ML20080A858
| ML20080A858 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 01/27/1984 |
| From: | Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 27992, 81-05-#11, 81-5#11, 81-5-#11, NUDOCS 8402060371 | |
| Download: ML20080A858 (6) | |
Text
__
Consumers Power James W Cnok h@
Vice President - Projects, Engineering and Construction General offices: 1945 West Parnett Road, Jackson, MI 49201 e (517) 788 0453 January 27, 1984 81-05 #11
~
SD-5fj so-33c Mr J G Keppler, Regional Administrator US Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 MIDLAND ENERGY CENTER PROJECT DOCKET NOS 50-329 AND 50-330 SHEAR REINFORCEMENT AT MAJOR CONTAINMENT PENETRATIONS FILE:
0.4.9.53 SERIAL:
27992
References:
J W Cook letters to J G Keppler, Same
Subject:
(1) Serial 11993, dated May 15, 1981 (2) Serial 12066, dated July 31, 1981 (3) Serial 14635, dated December 14, 1981 (4) Serial 16126, dated March 12, 1982 (5) Serial 17511, dated June 4, 1982 (6) Serial 17598, dated August 31, 1982 (7) Serial 19119, dated December 17, 1982 (8) Serial 20730, dated March 18, 1983 (9) Serial 22234, dated June 13, 1983 (10) Serial 23828, dated October 31, 1983 The referenced letters were interim 50.55(e) reports concerning the adequacy of shear reinforcements at major containment penetrations.
This is the final report.
The attachment summarizes the analyses of five major penetration areas which conclude that the containment shell meets design requirements. As a result, this condition, which was considered "potentially reportable" is shown to be 8402060371 840127 PDR ADOCK 05000329 S
PDR l
94 il 1
OC0184-0044A-MP01 16 J'[O)
7 2
Serial 27992 81-05 fil not reportable. Consumers Power Company engineering personnel and an independent consultant, Professor M A Sozen, have concurred with the approach used to reach this conclusion, a
JWC/AHB/lr
Attachment:
Bechtel Letter BLC-18855 (J A Rutgers, Dated January 19, 1984)
CC: Document Control Desk, NRC Washington, DC RJCook, NRC Resident Inspector Midland Nuclear Plant DHood, NRC Office of NRR INPO Records Center
?
OC0184-0044A-MP01
3 Serial 27992 81-05 #11 OM/0L SERVICE LIST Mr Frank J Kelley.
Atomic Safety & Licensing Attorney General of the Appeal Board State of Michigan-U S Nuclear Regulatory Commission Ms Carole Steinberg, Esq
- Washington, DC 20555 Assistant Attorney General Environmental Protection Division
- Mr C R Stephens (3) 720 Law Building Chief, Docketing & Services Lansing, M1 48913 U S Nuclear Regulatory Commission 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 Mr Charles Bechhoefer, Esq Atomic Safety & Licensing Atomic ~ Safety & Licensing Board Panel Board Panel U S Nuclear Regulatory Commission U S Nuclear Regulatory Commission Washington, DC 20555 Washington, DC 20555 Dr Frederick P Cowan Ms Barbara Stamiris 6152 N Verde Trail 5795 North River Road Apt B-125-Rt 3 Boca Raton, FL 33433 Freeland, MI 48623 Mr Fred C Williams Dr Jerry Harbour Isham, Lincoln & Beale Atomic Safety & Licensing 1120 Connecticut Ave, NW, Suite 325 Board Panel Washington, DC 20036 U S Nuclear Regulatory Commission Washington, DC 20555 Mr James E Brunner, Esq Mr M I Miller, Esq Consumers Power Company Isham, Lincoln & Beale i
212 West Michigan Avenue Three First National Plaza Jackson, MI 49201 52nd Floor Chicago, IL 60602 Mr D F Judd Mr John Demeester, Esq Babcock & Wilcox Dow Chemical Building PO Box 1260 Michigan Division Lynchburg, VA 24505 Midland, MI 48640 Mr Steve Cadler, Esq Ms Lynne Bernebei 2120 Carter Avenue Government Accountability Project St Paul, MN 55108 1901 Q Street, NW Washington, DC 20009 September 6, 1983 OC0184-0044A-MP01 e_,-,.-
,n.
,--.nn.-
y,,.,
, - ~. -,-,
,-_,,_n.n--
,n,,...
_.,,,n--.y,
,-g._.,..m,,w,ry,p,.,.,.,-,.,,
i-
~ -
i.
Attachment to
~.
