-

m oAFETY CONCERN ANv-PROJECTS ENGINEER 1HG ano co muctio -

g OUAUTY ASSURANCE DEPARTMENr

=

-REPORTABILITY EVALUATION g;NO:

53 QA70-0 k.

CONTINUED 5

CONTINUED 10.

CONTINUED 1

l I

1k. MINIMUM DISTRIBUTION:

15 ADDITIONAL DISTRIBUTION:

VICE PRESIDENT - PE&C LHCurtis RCBauman VICE PPESIDENT - MIDLAND PROJECT EMHughes DTPerry DIRECTOR - ENVIRONMENTAL SERVICES & QA BPKenonetz JEBrunner MIDLAND SITE MANAGER RCHollar MADietrich SITE QA SUPERINTENDENT TGBallveg GREagle MANAGER - SAFETY & LICENSING u 6ers NCole MIDLAND FILE NO 15,g

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1 To E.M. Hughes Date Midland Plantlinits 1 and 2 From T.G. Ballweg sg Bechtel Job 7220 MAIN STEAM LINE FITTING MATERIAL of Mechanical Engineering SCRE 53 SAFETY EVALUATION

/

Copies to Copy Distribution At Ann Arbor File M-104 PR w/a Refere es:

EBC 1,

0/26/8'2 91416)

BCBE 6702

/23/82 (Com 99446) j051, 4'/28/83 (com 114036)

This is to advise you of a potential safety concern with the wall thickness calculations for several classes of carbon steel nuclear j

se: vice piping 26-inches and larger in use at the Midland plant.

Nuclear service piping is piping designed to the requirements of Section III of the ASME Boiler and Pressure Vessel Code.

In addition, this memorandum documents the safety-related basis that l

should be used in conjanction with a significancy analysis, to be done by others, to determine whether this condition is reportable l

under the criteria contained in 10 CFR 50.55(e).

This concern has t

been identified by Consumers Power Company as Safety Concern and Reportability Evaluation (SCRE) 53.

Potential Safety Concern A review of the piping class sheets, Drawing 7220-N-481(Q),

Revision 20, indicates that for many carbon steel nuclear service piping classes in sizes 26-inches and larger, the material specified for fittings may be of lower strength (allowable stress) than the material specified for the pipe. For carbon steel nuclear service l

piping in sizes 24-inches and smaller, and for all sizes of l

stainless steel nuclear service piping, the fittings specified have l

an allowable stress equal to or greater than that of the specified pipe. The pressure design wall thickness calculations, performed as required by ASME III 1971 S73 NB, NC, ND 3641, were based on the allowable stress of the pipe. Therefore, the calculated required l

vall thickness for pressure design for the pipe could result in j

overstress of the fittings for those cases where the fittings are of a material with lower allowable stress than the pipe, i

The 26-inch and larger pipe and fitting asterials specified for carbon steel nuclear pipe classes, along with pressure design calculation and allowable stress information, are tabulated on the attached list.

From the list it can be seen that the ELB pipe class is the only one which requires further consideration.

The lines l

affected are the main steam lines inside containment from the steam i

generator nozzles up to the containment penetration flued heads.

O f

l

i IOM to M. Hughes Page 2 h lines are identified as lELB-9, -10, -11, and 12 and 2ELB-9,

-10, -11, and -12.

The nominal sizes of these lines are 26-inches and 36-inches. N ELB lines outside containment are not of concern because of their 2-3/8-inch na=f a=1 vall thickness, specified to meet no-break and relief valve thrust requirements.

Safety Evaluation Calculation FM-5003-11(Q), Rev o' 6 esta siishes the following minimum wall thickness requi enents,for 26 inches and 36-inches ELB j

asin steam pipi

/

)

lowable Str se f

Siz \\ / 15\\C 00 psi \\

16,200 psi 17,500 psi l

C r

26" O

D49 0.885 0.825 36" 1.289 1.201 1.118 i

f i

h wall thicknesses shown above are the minimum requirements for j

adeqtiate thickness for the different materials used.

