ML19322B999
| ML19322B999 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 06/29/1970 |
| From: | Case E US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Morris P US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7912200714 | |
| Download: ML19322B999 (4) | |
Text
Fs JUN 2 01970 Peter A. !!orrin, Director Division of Reactor Licensing OCO:lf.E liUCLEAR POWER STATIO:;, U:!1TS 1, 2, R D 3 - DOCKET NOS. 50-269, 270 N;D 287 The infomation subnitted by the subject applicant trith rer:pect to the containment and Class I structural design has been reviewed and evaluated by the DPS Structural Engineering Branch. An evalw.-tion of the information subnitted to date is attached hereto.
Original signed by E. G. Case Fdson G. Case, Director Division of Reactor Standards Eucionure:
Evaluation for Oconee I:uclect rever Station cc v/ encl-R. DoYoug, D:1 R. !;acenrv. DRS C. Long. Di'J.
A. Dro,crich, DRS A. Sclivencer,1A1 F. Schaue.r. DPS R. Shee.2akor, DRS
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OCO:;En ::UCLEAR POWEn STATIO:: U'iTTS 1, 2, N;DJ DOCKET fioS. 50-269, 270, 207
!.UCLEAR STRUCTURES 1.0 __
l S_TRUCTURA1. ULSCRIpTIO:i_,_ DESIG'l CRITURIA, N:D _ OADS L
i 1.1 The structures of the f acility are very similar to those of recently licenced operating facilitics of the PUR type, such as Palisades, for which the Bechtel Corporation was the architect-engineer and constructor.
The contain=cnt is principally of prestrecsed concrete construction uith design detailo very sicilar to those of the Point beach and l
The structures interior i
i Talisades nucicar power facility containments.
to the contaim;cnt are of missive reinforced concrete construction.
The auxiliary butiding is of reinforced concrete colu:-n, bea a, and olab construction while the turbine building is of structural secc1 I
I with panel aiding,
'ihe loadin::s, their combination and ricthod of application are in accord i
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uith procedures that ve have accepted an representing current good practice.
1.2 CO:GAI141tE::T STRUCTURAL DESIGU K:D D L SI G:: K:ALYSIS f
The designer has employed analysis techniques that account for thich valled areas (such as the ring girder region), the influence of the Special foundation and the creep and crackins, properties of concrete.
attention has been given to liner, buttress, and large openinr, design.
The stresses and deformations have been kept to very conservative values as indicated in the tabular stress su== aries.
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- N;D DESIC:I K:ALYSIS-1.3 C;UERAL LTRUCTURAL DESIC::
In the design of Class I structurcs other than the containment, due 1
carc appearn to have been exorcised. E c interior chield structure
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desi;:n, an an exerple. chcr.rs careful consideration of the irportcut loads such as differential pressure across compart=ents and inertia lands resulting frces postulated scisnic ground notion.
1.4 SEIPtIC DESIC'; N;D DESIC:; A:iALYSIS Careful attention han been given to the scinnic design of the facility. n e principsi structures: the contain. ment, the internal structure, the auxiliary building, and the turbine building have been dynanically analyzed by the response upcctrun technique usinn
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The Class I pipin;, cutside the containnent cppropriate shock spectra.
These rcthods have been analyzed using equivalent static cethods.
l have been conservatively applied.
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1.5 STrICTt:tALJtATcnIALS, Cy.piRUCTIO::_ TECw;Iqllt:1 N:D,CUALITY C0:, TROL The structural unteriale, constructicu technf r;ues, and quality control Based on employed have been indicated in none detail in the T:AR.
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l this information and the etcplicace reports citirig the extent to vhich the quality centrol progres is beinn carried out in the field, l
it is considered that a good quality product is being achieved.
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- 1. fa STRUCREAL ACCEpTN CE TESTING AND SURVEILLANCE t
The applicant has outlined his structural and leakage acceptance test i
program. The structural surveillance program for the containtr.nts has also been established. Nine tendons of one contain cat have been
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aciccted.for surveillance. The tendon nonitoring program consists csacntially of nonitoring of tendon forca by lif t-off readings and l
sampling of selected tendons; first, at five years af ter plant startup i
cud, thereaf ter, at an interval to be determined when the results i
of the initial surveillance test.sre knavn.
Ecchtel Corporation is in the process of completing a statistical study to substantiate the appropriate frequency, numbers, types and positions of tendons for a i
containnent of their type.
It is our intent to. require that the results of this study be considered for application to Oconce and, also, that visual inspection of the containment interior including the liner and punctrations additionally be performed as a part of the structural soundness curveillance. The program as proponed and nodified above is considered acceptabic. Mcnitoring for scisnic tround cotion in also being provided.
i l.7 _CO:ICLUSIONS Based on our review of the Oconce structural design, construction and plans for testing and surveillance, the structural features of the facility are considered to provide ar. adequate narcin of safety.
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