ML19254E329

Forwards Second Interim Deficiency Rept & Statement of Status of Action Re Itt Grinnell-supplied Main Feedwater Pipe Spools.Bechtel Associates Prof Corp Has Reviewed at Grinnell 70 Spool Data Packages.Related Correspondence

ML19254E329
Person / Time
Site:	Midland
Issue date:	08/01/1979
From:	Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19254E324	List: ML19254E323 ML19254E329
References
HOWE-215-79, NUDOCS 7910310455
Download: ML19254E329 (5)

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ELCD CCCTrr; ; :. . , -

W.S Consumers

- 1.jj,h POWBr 5-""-"

.- /2Company Sensar %ce r%essiens V

Generel cffices: 1945 West Pernell Road, Jackson, Michegan 49201 e (5171785-0453 August 1, 1979 Hove-215-79 a \\ i  %

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[(j ysnac Mr J G Keppler, Regional Directer f- .

Office of Inspecticn and Inforce=ent gy

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US liuclear Regulatory Cc==1ssion e.*.f,3

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799 Reesevelt Reed Glen Ellyn, IL 60137 4 y N

MIDLAIiD TUCLEAR PLA:iT UITIT !!O 1, ICCEIT :0 50-329 U: LIT IiO 2, DCCKE2 !l0 50-330 IMPACT TESTED - IT:' GRECM SU?? LIED MAI'i FIED ?I?E _

neference: S H Howell letter to J G Keppler; Midland fiueleer Plant; Qnit !!o 1, Decket :To 50-329; Unit ::c 2, Oceke :To 50-330;

!= pact Tested - IIT Grinnell Supplied Main Feed Pipe; The referenced letter and this letter are interi= 50 55(e) repercs en the status of Main Feed Pipe Spcols which have cuestienable i= pact test results.

Attach =ent (1) is Censumers ?cuer Cc=pany's statement cf the status of activitd.es asscciated with the spc01s ubich was derived frc= the referenced letter and frc= the additional basic data given in 3echtel's MCAR Interi:

Report, provided as Attach =ent (2)~.

Another reperc, either interi= cr final, vill be previded by Septe=ber 7, 1979

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Attachments: (1) Censumers ecver Cc pany's State:ent cf the Status cf Acticn As scciat'.d 'a'ith -"J2-G d -- =' ' Supplied Main Feedvater Pipe Spcols (2) MCAR-29, Interi: Repcrt :Io 2, dated July 26, 1979 T ' ~ a-a -

CC: Director of Cffice of nsrecticn 'c Att: Mr Victor Stelic, US:iRC (15) 3,

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q'4 2h7 Director, Cffice of Menage =ent Infomation and Prcgre: Centrcl, USIIRC (1)

~ s 7910310 M 5

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Attachevi.t to !;LC- 77/.2 Appendix

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• '.  !!CAlt 2') 1 Tir.r.lY IEPORT 2 .

• July 26, 1979 Page 6

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Code Acceptance Critetia for Charpy I= pact Results in Accordance with ASMF. Code,Section III,1971 Edition Through fiu==ce 1973 Addenda

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1) Acceptance tests consist cf a set of three full-site spec 1= ens.

2) Speci= ens shall have a =i21=== of 25 =il lateral expansion.

3) Receses (Su==er Addenda,1973)

One retest permitted at the same te=perature provided:

a) Average values of the test results =eet the =ini=== require =ents b) Not more than one speci=en per test is belcw the =i=i=u= require-

=ent c) Speci=en not =eeting the =ini=== require =ents is not lower than 10 f t/lbs or 5 d's lateral below specified require =ent

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d) A retest consists of two additio=al speci= ens take: as close as practical to the f ailed speci= ens. For acceptance of the

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retest, both speci= ens shall =eet the minicus require =ents.

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C.5depy Tes: Results

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Heat L-20479 .

. Spools Register . CKTR Heat-Trea:edl

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lELB15638134 MP44 . P142 Yes lEL315638136 MP46 P142 Yes 2EL315639135 MR418 P142 Yes

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2ELR2S639135 MR426 P142 Yes 2ELBS639136 MR427 P142 Yes

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Test RestL:s +30F

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As-Received Condition Stress-Relieved 11757

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1s: 2nd 1st Tes:

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32 31 30

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14 43 29 13 23 29 Passed .No No ,

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1. Ecat treat =ent verification was based on review of actual documen-tation at the j'chsico. Hea: treatment censisted of pos: weld stress ,rslieving.

In accordance with code regula: ions material, this heat is considered acceptable in the : ress-relieved condition. Ecwever, cecause of incen-sistent results wit' other hea:s af ter s:ress-relievin3, Grinnell considers

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these resul:s ques:icnable. Disposicion of this =a:erial is considered undete rined at :his ti=e.

Spools Consisting cf a Cc=binacien of Heats N-32762 and L-20479

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Secols Racister CMTR Hea:-Trea:ed

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IIL315633133 M?43 P142 Yes lEL325638133 M?412 P142 Yes lEL32S638136 MP414 ?142 Yes

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3ecause these spools are combinations of unacceptable hes:s , they are no:

acceptable.

