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Nuclear criticality accidents.

D R Smith1

  • 1Los Alamos National Laboratory, New Mexico.

Occupational Medicine (Philadelphia, Pa.)
|October 1, 1991
PubMed
Summary
This summary is machine-generated.

Understanding nuclear criticality is key to preventing accidents. Criticality occurs when fissionable materials like plutonium or enriched uranium accumulate, releasing nuclear energy, with slightly enriched uranium requiring larger quantities.

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Area of Science:

  • Nuclear Engineering
  • Nuclear Safety

Background:

  • Criticality accidents are a significant concern in nuclear operations.
  • Past incidents primarily involved plutonium and highly enriched uranium.
  • Slightly enriched uranium necessitates larger quantities for criticality.

Purpose of the Study:

  • To explain the phenomenon of nuclear criticality.
  • To discuss factors influencing criticality.
  • To provide an understanding of criticality accidents.

Main Methods:

  • Review of historical criticality accidents.
  • Analysis of factors affecting nuclear criticality.
  • Discussion of material properties influencing criticality.

Main Results:

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  • Criticality is achieved by accumulating sufficient fissionable material, leading to nuclear energy release.
  • Plutonium and highly enriched uranium are common in criticality accidents.
  • Slightly enriched uranium systems have a higher threshold for criticality.

Conclusions:

  • Understanding the factors influencing criticality is essential for preventing accidents.
  • Knowledge of material properties and accumulation is crucial for nuclear safety.
  • This article provides a foundational understanding of criticality phenomena.