ML19329E575

Interim Deficiency Rept Re Containment Bldg Personnel Air Locks.Cracked Welds Ground Out & Gaps Mapped.Bechtel Corp 780501 & 28 Deficiency Repts Encl

ML19329E575
Person / Time
Site:	Midland
Issue date:	05/26/1978
From:	Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
References
HOWE-84-78, NUDOCS 8006160364
Download: ML19329E575 (5)

Text

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t CURSu m BIS i O} POWBf W.4 s,........,,

Voce Presodent C0mpany General Offices: 212 West Michigan Avenue, Jecuson, Michigan 49201. Area Code 517 780 0550 May 26, 1978 Hove-84-78

. THis DOCUMENT CONTAINS ,

b POOR QUAUTY PAGES d

x Mr J. G. Keppler Office of Inspection & Enforcement . -

Region III ,,

< e, US Nuclear Regulatory Con: mission 0; . , {

799 Roosevelt Road 3l _

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Glen Ellyn, IL 60137 o o r,

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MIDLAND NUCLEAR PLANT -

UNIT NO.1, DOCKET NO. 50-329 u, )

• 7f)[tf Op#.P UNIT NO. 2, DOCKEP NO. 50-330 CONTAIR E T BUILDING PERSONNEL AIR LOCKS gI Ik(Opf 7

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; Containment Building Personnel Air Locks, Hove-22-78, dated March 3, 1978.

2) 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; Containment Building Personnel Air Locks, Hove-58-78, dated April 19, 1978 The referenced letters and this letter are interim reports. Attachments 1 and 2 provide the status of the corrective action measures being taken.

Attachment 2 states that one veld originally (from visual inspection) thought to be cracked has now been shown to be sound. This veld is the veld marked with the double asterisk on Figure 2 of Attachment 2 of reference 1.

Another report, either interim or final, vill be sent on or before July 10, 1978.

N N Attachments: 1) Interim Report #3 for MCAR-20, dated May 1,1978, " Cracked WeM Between Stiffener and Welding Ring of Personnel Lock"

2) Letter, J. M. Klacking to W. R. Bird, MCAR-20 Status Report, HQA-78-107, dated May 23, 1978. .

S CC: Dr Ernst Volgenau, USNRC (15) -7&tSLFX+0*- D'z, 8006161)3CI I

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2 CC: Director, Office of Management Information and Program Control, USNRC (1)

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/REHEfmans Bo ulGFht@M Attachment 1 to i I Howe-84-78

> .,**, StiBJECT: HCAR #20 (Insued 2/1/78),

Cracked weld between stiffener and walding ring of personnel lock

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INTER 111 REPORT #3 DATE: 5/1/78 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 cction required pursuant to MCAR #20 and NCR,1185. -

All investigation completed at present has been based on the information from one of the nine cracked welds, which has been ground out. This report cannot be finalized until the gap information is available for all the cracked welds. The final report is rescheduled for June 15, 1978, for resolution of this problem. "

Deficiency The deficient welds have been discussed in Interim Report #1," dated~

February 17, 1978.

Safety Implications The safety implications have been discussed in Interim Report #2, dated March 31, 1978.

Corrective Action The documentation' package for the weld and weld test procedures used for the subject welds was received from W. J. Woolicy Company on April 26, 1978, and is currently under review. .

A revised weld repair procedure for the cracked fillet welds, climinating the requirements for post-weld heat treatment, was received from W. J.

Voolley Campany on April 20, 1978. Based on information presently availabla, the revised weld repair procedure has been reviewed and found cceeptable by Project Engineering. The letter forwarding this procedure includes W. J. Woolley Company's concurrence to grinding out the remaining 8 out of 9 total cracked welds.

Bechtel Construction is grinding out the remaining cracked welds and mapping the gap between the stiffener and the veld ring. A determination cs to the cause of the cracked fillet welds will be completed when the f grp information for all the cracked welds has been evaluated.

S bmitted by A6 d Approved by N/Y'/[{[dt%Q Ji .

