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|  DOE-HDBK-1108-2002
Radiological Training for Accelerator Facilities
Student's Guide
Lesson Plan
Notes
However, per 10 CFR 835.1001(c), the primary methods used shall be
physical design features. Administrative controls and procedural
requirements shall be employed only as supplemental methods to
control radiation exposure.
A.
Engineered Controls
Engineered controls include equipment and structures (passive or
active) designed to protect personnel from hazards.
1.
Passive engineered controls
Once installed, passive engineered controls require no further
action to perform their intended function. Passive engineered
controls may include:
Radiation shielding: such as concrete blocks, iron
a.
plates, lead bricks and earth berms.
Barriers: such as fences, locked gates, and doors.
b.
Facility-Specific: facility-specific passive engineered
c.
controls.
2.
Active engineered controls
Active engineered controls include devices that sense changing
conditions and can trigger a safety action.
Safety interlock devices.
a.
Area radiation monitors.
N
Access sensors, magnetic and mechanical.
N
"Crash" or "scram" buttons.
N
Facility-specific: Facility-specific active engineered
b.
control devices.
19
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