ML20093F713
| ML20093F713 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 07/06/1984 |
| From: | Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 30354, 83-14-#4, OL, OM, NUDOCS 8407230098 | |
| Download: ML20093F713 (6) | |
Text
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pb Consumers Power James W Cook Vice President - Projects, Engineenng and Constructwo General offices: 1945 West Parnall Pse1, Jackson, MI 49201. (517) 78& O453 July 6, 1984 83-14 #4 N'f Mr J G Keppler, Regional Administrator VRd K
D/RA DRS US Nuclear Regulatory Commission
'RC DRSS Region III 799 Roosevelt Road PA0 ML Glen Ellyn, IL 60137 SGA 0.L EIC O!
MIDLAND ENERGY CENTER PROJECT DRMA FILE loc.
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DOCKET NOS 50-329 AND 50-330 g
{g g DIESEL GENERATOR PIPING ANALYSIS FILE:
0.4.9.86 SERIAL:
30354
References:
J W Cook letters to J G Keppler, Same
Subject:
(1) Serial 26664, dated January 13, 1984 (2) Serial 28000, dated January 30, 1984 (3) Serial 30018, dated April 20, 1984 This letter, as were the referenced letters, is an interim 10CFR50.53(e) report involving differential settlement between the diesel generator structure and the diesel generator pedestal. The attachment to this letter describes the investigations that have occurred and the corrective actions that are taking place.
Based on the results of engineering investigations, this condition is considered to be reportable under the requirements of 10CFR50.55(e).
Another report, either in'terim or final, will be sent on or before September 28, 1984.
U v3 Co o t.
JWC/AHB/lr
Attachment:
MCAR-78, Interim Report 4, dated July 6, 1984 CC: Document Control Desk,'NRC DSHood, US NRC Washington, DC Office of NRR Midland NRC Resident Office INPO Records Center Midland Nuclear Plant 8407230098 840706 0C0784-0013A-MP01 PDR ADOCK 05000329
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Serial ~30354 83-14 f4 OM/0L SERVICE LIST LMr Frank J Kelley Atomic Safety & Licensing
-Attorney General of the Appeal Board deate of Michigan U S Nuclear Regulatory Commission Ms Carole Steinberg.
Washington, DC 20555 Assistant Attorney General Environmental Protection Division Mr C R Stephens (3) 720~ Law Building Chief, Docketing & Services i
j Lansing, MI 48913 U S Nuclear Regulatory Commission i
Office of the Secretary Washington, DC 20555 Mr Myron M Cherry, Esq
. Suite 3700 Ms Mary Sinclair.
Three First National Plaza 5711 Summerset Street Chicago, IL 60602 Midland, MI 48640 Mr Wendell H Marshall Mr William D Paton, Esq RFD 10 counsel.for the NRC-Staff Midland, MI 48640 U S Nuclear Regulatory Commission Washington, DC 20555-i Mr Charles Bechhoefer, Esq Atomic Safety & Licensing Atomic Safety"& Licensing Board Panel Board Panel U S Nuclear Regulatory Commission U S Nuclear Regulatory Commission East-West Towers, Room E-413 Washington, DC 20555 j
Bethesda, MD 20014 Ms Barbara Stamaris Dr Frederick P Cowan 5795 North River Road 4-6152 N Verde Trail Rt 3 Apt B-125 Freeland, MI 48623 Boca Raton, FL 33433-Dr Jerry Harbour Mr Fred C Williams Atomic Safety & Licensing i
Isham,' Lincoln & Beale Board Panel-
'1120 Connecticut Ave, NW, Suite 840 U S Nuclear Regulatory Commission, Washington, DC 20036 East-West Towers, Room E-454 Bethesda,.HD 20014 Mr James E Brunner, Esq j
Consumers Power. Company-Mr M I Miller, Esq 212 West Michigan Avenue Isham, Lincoln & Beale Jackson,'MI 49201 Three First National' Plaza L
52nd Floor _
Chicago, IL 60602
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3 Serial 30354 83-14 #4 Mr D F Judd
' Babcock & Wilcox PO Box 1260 John Demeester, Esq Lynchburg, VA 24505 Dow Chemical Building Michigan Division Mr Steve Gadler, Esq Midland MI 48640 2120 Carter Avenue St Paul, MN 55108 Ms Lynne Bernabei Government, Accountability Project Mr P Robert Brown 1901 Q Street, NW Clark, Klein & Beaumont Washington, DC 20009 1600 First Federal Bldg Woodward Ave f
Detroit, MI 48226 3/14/84 I
OC0784-0013A-MP01
l Attachment to 1
155250 83-14 #4 l
8 *" " 3 35' Bechtel Associates Professional Corporation i
SUBJECT:
MCAR 78 INTERIM REPORT 4 DATE:
July 6, 1984 PROJECT: Midland Plant Units 1 and 2 Consumers Power Company Bechtel Job 7220 Introduction This report provides the status and course of action required by Management Corrective Action Report (NCAR) 78.
