Criticality Safety Review of 2 1/2-, 10-, and 14-Ton UF(Sub 6) Cylinders

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Description

Currently, UF{sub 6} cylinders designed to contain 2 1/2 tons of UF{sub 6} are classified as Fissile Class II packages with a transport index (TI) of 5 for the purpose of transportation. The 10-ton UF{sub 6} cylinders are classified as Fissile Class I with no TI assigned for transportation. The 14-ton cylinders, although not certified for transport with enrichments greater than 1 wt % because they have no approved overpack, can be used in on-site operations for enrichments greater than 1 wt %. The maximum 235U enrichments for these cylinders are 5.0 wt % for the 2 1/2-ton cylinder and ... continued below

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46 pages

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Broadhead, B.L. January 1, 1991.

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Description

Currently, UF{sub 6} cylinders designed to contain 2 1/2 tons of UF{sub 6} are classified as Fissile Class II packages with a transport index (TI) of 5 for the purpose of transportation. The 10-ton UF{sub 6} cylinders are classified as Fissile Class I with no TI assigned for transportation. The 14-ton cylinders, although not certified for transport with enrichments greater than 1 wt % because they have no approved overpack, can be used in on-site operations for enrichments greater than 1 wt %. The maximum 235U enrichments for these cylinders are 5.0 wt % for the 2 1/2-ton cylinder and 4.5 wt % for the 10- and 14-ton cylinders. This work reviews the suitability for reclassification of the 2 1/2-ton UF{sub 6} packages as Fissile Class I with a maximum {sup 235}U enrichment of 5 wt %. Additionally, the 10- and 14-ton cylinders are reviewed to address a change in maximum {sup 235}U enrichment from 4.5 to 5 wt %. Based on this evaluation, the 2 1/2-ton UF{sub 6} cylinders meet the 10 CFR.71 criteria for Fissile Class I packages, and no TI is needed for criticality safety purposes; however, a TI may be required based on radiation from the packages. Similarly, the 10- and 14-ton UF{sub 6} packages appear acceptable for a maximum enrichment rating change to 5 wt % {sup 235}U.

Physical Description

46 pages

Source

  • Other Information: PBD: 1 Jan 1991

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  • Report No.: ORNL/TM-11947
  • Grant Number: AC05-00OR22725
  • DOI: 10.2172/814254 | External Link
  • Office of Scientific & Technical Information Report Number: 814254
  • Archival Resource Key: ark:/67531/metadc737656

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • January 1, 1991

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • March 31, 2016, 12:48 p.m.

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Broadhead, B.L. Criticality Safety Review of 2 1/2-, 10-, and 14-Ton UF(Sub 6) Cylinders, report, January 1, 1991; United States. (digital.library.unt.edu/ark:/67531/metadc737656/: accessed August 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.