ML20045E210

Responds to NRC 930517 Ltr Requesting Addl Info Re Ampacity Derating Factors for Cables Wrapped w/Thermo-Lag 330-1 & Fire Endurance Schedule. Engineering Rept on Ampacity Test for 600 Volt...Cables Installed in 5 Ft Length..., Encl

ML20045E210
Person / Time
Site:	Oyster Creek
Issue date:	06/23/1993
From:	J. J. Barton GENERAL PUBLIC UTILITIES CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20045E211	List: ML20045E210 ML20045E258
References
C321-93-2175, GL-92-08, GL-92-8, NUDOCS 9307010255
Download: ML20045E210 (11)

Text

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201 263-6500' TELEX 136-482 Writer's Direct Dial Number:

C321'93-2175 June 23, 1993 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:

Subject:

Oyster Creek Nuclear-Generating Station Docket No. 50-219 Response to NRC Request for Further Information Concerning Thermo-Lag 330-1 Fire Barriers Ref: (1) GPUN Letter C321-93-2095 from John J. Barton to NRC Document Control Desk, dated April 15, 1993.

(2) NRC Letter from Alexander W. Dromerick to John.J. Barton, dated May 17, 1993.

GPUN responded to NRC Generic Letter 92-08, "Thermo-Lag 330-1 Fire Barriers",.

by letter dated April 15, 1993 (Reference '). NRC letter dated May 17, 1993; (Reference 2) requested additional infot : <cson concerning ampacity derating factors for cables wrapped with Thermo-Lag 330-1 and our. schedule for fire endurance testing of unique Thermo-Lag 330-1 configurations at Oyster Creek.

Our response is provided below.

1. Reauest:

Provide a copy of the TSI Brochure 7.14 and other related documentation which would assist in the identification of the TSI test report (s) used as a technical basis for the ampacity derating values 7.3% (1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> fire barrier) and 10.3% (3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> fire barrier) for cables in conduit enclosed by Thermo-Lag 330-1 material.

Response

The following documents are attached:

• TSI Brochure 7.14, " Fire Resistive and Fire Retardant Subliming Coating Systems ( Attachment A).

• TSI Technical Note 111781, " Engineering Report on Ampacity Test for 600. Volt Power Cables Installed in a Five' Foot Length of Two-Inch Conduit Protected With Thermo-Lag 330-1 Subliming Coating.

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UPU Nuclear is a part of the General Public Utilities System J

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• ITL Report No. 84-10-5, " Engineering Report on an Ampacity Test for 600 Volt Power Cables Installed in a Five Foot length of Two Inch Conduit Protected with a Three Hour Fire Rated Design of_the Thermo-Lag 330 Fire Barrier System", October 1984 (Attachment C, Page 12, Paragraph 6.0).

As stated in our April 15, 1993 letter, neither.GPUN no'r our contractor who performed the ampacity derating calculations for Oyster Creek specific configurations formally reviewed tested configurations for comparison. Our contractor incorporated the 8% derating factor for one hour conduit fire barriers and the 11% derating factor for three hour conduit fire barriers as specified in the TSI brochure, along with conduit fill factors (number of cables) and ambient temperature adjustment factors.

Although no formal configuration comparison was performed, TSI Technical Note 111781 (Attachment B) and ITL Report No. 84-10-5 (Attachment C).was considered to be adequate technical basis for the 8% and 11% derating factors used. TSI Technical Note 111781 documents the results of a test performed on three lengths of 600 volt #00 AWG power cable installed in a 2 inch diameter rigid steel conduit protected with a one hour fire rated Thermo-Lag 330-1 barrier and concludes the derating factor is 7.47%. ITL Report No. 84-10-5 documents the results of a test-performed on a similar configuration with a three hour fire rated Thermo-Lag 330-1 barrier and concludes the derating factor is 9.72%. '

It is now understood, from information provided in Generic Letter 92-08 and related Information Notices, that Thermo-Lag 330-1 ampacity derating test results documented by TSI and ITL are inconsistent and that application of a test result to a particular plant design requires a detailed review of the test article configuration.

The NUMARC program, as discussed in our previous letter, is intended to provide generic ampacity testing and information necessary to define the appropriate course of action to resolve this issue. The specific test schedules are to be provided to the NRC by NUMARC.

2. Reauest:

Please state what industry standard (e.g., IPCEA, NEMA) is applicable in the ampacity determination for cables in conduit at Oyster Creek.