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'APPCDIX -

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SU!C".ARY OF FI"D DOC'E;TATICN SURVrf FOR HF.CS N-32762 A:C L-20479 Charpy Tes: Resul:s

- Heat N-32762

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Socols Register CMTR Hea -Trasted-

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1EL325633134 MP412 P142 2EL315639133 MR416 P142 Yes 2EL315639133A MR416AX P142 Yes 2EL32S639133 !IR424 P142 Yes .

2EL325639134 HR425 P142 Yes

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Tes: Resul: @ '30F '

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As-Received Condition

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3rd 21 :25 29 40 18 30 45 32 Passed No 'No Yes

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1. Heat trea::ent verifica:icn was based en revieu of a::tal documen-tation at the j obst:e. Heac trea::en: censisted of pos: 'eeld s:ress-relieving.

2. This spool is currently on hold at Grinnell Shop.

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Because :he third :es: a: 3CF is cons'da-ad ' valid, d'spesition of na:crial is undeternined a: :his :ine. (See Code Acceptance Cri: aria for Charpy I= pac: Tes: Resul:s.)

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Bechtel Associates ProfessionalCorporation

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Attachment to 3LC-7942 MCAR 29 Interim Report 2 July 26, 1979 Page 3 Forecast Data for Investiestien and Cerrective Action The next interim report is scheduled for August 23, 1979.

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Submitted by: b e '

Approved by:, O /> "

Concurrence by: )

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Bechtel Associates ProfessionalCorporation

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Attach =ent to BLC-7942 MCAR 29 Interi= Report 2 July 26, 1979 Page 2

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Grinnell concedes that i:s rationale, as de=onstraced by the resul:s of Heat N-32762 is not 100% consistent, and as a result, it believes that other stress-relieved heats =ay also be suspec: in rela;'on to the repeatability of the i= pact properties en each piece of equ p-ment.

Grinnell has rationali:ed that because it did not ob:ain i= proved Charpy test resul:s for Heat N-32762 s:ress-relieving, Hea: L-20479 cannot be considered to have the desired i= pact properties (+307) .

2) In May 1979, Grinnell tested 'three sa=p7es of Heat N-32762. These sa=ples vere frc= a fabricated spool whi.ch censisted of a sersigh:

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piece of pipe which was hot-bent, air-cooled, and : hen full furnace stress-relieved. These sa=ples yielded resul:s of 9, 6, and 17 =11 lateral expansion. Because :he sa=ples were taken near the area of the bend, it was thought tha: they =ay have been frc= a heat-affected :ene (an area which had received an La:er=ediate heating and cooling cycle because of its proy d:y to the hac bend area).

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Grinnell has indica:ed that =easure=ent of the actual sa=ple loca:icn relative to the area which vas heated and bent, shows tha: 1: was not significantly heated during the bending cycle. Grir.nell is preparing a graph of the te=perature versus dis:ance to show wha these sa=ples would have been subj ect to during the bending cycle.

The graph will be used to deter =1;.e whether the sa=ples cculd have been affected by the bending operatica.

Grinnell concluded that because the sa=ples were far enough fren the furnace not to ha af f ected by 1:s hea:, :he poor resul.s are because of the =aterial inconsistency associated wi:h :his particular heat. .

3) Bech el has perfor=ed a docu=enta:icn survey a: the jobsi:e to identify all spools Charpy tes: cualified in hea: trea:=ent cendi:icn and to ccnfir= tha: those spools iden:ified were in f ac: hea:-

trea:ed. The resul:s cf this survey, as rela:ed :o Heats N-32762 and L-2047;, are abula:ed in the at ached appendix.

Bechtel is still pursuin; the accep;abill:7 of naterial associated with Hea:s N-32762 and 1-20479 as well as any spools wi:h ho: bend sections. Theref ore, :he repor:able condi:icn of the pipe re=ains

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uncertain a: this :1=c. ,

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Attach =ent 2

- Hove-215-79 Bechtel Associates Professional Corporation Attachnen to 3LC-7942 .

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SUBJECT:

MCAR 29 (issued 7/13/79) .

I= pact Testing of Main Feedwater Pipe INTERIM REPORT 1 DATE: July 26, 1979 PROJECT: Consu=ers Power Cc=pany Midland Plant Units 1 & 2 Bechtel Job 7220 Status of Corrective Action and Investies -ion The status of actions in progress for resolution of the subject MCAR is as follows.

1) Bechtel has reviewed, at Grinnell, 70 spool data packages for i= pact test preperties on certified =aterial test reports in the following size range: 14-inch, 18-inch, 26-inch, and 36-inch dia=e:er pipe. This review covered all =aterial requiring Charpy i= pact testing. This action was taken to deter =ine whether addi:icnal material, other :han tha: identified in MCAR 29, =et specifica ica and ASME See:icn III, Class 2 code require =ents.

