ANSI/ANS 8.12, Nuclear Criticality Control and Safety of Plutonium-Uranium Fuel Mixtures Outside Reactors
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
This standard is applicable to operations with homogeneous mixtures of plutonium and uranium. The mixtures may be solutions, suspended solids, precipitates, or may have been formed mechanically. Basic criteria are presented for plutonium-uranium fuel mixtures containing no more than 30 wt.% plutonium combined with uranium containing no more than 0.71 wt.% 235U. This standard does not include the details of administrative controls, the design of processes or equipment, the description of instrumentation for process control, or detailed criteria to be met in transporting fissionable materials. The limits of this standard are not applicable to heterogeneous systems such as lattices of rods in water, mixtures in which particles are large enough to introduce lumping effects, or mixtures in which the concentrations of components are nonuniform. The limits are applicable, however, to homogeneous mixtures and slurries in which the particles constituting the mixture are uniformly distributed and have a diameter no larger than 127..mu..m (0.005 in.), i.e., are capable of being passed through a 120-mesh screen.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 15014211
- Report Number(s):
- UCRL-CONF-204362; TRN: US200805%%366
- Resource Relation:
- Conference: 2004 American Nuclear Society Winter Meeting, Washington, DC (United States), 14-18 Nov 2004
- Country of Publication:
- United States
- Language:
- English
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