10 CFR 71.83 - Assumptions as to unknown properties.

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§ 71.83 Assumptions as to unknown properties.

When the isotopic abundance, mass, concentration, degree of irradiation, degree of moderation, or other pertinent property of fissile material in any package is not known, the licensee shall package the fissile material as if the unknown properties have credible values that will cause the maximum neutron multiplication.

Title 10 published on 2015-12-04

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 10 CFR Part 71 after this date.

  • 2016-12-02; vol. 81 # 232 - Friday, December 2, 2016
    1. 81 FR 86906 - Miscellaneous Corrections
      GPO FDSys XML | Text
      NUCLEAR REGULATORY COMMISSION
      Final rule.
      This rule is effective December 30, 2016.
      10 CFR Parts 2, 10, 26, 30, 40, 50, 55, 61, 63, 70, 71, 72, 73, 74, and 100

Title 10 published on 2015-12-04.

The following are only the Rules published in the Federal Register after the published date of Title 10.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2016-12-02; vol. 81 # 232 - Friday, December 2, 2016
    1. 81 FR 86906 - Miscellaneous Corrections
      GPO FDSys: XML | Text
      NUCLEAR REGULATORY COMMISSION
      Final rule.
      This rule is effective December 30, 2016.
      10 CFR Parts 2, 10, 26, 30, 40, 50, 55, 61, 63, 70, 71, 72, 73, 74, and 100