Response

The National Electrical Code (1984 Edition) was used to determine the ampacity and circuit adequacy of new and existing cables in conduit wrapped with Thermo-Lag 330-1 fire barriers when the fire barriers were installed to meet 10 CFR 50 Appendix R requirements.

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3. Reauest:

Provide a schedule for site specific fire endurance testing of the plant specific or unique configurations that are not bounded by the NUMARC test program and the implementation of any potential barrier upgrades resulting from this testing.

Response

The cor'igurations to be tested in the NUMARC program have not yet been estabi'shed, therefore the requested information cannot be provided at this ' ime. GPUN will monitor the progress of the NUMARC test program and r" ovide the requested information at the earliest opportunity.

If there .re any further questions, please call Mr. Paul Czaya, Oyster Creek Licensint Manager, at (609) 971-4643.

Sincerely, W }Q_ >

0 Vice President & Director Oyster Creek Attachments cc: Administrator, NRC Region 1 NRC Resident Inspector Oyster Creek NRC Project Manager

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t, THERMO-LAG is a trademark tot a line '/ .! Therrno4cg provides more fire protec-potented subliming heat blocking and fire } y_-@ s3N tion than any other fireproofing at a retardant compounds manutoctured of comparable inickness!

Thermol Science. Inc (TSil. St Louis, Missou- k M i that have been used extensively for the fue .

protection of steel. oluminum. magnesiurn composites. Otostics power. control and ir, M*~ D$ w strumentation cables. stationary tanks. ove, e gfy?Wp**._a ,

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Composite. plastic and melot surfoces of o e hos been tested and is uf ed for the protected. speeds installation and lowers thsCkness Commensurate with the degree of protection of Cryogenic (LNG) tanks from insto!Iotion cost tire intensity. duration oria degree of protec- thermal shock and the fire p afection of tion reouired Multiple hour fire ratings con steel reinforced concrete. e is delivered ready for use: ehminates ex-be provided as determined by tests utilizin9 e hos been tested in engulfing onc torch- tro. and costly on-site mixing operations j the ASTM Ei19 time, temperature environ- ing fire environments and is approved by e con be opphed in the fobncoting shop

, ment. high intensity hydrocorbon or other use by the U S Department of Tronsporto. for greater cost and scheduling efficiency, specified fire environments 1:on. Comphes with N F PA Rule 58 standards cures to a hard tough protective tintsh that f r pr tection of LPG gas storage tanks withstands obus!ve handling and Job-site dhe THERMO-LAG 330 Subhming Mote- erection.

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, other laboratories in accorconce witn ASTM mentation cables. ccDie troys. conduits and stoliction. Trowel or roller finishing con be Eii9 to provide code and insurance speci- miscellaneous related entities by the Amer. done it plaster-smooth or orchitecturolly de-i j fied fire resistive construction designs icon Nuclear Insurers. Nuclear Regulatory signed surfaces are desired 9 hos been tested in hign intensity fre ex. Commission, numerous utilities and archi- e DOT FRA Report No 45; sueonzes Of i posures for use in refinenes, chemicot tectural and design firms. e various systems 'esfec. CC NERMO LAG l

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cellulostic and hyorocorDon fire conditions. meet the most demanding extenor condi~ THERMO-LAG 351 SERIES PRIMERS 1 e is classified by the Undetwriters Lobo- I'ons . . from Alaska to the Arabian desert, is These ore highly etticient corrosion inhibiting ]

rotones. Inc. (USA). Lloyd s of London. the U.S. classified by the Underwnters Laboratones os on extenor and intenor matenot system. c e r e '

Department of ironsportation and others for e]s w extenor use When installed as directed, e con be trowelled. rolled or sproyed with the THERMO-LAG 3301 Subliming Motenal.

3 otters excellent conosion inhibition Very low conventional equipment and is water-permeabihty - highly resistant to many reducible until cured. to simphty clean up THERMO4AG 350 SERIES TOPCOATS ,

chemicals operations. Available in the form of pretobn- Inese matenols provide excetient protec-e es opproved by state county, municipal. coted panels, split sleeve and other custom- hon against water flow, chmotic extremes. '

and corporo*e building otticiots fire mor. ized configuratons chemical attock and abuse they are also shots; fire safety and loss prevention engi- O minimal coating thickness possible thus used to provide o smootn. cesthetic finish neers. Fire tests by maior petrochemical allowing oesthetically desirable orchitectu. coat to the THERMO4AG 330-1 Subbming makers have confirmed its capability to rol expression of the steel shapes to be fire Motenal.

