ML19256D253
| ML19256D253 | |
| Person / Time | |
|---|---|
| Site: | Oconee, Crane  |
| Issue date: | 06/02/1967 |
| From: | Schauer F US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Long C US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7910170765 | |
| Download: ML19256D253 (8) | |
Text
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JU' 2 UI7 C. G. Leag, Chief, Easctor Project Branch #3 Division of Emactor Licensing R. C. DeYoung, Chief, Containment & Component Technology Branch, D"L THED:
F. F. Schauer Cent =4====t & Campement Tschoology Branch TRWEr MILE ISLAND CONTATing!NT DESICM, DOCKET NO. 50-289 rz.rvn: DEL
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e== tai====t system design for the Three Mile Island Nuclear Power Semeian has been reviewed en the basis of information presented in the PSAR (Preif=4== 7 Safety Analysis Esport).
The esme=4====e structure is a typical structural concrete containment of right sire =Ime cylinder, alliptical dams, and flat slab base geonetry.
It is prostressed in the cylinder and dame regions and stilizes reinforced
"~~ ~2asserete constructism in the base slab.
The design is quite =i=41=e in basic concept to the concept used for the Since the deemilmd design is being undertaken by a Osames cenemismants.
different A-E than the see r==r===4his for the oconee containments, hauever, signifia.ast differomees naturally exist fu analytical procedures sad design details. A list of gemstions relating to areas where further informaties is desirabia is attached.
Attaeh===t:
List of questicas S. Levine, Asst. Dir. for Esactor Technology ce:
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DRL Reading ADRT Reading C&CTB Reading R. C. Deyoung F. P. Schauer
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WP QUgSTIONS REf4 TING TOs THIZI MIL: ISLAND CONTADDENT DESIGN 1.
Design Loadinas and Factors A.
Provida scalad load plots as a function of containment height for moment, shear, deflection, longitudinal force, and hoop tension resulting individually from prostress, dead, pressure, design basis earthquaka, wind, liner thermal (normal and accident), and tonerate thermal (normal and accident) loadings.
B.
Provide stress levels for significant areas in the coormin= met structure which result from the chosea leading combinations.
C.
Provide a load conbination for tornado loading.
D.
Provida the temperature grad 4=nts calculated to exist across the contain===t shall under operational anddasian basis accidant conditions.
E.
Describe in more detail the wind lead parsaaters and pressura distributism assumed.
II. Desian Criteria sad Proceduras A.
Saisn'.a Analysis 1.
Provide the smalytical mode (iaald4ng eensideration of mass distributtee, stiffness seefficients, sad vibrational modse) and the analytical preesdares maad in arriving at a leading distributism on the structure.
2 Clarify the " algebraic" addition of vertical and horizontal em4=={e componentJe.
3.
Justify er revise the one-half factor for vertical acceleration for the===4==
earthquaks condition.
'4 3.
Large Openings 1.
Provide critaria with regard to what size opening constitutes a large opening; hones, mariting special design consideration.
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3.
Indicate the primary, secondary, and thensal loads that will be considered for design of these openings, including design cambinations.
I 4
Provide more detail on the analytical motheds that are being used in design of large openings.
C.
Shell Analysis i
1.
h general shall analysis procedures are not provided in suffi-cient detail that a judgment may be made as to their adequacy.
l Provide a description of the analysis procedures for the structure i
to include a detailed description of the analytical technique j
used, infomation verifying the acceptability of the eachnique, smple calculations, the general genastry utilised to determine structural stresses and the consideration given to struct.Jral stiffness and discontinuity affects.
2.
The malysis procedures for treating non-axisymmetria loadings such as earthquake e d wind lateral 1 9 4=s are not clear. Pro-vida a detailed esplanation.
3.
Describe the malysis praeaAwes for the ceneminment basa slab design, par 4=1=ely with respect to non-exisymastric loadings.
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D.
Missile Protection 1.
Provide the analytis.a1 precedures to be used in.dssign of missile shields.
i 3.
Penetrations 1.
The adequacy of the piping penetration details as shown in assur-ing that pipe ruptures at the coneminment shall will not result in less of con min==nt laakage integrity is questioned. Provide e
analytical backup for the piping penetrations.
