ML20058C624

Requests Addition of 5.25-inch Width of Model 660 a to Certificate of Compliance 9033,described in Drawing 66030

ML20058C624
Person / Time
Site:	07109033
Issue date:	10/26/1990
From:	Roughan C AMERSHAM CORP.
To:	Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
Shared Package
ML20058C627	List: ML20058C624 ML20261B744
References
NUDOCS 9011020060
Download: ML20058C624 (2)

Text

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i Anersham Corporation

'40 Nortti Avenue Burhngton, Massachusetts 01803 f

Telephone (617) 272 2000

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26 October 1990 Mr. Charles E. MacDonald, Chief Transportation Branch l

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Division of Safeguards and Transportation, NMSS l

U.S. Nuclear Regulatory Commission OWFN, 4E4 Washington, D.C.

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.i RE:

Docket Number 71-9033

Dear Mr. MacDonald:

We have received USNRC Certificate of Compliance Number 9033 f

issued for the Model 660 family of exposure-devices and Type B(U) packages.

j As agreed in telephone conversations with M. Garcia, the " narrow body" (width of 4.7 inches) 660 A described in drawing number 66030 would not be included on this certificate until we demon-strated that it meets Type B(U) requirements.

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t However, the 5.25 inch width of the Model 660 A was to have been included in the certificate as described in drawing _ number 66030.

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This was inadvertently omitted from the certificate.

We *cquest that this be corrected as soon as possible.

In our initial application dated 8 November 1974 for approval of i

the 660 as a type B(U) package, the testing was performed on a

" narrow body" 660.

This is referenced-in the general introduc-tion to the original application.

I have included a copy of i

this, which references the dimension of 4.7 inches for a width, i

Also, all the photograph:1 and test reports in'the original appli-cation show the narrow bcdy version of the 660. lI've enclosed a copy of one of the referenced drawing C66001-14 in the applica-

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tion dated 8 November 1974.

The drawing indicates a width-of 4.7 inches.

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28A' !88e? 8918 h Amersham e

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Docket Number 71-9033 Page 2 of 2 h

Based on this information, we request that the 660 A model, as described in drawing number 66030, be approved for transportation on Certificate number 9033 with no restrictions.

If you require further clarification on the narrow body, please contact me.

f Sincerely, htphtrv/I? kON OR/

Cathleen M. Roughan Radiation Safety Officer 7

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November 8, 1974 1

Mr. Charles E. MacDonald, Chief Transportation Branch 1

Directorate of Licensing United States Atomic Energy Commlusion Washington, D.C. 20545

Dear Mr. MacDonald:

Enclosed are data and drawings describing the Tech / Ops Models 660 and 660E Camma Ray Projectors.

We ask that you review these data and drawings for acceptability of these projectors as a Type B Shipping Contains r for Special Form Radiographic Sources, and we request the issuance of a Certificate of Coinpliance for these devices.

The Models 660 and 660E projectors us.c the Tech / Ops Model A424-9 Source Assetrily, which has previously been described to your office in f

conj.netton with the Tech / Ops.Models 741, 684, and 650.

The Models 660 and 660E Camma Ray Projectora have previously been deemed acceptable for licensing by the Materials Branch Directorate of Licensing, U.S. Atomic Energy Commission.

Copics of these letters are enclosed.

In addition, the Model 660 has previously been deemed acceptabic as a l

Type B Shipping Container by the Office of Hazardous Materials U.S.

Department of Transportation, and has been issued 1ACA Certificate of

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Competent Authority No. USA-DOT-6-70.

We trust th t this application contains the information you require for your evaluation of this device. Your prompt review would be greatly appreciated.

Please advise us if any. additional information is required.

If we can assist you in~your evaluation by a visit to your office, we would be pleased,to do,80 s

l Since cly, N.

[J hn J. ;'t nro Ill H alth Physicist r

JJM/cmm Enclosures xc:

R. Prest 9011020066 901026 i

PDR ADOCK 07109033

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l-PDC

1.1ST 01' 1:NCl.OSUltES y

Description of Tecli/ Ops Models 660 and SSOE. Camma kay !'rojectors Description of Control Cable Connector and Lock Assembly Operating lost ructions for Sliipment of Tecli/ Ops Modela,660 and 660E Radiation Profile Model 660 Test Report: Model 660 Drop and. f'ynet ure Tests UK National Radiological Protection Board Report-AEC Materials Branch 1.etter of Acceptabili'ty.for Model'660 GammaLRay. Projector ACC Materials Branch 1.etter of Acceptability for Model 660E' Gamma Ray Projector IAEA Certificate of Competent Authority No. USA-DOT-6 Final Inspection Report Form 1.i s t of Drawings D66001 B66001-1 s

B66001-2 B66001-3 A66001-4 A66001-5 A66001-6

'B66001-7 A6u001-ll B66001-12 C66001-13 C66001-14 D66001-15 I

B66001-16 B66001-17 B66001-20 B66001-21 A66001-22 B66001-24 C660 B66101 bill of Materials for D66001 B53301-11 A52401-1 i-h

.AST!-48 AST1-44 AST1-18

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i DESCRIPTION Ol' TECil/ ops fR) del.S 660 AND 660E CAW 1A RAY PROJECTORS

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The Tech 70pn Hvdel 660 Camma Ray Projector is desiched for use as a radiographic exposure device asid shipping container for: radiographic sources in special, form.

