ML19331B277
| ML19331B277 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 08/19/1977 |
| From: | Renfrow R ISHAM, LINCOLN & BEALE |
| To: | Coufal F, Leeds J, Luebke E Atomic Safety and Licensing Board Panel |
| References | |
| NUDOCS 8007280876 | |
| Download: ML19331B277 (1) | |
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ISHAM, LINCOLN & BEALE CCUNSELCRS AT LAW
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CHICACO,lLLINCIS 6C6C3 THIS DOCUMEN' CONTAINS r e t c ~o ~
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- August 19, 1977
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202-433 9730 Dr. J. Venn Leeds, Jr., Esq.
Dr. Emmeth A. Luebke 10807 Atwell Atomic Safety and Licensing Houston, Texas 77096 Board Panel 5._ n,,, 9.g.3, U.S. Nuclear Regulator'I Comm.
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Washington D. C. 20555 L
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2 Frederic J. Coufal, Esq.
Chairman Atomic Safety and Licensing Board Panel U.S. Nuclear Re Washington D. 'gulatorf Comm.
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20555 RE:
Midland Proceedinc - Unit 1 Tendon Sheathine Gentlemen:
Enclosed is the final report on the misplacement of the tendon sheathing for Midland Unit 1.
As you will note, the repair has been completed and the Bechtel nonconformance has been closed out.
This report completes the documentation required by the NRC on this item.
There was no impact on the construction schedule as a result of this repair.
When the final cost of the repair is obt:ained, I will supply you with that informatien.
When the final report on the Unit 2 liner bulga is completed, I will provide the Board with a copy.cf that report.
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Very tru h onrs,
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R.j Renfrow III l
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- stephen H.Howell Mce Prt:ident General of fice,: 1945 West Parnast Road, Jackson, Michigan d9201
- Area Code 517 788-0453 August 12, 1977 Hove-lh0-TT
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Mr J G Keppler, Regional Director us.u:;
Office of Inspection and Enforce =ent US Nuclear Re5ulatory Cc-4ssion D
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Glen #117n, IL 60137 O /
2CDLAND NUCLEAR PLANT - UNIT NO 1 TI~iDON S E THING
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FINAL REPORT - DcCEl' No 50-329
References:
1.
Letter, S E Howell to J G Keppler, "Midl ed Nuclear plant -
Unit No 1 Tendon Sheathing Interin Report - Docket No 50-329,,"
Serial Hove-82-TT, dated May. 19, 1977 2.
Letter, S E Howell to J G Keppler, " Midland Nue' aa-51 e' Unit No 1 Tenden Sheathing Interim Report - Docket No 30-329,"
Serial Hove-112-TT, dated June 20, 1977 3
Letter, R F Eeisk-e to S E Eevell, Docket No 50-329 and Docket No 50-330, dated July 27, 1977.
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Letter, J M Klacking to W R 31r:1, Letter No HQA-TT-316, dated July 28, 1977 5
Letter, J G Keppler to S E Eovell, Docket No 50-329, dated April 29, 1977 g
References 1 and 2 vere interis repohs which provided a dc.scription of the deficiency, an analysis of the safety implications, and the proposed method of repair.
This is a final" report and includes corrective actions taken to preclude recurrence of a s4 41ar situation.
The Nuclear Regulatory Co==ission was advised of the repair =ethod in an interi=
report (attached to Reference 2) and in a tech '. cal =eeting in Ann Arbor on June 30, 1977 Reference 3 documented both the June 29 URC inspection of the repair area and the NRC participation in the June 30 neeting in Ann Arbor where it was agreed that Consumers Pcver could proceed with the repair. The repair was cc=pleted on July 22, 1977 and Bechtel Nonconfor=ance (NCR) 778 vas closed out at that time.
Corrective action taken by Bechtel Fover Corporation is docu=ented and verified in Reference h and its attach =ent (both enclosed).
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Ergian III, USURC 2
Midland Tendon Sheathing Final Report August 12: 1977 In addition to the 3echtel corrective action, Consu=ers Power Cc=pany expanded its inspection progra= to include all =-'ad ents for Class 1 structures pricr to release for concrete place =ent.
This is consistent vith the Cons==ers Power Co=pany ec--4tnent documented in ite: 3 of Reference 5.
Also, there has been an on-going joint effort by Const=ers Power Cc=pany and Bechtel to reevaluate all 3echtel Quality Control Instructions (qCIs) with the objective of i= proving the co=pleteness and specificit/ of inspection procedures and acceptance criteria.
Reevaluations have been ec=pleted for all QCIs ccver-ing first-line inspection activities. and d' afts of these revised QCIs are being re-reviewed with a target date of Septe=ber 15,197T for their final approval and inple=entation.
