ML19309E240

Requests Revision to Certificate of Compliance 6717 for Model 6717B Deleting References to Use of Asbestos as Thermal Insulator in Package Design.Requests That Words Asbestos Free,Appear in Description Paragraph

ML19309E240
Person / Time
Site:	07106717
Issue date:	02/26/1980
From:	Richardson H GAMMA INDUSTRIES, INC.
To:	Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
Shared Package
ML19309E241	List: ML19309E240 ML19309E247
References
15627, NUDOCS 8004210037
Download: ML19309E240 (7)

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February 26, 1980

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\\CH U. S. Nuclear Regulatory Commisrion Transportation Branch Directorate of Licensing Washington, D. C. 20545 ATTENTION:

Charles E. MacDonald, Chief

Dear Mr. MacDonald:

Gamma Industries hereby applies for a revision on Certificate of Compliance USA 167171B.

This revision is a deletion of references to the use of asbestos as a thermal insulator in the package design and replaces the word asbestos with, " thermal insulation",

throughout the application.

We specifically request that the words, asbestos free, appear in the descrip-i tion paragraph of the Certificate of Compliance.

The original application for this certificate contains the specification data for Johns-Manville's Thermo 12 Pipe and Block Insulation with MIL-1-2781 specifications for the pipe and MIL-1-2819 for the block.

This data and the supporting thermal evaluation contained in that application should technically support this revision request.

Thank you for your prompt attention to this request.

Jours truly, GANA INDUSTRIES Applica nt...............,,,,,

Che:%110.VJ 37 Am a un tlic e Cab $bo'!y'.5? ' ' '[,I,'

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Typa cf Fes.aw#+et)

Har

. Richardson Data Check Rec'd.

Radiation Safety Officer Receiva:1 By...g.Fo,

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Enclosure:

Revisions to 67171B Application PROGRESS THROUGH INNOVATION 8004220g [

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INSTRUCTIONS FOR INCORPORATING REVISION Z PF'DMINTS

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TO APPLICATION DATED JUNE 20, 1975

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a liner of molded themal insulation such as Johns.

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Manville Thermo-12 or equivalent),1" on top and

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a bottom and 1-1/2" on sides. A molded polyurethane:

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filler'is provided between the thermal insulation,

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and radiography device to position and secure thel

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device withi.n' the drum. ; ' general arrangement of',

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p the pro'tective 'overpack appears in Appendix 1.10.6.

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. rt The Model 67'17-B byerpack' as described above is.,

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the posAtioning of the radiographic device inside.

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There have been no structural changes. In the

[d Model 6717-B, the radiography device may be

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the maximum amount of protection to all portions e

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. of the d'evice in tems of the thickness of thermal.

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! 'I3.,j insulation and polyurethane foam available from

,y the overpack. Because of the protruding lock boxes

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on some cameras, it may be necessary to orient these protrusions about 30 from the horizontal and-consequently position the entire device on its side. '

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In some cases, such as with the "P1peliner" model,

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l vertical orientation.

The capability of the overpack to withstand the conditions set forth in Subpart C of 10 CFR 71 will be explained in Section 1.0 below.

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'.l..C?ACI~a2 LT1*.?JCION (10 CTR 1.23)

- I M ST3UCTURAL DESIGS 1.1.1 Dise- = n

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4 The principal ss&--n-C membs:s and syste=s 1: the Madel 5717-B package

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are: (1) the p::inzp +

- -t vessel co===f-ing the sealed sour'ce of 192 Iridium: whi::me s the definition of special for:t material as defined in 10' CFA I 4 Tr):; C2) the secondary contai:xmer= vessel which is the radiogr zphi: lier"-= used :n hold the sealed s:c:rce in place and provide the neezesar:y *'*1Nr; (3) the insu'ated sinippi=g container or overpack wirth is 20 ga. c:cer and bolt ring posirdve :losure device.

Impact limiter s ar "w-tporated into.the everpack z=if % ude the outer steel drum, thee,--W

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and the moldedd pal'= e n=ne *'7'er between the asbes as a=5 the radio-graphic devices.c.'Te abure corpo:ents are identified on rza drawings in Appendix 1.10.55 azu 21D.E. racy work together to s*Hsfy the standards set forth in Sinbpz:I.:f.10 C:E2 71.