The spools were f abricated frc= a total of 16 hea:s. Of these heats, two =aterial test repor:s for Heats N-32762 and L-20479 contained ques:ionable data. Hea: N-32762 was considered ques:icnable because Grinnell perfor=ed = ore than one re:est, which is not allowed by ASME See:ica III, Class 2 code.

Grinnell has agreed tha: the original Charpy tes: resul:s ('30F) sub=1::ed for Heat N-32762 are not valid under ASME III, Class 2 require =ents in :he as-received condition. Grinnell had perfer=ed a Ch::py tes: (+30") f er the =a:erial of :his heat in :he s:ress-relieved condi:1cn but 1: had failed.

Grinnell was reques:ed to furnish 1:s rationale for accep:ance of the i= pac: :es resul:s en Hea: L-20479 in :he s:ress-relieved condition. Grinnell's rationale was based en 1:s e:gerience tha:

a suberitical (1100-1200F) hea: :: cat =en: has :he effec: cf reducing the spread of :cughness values (s= aller variances) and sligh:17 i= proving la:aral expansien values :hrough a sof:ening =cchanis= (a slightly reduced yicid pein:). The re:es: of Hea: L-20479, a::c:

stress- clieving, =c: the code i= pac: test requirc=en:s. Ecwever, t9 / 977

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Attach =ent 1

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k. A= investigatien is being =ade to identi.^f piping speels, fr =

heats other than "-32762 and L-2%79, which were het ben; and stress-relieved.

This attach =ent a*te= pts to present the rav data presen'.17 available and is not =eant to offe - any conclusiens at this ti=e.

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. Attach =ent 1 Page 2 yove.<,

.. -; ir 5 One spool of =sterial fre= this heat later required het bending and was subsequently stress-relieved. Charpy-inpact speci= ens obtained frt: this s;cci were 6, 9, and 17 ils lateral expansien, which is unac.M':able.

3. Heat L-20h*C

1. An initial set Of Charpy i= pact speci= ens were tested to the sa=e ASMI acceptance criteria given in A.2. '"he test results vere 13, lh and 32 =ils lateral expansica and the test was unacceptable.

2. 3ased on the test results of 3.1 and the criteria give: in A.3, no retest should have been allovec because the Original specimens failed to meet all three criteria needed to allev a retest. 1r

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perfor=ed a s cend Charpy inpact test (with three speci= ens si=ilar to an initial tes: versus tvc speci= ens required in a retest). ~he results of the second set of tests were 23, 31 and h3 =ils lateral expansien a.id this test was also unacceptable.

3 This heat was subsequently stress-relieve:i to i=preve fracture properties of the as-relled =aterial and retested with a new set of three Charpy i= pact speci= ens. S e test results after stress-relieving vere 29, 29 and 30 mils lateral expansion. '"hese test results vere abcve the =ini=u require =ent and the heat was then

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considered acceptable in the stress-relieve:i condition.

h. The results of the post stress relief tests describe:i in A.5 indicates that stress-relieving : ices ct always i=preve the Charpy i=;act results. Because of this, IT Grinnell no lenger believes that =aterial stress-relieved and tested ;er 3.3 can be considered acceptable.

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C. Other pire Srecis With E 3ent Secti:ns Because of the unacceptable results obtained frc= het bent and stress-relieved speel described in A.5, the acceptability Of all other specis which were het bent an:1 stress-relieved is being investigated.

D. Status of 'dentificatier of "sterial Under I-vestin-icn

'-- '-- 32762 hate been

1. Five piping speels with =st de' ae.. a.. .o.u

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2. Five piping speels with :sterial f.-c= heat 1-2Ch79 have been a.de . a..o

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N-32762 r.d 1-2CL79 have been identified.

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OF "'EE S**A"'US OF AC"' 0N ASSOCIA"."fD VI~H ITT-GRI'UElL SUPPL:ID MAIN FIENA"'IR FI?E SPCOLS The purpcse of this attachment is to provide a s==ary of the sequence of events that are associated with each of the heats of piping.specis. '"his data is taken frc= Attach =ent No 2 and Censu=ers Fever Cc=pany's pre.'iously referenced letter.

A. Rest N-?2762

1. One set of - py i= pact speci= ens were taken, but vere .::

valid because they were obtained "rc= an incerrect 10 cati:n.

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2. The "irst set of valid test specimens vere cbtained. For the material under censideratien, the ASMI acceptance criteria required three full-sized speci= ens be tested and that each speci=en have a =ini=u= test result of.25 =ils lateral expansien.

"'he test results ver; 21, h0 and h5 " s lateral expansien (a*. the required +20*? te=perature) and the test was unacceptable.

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3 The ASMI Code all:vs ene retest at the sa=e test te=peratu:e

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b. not =cre tha: One of the criginal spe:i= ens was belev the

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• 20C: JL3ccen, M-1035A y,c<nrgm ilo, esc-220A RC3at=an, P1h h12 DE:1111er, 211d13 d VRElrd, JSC-2163 W,P.oring, 3echtel AA -

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