Eovever, the QCI covering the installation of post-tensioning ec=ponents (C-9.00) had been revised and received final approval.on April'20, 1977, incorporating the corrective actions indicated in Reference h.
In view of the above, Consu=ers Pcver Cc=pany believes adequate and cc=prehensive corrective action has been taken and sub=its this as a final report in this =atter.
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Dr F.rnst Volgenau, USURC (15)
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Director, Office of 1'.anage=ent Infor=atica and Progrs= Control, USURC (1) 3CC: 3'.W.a rgu611o/iE31rd /JEb cls ren/HW31a ge r/ File :
16.0 GSKeeley, P14 k063 JL3 acon, M-lC85A
-RRRenfrcu, Il&3 TCCocke, Midland FJ.Castleberry, 3echtel, AA JLCorley, Midland JMKlacking, Ee:htel, AA File:
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Bechtel Power Corpora' tion 777 Erst Eisennewer Patcuay-
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Ann Arbor, Michigan Med deess: P.O. Box 10CO. Ann Ar::ct, Micnigan 481CS July 28, 1977 Mr. W. R. Bird CONSUMERS PCWER QOMPANY 1945 West Parnall Road Jackson, Michigan 49201 Midland Units 1 and 2 Consu=ers Pcver Cc=pany Bechtel Job 7220 CLOSURE OF MCAR-17 File: Q-2100
Dear Mr. Bird:
Attached is a Bechtel ICM verifying closure of MCAR-17 on Misplaced Tendon Sheathing. An Engineering Final Report was trans=itted to CPCo on 6/17/77 describing the deficiency, corrective action and safety inp11 cation. Bechtel QA has verified that corrective actions to prevent recurrence have be e i=ple=ented.
Sincerely, 9
J. NC Klackin y
,a Pr ecdI E nee JMK/nev HQA-77-316 l
Response
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Attach =ent
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Bechtel Power Corporation Inter. office Memorandum To P. A. Martinez Date July 28, 197.7 Subject Midland Project - Job 7220 Frorn J. M. Klacking Closure Verification of MCAR-17 Misplaced Tendon Sheathing of Quality Assurance File:
Q2100, MCAR-17 Cepies to At Ann Arbor J. B. Violette 6(B) Section 1.
T. M. Leverette P. Her=eston E. A. Ru=baugh J. M11andin J. F. Newgen R. L. Castleberry J. P. Connolly G. L. Richardson
Reference:
A)
Project Engineering's " Final Report" dated d/13/77 and revised 6/17/77 B)
Bechtel Letter v/ attach =ent to CPCo, BLC-4079, dated 5/10/77 The subject MCAR is now closed based on conclusions, per Reference A, that the original design criteria could be =et by rerouting one sheathing from below to above the penetration with ninor align =ent adjust =ents to the sheathing directly above.
Align =ent of the three sheathing directly below tha penetration will also be revised. An evaluation by li!ruCCO indicates th_c the friction losses in the affected tendons have been reduced due to this revised align =ent and the capability of the contain=ent structure to resist forces has been i= proved.
Strength losses due to cuts in the penetration gusse't plates and the cut-offs of rebars, both necessitated by the rerouting of the tendon sheathings, have,been fully replaced by the =odifications discussed in Reference A.
Therefore, there is no adverse safety i= plication.
Corrective actions have been i=ple=ented to preclude recurrence of misplaced tendon sheathing as indicated in Reference I.
These include requirc=ents for:
1.
Survey notes to receive initials verifying position of each individual sheathing.
2.
Field Engineering to take a copy of the sheathing drawings with thc= during installation and check off each sheathing for corrcet configuration.
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HQA-77-314 7/28/77 3.
Quality Control to = ark up a sheathing drawing during place-ment checkout to verify correct configuration-and nu=ber of sheathing.
Additionally, Quality Control and Construction Division !!anagers' discussions with all Bechtel field ccustruction persennel vera conducted e=phasizing the responsibilitics of construction quality control, field engineering and super-vision at the 111dland jobsite.
Bechtel QC has ex'e=plified the policy of stressing inspection acceptance be made on the basis of evidence which clearly de=onstrates that the harduare is in exact agres=ent with applicable drawings and specifications by revi-sions to QCIs.
Bechtel QC is kept current on schedule changes by area Supervision and Field Engineering personnel as part of their nor=al coc:=:sications.
Additionally, QC personnel attend daily scheduling =eetings where changes to the published three week schedule are discussed.
The i=portance of this cor=unication. flow is continually stressed to all concerned parties.
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J. 'g acking gj, 3 JMK/IGB/nev HQA-77-314
Response
No
Attachment:
MCAR-17 e
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