A detailed discussirs of tl$e structural

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design and perfin-'-== these components vill be p.svided below.

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The main purposse.:d he :me ns:h is; o pro e:t.:he radisp sphy device from the hypothetic:a1 z=ider: conditions. The two significaz= areas of concern are the 30 f c..

d o::and _he 21-75'F thermal exp:sure. Traz the attached drawings it caen he neen chat :ypical units are small ds s5=e and ruggedly constructed. IDamaei resul d_nr from a drop could have da--'- ental effects only in locali: red =eas. -(i.e lock box, etc.).

For _his reason, each j

unit is secure 117 hEdi #_fhit _he everpack hy 2 s=ug fir-d r rigid polyurethane Y

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.A data sheet is attached in Appendix 1.10. 8 and represents a typical material currently used throughout the industry for pipe insulation. Both mechanical and thermal properties can be found there.

J Rigid polyurethane foam is currently supplied by a number of vendors.

The cast-in-place foam should have a density of 4 to 6 pcf and be of a self extinguishing variety such as Polymir CFO-6SE.. Typical mechanical properties are as follows:

Density 4 pcf Compressive strength 120 psi 2

Thermal conductivity K=.15 (Btu)(in. )(Hr)(Ft )(OF) 1.4 Genera'l Standards for All'Isackages (Ib CFR 71. 31)

1. 4.1 Chemical and Galvan Reactions

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The Materials from which the package is fabricated (steel, insulation, polyurethane foam), along with the contents of the package (steel, lead or depleted uranium) will not cause significant chemical, galvanic, or other reaction among the packaging components, or between the packaging com-ponents and the package contents.

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1. 4. 2 Positive Cicsure The positive closure system consists of a 20 ga. cover secured to the 10 i

gallon drum by means of standard 18 ga. bolt ring. Tests on this package to simulate Type B accident conditions have shown this type of closure to be equal to or better than the clamp ring type used on the Model 6717 package (Refer to Section 1. 7 below). In addition, a lead and wire crimp seal will be used in conjunction with the bolt ring to prevent inadvertent and un-detected opening.

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1. 5. 2 Extc: =a'. ~3res sure l

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Since the sealedi s _ _e tse25 is special form materia.1, = vill withstand much greater p2rew-- es f=an the 25 psig. The overpack:s vented to j

the outside and' the==fere re2. eves a.ny pressure build =p ~~_at may occur.

Therefore, it its cr--WE tlat.here would be no loss of :entents if the ModeJ. 6717-B ;nar.isge we Inbjected to an external prersnre of 25 psig.

M ' Err *m1'Cc=ditions of Transpe-t The model 67177-3 a=hz.ge hts been designed and constru-ted, and the contents are scnP n -d gas de: scribed in Section 0. 2. L(b) above) that the performance rp-ents specified in 10 CFR 7I.35 aill be met l

when the packag;e is stibrented to the normal conditions of transport specified in App-~ - A :zi 10 CFR 71. The ability of the Model 6717-B r

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package to satissfaccrfy withstand the normal conditi.c:ss =f transport has been assessied :s described below.

1.6.1 Heat-Construction mmterals ri:he packnge, including the i=ne radiographic device (steel shell==rel ping diepleted uranium), the com:- ment vessel (sealed capsule <.of.5' Ir_:dium i= Special Form) and the omrpack can be subjected to higiberm.a atures than those normally assxiated with i

transport condit:ionr wifnont significant detrimental effect. The thermal and polyurethane io.25.:ci han proven acceptable for T pe 3 thermal I

3 conditions which. s- - =rde be envircamental heat coc.ditems. All material can operate satitsfa=srCy at temperatures exceeding ISD F.

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1.6.2 Cold Materials of comc-M"- for :he packaging, the inner rafiographic device, and the sealed cmps:fa 2 252 Iridium are not significar:23 affected by the l

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GAMMA INDUSTRIES J

MO DEL 6717-B, PACK AGE

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