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2.
Provide the general critaria for and methods of reinforcing the concrets structure at and around penetrations.
l 3.
The amaning of your "5.1.2.6.1 d critation" is not understood.
Provide further amplification.
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4.
The intent with regard to limitation of camperature in the concrete structure around hot piping penetrations is not clear. Indicate your criteria in this regard.
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Shear
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galiance on ultimata values of shear (daad as a====we of beaa i
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I strength La diagonal tension) does not seem particularly appli-l I
cable to shall structures. Provide amplification and justifi-cation.
2.
In view of tha f adicated non-conservatism of the ultimate strength previsises of ACI 318-63 for cambined loading, your design criteria in this ares mast be nors amplicitly indiectad.
G.
Liner 1.
Provide the types med combinations of leading considered with regard to liner buckling. Also, the safety critaria, with respect to buckling.
2.
frevide the geometrisal pactarn, type and ;*as of liner at-tachments sad the analysis proceduras, boundary conditicas sad results with respost to bookling under the leads cited in mswer to "1" above.
3.
Psovide the stress and strain limits used for the liner, the bases Ser theae limits, and the autant to *=h these ifaits relata to liner leadsage.
4.
Provide a discussion of the pressure /rhammi lead variations j
oorsidered.
5.
Provide the analyttaal procedures and techniges to be seed in liner anchorage desian. incinding enemple==1a=1=tions.
6.
Pavide the failure mode and failure propearacion characteristics of anchorages. Discuss the extent to idtich these characteriscies i
inflesace lask tightness integrity. What design provisions will be incorporated to prevent anschorses failures from jeopardizing le ciset-tight integrity?
7.
Ptsvide the anchersas design considerarians given to and tolerances em 11aer piace out-of-r==dness,11aar plata fitup, liner plata thickness and liner yield strength variacian and thana bases.
i 8.
Provide prueradures for maalysis of liner stresses around openings.
Also providh. % method of liner desism to acocemedata thesa stresses and the related stress limits.
9.
Provide eh damiga spyreach that will be need h loadings must be transferred through the liner auch as at crane brackets or meshinery equipment mounts. Also, provida typical design details.
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- 10. Pavide the liner detail to be used at.the, base-cylinder liner juncture, the strain conditions imposed at the juncture, and an analysis of the capability of the chosen liner detail to absorb these strains under design basis accidaat condicimos.
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- 11. Pmvide a discussian of the extent to whi.:h essemi==at vacuum can influence liner buckling and the capability of the chosen liner /
actastment arr=ta==at to resist possible vacuum loading.
l E.
Anchormae Selse Desian l
1.
Pmvide a descriptism of the analysis prae = Ares used for anchorage moaa malysis and typical analytical results.
2 Provide typteal details of anchorage sone reinforcing.
3.
Provide test data supporting the acceptability be your reinforcing method to resist the impaired oneherage loading (pa.ticularly under autanded leading).
III. Nacertate A.
Reinforviam steel 1.
Cassiderias the aritical asture of the structors, a estarial specifi.
macia= en splicing is namenmaasco with ACI 313-63 does not provide adequata assuranse of structural destility. Revise your p terial performance criteria in this regard and provide more esplicit in-foimmation with regard to the type of oadwald splicing intended.
2.
Indicata the entant to which splice stagger will be achieved.
l 3.
Tadicara the laa= rima of and aztent to af ch splicing or tacking i
of reinfersing etsel will be made by welding.
I 3.
Prestressian Materials l
l 1.
Pavide a deem 41ad description of the prestressing meterials and hard re.e1 e.d.
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2.
Justify the prostreesing system selection. Ynelnda data with re-gard to ultimate tenson strength, elongation, anchorage strength, harduate dysseic performanee, etc.
C.
Liner and Penetrations I
i 1.
Provide the metsM selections for conta4===t penetrations and f adients the NMT considerations in their selection.
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I D.
Corrosion Pietection
,I 1.
Provide the catacrate cover provisions for reinforcing steel and ys i.s.ssing for the done, base slab and cylinder. Include for comparison the minf=w code requirements.
