ML20133K494
| ML20133K494 | |
| Person / Time | |
|---|---|
| Site: | 07000036 |
| Issue date: | 02/04/1958 |
| From: | Leaders W MALLINCKRODT, INC. |
| To: | Johnson L US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20133G976 | List:
|
| References | |
| FOIA-96-343 NUDOCS 9701210248 | |
| Download: ML20133K494 (3) | |
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MALLINCKRODT CHEMICAL WORKSM M ANU FACTURE RS OF FINE CHEMICALS FOR MEDICINAL, PHOTOGRAPHIC
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Lo is ANALYTICAL ANO INDUSTRIAL PURPOSES oesAsnico. NEW YOnN
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k February 1958 4
- Mr. Igall Johnson Licensing Division
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' U. S. AtomLe Energy Commission Washington, D.C, SUBIECT: Special Nuclear M2terials License No. SW33 f [f g
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Dear Mr. Johnsons Some of our customera for our UOr of up to $$ enrichment have indicated a In l
preference for blended lots in excess of the " limited safe" batch size.
crder to provido such material, it is necessary to utilize blending equipment.
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We have designed a blending facility which we believe quite adequate from the standpoint of criticality control and dust control and are requesting that our license be modified to include this b1sading facility as a part thereof.
We product from our low assay production area is produced batch-wise utilis-ing " limited safe" quantities for the particular asasy with a nav1=n= quantity of approximately 350 pounds for the lower assay material.' Each.15 gallon
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drum, as it is filled in the final operation, contains no mare than one i
alinited safe" beteh.
The blending will be accomplished in a specially designed duet control' hood, j
A mar 1=tm of 10 drums can be combined in a single operation in the following-manners
-1, A single drum from a storago rack containingla ? limited'anfe"ibetoh will I
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be placed in the hood, Atter closing the hoodf the lid'will' be f removed and the drum placed on a four wheel.dollyfininseanted position. :The dolly rides on mils along the back of the bogd.'.
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In front of the sail carrier will be 1Nated5Inih stdtikembosperated l
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from the next hy a. concrete slab 1 ftf thisk7approutmately.3:ft,'ihigh l
and 2 ft. wide to isolate eachL statidnWom the. nest'from a; neutron-inter-action standpadat. An empty 15 'galleef degpt'will be:positionindhin each 7 etation.
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,i-De dolly will' be moved from station'to stdtion'and'an aperstar'will-trans-3.
for with a. hand scoop, by volume, one-tenth of'the prodnot'from the' full drum into a drum'in each of the receiving { stations.
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Mr. Ipan J ohnso; V
Page Two k February 1958 h.
This operation will be repeated until the entire batch is blended or until the drums at each station are 65% filled. The individual drums having re.
ceived the incremental parts of the blend will be fitted.with a lid, re-moved from the hood, placed on a rouer and tumbled to accomplish blending.
At this point, the drums, if they contain a " limited safe" batch, win be accurately weighed and placed in birdcages and transferred to the stwage vault awaiting shipment.
In the cases where the 65% filled drum contains less than a alimited safe" batch, these drums will be transferred to a packaging station where the individual drums win be loaded, by weight.
Se " limited safe" quantity win not 'be exceeded in any drum. Following loading and weighing, the drum win be placed in a birdcage for transfer to the storage vault awaiting shipment.
The procedure for material mment control inside the blending building will be ae follows:
1.
Facilities The blending room is approxinately 20 x 50 8 and the entire area will be devoted to this single operation. We blender hood is on one wall. Steel storage racks will occupy two other walls. These racks are constructed to maintain 2 ft, edge to edge spacing between sides and top and bottom of the drums, One rack provides for two-high storage and one rack fce three-high storage. Also in this area will be a dust contro11od packaging hood which will be used in those cases where the batch size in greater than can be properly tumbled for adequate blending. Also in the same area will be two roner type blending machines for tumbling drums. Rose are so located that when two drums are being rotated at the same time, spacing of mee than 2 ft. edge to edge is mLintained.
2.
Material Movement Drums will be removed from the packaging station in the UDs production facilit;r by, fork truck and carried, com at a tism, into the storage racks in the blender bn41 ding. Brightly colored 11 ass will be painted on floors as m' guide to the fork truck operstars so as to prevent-the possible close i
approach of.-two " limited safe" batches.: In the blender buildian, brightly colored 11 ass win be pain ~ 2d on the floor';in front of au stauge zucks
. ani the blender hood as a guide to the operators: to. intitante~ the -central floor area in which laterni movement of a drum will be' permitted. : This contaul' area insidef the colored;1ines' wn1Lamintain atLleast a 2 ft. edge i
to; edge sysosibetwoon the' drum'being. moved and those in either_ the stcrage zuok or the blender hood. ' An'persoonsi will' be 'carufuny instructed as to the necessity of maintaining this' spacing'and the operating procedure j
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-. :. win be rigorously enforced.
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De fined drums from the blending hood leaded to'appearinately 65% by i
volume er less, depending upon assay, will be moved by hand dolly out of the individual stans to the central area beyond the colored line and i
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'..14 Fohruary 1950 moved to the rolling station. From the rolling station the drums will go into birdcages directly if the contents of the drum are a " limited safe" batch and to the packaging station if the drum contains less than a
" limited safe" batch for filling to not scre than the " limited safe" quantity. A scale is provided for accurate weighing checks.
We request your prompt considoration of this application and further request that if additional informtion is required we be informed by telephone or tele-graph so that we may supply the needed additional inforntion promptly.
Sincerely yours, MAIJ,,INCKRG7f CIIF#ICAL WORIG 77;ya&
W. M. Inadora Technical Director S cial Metals Division
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STATE OF MARYLAND
_ MONTGOMERY COUNTY Signed before me this 6th day of February 1958.
& D % b.fou w Battaille 8. Power Notary Public Commission expires May 4,1959 4
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