10 CFR 71.83
§ 71.83 Assumptions as to unknown properties.
United States · 10 CFR — Energy · Status: effective
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- Citation
- 10 CFR 71.83, § 71.83 Assumptions as to unknown properties, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/38253
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Full text
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.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.