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T GENERATING INDUSTRY The one and inree nour fire roted THERMO. e is essentially enemically inert it has neg- e is extremely versatile. ond Tncy be used 1 LAG 330 Fire borner System have been cuch bgible chtoride content. and should not for many fire borner protective pu poses. in ified by tests for use for the sote hot snut- atteet stainiess steel oddition to raceway protection such as norv down" of entico! components in nucieor tood beanng portitions, protection of instru-e is woier cased. and contains no osbestos ond fossil power generating plants fibers it ts not expected to pose ony en-ments. ond volves.

Both the one and tnree hour THERMO-LAG vironmentos problems to personnel or e is resistont to gommo radiation. THERMO-330 fire borners are funy ouchbed by tne equipment it will not introduce potentroi LAG hos been tested to exposure of 2x108 Amencon Nuclear insurers (ANQ ond the maintenance proNems for motors or HVAC Rods.

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Fire Barrier is compnsed of a one inch Junction Boxes

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" *'nal cry fum thickness and tne one hout The one and three hour THERMO-LAG 330 Penetration Seals Fire Barner System rated THERMO-LAG 330 Fire Borner is com.

pnsed of a one-hoff inch nominal dry film Structural 5upports thickness inis is porttcularly benehcial to FHe Stop e have been tested for ompacity deroting.

toCeway systems since THERMO-LAG borners Fire Borner Non-Load Beanng Wolis when oppheo to eteCinCo! CODie troys and Electncoi Devices and Eaupment

< condurt ine derating voiues of circo 10 will not reouce oisie space measurably or

• percent tone hour barrier) and circa 18 the space netween troys instrumentohon Decces percent (tnree hour corner) are extremeN e is easiry remcved from protecteo ecutp-low votues and provice the obihty to retro-ftt ment for occess or to puu odditional cobies THERMO~ LAG to power cable raceways U

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, o THERMO-LAG's low weight hos minimum vtded THERMO-LAG borners con be cut and INSTALLATION ettect on hongers and raceway systems This repaired by a testedcapproved procedure THERMO-LAG is omckly instaited by unskilled feature makes THERMO-LAG porticularly a hos been seismicony auchhed to SSE croMsmen wno con be trained by TSI The suited to retro-fit opphCotions in operating motenol con be instoned by means of pre-j or near operationc! nuc6ect and fossd accetefottons up to 75 gs tobricated ponett preshooed conduit sec-plants e has a minimum ettect on previously sers- tions. solti sleeves. etc which are scored O is readdy instolied by vanous metnoos micolly ouo:ihed equipment. since it does and contoured to fit most ecutoment it con such as sprov. trowet or roller it con o!so be not opprecfably change the natural fre- otso be opphed by air spray methods of d

installed as o'etabncated panels and pre. Cuency of raceway systems due to its low hand trowel Prefabncoted of preformed shaped conoui! sections The versotdity of weight- insto!Iotion formats are Quicker, cleaner and instolhng THERMO LAG by different metnodi e con be provided to any recurred Quchty borner thickness ouolity control is factory provides construction monogement with Assurance 6evel. I e4 up to Quakty Class i TSI controlled However, in-place spray installo.

ophons, which con be best suited to the hos o completed QA program for nuclear, hon is otso acceptcble. and will generolly

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include THERMO LAG 220 Senes. THERMO- custom mode colors LAG 226 Senes THERMO-LAG 227 Senes and protection cd TV cocinet componets feer-THERMO LAG 220 FCR FIRE RCTEC!;CN 1 THERMO-LAG 270 Senes motenols inese MO-LAG 226Z nos o!so been tested oy tne I materiots have been fire tested by the CF TV COMPONENTS lhes is o one component. porn 1bke matenci

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Underwnrers locorotones and are bsted as e es Geneofed m M N W1 W

! recognized fire retardant coating matenols. which con be oppiled to wood. polystyrene. cmmobility of Plastic Motenals: ASTM D256 THERMO LAG 220 is approved by Factory Mutual Reseo*cn Corporotron as o fire re-pressed board and hordboord suDstrates it is used by the TV industry for the fire protec-

