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Safety Policies and Controls - doe-hdbk-1113-98_reaffirm_2005_040156
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Radiological Safety Trainign for Uranium Facilities
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Module 106 Emergency Response for Uranium Incidents


DOE-HDBK-1113-98
Radiological Safety Training for Uranium Facilities
Module 105 - Criticality Safety
2. Controlling Uranium Inventories
One method to prevent a criticality is controlling uranium inventories. Inventory
control involves knowing where the uranium is at the facility and the level of
enrichment of the uranium. Uranium enriched in 235U or the presence of 233U is
of concern for criticality; therefore, these are materials of concern for inventory
control. Criticality is a concern for 238U if fast neutrons are present.
Loss of control of fissile material presents a threat to criticality safety at the
facility and, in a worst case scenario, to national security. It is no secret that
groups throughout the world are striving to become nuclear powers. Even the
appearance of a loss of inventory control must be avoided to keep the public
trust and assure continued operations of DOE programs. For these reasons,
inventories of fissile material are closely monitored.
3. Facility-Specific Criticality Safety Controls
Provide facility-specific information.
E.
Criticality Monitoring Techniques
Provide facility-specific information.
47


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