DOE requires this course for all workers in areas with potential radiation exposure or radioactive contamination. The course includes classroom learning and realistic hands-on activities. Workers practice the use of anti-contamination clothing, respirators and monitoring equipment, and work in a simulated radiological area. Upon successful completion of this course, each worker receives a "DOE Card" (plastic card) that certifies the worker to work on any DOE facility for up to two years, at which time DOE requires the worker to either retake this course or pass a challenge examination.