The following design features should be considered for facilities that process
The process area should be compartmented to isolate high risk areas,
thereby minimizing productivity and financial loss if an accident occurs.
Movement of personnel, material, and equipment between the process
area and the uncontrolled area (such as the offices) should be through a
controlled access area or an air lock.
The process area should permit ease of egress and material/equipment
movement to allow rapid evacuation in the event of an accident.
Consideration should be given to providing a ready room near or within
the process area where maintenance, operating, and monitoring
personnel could be readily available. The room should be located in a
low background radiation area.
Indicators, auxiliary units, and supporting equipment control components
that do not have to be adjacent to operating/process equipment should
be installed outside the radiation or contaminated areas. Equipment that
requires periodic inspection, maintenance, and testing should be located
in areas with the lowest possible radiation and contaminated levels.
Equipment that is expected to be contaminated during operation should
have provisions for both in-place maintenance and removal to an area of
low radiation for repair. Maintenance areas for repair of contaminated
equipment should provide for containment or confinement of radioactive
To the maximum extent practicable, the process area should provide
sufficient space and versatility to accommodate equipment for
programmatic changes and process modifications. It should also be
designed to facilitate surveillance. Irregular plant layout (with obstacles)
should be avoided where possible.