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Radiological Safety Training for Uranium Facilities - index
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DOE-HDBK-1113-98
Module 105 Criticality Safety
Lesson Plan
Instructor's Notes
D.
Safety Policies and Controls
Achieving criticality involves bringing together many
factors that promote a sustained nuclear chain reaction. To
avoid criticality, one should be aware of the conditions that
would promote a criticality for the particular materials they
encounter, and avoid those conditions that promote
criticali ty.
1.
General Criticality Safety Principles
Some things done to promote criticality safety
include:
analyzing work environments to assess the risk of
criticality and eliminate likely criticality
concerns;
using carefully planned and approved procedures;
providing specific training for those personnel
working in areas where fissile materials are
present; and
implementing system design features that are
favorable to criticality safety. These features
include:
- using containers with a size and geometry
that will not allow criticality,
- designing piping systems to prevent buildup
of uranium and prevent criticality,
65


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