ML20003E400

Interim Deficiency Rept,Originally Reported 800919,re High Energy Line Break Analysis Pipe Whip Restraint Designs.Pipe Whip Restraint Design Criteria & Procedures Developed for Mcar 40 Reanalysis Effort.Next Rept Will Be Sent by 810904

ML20003E400
Person / Time
Site:	Midland
Issue date:	04/03/1981
From:	Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, 80-04-#3, NUDOCS 8104030341
Download: ML20003E400 (4)

Text

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C011 Stim 0IS Power u-w c.*

Vice President - Projects, Engineenng and Construction General offices: 1945 West Parnell Road, Jackson, MI 49201 * (517) 788-0453 80-Oh #3 I

April 3, 1981 i

Mr J G Keppler, Regional Director Office of Inspection & Enforcement US Nuclear Regulatory Co==ission Region III 799-Roosevelt Road Clen Ellyn, IL 60137 MIDLAND PROJEC2 - UNITS 1 AND 2

'DOCKE2 NOS 50-329 AND 50-330 HELBA RESTRAINT DESIGN FILE:

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73*10*01, h2*10*03 SERIAL:

11525

Reference:

.(1)- J W Cook letters to J G Keppler, Same

Subject:

(a) Serial 8830,. dated September 19, 1980

-(b) Serial 10070, dated December 1,1980 This letter, as were the referenced letters,'is a 50 55(e) report concerning HEL3A restraint design. Enclosure 1 provides a description of the status of the planned corrective actions.

Another report, either interi= or final, will be sent on or before Sept ember h,' 1981.

. WEB /ir

' Enclosure 1: MCAR h0,IInteri=L Report #3, March 16, 1981 - "High Energy Line. Break Analysis (HELSA) Pipe Whip Restraint Designs" CC:

Director of Office of Inspection & Enforcement Att E Mr Victor Stello,- USHRC (15)

Director, Office o'f Management

.Infor=ation & Program Control, USNRC'(1)'

PJCook', USNBC Resident Inspector

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Midland Nuclear Plant.(1).

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Serial 11525 80-CL #3 CC: C3echhoefer, ASL3 GALinenberger, ASL3 FPCovan, ASLS AS&L Appeal Panel M{ Cherry, Esq

!Gincla!r CRStephens, USNEC

'4DPaton, Esq, USNRC FJKelly, Esq, Attorney General SEFreerrt, Esq, Asst Attorney General GTTaylor, Esq, Asst Attorney General

'4EMarshall GJMerritt, Esq, TNK&J s

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W Serial 11525 Bechtel Associates Professional Corporation M-* e 024933

SUBJECT:

MCAR 40 (Issued 8/26/80)

High-Energy Line Break Analysis (HELBA) Pipe Whip Restraint Designs INTERIM REPORT 3 DATE:

March 16, 1981 PROJECT:

Consumers Power Company

-Midland Plant Units I and 2 Bechtel Job 7220 Introduction This reports the current status of and actions taken on MCAR 40 since l

Interim Report 2.

Status of Actions 1.

Pipe-whip restraint design criteria and procedures have been developed for the MCAR 40 reanalysis effort.

Preliminary results have indicated.that modifications to restraint and embedment de-signs and locations will be required.

As results are finalized, design codifications will be made as necessary.

2.

.MCAR 40 recommended a chief engineer's revies of the HELBA group assumptions and work processes to determine whether other similar

. potential problems exist.. Based on review by the Bechtel chief nuclear engineer, this action'is considered complete.

No other areas were identified as having similar potential problems.

Corrective Actions The following corrective actions have been provided to preclude the recurrence of problems of this type.-

1.

Project. coordination meetings to discuss and to resolve interdis-ciplinary concerns have been held-weekly with few exceptions. These meetings will continue on a periodic basis until they are considered unnecessary.

2.

Biweekly HELBA group training' sessions have been conducted.

3.-

Bechtel Thermal Power Organization (TPO) Design Guide for Pipe Break Protection is being utilized by the HELBA group as supple-mental explanatory material for clearer understanding of the -

HELBA criteria contained in the FSAR'and its refc enced documents.

The guide is mandatory reading for the 'HELBA group engineers.

L.

Bechtel Associates Professional Corporation MCAR 40 Interim Report 3 024933 March 16, 1981 Page 2 Status of Restraints The table attached to Interim Report 2, Status of Pipe Whip Restraints Affected by MCAR 40, will be updated in the next report scheduled to be issued by August 21, 1981.

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