Concurrence by An( . nu BECHTELASSOCIATESPROF/SSIONALCORPORATION RB/ cap ,

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V Att::chment 2 to

- ( Howe-84-78 Bechtel Power Corporation 777 East Eisenhower Parkway * -

Ann Atbor, Michigan ,

Afa#A M ess: P.O. Dox 1000. Ann Arbor, Michigan 48106 May 23, 1978 Mr. W. R. Bird COUSUbERS POUER COMPANY 1945 West Parnall Road Jackson, Michigan 49201 .

Midland Units 1 & 2 Consumers Pouer Company Bechtel Job 7220 MCAR-20 STATUS REPORT FILE: Q2100

Dear Mr. Bird:

This is to inform you of the progress of MCAR-20 since Interim Report f 3, dated May 1, 1978. All eight of the cracked welds have been ground out and their gaps have been mapped. Magnetic particle inspection was performed on the velds between the horizont'l rtiffeners and the veld ring, and none were found to be cracted. One of the horizontal stiffener velds which had been reported as cracked was found to be a cound weld when magnetic particle tested. On May 11, 1978, a letter was transmitted to W. J. Hoolley Co.

requesting the details of the splice plates at the two locations where the gap between the stiffener and the weld ring exceeds 3/8 inch.

C As scheduled, the final report for resolution of the problem is June 15, 1978.

Sincerely, l! ilE J. M. Klacking V [

e ren

. Project QA Engineer JMK/RCM/ rah HQA-78-107 Response: No ,

cc: Mr. R. C. Bauman Mr. B. W. Marguglio

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C < 1; a 78 REGULATORY INFORMATION DISTRIDUTION SYSTEM (RIDS)

DISTRIBUTION FOR INCOMING t1M FRI AL o-323?O REC: KEPPLER J G ORG: HOWELL S H DOCDATE: 05/26/78 CONSUMERS PWR DATE RCVD: 06/01/7t i\

NRC NOTARIZED: NO COPIES RECEIVED DOCTYPE: LETTER ENCL 1

SUBJECT:

LTR 1 FOWARDING CONSTRUCTION DEFICIENCY INTERIM REPT 83 FOR MCAR-20 CONCERNING W/ATT LTR CRACKED WELD BETWEEN STIFFNER AND WELDING RING OF PERSONNEL LOCK DTD 05/23/78 FROM EECHTEL PUR CORP RE PROGRESS OF HCAR-20 SINCE INTERIM REPT

1. 3.

REVIEWER INITI AL: XJM PLANT NAME: MIDLAND - UNIT 1 MIDLAND - UNIT 2 DISTRIBUTER INITI AL: gg, ocoo************* DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS ******************

CONSTRUCTION DEFICIENCY REPORT (10CFR50.55E)

(DISTRIBUTION CODE B019)

FOR ACTION: ASST DIR VASSALLO**W/ ENCL BR CHIEF VARGA**W/ENCLE -

PRa' ~^ HOOD **W/ ENCL LIC ASST SERVICE **W/ ENCL 3

INTERNAL: ttEG FIir"' / ENCL NRC PDR**W/ ENCL

. v. ta*W/2 ENCL OELD**W/ ENCL GOCSICK L STAFF **W/ ENCL MIPC**W/ ENCL BOYD**W/ ENCL DEYOUNG**W/ ENCL OABu*W/ ENCL R MATTSON**W/ ENCL KNIGHT **W/ ENCL ROSS**W/ ENCL TEDESCO**W/ ENCL EISENHUT**W/ ENCL SD**W/ ENCL K SEYFRIT/IE**W/ ENCL FERD DREHER/IE**W/ ENCL EXTERNAL: LPDR'S MIDLAND, MI**W/ ENCL TIC **W/ ENCL NSIC**W/ ENCL ACRS CAT A**W/16 ENCL l

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DISTRIBUTION: LTR 41 ENCL 41 CONTROL NBR: 781530009g SIZE: 2P+1P+1P /fdr em:m..................*............ 1HE eND ....... .......*..........* . . ..q l

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