The piping l

(pipe and fittings) was fabricited by ITT Grinnell under Purchase order 7220-M104A(Q) to minimum wall thickness requirements of f

0.935-inch for the 26-inch size and 1.267-inch for the 36-inch size, l

based on Revision 9 of the Piping Class Sheets 7220-N-481(Q). he,

j for all except the 15,000 psi material, the wall thickness will be t

adequate.

7 i

A program of measurement of the thickness at butt welds on the main f

steam lines inside containment has been initiated (Reference A).

h butt velds are being asasured because the counterbore at the l

weld and preparation (reference Drawing 7220-1F473) makes this the thinnest part of the installed piping system.

If adequate thickness exists at the welds, the remainder of the fitting will be acceptable as well. h test thickness requirements have been adjusted upward l

co reflect a 1% tolerance in the testing procedure (reference i

IP-UT-452 in accordance with ASME V, Article 5, Paragraph T-55, j

1974576). This adjustaant establishes the following minimum test l

requirements:

Allowable Stress l

Sise 15,000 poi 16,200 psi 17,500 psi 26" 0.959 0.894 0.834 l

36" 1.303 1.214 1.130 I

r l-i IOM to M. Hughes 1

Page 3 Eighty-six welds out of approximately 160 have been measured.

Measuremects taken to date (References B and C) indicate adequate vall thickness except for the following welds, where the thickness 4

at a point in the circumference is below the minimum:

l P&ID M-632, Sheet 1 3-9 and 10) zimua Average Nogative Variance j

Wald

oint, V triance (Alona Lenath) m

[

}[

L j

B

..005"

+.061" l

/

C

.096"

+.003" B

.023"

+.133" B

.010"

+.088" l

FP A

.025"

+.030" FF C

.037"

+.039" l

GG B

.005"

+.047" l

II B

.033"

+.038"

  • II D

.026"

+.034" SS C

?

.043"

+.097" t

EKE A

.023"

+.091"

[

3 3

.004"

+.056"

[

10 A

.002"

+.046" j

16(2ELB-9)

C

.010"

+.063" j

r Note that the average variance along the pipe axis at each I

circumferential point is positive.

The program of asasurement will be continued to assure that adequate l

wall thickness exists throughout the main stesa piping inside j

containment. All areas which do not have adequate well thickness will be builtup as required to meet the appropriate thickness.

I i

Based on the counterbore dimensions, the pipe'outside diameter, and l

the applicable tolerances, the pipe hoop stress will be 17,500 psi at the counterbore when operating at the design pressure of l

1050 peig. This represents 117% of the allowable stress for 15,000

(

poi material.

Similarly, when operating at the maximum pressure of l

1155 peig, the hoop stress is 20,000 psi, 133% of the allowable i

stress.

Because the minimum yield strength of this asterial is 32,000 pai, this would not be expected to cause failure of the pipe in service. The stress analysis of these lines has been reviewed.

[

In no case is the longitudinal stress in the fittings greater than i

che 15,000 psi allowable stress.

i i

f f

l

t L

IOM to ".M.

Hughes Page 4 The case in question is a combination of stresses in perpendicular planes, hoop, and longitudinal. Torsional stresses have been considered negligible. Mathematical stress analys fi shows that under these conditions there is no point in the By under greater stress than the greater of the two stresses.

inua stress at any given point in the main steam line pipes, n, is 20,000 psi.

Conclusion Who o tting at a de g rating of 1050 psig, portions of the 26-inch and 36-1 a stiana pi i inside containment may be slightly stressed bey AS I allhrables for pressure hoop stress.

It would not be l

3 expe ed t harvice, because the yield strength of the material is ao e a ouble the allowable stress. Measurements at the jobsite may cate that veld buildup is required to meet ASME III requirements, but the safe operation of the Midland plant would not be compromised.by l

this condition.

