ML19329E375
| ML19329E375 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 07/10/1978 |
| From: | Heishman R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| Shared Package | |
| ML19329E376 | List: |
| References | |
| NUDOCS 8006120688 | |
| Download: ML19329E375 (1) | |
Text
"
fenwt as JUL ' 91973
.. mum Docket No. 50-329 Docket No. 50-330 Consucers Power Company ATTU:
Mr. Stephen H. Howell j
Vice President THIS DOCUMENT CONTAINS 1945 best Parnall Road P0OR QllAUTY PAGES Jackson, HI 49201 Gentlerae n:
Thank you for your interim report dated June 13, 1978, pursuant to 10 CFR 50.55(e) regarding reactor building spray piping supports.
We will review your final report on this matter upon receipt.
i l
' lour cooperation with us is appreciated.
Sincerely, R. F. Beishman, Chief Reactor Constructions and Engineering Support Eranch cc w/ltr dtd 6/13/78:
Central Files Reproduction Unit NEC 20b PDR Local PDR IiSIC TIC l
Ronald Callen, Michigan Public Service Commission Dr. Wayne E. North Myron !!. Cherry, Chicago s
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Hayes He n
i SURNAME >
7/14/78 oavE m NRC Form 318A (R2IE) (5-76) NRCM 02040
- U. s. GOVERNMENT PRINTING OFFICER 1978-253-818
i I
Stephen H. Howell
%c3 Presodent e,'
General Offices: 212 West Michigan Avenue. JeCheon. Mechtgen 49201 June 13, 1978 Hove-92-78 Mr J. G. Keppler, Regional Director j
Office of Inspection and Enforcement ii US Nuclear Regulatory Commission
!l R;gion III 799 Roosevelt Road Glen Ellyn, IL 60137
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MIDLAND NUCLEAR PLANT -
UNIT NO.1, DOCKET NO. 50-329 UNIT NO. 2, DOCKET NO. 50-330 REACTOR BUILDING SPRAY PIPING SUPPORTS
Reference:
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, Reactor Building Spray Pipin6 Supports, Hove-60-78, dated April 19, 1978 The referenced letter and this letter are interim reports. Attachments 1 end 2 provide Bechtel Associates Professional Corporation Interim Reports 2 cnd 3 to MCAR-1 Report No. 22 which provide the status of the analysis baing conducted to resolve the question of adequacy of the reactor building i
spray piping supports to the ASME Section III Code allowable stress rsquirements.
Another report, either interim or final, will be sent on or before S3ptember 1, 1978.
A/
m,Q Attachments:
(1) MCAR-22, Interim Report #2, dated May 5,1978.
(2) MCAR-22, Interim Report #3, dated June 2,1978.
CC: Dr Ernst Volgenau, USNRC (15)
Director of Office of Management t
Information and Prc6 ram Control, USNRC (1)
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, SUBJr.CT: MCAR #22 (Issued 3/21/78)
INTERIM REPORT #2 l
DATE: May 5, 1978 J MQICT: Consumers Power Company Midland Plant Units,1 & 2 Bechtel Job 7220 Status of Corrective Action and Investigation 4
Interim Report #1 provided a listing of actions initiated in resolving.
the situation. The status of these actions is updated as follows:
1)
Grinnell will reanalyse anchors when provided with revised load sheets.
2)
Piping system reanalysis has been initiated.
The intention remains to define specific loadings for each c' the subject anchors, rather i
than utilize a " worst-case" applicatica to sill anchors, as had been done previously. _ Water hammer analysis is in process. Thermal loading information as well as seismic response data for the subject system piping have been generated. This information is currently being transferred to individual anchor load sheets with appropriate axis translations being made for the curvilinear spray piping system.
3)
Procedural methods have been reviewed and will continue to be monitored.
Forecast Data for Investigation and Corrective Action Due to the complexity of the piping arrangement, completion of water hammer analysis is now scheduled for late June. Piping stress analysis will then be completed approximately one month later, with final reanalysis by Grinnell to follow immediately thereafter.
Submitted by o
ed Approved by d
a/>
Concurrence by
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MP/ cap BECHTEL ASSOCIATES PRjfFESSIONAL CORPORATIC 5/3/6 1
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P O. Sox 1000. Ann Atbot. %chigan 48106
SUBJECT:
MCAF. (22 (Issued 3/21/78)
~
iiiTERIM REPOR2
- 3
. -i -
DATE:
June 2, 1975 PROJECT?
Consumers Power Company Midland Plant Units 1 & 2 Bechtel Job 7220 STATUS OF CORRECTIVE ACTION AND INVESTIGATION No major developments, beyond those provided in Interim Report #2, are reported at the present time.
Scheduled dates for water hammer and piping stress analysis are unchanged.
Inasmuch as the next corrective action and investigative milestone, completion of water hamraer analysis, i,s scheduled for completion in late June, the next report will be provided by July 5,1978.
S'ubmitted by Approved by h
bfNA Concurrence by i
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