Serial 27992 Bechtel Power Corooration i40238 777 East Eisenhower Parkway Ann Arbor, Michigan MM Asaren. P.O. Box 1000, Ann Arbor, Michigan 48106 January 19, 1984 BLC-18855 Consumers Power Company 1945 Parnall Road Jackson, Michigan 49201 Attention: Mr. J.W. Cook Vice President Projects, Engineering and Construction
~
Subject:
Midland Plant Units 1 and 2 Consumers Power Company Bechtel Job 7220 MCAR 51 REMAINING ACTIONS
References:
A) CPCo letter, Serial 20730, 3/18/83 (attachment to Com 109065)
B) BLC-17176, 6/16/83 (Com 118989)
C) BLC-18663, 12/13/83 (Com 137039)
This letter informs you of the completion of the remaining actions by Bechtel project engineering regarding MCAR 51, Shear Reinforcement at Major Containment Building Penetrations, dated April 21, 1981 (References A, B, and C).
i l
The containment areas near the personnel lock, equipment hatch, emergency air lock, purge line, and main steam line penetrations have been determined to be adequate.
The penetrations were evaluated as follows:
1.
Equipment Hatch The equipment batch is the largest penetration, with a diameter of 13'-10".
The existing finite-element model of the containment near the equipment hatch was improved to accurately represent the as-built condition. It was analyzed using the Bechtel Structural Analysis Program for the critical load combination, with 1.5 times the design internal pressure load. The calculated tensile stresses in the main reinforcement (along maridional and hoop directions) and posttensioning tendons, shear and compressive stresses in the concrete, and strains in the liner plate meet the allowables of ASME Section III, Division 2, Code for Concrete Reactor Vessels and Containments, 1983.
Bechtel Power Corporation BLC-18855 L($Q23g January 19, 1984 Page 2 i
2.
Personnel Lock The personnel lock penetration has a diameter of 10'-6".
The containment wall near the personnel lock was evaluated using a detailed, finite-element model developed recently. The load combinations with seismic loads were demonstrated by analyses to be less critical than the load combination, with 1.5 times the design internal pressure load. For the critical load combination, the internal force distribution corresponding to an elastic, uncracked, homogeneous condition showed the meridional reinforcement stresses (inside face only) at the top and bottom of the lock to exceed ASME Section III, Division 2 Code allowables. The localized high reinforcement stresses were mainly due to the secondary meridional forces caused by the deflected hoop tendons near the lock.
The adequacy of the containment shell was demonstrated by improving the model to obtain a " lower bound capacity" solution. The local areas strained highly by the secondary forces were softened to about 15% of their original uncracked stiffness. The new force
~ distribution corresponding to the " modified-stiffness" model was shown to result in stresses and strains within Code allowables at all locations.
t 3.
Main Steam Lines The original design calculations for the main steam line penetrations (4'-6" diameter) have been reviewed and found to be adequate.
4.. Emergency Air Lock The emergency air lock penetration has a diameter of 6'-0".
According to BC-TOP-5A, Bechtel Topical Report on Prestressed Concrete Containment, this represents a small penetration because it has a diameter (6'-0") less than 2-1/2 times the nominal containment wall thickness (2.5 x 3'-6" = 8'-9").
The containment wall near the emergency air lock has been evaluated and found to be adequate following the prccedure given in BC-TOP-5A.
5.
Purge Lines Purge line penetrations (5'-0" diameter) are smaller than the emergency air lock. The containment near the purge line penetrations have more reinforcement than near the emergency air lock. Therefore, i
the purge line penetrations are considered adequate based on evaluation for the emergency air lock.
i I
,..,.,.., -, -.,.. - - -. ~,, - -, - -. _. - _,. - -, -. - - - -.. - -
. - -, ~ _ -,..,. _. - -
. ~. -
0 Bechtel Power Corporation 14 0 2 3 f1 stc-18855 January 19, 1984 Page 3 Evaluation of the equipment hatch and personnel lock areas and the design details of the emergency air lock and purge line penetrations have been reviewed independently by a consultant. The consultant has concurred with the procedure used for the evaluation.
A summary of the evaluation procedure, analytical models used, allowables, and results for the major penetration areas of the containments are being incorporated in Midland FSAR Subsection 3.8.1.4.7 via FSAR Change Notice 4153.
Very truly yours,
^A John Rutgers F Project Manager l
JAR / @GEC/arv CC:
W.R. Bird J.W Cook G.R. Eagle R.J. Erhardt W. Friedrich L. Gibson J.P. Knight D.T. Perry D.L. Quamme B.W. Marguglio R.A. Wells t
l r
Written Response Requested: No l
l l
l l
l
.-