Prgpared by:

k#

T.G. Ballwed Mechanical Group Supervisor j

A R.F. Tulloch W

Plant Design Group Supervisor i

Concurrence by:

47 Y eM f

D.F. Lewis j

Assistant Project Engineer I

l i

M.T. Fravel Chief Mechanical Engineer I

l R.L. Loos f

Chief Nuclear Engineer

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Bechtel Power Corporation i

Post Office Box 2167 i

Midland. Michigan 48640 April 14, 1983 Consumers Power Company 1945 West Parnall Road Jackson, MI 49201 Attention:

W.R. Bird i

Job 7220 Midland Project SCRE 53 AI S-1574 PARTIM., RESPONSE MAD-2249

Dear Mr. Bird:

The following is Project Engineering's partial response to the subject l

SCRE.

Comments on the draft safety evaluation for the subject SCRE 53 have l

been received and are being incorporated into the document.

A re-

~

forecast date for further response is set for 5/4/83.

If you have any questions regarding the above, please contact Al Bock at Ext. 7649 of Quality Engineering.

Very truly yours, pl Marion A. Dietrich Project Quality Assurance l

Engineer i

+

MAD /lep j

CC:

D.B. Miller (Site)

['

R.A. Wells (Site)

I' Mg I

J.-. Wood (Jackson)

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Bechtel Power Corporation Post Othee Box 2167 Midland. Michigan 48640 March 12,1983 t

Consumers Power Company 1945 West Parnall Road l

49201 Jackson, MI W.R. Bird Attention:

Job 7220 Midland Project SCRE 53 AI S-1574 PARTIAL RESPONSE MAD-2227

Dear Mr. Bird :

i l response to the subject The following is Project Engineering's part a SCRE.

the subject SCRE have been Comments on the draf t safety evaluation for A reforecast the document.

received and are being incorporated into date for further response is 4/7/83.

lease contact Al Bock, If you have any questions regarding the above, p QE, at extension 7649.

Very truly yours, e

i f

Marion A. Dietrich Project Quality Assurance y

Engineer

,j MAD /lep D.B. Miller (Site)

CC:

R.A. Wells (Site)

J.L. Wood (Jackson) fu; La t!M 16 %

mal.lTY ASi.G"CE

Em

.c._

Bechtel Power Corporation Post Office Box 2167 Midland. Michigan 48640 February 16, 1983 Consumers Power Company 1945 West Parnall Road Jackson, MI 49201 Attention:

W.R. Bird Job 722Q Midland Project SCRE*S3 RI: S-1574 PARTI & RESPONSE MAD 2215

Dear Mr. Bird:

'Ihis is a Project Engineering partial response.

Presently, the draft of tne Safety Evaluati:n for the subject SCRE 53 is in the coordinati.ca cycle. Finalization of this Safety Evaluation is anticipated to be complete by 2/20/83. Tlvarefore, the forecast date-for further response is 2/28/83.

If further assistance 'and/or clarification is necessary, please ' ontact c

Al Bock at Ext. 7649 of the Ann Arbor office, Quality Engineering.

J Marion A. Dietrich Project Quality Assurance Engineer MAD /lcp CC:

D.B. N ller (Site)

R.A. Wells (M9QAD)

M J.L. Wood

{ Jackson) t c,

, wwy e

r c a so u n:.

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..,,,,, i _

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FEB171983

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inu S.o FIELD QUAI.lTY A.h0RANCE r&T5dS SENT AS ADDRESSED l MIDLAND, MICHIGAN

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Bechtel Power Corporation Post Office Box 2167 Micland. Michigan 48640 December 16, 1982

~

?

Consumers Power Company 1945 West Parnall Road l

Jackson, MI 49201 Attention:

W.R. Bird Job 7220 Midland Project PIPING CLASS ELB FITTINGS PARTIAL RESPONSE SCRE 53 MAD-2190

Dear Mr. Bird:

Enclosed is Project Engineering's partial response to the concern documented in Consumers Power Company's Safety Concern and Reportability Evaluation No. 53.

If you have any questions concerning the above,, please contact this office.

