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ANS 8.12

87th Edition, January 1, 1987

Complete Document

Nuclear criticality control and safety of plutonium-uranium fuel mixtures outside reactors

Includes all amendments and changes through Reaffirmation Notice , May 6, 2016


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Active, Most Current

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Product Details:

  • Revision: 87th Edition, January 1, 1987
  • Published Date: May 6, 2016
  • Status: Active, Most Current
  • Document Language: English
  • Published By: American Nuclear Society (ANS)
  • Page Count: 22
  • ANSI Approved: Yes
  • DoD Adopted: No

Description / Abstract:

This standard is applicable to operations with plutionium-uranium oxide fuel mixtures outside nuclear reactors, except the assembly of these materials under controlled conditions, such as in critical experiments. Basic criteria are presented for plutonium-uranium fuel mixtures in single units of simple shape containing no more than 30wt5 plutonimu combined with uranium containing no more than 0.71 wt% 235U. The limits for uniform aqueous mixtures (solution) are applicable to homogeneous mixtures and slurries in which the paraticles constituting the mixture are uniformly distributed and have a diameter no larger than 127 mm (0.005 in.), i.e., are capable of being passed through 120 mesh screen.

This standard does not include the details of administrative controls, the design of processes or equipment, the description of instrumentation ofr process control or detailed criteria to be met in transporting fissionable materials.