ML19329E299

Interim Deficiency Rept Re Adequacy of Pipe Supports W/Undersize Fillet Welds.Itt Grinnell Revised QA & QC Procedure 02A006 Specifying No Undersize Tolerance Allowed on Welds.Final Rept 780331.Interim Repts MCAR-18 & 19 Encl

ML19329E299
Person / Time
Site:	Midland
Issue date:	02/10/1978
From:	Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML19329E300	List: ML19329E299
References
HOWE-11-78, NUDOCS 8006120604
Download: ML19329E299 (7)

Text

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, c consumers EM1 AID 7/ C .?!T REggpy power

('a@N Cordpany c.n.r., ome..: :n2 w..: uienig.n 4..no s.cm.on. usens a .n 4 20 . Area Cod.517788-0550 February 10, 1978 "' I x 7-Hove-ll-78 ,

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Mr J. G. Keppler Office of Inspection & Enforcement

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Region III u.s. go gg[ ,s US Huclear Regulatory Co==ission 799 Roosevelt Road

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G Glen Ellyn, IL 60137 '%;] g G-MIDLAND NUCLEAR PLAlfT -

UNIT NO. 1, DOCKET no. 50-329 UNIT HO. 2, DOCKET HO. 50-330 PIPE SUPPORT FILLET WLDS Reference 1) Letter, S. H. Howell to J. G. Keppler, Midland Nuclear Plant -

Unit No.1, Docket No. 50-329; Unit no. 2, Docket no. 50-330; Pipe Support Fillet Velds, Serial Hove-197-77, dated November 21, 1977

2) Letter, S. H. Howell to J. G. Keppler, Midland Kuclear Plant -

Unit No.1, Docket No. 50-329; Unit no. 2, Docket no. 50-330; Pipe Support Fillet Welds, Serial Hove-211+-77, dated December 22, 1977 The referenced letters were interim reports. This letter is also an interim report, since analysis and testing is continuing to provide a deter. ination of the adequacy of the pipe supports with the undersized velds. Attachment 1 and 2 provide Bechtel Associates' interim reports in response to the Manegement Corrective Action Reports (MCAR-1 Report No.18 and MCAR-1 Report No.19).

The following additional information was developed subsequent to the preparation of the attached interim reports.

1. Helmut Thielsch, Vice President of Research and Develop =ent, IIE Grinnell met with Consumers and Bechtel on January 25, 1978. At this meeting, he presented ITT Grinnell's plan for completing their effort to demonstrate the adequacy of the pipe supports. It was agreed to expand the testing program, which included additional configurations, to assure bracketing vorse possible existing conditions. Testing is e::pected to be ecmpleted and a draft report provided for Bechtel and Consumers Power Co=pany review.

by February 28, 1978.

2. ITT Grinnell agreed to revice their QA/Q,C Procedure 02A006 to specify that no undersize tolerance vill be allowed on fillet velds.

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, Howe-ll-T8 3 Several additional field velds were found to be up to 1/16 inch undersize.

4. Recent receipt inspections of pipe restraints supplied by ITT Grinnell have shown the hangers to have no nonconformances for undersized velds.

See Attachment 3 Another interim or final report vill be sent on or before March 31, 1978.

A w uwd Attachments: 1) Interim Report No. 3 dated January 20, 1978, MCAR-18

2) Interim Report No. 3 dated January 20, 1978, MCAR-19

3) Bechtel, Trend Rate Chart No. IA and 1B, ITT Grinnell M-106-AC (Hangers)

CC: c Dr Ernst Vol 6enau, USI.'RC (15)

Director, Office of Management Information and Program Control, USNRC (1) e ,,..w w w , -re-- - ,-nr-

. , Att chment 1  ;

-g Howa-ll-78 Page 1 of 1

SUBJECT:

MCAR # 18 (Issued 10-28-77 )

INTERIM REPORT #3 DATE: / -

7 O -7 3 ,

PROJECT: Consu=ers Power Company Midland Plant Units-l & 2 Bechtel Job 7220 Status of Corrective and Investigation To date, Bechtel has not received from Grinnell the requested program and approach for presenting their justification to the ASME code com-mittee and other jurisdictional authorities, as required by MCAR-18 Item 1.

Forecast Date on Corrective Action The interim reports will be issued on a 30 day basis until the final Grinnell report justifying their position for the deviation from the code is issued.- Completion of Grinnell program is expected in approx-imately 2 months. A final report will be issued at that time.

Submitted by: Gr <

Approved by: YI MCeud/d Concurrence by: ) h

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Attichment 2 Howe-11-78 Page 1 of 2

SUBJECT:

MCAR # 19 (Issued 11-7-77)

INTERIM REPORT # 3 DATE: / ~20 - 78 .