Vect truly yours, Marion A. Dietrich Project O.lality Assurance Engineer MAD /lcp IOM E.M. Hughes to M. Dietrich dated December 7, 1982 Enc:

Com 096922 cc:

D.B. Miller (Site) w/o R.A. Wells (Site) w/a J.L. Wood (JSC) w/o 7,3 c.c. ---- --

',.;!*'C....MT@f..k}.

1

.f~

.; 6 e:a

/

.'..w.--,.. +.c ' t c;.

al:n;!.rv :r-m,u:b.c r

lI

..I i;.'.k n e;. I C

Becr:6. Asscaams Professior.a! Corocraaor Inter-off;;e Mercrancum

k. Tietirich.:

't'

re December 7, 1982 To Midland Plant Units 1 and 2 5 om E.M. Hughes suoiect Bechtel Job 7220 SCRE 53 Al S-1574 c

Engineering Safety Evaluation

^

cooin t T.G. Ballweg (All W/A)

A. Bock R.C. Hollar This is a project engineering partial response.

The field has been requested to measure all butt welds in the 26 inch and 36 inch main steam lines.

The field is proceeding to take these wall thickness measurements, but no response has been received as of this date.

Therefore, a reforecast date for further response is set as 12-30-82.

If further assistance and/or clarification.is necessary, please contact Al Bock at extension 7649 of Quality Engineering.

E.M. Hughes

)

Ann Arbor Project Engineer 1

1

Attachment:

Inspection Request Teletype.

19...

re N:

p". '* %3*-

y yt,0s '*i

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Partially Closes Com 075636 g..._

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Bechtel Power Corporation Post Office Box 2167 Mictand. Mich:gan 48640 October 28, 1982 Censumers Power Company 1945 West Parnall Road Jackson, MI 49201 Attention:

W.R. Bird Job 7220 Midland Project PIPING CLASS ELB FITTINGS SCRE 53 PARTIAL RESPONSE MAD-2166

Dear Mr. Bird:

Enc'.osed is Project Engineering's partial response regarding the concern documented on Consumers Power Company's Safety Concern and Reportability Evaluation No. 53.

If you have further questions concarning the above, please contact me at Ext. 207/382.

Very truly yours, lon A. Dietrich Project Quality Assurance Engineer MAD /lcp Enc:

SCRE 53 - Partial Response cc:

B.W. Marguglio (JSC) w/a D.B. Miller (Site) w/o l

J.L. Wood (JSC) w/o L

NOVs ;ggg W ASSURANCE

g I.

n,f

..,x :. m.: m.'

[.

_% m,e.,,!

m.. e _: '." "

)

_ m

=_

LIi c =. m s= m :t mmn

_. B I..._ Y t VA L U A__i 10 N ntrun m a u n...

/ a ti 3 6 TO MANAGER-MPQA

,3: xxS C=;:ER:; IpD:TIrIEa,.=.EN, VzIRE?

Thursday, June 10, 1982 during M?QAD DQAE audit

1. ??.0M -

SMehta of Mechanical Design Calculations, Audit No M01-212-2.

ORGA2:I** e' IO:i:

DOAE S

ISCRI NO:

53 FILE NO: 15.1 To : a g m ~ m FROM:

E.M. HUGHES UAII IICEIYED:

b/17/02

2. IS C'AiCER*: A PART 217 Q YE3 Q UO 3Y VHOMa
3. IS NRC AWARE OF THIS?

O YES @ NO (CO:iTOiUI ON NEX'" PAGE)

., _m(,joM

37 BRI':F DESCRIPTION OF CONCERN - SYSTEM, COMPONDIT, ACTIVITY, POSSI3LE SA.?T!Y IM*ACT -

( ATTACE SU??ORTING DOCUMENTS).

Calculation FM-5003-ll(Q) Rev 5 for the deter =ination of =ini=u= va.11 thickness require =ents of Piping Class EL3 utilizes =aterial with allevable stress of 17,500 psi.

Piping Class Sheet m specifies fittings for which the allevable stress is 15,000 psi.

No calculation was perfor=ed to show tne adequacy of the fittings for the intended use.

