ML19329E552

Interim Deficiency Rept Re Cracked Weld Between Personnel Lock Stiffener & Welding Ring.Proposed Repair Procedure Being Evaluated.Bechtel Corp 780630 Interim Deficiency Rept Encl

ML19329E552
Person / Time
Site:	Midland
Issue date:	08/04/1978
From:	Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
References
HOWE-137-78, NUDOCS 8006160345
Download: ML19329E552 (10)

Text

{{#Wiki_filter:.- u ) Power @, Consumers Company n 1"1"- " w oeneret Offices: 1945 West Parnall Road, Jackson, Michigan 49201

• Area Code 517 788 0453 r

August h, 1978 i' Howe-137-78 1J Mr J G Keppler, Regional Director y Office of Inspection and Enforcement lj Region III

5 US Nuclear Regulatory Com=ission 799 Roosevelt Road Glen Ellyn, IL 60137 MIDLAND NUCLEAR PLANf -

UNIT NO 1, DOCITf NO 50-329 UNIT UO 2, DOCKET NO 50-330 COIEAIINENT BUILDING PERSONNEL AIR IDCKS

Reference:

S H Howell letters to J G Keppler, Midland Nuclear Plant - Unit No 1, Docket No 50-329; Unit No 2, Docket No 50-330; Containment Building Personnel Air Locks -

1) Serial Hove-22-78, dated March 3,1978

2) Serial Hove-58-78, dated April 19, 19T8

3) Serial Hove-86-78, dated May 26, 1978

4) Serial Hove-106-78, dated June 30, 1978 The referenced letters and this letter are interim 50 55(e) reports. The enclosure provides the status of corrective actions as of July 6,1978.

Consumers Power Company is presently evaluating the proposed repair procedure for the eight cracked welds. "Laterim Report No 5 to MCAR-20 (-attachment to Reference 4) indicated that Bechtel QC was to reinspect to determine the extent of the undersized welds. In lieu of that, reinspection of fillet velds on personnel locks installed at the Midland job site was performed by a team consisting of: Dick Bair, , Bechtel Engineer (AAO); Ed Harwart, Manager of QA for W J Woolley Company; , Larry Morris, Bechtel Engineer (job site); Charles A O'Deay, W J Woolley QA En6 neer; Don Walls, Bechtel Field SQR. W J Woolley's detailed drawings, i approved by Bechtel Engineering, were used as a reference. A Cambridge veld gauge was used to perform the veld inspection. The inspection was performed on June 12, 1978. J Inspection of accessible 1/2" fillet velds on the bulkhead and doors of personnel locks verified that approximately 10% of the fillet velds inspected vere between i 1/16"-1/8" undersize,themajoritybeing1/16" undersize. Also, inspection of 1/2" fillet velds revealed oversize velding in approximately 10% of the veld 6 8006160 3 9'S f g

1 -2 Howa-137-78 Oversize velds were found to be mostly 1/16" over with infrequent cases areas. up to 1/8" oversize. W J Woolley Company is evaluating the information on undersize velds with respect to the effect on stress reports. Bechtel Engineering is assuring that the W J Woolley Company evaluation includes the assumption that the undersize conditions are present on all velds and not only on those which were verified because they were accessible for inspection. A report is scheduled to be submitted to Bechtel Engineering by August 11, 1978. Another report, either interim or final, will be sent on or before September 29, 1978. $YNY / / 2

Enclosure:

Letter, P A Martinez (Bechtel Power Corporation) to G S Keeley (Consumers Power Company), MCAR-20 Interim Report 6, BLC-6207, dated July 6,1978; with MCAR-20 Interim Report 6 dated June. 30, 1978 as an attachment. CC: Director, Office of Inspection & Enforcement Att: Mr John G Davis, Acting Director, USNRC (15) Director, Office of Management Infonnation and Program Control, USNRC (1) 9 e g l i i 1 )

4 artu f. REGULATORY INFORt1ATION DISTRICUTION SYSll'M (RID j DISTRIDUTION FOR INCOMING MATERIAL O-330 l LEC: KEPPLEN J G ORG: HOWELL S H DOCDATE: 08/04/78 NRC CONSUMERS PWR DATE RCVD: 08/10/78 {0CTYPE: LETTER NOTARIZED: NO COPIES RECEIVED UBJECT: LTR 1 ENCL 15 g (ORWARDING STATUS OF CORRECTIVE ACTIONS RE CONSTRUCTION DEFICIENCY INTERIM [EPT NO 5 TO MCAR-20 CONCERNING CONTAINMENT BLDG PERSONNEL AIR LOCKS. W/ATT SONSTRUCTION DEFICIENCY REPT AND SUPPORTING INFO.