PROJECT: Consumers Power Company Midland Plant Units 1 & 2 Bechtel Job 7220 Status of Corrective Action and Investigation Grinnell submitted for approval their " Visual and Dimensional Acceptance Criteria for Welds" per their revised Quality Assurance / Quality Control Procedure 02A006 dated 12/8/77 to allow undersize / oversize tolerances on fillet welds. The undersize tolerances were not accepted. It is noted in the rejection of the undersize tolerance that, in' order to accept these or any other undersized weld tolerances, it will be necessary for ITT Grinnell to supply written confirmation from the appropriate ASME committee that such a criteria is consistent with the intent of the ASME B&PV Code,Section III, Div. 1, Subsection NF (1974), Paragraph NF-4222, and manda-tory Appendix XVII to this Code section, Subparagraph XVII-2452.1 and Table XVII-2452.1-1.

The oversize weld tolerances were accepted provided the actual weld size exceeds the minimum weld size specified by the appropriate code require-ments. The oversize weld tolerances as follows:

a) Nominal weld sizes up to and including 1/4", plus 1/8" tolerance b) Nominal weld sizes over 1/4" and up to and including 1/2",

Plus 3/16" tolerance c) All weld sizes over 1/2", plus 1/4" tolerance The other acceptance criteria provided in Grinnell's Visua'l and Dimensional

Acceptance Criteria for welds was found acceptable.

Grinnell issued a statement on 12/30/77 that the calculations for each of l

the 36 shop weld found undersized on the random 125 hangers inspected by ,

Bechtel field QA personnel were fou ,3 to be within the NF Code allowable .

stresses. All calculations were based on the smallest cross section of the welds.

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g es Att:chment 2 How2-11-78 Page 2 of 2 Crinnell is prepartur,a report that will include all detailed calculations along with an analysis of stresses to justify the acceptability of the undersized welds. This report is to be provided by Crinucil 1/26/78.

Forecast Date on Corrective Actig Crinnell's summary report continues to be expected by Bechtel within January. A final report would then follow.

Approved by: /M Concurrence by:t / -

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a -- 197C Two Week Period Ending Chart Nos. lA and 1B Performance Area 32, (site), " Supplier Control" .

ITT-Crinnell, M 1.06-AC Olanccrs)  ;

h As depicted in Chart No. I.h, there were a total of thirty (30)

"Q-Listed" ha6gers with welds that uere receipt inspected during tl}is reporting period. There ucre eight (8) during the first half of the period and 22 during the second half.

h None of these velds were found to be nonconforcing (c::cluding oversized welds) because of undersize or visually rejectable welds: ,

100% receipt inspection of t' he welds on hangers will continue until the

• final resolution of UCAR #19.and until assurance that the corrective action taken is effective. .

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REGULATORY INF .1ATION DISTRIBUTION SYSTEt RIDS)

. 'D'ISTRIBUTION FOR INCOMING MATERIAL 504$!k)b30 RECi KEPPLER J G ORG: HOWELL S H DOCDATE: 02/10/78 NRC CONSUMERS PWR DATE RCVD: 02/15/78 DOCTYPE: LETTER NOTARIZED: NO COPIES RECEIVED

SUBJECT:

LTR 1 ENCL 1 INTERIM REPT. CONCERNING PIPE SUPPORT FILLET WELDS AT THE SUPJECT FACILITY. W/ATT.

PLANT NAME: MIDLAND - UNIT 1 REVIEWER INITI AL: XRL MIDLAND - UNIT 2 DISTRIBUTER INITIAL

• • • o************* DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS ******************

CONSTRUCTION DEFICIENCY REPORT (10CFR50.55(E).

(DISTRIBUTION CODE BOO 4)

FOR ACTION: ASST DIR VASSALLO**LTR ONLY BR CHIEF VARGA**LTR ONLY PROJ MGR HOOD **LTR ONLY LIC ASST SERVICE **LTR ONLY INTERNAL: dFIL E**W /EBD NRC PDR**W/ ENCL I & E**W/2 ENCL OELD**LTR ONLY GOSSICK & STAFF **LTR ONLY MIPC**W/ ENCL BOYD**LTR ONLY DEYOUNG**W/ ENCL HELTEMES**W/ ENCL R. MATTSON**LTR ONLY KNIGHT **LTR ONLY ROSS**LTR ONLY TEDESCO**LTR ONLY EISENHUT**LTR ONLY

. STANDARDS DEV.**W/ ENCL K SEYFRIT/IE**W/ ENCL EXTERNAL: LPDR'S MIDLAND. MI**W/ ENCL TIC **W/ ENCL NSIC**W/ ENCL ACRS CAT A**W/16 LTRS DISTRIBUTION: LTR 40 ENCL 28 CONTROL NBR: 780520181 SIZE: 2P+1P+3P co********************************* THE END ****************************I O ghk h**

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