Critical Mass

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Radiation safety The minimum amount of material—mass of a particular radioisotope—required for it to reach ‘criticality’ and undergo a spontaneous fission chain reaction, releasing a lethal shower of neutron and gamma radiation
Research A popular term for the minimum number of persons working in related fields in a particular place, below which creative thinking and interaction may be suboptimal
References in periodicals archive ?
According to Kevin Albers, the manufacturing engineer who manages the F-35 modeling and simulation efforts at Fort Worth, "All of the critical assembly sequence operations have been simulated.
a subsidiary of Nordson Corporation (NASDAQ: NDSN) has developed two new products for improving medical device, electronics and other critical assembly processes.
In this regard, the parties note with satisfaction that Kazakhstan has recently completed the conversion of the VVR-K research reactor at the Institute of Nuclear Physics (INP) to low enriched uranium (LEU) fuel, following the previous conversion of the VVR-K critical assembly.
The design called for four rubber isolation bushings to support this critical assembly [ILLUSTRATION FOR FIGURE 3 OMITTED], which measured 0.

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