Description of Concern Requirements for differential settlement between the diesel generator building structure and diesel generator pedestals were not accounted for in the design of piping, equipment, conduits, and pipe supports.
Historical Backaro'und and Investiaation The NRC verbally notified Consumers Power Company on December 2, 1983, that an allegation was made regardin's consideration of differential settlement in piping design. Consumers Power Company notified Bechtel on December 9, 1983, about this allegation.
In reviewing this allegation, Bachtel determined that the possibility that differential settlement may i
J not have been fully considered in the design was first identified during internal Bechtel engineering safety evaluation discussions on l
November 21, 1983.
Bechtel notified Consumers Power Company on December 13, 1983, that there was validity to the allegation, and Consumers Power Company notified the NRC on the following day that the condition was considered potentially reportable under the Code of Federal Regulations, 10 CFR 50.55(e). On December 19, 1983. MCAR 78 was issued to address and resolve this deficiency.
A schematic sketch (SK-M-2542, Rev C) has been prepared showing interconnections to the diesel generate pedestal and building and is attached to this report.
Analysis of Safety Implications A review has been completed of all commodities. The only commodities adversely affected are:
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i55250 Bechtel Associates Protessional Corporation E R 78 Interim Report 4 j
Page 2 1.
Service watec piping connected to the diesel generator jacket water cooler exchangers (IE-25A,28-25A, 1E-258, and 2E-258)
The resulting nozzle loads from the settlement analysis using the currently designed system were transmitted to the vendor for review and subsequently found unacceptable.
2.
Expansion joints between the diesel generator and exhaust silencer piping (yec IIJ-5201A and C, 1XJ-5201B and D, 2XJ-5201A and C, and 2XJ-5201B and D)
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3.
Pipe restraints attached to the non-Q maintenance platform supports (1-652-2-21, 23, 25, 27, 29, 31, 33, and 35)
Root Cause, Misunderstanding of the design requirements aaJociated with the diesel generator building (pedestal / floor slab / building) configuration, Corrective Action 1.
The service water piping system has been reanalyzed using required settlement data. Design modifications necessary to accomunodate acceptable nozzle loadings have been made to the pipe support system. The support redesign was completed and issued in May 1984.
2.
An investigation has been rJmpletml to determine where a slallar condition may exist considering the settlement boundary between the diesel generator pedestal, float ing slab, and interior walls. All commodities were found to be acceptable excepted as noted.
Nonconformance Report B-00011 was issued June 19, 1984, to document the nonconforming hardware and to track corrective action on expansion joints YES 1XJ-5201A & C, 1XJ-52018 and D, 2XJ-5201A and C, and 2XJ-52018 and D.
Nonconformance Report B-00012 was issued June 19, 1984, to document the action on pipe restraints 1-652-2-21, 23, 25, 27, 29, 31, 33, and 35.
Nonconformance Report C-02163 was issued March 29, 1984, to document corrective action of nozzles on equipment 1E-258, 2E-258, II-25A,25-25A.
l 3.
Specification 7220-M-345 Rev 7. December 30, 1983, was revised to incorporate loads due to single, noncepeated anchor movement (SNAN) loading effects.
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l 0538u l
Bechtel Associates Professional Corporation 155250 ma is Interim Report 4 Page 3 g
4.
The process by which FSAR requirements are incorporated into the final design documentation was evaluated and found adequate.
5.
Project engineering has identified all structures subject to differential settlement.
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6.
Project engineering will verify that the effects of differential settlement identified in Item 5 were considered. This task will be completed by July 13, 1984.
7.
Retrain engineering personnel as appropriate, based on the results of Item 6 above.
Reportability This deficiency was reported to the NRC by Consumers Power Company as a potential reportable condition under 10 CFR 50.55(e) on December 14, 1983.
BS/MH/rar*(PD) submitted by:
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E.B. Poser U)
Project Engineering Manager Approved by:
A. 8d
's B.R. Klein Plant Design Chief Engineer
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Approved by:
E.N. SEthh
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Engineering Ma Concurrence b :
t b,,. a 1.A. Dietrich Project Quality Assurance Engineer Attachment SK-N-2542, Rev D 5
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