1. LANT NAME: MIDLAND - UNIT 1 REVIEWER INITIAL:

XJM MIDLAND - UNIT 2 DISTRIBUTER INITIAL: A paco *oo********** DISTRIBUTION OF THIS MATERIAL,IS AS FOLLOWS ****************** CONSTRUCTION DEFICIENCY REPORT (IOCFR50.55E) (DISTRIDUTION CODE E019) FOR ACTION: ASST DIR VASSALLO**W/ ENCL BR CHIEF LWR #4 BC**W/ ENCL PROJ MGR HOOD **W/ ENCL LIC ASST LWR #4 LA**W/ ENCL 6 kLF_**W/ ENC b INTERNAL: NRC PDR**W/ ENCL I ' E_ ..usz ENCL OELD**W/ ENCL GOSSICK & STAFF **W/ ENCL MIPC**W/ ENCL DIRECTOR DPM**W/ ENCL DEPUTY DIR DPM**W/ ENCL QAB**W/ ENCL DIRECTOR DSS **W/ ENCL AD FOR ENG**W/ ENCL AD FOR REAC SFTY**W/ ENCL AD FOR PLANT SYSTEMS **W/ ENCL AD FOR SYS & PROJ**W/ ENCL SD**W/ ENCL K GEYFRIT/IE**W/ ENCL FERD DREHER/IE**W/ ENCL EXTERNAL: LPDR'S MIDLAND, min *W/ ENCL TERA **W/ ENCL i NSIC**W/ ENCL l ACRS CAT A**W/16 ENCL j I ?Ii! f DISTRIBUTION: LTR 41 ENCL 41 CONTROL NBR: _792290006 fIZE: 2P+1P+6P jg _ hoooooo**************************** THE END t 25 ff I t I E

Enclosure to Hove-137-78 Bechtel Power Corporation 777 East Eisenhower Parkway Ann Arbor, Michigan i u.,, Addrus P.O. Box 1000. Ann A;bor. Michigan 48106 r July 6, 1978 v.W,, hWA t / BLC-6207 4 it W Consumers Power Company g 7 IO/8 1945 West Parnall Road Jackson, Michigan 49201 . fl E dMf,'M-{.y

• ATTN:

Mr. G. S. Keeley Project Manager Midland Units 1 and 2 Consumers Power Company Bechtel Job 7220 MCAR-20 INTERIll REPORT 6 Files 2417/2801

Dear Mr. Keeley:

Attached Interim Report 6 of MCAR-20 is for your information and use. The inspec-tion of the personnel locks undersized welds has been completed and the analysis by W. J. Woolley to determine the safety ircplications is in process. The docu-mentation for the personnel locks is currently being re-examined by the supplier quality representative. Repair procedure (agreement) No. 7220-C50B-224 for the cracked welds of the per-sonnel locks has been approved by Project Engineering. The repair will be in ac-cordance with the repair procedure and specifications 7220-C-111(Q) and 7220-G-27(Q) and will be inspected by magnetic particle inspection. Since no significant information pertaining to the undersized welds will be avail-able until the analysis is completed by W. J. Woolley, Project Engineering suggests that this be the last interim report for MCAR-20 prior to the final report scheduled for September 15, 1978. Your concurrence in this matter is requested. Very truly yours, I'; W4 n P. A. Martinez PAM/SKC/pp Project Manager. Attachment.6 pages. cc: Mr. R. C. Bauman Mr. J. L. Corley Mr. W. R. Bird Mr. B. W. Marguglio i t d

'Attcchment to BLC-6207 p'.1 of 6 Bechtel Associates Professional Corporation

SUBJECT:

MCAR #20 (Issued 2/1/78) Cracked weld between stif fener and welding ring of personnel lock r INTERIH REPORT #6 ~ DATE: June 30, 1978 PROJECT: Consumers Power Company Midland Plant Units 1 & 2 Bechtel Job 7220 Introduction 'This report is submitted to advise of the interim status and course of action required pursuant to MCAR. #20 and NCR 1185. NCR 1185 was dispositioned by project engineering on June' 29, 1978. The final report will be issued when the evaluation for the undersize welds is completed. The final report is scheduled for September 15, 1978. C'ause The cause was discussed in Interim Report #5 dated June 19, 1978. Deficiency The extent of the undersized welds reported in Interim Report #5 are as shown in the attached sketches. Safety Implications The safet,y implications of the deficiencies discussed in-the preceding "interLa report are being analyzed by W.J. Woolley Company. On completion ~ of the analysis by Woolley, any safety implications will be discussed in the final report's. Corrective Action The documentation for the personnel locks is currently being reviewed by the supplier quality representative. The undersized welds have been documented during inspection and are under analysis by Woolley as reported . previously in this report. ^ The repair procedure for the deficiencies described in NCR 1185 has been completed by the W. J. Woolley Company. This procedure has been reviewed and approved by project engineering. The disposition of NCR 1185 specified that the cracked welds be repaired per this procedure and Specifications 7220-C-111(Q) and 7220-G-27(Q). The repair welds are also to be inspected by magnetic particle examination per Specification 7220-C-111(Q). te y-<

Attcchment to BLC-6207 -" * ?# ' Bechtel Associateu Professional Corporation MCAR #20 llEERIM REPORT 6, June 30, 1978, Pcge'2 This will be the last interim report for MCAR #20 because there vill be no significant information pertaining to the undersize velds available until the ' stress analysis is completed by the W. J. Woolley Company. The status and course of action required for the undersize welds will be i discussed in detail in the final report,' scheduled for September 15, 1978. 8 e 4 Submitted By:hM 12.Ypj Reviewed By: ~ A,,r-d,,; k +w~~~ Concurrence By RB/ cap 9 9 e G 6 oc 0 e e e e

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