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The Tech / Ops Model 660 Camma Ray Projectnr. measures zl2.75 inches-in length, 9.5 inches in height, and 4.75 inches in width.

The gros's weight of the container is 44 pounds.. The projector contains 29 pounds _

i of depicted uranium.

i The radioactive source is housed in a zircalloy "S" tube.

1he "S" tube.

has an outside diameter of 0.467 inches and an inside diameter of 0.385 inches.

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The rircalloy.abe is surrounded'by depicted uranium as-shielding material.

The uranium metal is cast arodnd the.zircalloy "S" tube'.

Reinforcement sleeves, fabricated from zircalloy tubing, are installed over the "S" tube at the position where the "S" tube leaves the shield.'

The depicted uranium shield assembly is encased in a steel housing.

The steel housing consists of a shell and two end plates...The shell i

is f abricated f rom 0.060 inch thick cold rolled steel.

The shell is formed to shape and welded along.the entire length of the scam.

The

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end plates are fabricated from 11 guage (0.120 inch' thick). cold rolled i

f steel. The end plates arc' bolt.ed together by means of tapped rods and flat head screws which extend through the shell.

The end plates are 1

not welded to the shell.

1 The void space in the container enclosure 18 filled with a rigid poly-urethane foam called Metrefoam hDR-20, manufactured by the Hereco t

Products Division of the Metachem Resins. Corporation.

This rigid foam has a compressive strength of 2000 psi and a density.of 20; pounds per i

cubic foot.

- f Attached to the rear end plate in the control connector and. lock assembly.

This lock assembly la identical to the lock assembly on Tech / Ops Models 684, 741, and 676 Gamma Ray Projectors, previously described to the j

Transportation branch, Directorate o.f Licensf ug, USAEC.

The operation of the control cable c6onector.and lock assembly is described in a separate en::losure, s

4 Attached to the f ront'end plate is 'the source dhipping plug connector.

This connector provide 6"a means of f astening the-source shipping plug 3

to the projector.

Tlie shipping plug'and the connector are drilled'for:

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s e a l ' wi re.' The source shipping plug provides an additional means of insuring the proper source storage ~ position and' provides a means of installing.a tamperproof seal to insure'that the= source ha.s not been inadvertently or intentionally-moved from its proper storage position.

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.l Models 66D and 660E (cont'inued),

The maximum capacity of the container v111. be 120 Curies c' 1ridium-192 as Special Form, Tech / Ops Source Assembly A424-9.

The sov= c assembly-A424-9 has been previously described to the Trannportation Branch, Directorate of Licensing, USAEC, in conjunction with Tech / Ops Models 741 and 684 Gamma Ray Projectors and Tech / Ops Model 650 Source Changer.

A radiation profile of Model 660, Serial Number 617, was made using an AN/PDR-27(J) Survey Meter, Serial Number 7930.

The-Mcdel 660 contained 96.7 Curies of Iridium-192 as Tech / Ops! Source Assembly A424-9,' Serial Number 2239.

The results of these measurements are presented in a separate enclosure. The maximum radiation' intensity. measured at the surface of the container was 130 milliroe6t. gens per hour, and the max-imum intensity measured at.1 meter was 1 m1111 roentgen per hour.

Extra-polating these measurements to the maximum container capacity of 120 Curies demonstrates that the radiation levels are below the regulatory limits.

The evaluation of the ability of the Model: 660 t o. meet -the requirements of the 30 foot drop test and the'40 inch puncture test of Title 10, Code of Federal Regulations.Part 71, is based on actual test results.

The Model 660 was dropped tbrough a distance of 30 feet onto a " hot top" driveway.

This test was. performed twice.

The container was dropped '

first on its front, bending the end plate.

The container was-then

.i dropped on the control cable connector.and lock assembly.

The projector was subsequently dropped fron.. height of 40 inchesionto a 6 inch diameter steel bar 10 inches long.

a As a result of these tests, there was no reduction of shiciding effect-i iveness nor loss of radioactive mater tal.. Copics of: photographs.and the test report are included as an enclosure to this submittal.

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.The fire test was not actually performed on-the'Model 660.

However,-

the following evaluation provides e.vidence that the Model 660 will

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perform satisfactorily under'the ffre. test conditions.