There is a concern that the specified fittings =ay not be suitable for this design.

Evaluate safi:y i= pant, if any.

Also review other Bechtel calculations of this type to see if si=ilar proble=s hav-occurred.

(CCNTINUE ON ND"! PAGE) 110ZDIATI REPORTA3ILITY EVAIDATION:

7.

O?.GANIIATION RIPONSIBLE FOR J'URIEIR O REPORTABLE

- GO TO 13 EVAIDATION:

PO!E*TIALLY REPORTABLE - GO TO 13

~

Bechtel Proj ect Engineering 9 NOT REPOR*ABLE, FURTh9 EVALUATION 8.

FINAL Fl?ORTABILITY EVALUATION NOT R 20RTA3LE (IT 6.c. CHEC)~D):

PE=0RTA3LE

b. O NOT R=. =ORTA3tE QA APPROVAL OF EVALUATION

/

OF' 3LOCFS 1 TO 7:

M 6/23/82 MAliA G - - QA DATE JUSTIFICATION OF L'ALUATION - (ATTACE SUPPORTI2iG DOCU!CITS)

It is currently felt that cini=us vall thickness specified has been exceede?,-by the =anufacturer.

Bechtel is reviewing the Material Specificatien to deter =inf vtiethG; this is an actual problem or just a paper problem, fro = a safety standpoint.{_ }--'

SEE THE ATTACHED SHEET FOR A PARTIAL RESPONSE TO THE SUBJECT SCRE.

Reforecast date set as 11-19-82.

(CO:iTINUE ON NEXT PAGE)

VALUATO 'S

.."ATURE/DATE:

12. FINAL QA APPROVAL - MA? A.'3E9 MPQA/DATE:

k.

& b.S

[E-- -

NRC NOTIFICATION: H09'?

DATE:

TIME:

IFDIVIDUAL NOTIFA:

v.

.: 3

s e

u :.:.

This is Project Engineering's further partial response to the subject SCRE.

The field will be requested to measure all butt welds in the 26 inch and 36 inch main steam lines. Engineering will complete a calculatica to show the required wall thickness for all main steam piping at design and =aximum oper-ating conditions. The results of both of these actions will be evaluated and necessary corrective action, if any, will be defined.

Progress on this issue will be largely dependent on receipt of information from construction, therefore, a forecast date for further response is set as 11-19-82.

If further assistance and/or clarification is necessary, please contact Al Bock at extension 7649 of Quality Engineering.

)

bec:T.G.Ballweg E.M.Hughes A. Sock Ann Arbor Project Engineer R.C.Hollar 0-/6 92.

un=2L.gf j6.4 a

Les NE

...{

Recom Fm "p,f k'ritten Response Requested :NO cm:n a '

Com Use : Partially closes com 075636 t,

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CADS'dmPJS J POW 8f Campany General Offices: 1946 West Parnell Road, Jackson, MI 49201 * (517) 788-0550 June 21, 1982 1

S J.

Mr E M Hughes Bechtel Power Corporation PO Box 1000 Ann Arbor, MI h8106 MIDLAND PROJECT -

SCRE 53 FILE:

15.1 SERIAL:

17526 Attached is SCRE-53 cencerning allovable stress calculations for Piping Class ELB fittings for the deter =ination of =ini=um vall thickness require =ents.

Bechtel Project Engineering is requested to evaluate this SCRE under the criteria of 10CFR50 55(e) and to submit a for=al reco==endation to Consu=ers Power Company by July 17, 1982.

Y$h W R Bird Manager of Quality Assurance Midland Project WRB/1r CC: JWCook JARutgers BWMarguglio RCBauman DBMiller DTPerry MLCurland JEBrunner TJSullivan MADietrich LHCurtis,

GREagle BPKononetz BJCole ACTION PRINT I

I RCHollar TGBallveg INFO PRINTS h

ha$l MPOA ROUTING lE f

f

)@

MU47 TO FILE ORIG TO FILE Na O WW hoPY FOR l

l l

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