4 2.
To what estant will a== tar proofing v=A or membrane be used for the con =4===at base slab and lower cylinder arcat e
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IV. Construction i
A.
Genersi i
I 1.
Indicata the endes of practice that will be followed in the con-l taimasat sonatzwetion.
t 2.
Indicata diosa and to dat entant ACI 301 standard practice for sonstruction will be equaled, "d, or not followed.
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3.
Puurride the general construction p=*Ws and sequence that will be used in construction of the e=neminnant to include j
ensavatima ground water control, base slab construction, liner erection and tastias, and eonerate construction in cylinder l
and done resians.
l 5.
Ceesrets 1.
Provide the concreta =4-4a*. placing and curing procedures to be used.
2.
Provide the y.h for bonding between ILf ts.
3.
Indicate the==nnar in which concreta lifts vill be placed and staggered.
4.
Tadirate the areunt of user check testing of cement to be ac-esmplished.
C.
Esinforcinst $tsel 1.
Indicata the amount *f user check testin8 of reinforcing steel for strength and ductility to be accomplished. Include the statiseteal basis for the program and the basis for reinforcing steel shipment rejection.
2.
Indicata the attention that will be given to cadweld splice quality control to include operator qualification and procedural r -
quirements.
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i 3.
Tadie=es the rainforcing bar welding procedures and quality control to be used in perfomina reinforcing bar strength valda. Include bar preparation, user check tasting of reinfore-l ing steel composition,
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pe:naissible alloy specifications, temperature control provisions, radiographic and strength tasting rectirments, and the basis for welded splice rejection and cut-out.
.. un.r 1.
Provide the general sequence of liner construction and testing in r=1=e4 " ta to the backing structural concrete constructics.
j 2.
T=dteme= the liner plats dhaensional construction controls to be amployed for liner plate out-of-r==dness.
3.
Y=diente the estemt of user check tasting of liner NUI properties, liner thickness, ductility, weldability, etc.
4.
Tadir#m the applicabla ASE or AFI coda sections that will be adhered to in liner construction.
5.
T=d**=ea the pensedares and criteria for control of sean weld p*E0*ity.
6.
Tadiesen the requirements for and the control that will be placed en seen veld ductility.
7.
Provide the quality control pWms for liner angle and stud welding.
i 8
Provida your quality camemi procedures and standards for field walding of liner plate to include welder qualifications, weldin;;
j ps-x EN.e, poet veld heat treatment, visual inspection, magnetic particle inspeetten, liquid penetrant inspection, radiographic taspectime, and construction records.
i E.
Prestressian treten 1.
T=diente the basis for the wire /buttoahand factory quality control j
requirements imposed to tasure production material imeeting desi,;t i
requiremsats and specifications. Where a systama other than B3W is speci %sd, provide these requirements.
2.
Prweide the corrosion protection provisions that will be given to wire / strand at the factory, through transportation, and in the structure prior to prastressing.
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Indicata the corrosion protection attention that will be given to the *=adaa ducting.
4.
Provide a description of the prostressing segnane=, procedures and tsados stress verificatica ther will be employed.
5.
Provide the grosting preaadures and controls that assure proper tendon grouting.
F.
prosperational Testina 1.
Provise, in detail, the==naar and extant to which all valving will be tested for leektiabtness both individually and during prosperational integrated leak testing.
2.
Provide as anlysis of crac!s size, spesing, and pattern expected during the eenev h t preoperatismal structural test.
G.
Ioservice Surve111 ansa 1.
Describe the surveillamos capdilities provided by the contaiment desism to fetilitata portadic inspection of the steel liner, and maattering and/or pariadis structural testing of the eaarmi-c.
Since leek-rate testing is intended to be perfemmed at reduced passauro, psevide a avaluatioet of the minimum inval of such taats that would also serve to verify conciamed structural integrity.
Consider in the eval==eia= structural response and installed sur-veillance instzusesreina requirements.
2.
T=dia=ea the estant of long-term structural surveillance to be provided by test samples and ta-place instnameneurian of the con-tainamat.
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