Radiation Sources and Equipment Safety Flashcards
6 cards from real RSO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Radiation Sources and Equipment Safety flashcards as text
When decommissioning a radiation-producing device, the RSO must ensure that:
Answer: All radioactive sources are properly transferred to a licensed recipient or disposed of per applicable regulations
Decommissioning requires that radioactive sources associated with the equipment are transferred to another licensee or disposed of following NRC regulations, with appropriate documentation submitted to the NRC.
A neutron generator in a research laboratory presents a unique hazard beyond direct neutron dose because it can:
Answer: Produce neutron-activated radioactive materials in surrounding shielding and equipment
Neutron generators can activate surrounding materials (concrete, steel, water, equipment) through neutron capture, creating induced radioactivity that persists after the generator is turned off.
The RSO's role in reviewing shielding designs for a new radiography suite includes ensuring that the design keeps doses in adjacent occupied areas below:
Answer: The controlled area limit for workers and uncontrolled area limit (1 mSv/year) for members of the public
Shielding design must ensure that controlled areas meet occupational dose limits and that uncontrolled areas (accessible to non-radiation workers and the public) receive no more than 1 mSv/year.
A portable industrial X-ray unit used for weld inspection must be clearly labeled and marked, and the operator must:
Answer: Establish a controlled area, post required signs, and ensure no individual in the area receives an unacceptable dose
Operators of portable X-ray units for industrial radiography must establish and control the radiation area, post required warning signs, and ensure that all persons in or near the area receive doses within regulatory limits.
Radiation safety interlock systems on irradiators and accelerators serve what primary purpose?
Answer: To prevent personnel access to the radiation field and terminate exposure automatically if an entry is detected
Interlocks are engineered safety features that prevent accidental human entry into the radiation field by terminating the exposure or withdrawing the source when a door or barrier is opened.
A Very High Radiation Area (VHRA) under NRC regulations is defined as a location where doses could exceed:
Answer: 500 rad/h (5 Gy/h) at 1 meter
A Very High Radiation Area is defined under 10 CFR 20.1003 as a location where radiation levels could result in an absorbed dose exceeding 500 rad (5 Gy) in 1 hour at 1 meter, requiring additional controls beyond High Radiation Area requirements.