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LAG 270 is coprovec by Factory Mutuot THERMO-LAG 220-t has been tested by tne g s Resitarch Corporot:on as o fire retardant for Underwnters tocoratories in accord witn procedures dehnected in UL 94 -Tests for it is otso ovonooie in o number of custom  :

protection of single or grouped eiectncol mooe colors Flammoointy of Piastic Motenois ASTM D256 I

coDies " Test Metnod for impact Resistance of Pics-The THERMO-LAG tomay of fire retordant tics and Eiectncot insulohng Motenots: and THERMO-LAG 227 CLEAR l mofenots were demoned to retard flame spread. reduce tuei contnbution and ASTM D257 " Test Metnod for D C Resistance THERMO-LAG 227 is o one component soi-snae. and ceiov ignition of comoustible and Conductcoce of insulohon Motenois: vent Dosed clear' fire retoroont matenot l matenots wnen exposeo to fire This morenal is recognized for use by the which is o!so apphed to Combustible sur- l

- Specific members of tnrs famity of matenols Underwnters Locororones in oil colors faces sucn as wood, ponehng. etc The ]

matenot hos been tested ono is hsted by the '

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cordboard composites. otostics plashc THERMO LAG 226 underwnters Laboratones os c Class N Fire foams. os weil as power control and instru. THERMO. LAG 226 Fire Retardant Motenot is o Retardant Cochng  !

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' thol is copned to combustiDie surf aces such THEpO-LAG 270 FC;R PROTECT;ON CF l Specinc orecs 0+ occhcotion for specific os wooo evrene et: This matenot nos eCoR .iROL nND INSTRUMENTA-procucts inciuoed ottsnore platforms. in. ilON CABLE.

custnoi instadonons noreis hospilots oport, been and is CurrerJY be!ng used by many  ;

i of the iecomg teievision manutocturers for THERMO LAG 270 is o one component. water )

ment buildings schools. convenhon centers. based pointhe motenol which is oppned to I the fire protection of television cabinet i restaurants museums corones, by the teiev,. combustible surtoces of power control and

' components it has otso been tested and s:on industry and tactory oppbed pre. instrumentonon cooles. This product has 0nished woooen and syntnehe matenots of listed by tne Underwnters Laborotones os o

" Class N Fire Retardant Cocting THERMO. been tested by f actory Mutual Research construchon LAG 226 has otso been tested by the Corporation onc is approved by them os o

, The THERMO LAG Fire Retardant Motenors M M m oC W M W @M D PMW d sQe &

have offractive finisnes These matenots are #0 U#*' U" *#* '" * *#8 U' " * *C '

opphed by scrowng roihno brusning cur- -

Flammoo#v of Ploshc Materio!s: ASTM D256 to:n or toner coonng " Test Metnod For impact Resistance of Plos- THERMO-LAG 290 THERMO. LAG 220 tics ono Etectncol Insutonng Motenoist ond THERMO LAG 290 Subuming Cooting is o one THERMO-LAG 2 O f ae Reictdont Motenolis o ASTM C257 -Test Metnod For D C Res:sfonce component. water based fire resistive one component water Dosed pointhke ed Conouctance of Insulation Materiots- motenol whicn con be useo ettectively on l comoustible suostrates it is opphed to such

- motenai that 6 oppneo to combushbie tur. THERMO LAG 22$ is c:so ovonob:e in a num-ber of custom moce colors surf aces as low censity. polyurethane toom faces such as wooo corocoord etc This

. p?ocuct was testeo Dv ine Underwnters insulation (PUF) instofled on refngerated con-Locorofones per ASTM E84 procecures and NEWOGG 226-2 FOR ERE :DOTEC- toinment vesseis environmental borners. etc.

j is bsteo by them os o C! ass N hre retardant 7CN OF W COMPONENTS The THERMO-LAG 290 Subuming Materiot hos a coating it nos a:so been tested and is This is o one compon.ent, po:nthme. fire re- been tested by Thorton Research Centre in approved oy f actory Mutuot Resecren Cor- tordant morenal wnich is oppbed to poly- the United Kingdom for the protection of 4

pcro ion as a f e fe'c cont coot:ng for styrene pressocord. hardboard, etc. It is polyurethane toom insulation.