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The materials used in the, construction of the Model 660l1nclude c

Depleted Uranlum Melt!ing Polnt* 1133'c; -

Steel V ', '

Melting Point -1345'C-Zircalloy

-Melting Pojnt?.1750'C

• Berry 111um Copper Nelting Point-1055'C-l lironze Me1 ting: Point.'1005'C

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REFERENCE:

[lachinery'sLilandbook,19t h Edition,1973

• Metals llandbook 1

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~3-Models 660 and 660E (continued) 1

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The melting temperatures of the above, materials are well above the' fire test temperature.

Metrefoam will undergo decomposition at the fire' tout temperature. -The i

gaseous byproducts will ignite:1n air.

T%: Hodel 660 is not a sealed t

container, and thus will allow the gasetas byproducts-of the Metrefoam

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to vent from the container enclosure Lithout prensure' buildup sufficient to cause loss of the structural integrity. of-'the. container.

Thecontainerendplatesarebolted)together?throughthc.shell.:

The shell and endplate form a but t; joint.

This joint is neither~ gasketed.-

nor welded.. There is nu attempt to.make.thisijointtgas tight.

Thesc<

joints provide a pressure relief pathway.1-In addition, pathways: forn pressure relief exist in the end plates where the control cable--

connector and lock assembly and source shipping plug are attached.

7 The phenomena of the possibility-of a formation of the cutectic alloy; of iron. uranium at temperatures below,the melting temperatures of the individual materials was considered.

The--iron uranium cutectle' alloy temperature is'approximately:725*C.. liowever, vacuum conditions?and=

extreme cleanliness of the burfaces are necessary to produce:this; alloy D

at this low temperature. Duc to Lhe conditions ~uader-which the,.

uranium shields are mounted. sufficient contact for this effect to take'-

place does not exist.

Therefore..it is concluded lthat-the formationLof-the eutectic alloy is not a credibic consideration.

l The above information demonstrates that the Model;660_will perform satisfactorily under the hypothetical accident conditions.-

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1 In support of this evaluation,:information regarding a Model:660

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involved in a fire is presented.

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on April 29, 1974, in the United = Kingdom, a van carrying a Tech / Ops Model 660 caught fire..The United Kingdo'm National Radiologicai, Protection Board invest-igated the in'Ruent.. Their Investigationi indicated that the temperature to wl)lch the Modelt 660 was exposed was in excess of-660*C.

Th'py could not determine the duration. of the. fire,,

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-t As a resul-of the flrd, the: source assemblyDremained in-Its proper storage positio1 and?there was no reduction %in the.shiciding effective-

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ness of the package.

The source assembly;was: tested for; release:ofz radioactive material.

The radionssay, performed by the Natior,at Radiological Protection Board. revealed'no'det.c rabic l activity.

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' Examination:ofEthe. container by NKPB._indicatedithat %trefcam hadsbeen' LL

-burned away frcm the inside of tie contalnei. The container was-intact,-'

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indicating: that' suf ficic it. pathwaysicxist Efor-pressure reliefg of; the j;

Metrefoam decompositiori gases.~ - A copy 'of the 'NRPBLreport is 1ncluded.

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as.an. enclosure.,

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.M.odels 660 and 660E (continued)-

l The following quality assuranch. procedures are employed to. insure that

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each device manufdctured meets the specifications furnished to the Commission.

l All incoming inaterials 'and components and parts.manuf actured by Tech / Ops are inspected for conformance with drawings and specifications..

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Acceptable materials and-components are identified, traceabletto-origin, N

l and stored in a segregated area.

Rejected material is= subject.to review-

l for dispositian and segregated. All inspections are documented.

Work in progress is inspected at the-work station on a'first piece and periodic basis, in addition to inspection onicompletion and transfer to' s t oc k.'

Final innpection of equipment'is made prior to shipment.

The inspection is documented on the final test' report form enclosed.

This form is also used to document the inspection of repaita.

l The Tech / Cps Model 660 is labeled in recor.:ance with Drawing B66001-24.;

The Tech / Ops Model 660E "amma Ray Projector is identica' i to ' the Model 660 with the addition of an 'electt ! cal circuit which renders.the device compatible with Tech / Ops-Model 657 At.'omatic Exposure Device. The' j

Model 660E dif f ers f rom the Model 660 by the substitution of.the: rear end plate, as shown on Drawing B660E01.

j The hodel 660 and Madel 660E Gamma llay Projectors have beerr previously:

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found acceptable for licensing by..the Materials Branch,LDirectorate of I

Licensing, United States Atomic Energy l Commission.- In addition,'the o

Model 660 has been approved by the 0ffice.ofLilazardous Materials, United

's States Department of Transportation, and, issued' 1AEA Certificate ofi j

Competent Authority Number USA-DOT-6-70.'. Copies of these: approval

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1etters and certificate are included as:an;cnclosure.-

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