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TYPE TEST OF FIRE THICENESS TEST TION BACKSIDE Denstry dry cuto 78 les'td (PretoDhcoted)

ITE2 SIMULATION (Inches) 1.ABORATORY EXTENT TEMPERATURE cuco 82 tes/ft'(Spipyed)

For Protection of Cable Troys, Conduits, Junction Boxes Free Fall Cables, Pullboxes, Condulet: Water Dosed one Cogiponent Cobte Troys. ASTM E119 0.500 Soumwest Reseorch 1 Hour Maximum Backstoe Tempercture Juncien Boxes. Less Thon 325F. Test incluoed Tensite Strengm RT @ 06F)=cuco 800 PSI Free F6J Cobies. 0.500 Leodmg insumnce 1 Hour Water imprngement After Fire Pullbonis. Onented Test lod. Exposure ano contmuous Shear Strengih RT @ G5F)=circo 1100 PSI Conculets, enefgtzmg and recoromg of Supports 1.000 Leodmg insumnce 3 Hours electncol connnuity and locg Fierumt Sttftness fri @ OSF)=cuco 85 K$1 Onenrea lest Lab. of te & cotde to ground F M . RT @ Me M PS Fes Wolts ( ASTM E119 1.000 Leodmg insumnce 3 Hours Max; mum Backside temperature Bond Strength RT @ GSF)4cuco 575 PSI Onerited 1sst Lab. Less Thon 325F.

Penetmhon ASTM E119 3.000 Leadmg insuronce 3 Hours Maximum Bocssace Temperature in k M uWs G5F)=cuco M PN ,

Set.2 Onented Test Lob. Less inon 325F. Thermal (unfired lull cured) .

Structural Steel:

Uncerwmers Conducitytty RT 0.1 Blu/hr it F/ft 14WF228 ASTM E119 0.500 3 Hours Extenor Design 1611 toDorotones 14WF220 ASTM E119 0.205 Motor Insurance 3 Hours Only One Fionged Exoosed Fire Tesung to Fue-Rnenforced Wrm .

LcDeratory 1 Lover o11.8 cryd 2 AMPACITY DJRATJNO of Fiberglass Namng Ampocity cemhng tests and anotyss vers performed in Maximum Fionge accorconce wim IPCEA/ NEMA Puteconon Number P 54-Temperomm 5W

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• 440 (Second Edition) and NEMA Pubhcotton No WO51-14WF228 ASTM E119 0250 Onoerwnters 2 Hours. Extenor Design 1610 1975. to 6erermme cod 6e pose cmpoesty. The tohowmg LcDomtones 7 Mm' resutts were octomed for 40 percent noodmg (100%

10WF49 ASTM E119 0.217 kolor insurance 2 Hours. Romforced With 1 Layer visual): ,,

Fire leshng 8 Mm. . of 18 cz/yd' Fibergross one Hour THEBMO4AG 330 fire Somer

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1roy cuco 12.5 Percent Derotmg caco 7.3 Portent Derotmg .

8WF39 ASTM E119 0.250 Mo or in mace H ut Max m Temperature Condu.it Hour THERMO-L4G 330 Fue homer Laboratory imy circa 17.7 Percer:1 Desting '

5WF18.9 ASTM E119 0.250 Motor Ir surance 1 Hour. Maximum lempemture Conduit caco 10.3 Percent Deronng 5 Fue 1estmg 45 Mm. to 1100F Lanomtory 4*x3*x W ASTM E119 0.250 Motor insurance 1 Hour. Maximum fomperature .

Squors Tube Fueleshng 34 M;n. to 1100F a 14W"228 ASTM E119 0 156 Ln ers 1 Hour. Extenor Design No. X609 RADIAT10 . E

_f LoDomtones 17 Mm. 2.12 x 10' Rods 1o:o140 year meegmted dose Tor.ks & Tonk Cors; After Irrodmhon po degrodotion in fee feststive properties, Steel Plates-%" Thich wrien tested in accord wlm ASTM E119 thre ssmulation.

Engulhng 0.165 DOT /FRA Aberoeen 100 800F HyorocorDon Provmg Ground Mmutes Torchmg 0.165 DOTTRA ADerdeen 30 800F .

Hydrocarbon Provir.g Gmund Mmutes 4 Sondw*ch Ptotes-%" Steel + 2" Polyuremone Foom + Y Steel ASTM E84 TESTING F0WlyERMO-LAG 330-1 Enguitmg 0125 D01'FRA ADerceen 100 800F SUBLIMING MATERIAL Hyorocarbon Proving Ground Mmutes Fiome Spread Rotmg 5 Engulfmg 0.188 DOT!FRA Aberoeen 100 550F , Fuel Contnputed Rotmg 0 Hyorocarbon Proving Ground Mmutes . We Devemped Rohng 15 Torchmg 0125 DOT'FRA ADemeen 30 550F ,

Hyorocarbon Provmg Ground Mmutes J.-

Sonowich Plates-Y Steel + 2" Fiberglass + Y Steel Engutfmg 0.125 DOTIFRA ADerosen 100 800t HyorocorDon Provmg Ground Mmutes lorchmg 0125 DOT'FRA ADefoenn 30 800F CHEMf0AL AND ENVIRONMENTAL RESISTANCE Hyorocorbon Proving Ground Mmutes THERMO LAG 330-1 Subimng Motenal System hos been Steet Ptotes-%" Ttuch subtected to many chemicals fohowed by exposure to on Torchmo 0.218 D0f fRA Aberceen 50 800F 1800F ftome source alth no adverse ettacts:

HyorocorDon Provmg Ground Nmutes e For specific motenols and details contact the monutoc-Wim Woler g When tested m accorconce with US Fecemt lest standard THERMO-LAG 220. 22f.. Atc M7 MATElutd5 1410. Memod 6152. which mcludes esposure io o weom-Hre Hazard Classificat on erometer. elevated tempemtures, mermal and humidtry THERMO-LAG Suchmmg Fue Resistive end Retoraant Notenots have ochieved outstondmg Class A fue tiozord classificottons cyctmg. tonowed by exposure to e llre swnulation of cuco wfien tJsted by Unoerwnters Laborotones m occordance wim ASIM E-84 procedures 1800F home source. tios shown that the fue resistive R: port

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The exposure ifGed 4 724 hours0.00838 days <br />0.201 hours <br />0.0012 weeks <br />2.75482e-4 months <br /> wtisch in accordorice tmoerwriters Laboratones. Inc Fine No. #6952

" Report On Cochngs. Fire Reforoont- (THERMO-LAG 220-1. 226 ond 227) *'th generally accepted snoords a equivalent to a 40 Test Results:

TYPE 220 TYPE 220 , TYPE 220 l TYPE 226 I TYPE 227 Ground by the U.S. Army wtrcti consist of exposmg Douglas Dougios Corrugated Dougtes Douglas Dougios Dougios motenots to me most crthcon er.vironments envisioned by Surface Fir Fir FinerDoord Fw Fu Fir Far

, me Army THERMO-LAG 330' Sutemmg Metenol possed Flame spread 10 25 15 5 20 25 25 wtm excehent results.

Fuel Contnouted 5 5 0 10 10 15 0 Smolte Developed 0 30 30 . 20 20 10-45 40 The test prog'cm otso mcluded simulated impacts of a humder Of Prehmmary Coots None None None 'None None None None tree follmg 10.000 pound weight. cropped trorn vanous Rote per coof (Ft6Gotion) - - -. +- - - - heights on THERMO-LAG 330-1 coated test plates, with-4:umpet of fue retaroont coats 2 2 , 2 2 2 out any coverse ettests.

Rote per coot (Ft^Goiton) 300 4002 _ 300 300 400 300 CLASSIFIED By THE UNDERWRITER LA8 ORATORIES Rot per c ( Gohon) (U S-) AS AN EX1ERIOR GRADE MATERIAL SYSTEM. ]

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TYPICAL USERS

' tennessee Wiley Authorrty Demun School 4 Mobil Oil Co Southwestem Bell Te6ephone

• RCA Corporation Texas Eastman Bohomas 0:1 Rennery frovetooge Zenith Co'Dorotron Union Oil Ponosonic Corooration Jefferson Chemical Co Pennsylvania Power & bgnt Co. Genero Amencon ironsportation Hyatt Regency Hotel Company Union Electric Co Wostungton Public Power Supply Amoco System lNC* Arabian Oil Co.

Ashlond Oil Bnhsh Petroleum Butono-Spain Berwind Rairwoy Service Co.

Philodelphia Electnc Co. ,

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Houston Museum of Fine Arts Bendia Corporation l

ST. LOUIS, MO 63026 ll=: 2.a" e m' ""~-  ; , U,,,,,ies Gene,,,,,,,

Granite City Hegn hool Company h Carolino Eastman Co. General Public Utilities Nuclear a d) Dow Bodiscne Shell Oil Co.

Corporation Iowo Electnc Power & bght a

4 Shell E.xploration & Production Company l Philadelonio Gos Works Southwest Gos Company l Bechtel Power Corporation Watt Disney World l

,. .g, . Anzona Power & bght Co. Comrnonwealth Edison  ;

4 4 Aftonto Gos & bgro Company Phattips Petroleum i *

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Aftontic Richheks Company Amencon Bnogo Drvision of U.S.

Steel Corporation

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Anheuser Busch. Inc.

.- Cutter. Hover-Locknort Petrotone

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