Radiological Control & Safety Procedures Flashcards
7 cards from real NRRPT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Radiological Control & Safety Procedures flashcards as text
What is the correct procedure when a personnel dosimeter (TLD or film badge) is lost or damaged?
Answer: Reconstruct the dose using available survey records, air sample data, and co-worker dosimetry
When a dosimeter is lost or damaged, dose must be reconstructed using the best available information such as area surveys, air sampling data, bioassay results, and co-worker doses.
Under the NRC's 10 CFR 20 access control requirements, who must be informed of their dose and dose limits?
Answer: All radiation workers at the start of their employment or upon entering a restricted area
10 CFR 20.1902 requires that licensees inform workers of dose limits and make their dose records available prior to starting work in a restricted area.
Which of the following best describes the inverse square law as applied to radiation protection?
Answer: Radiation intensity decreases with the square of the distance from the source
The inverse square law states that radiation intensity varies inversely with the square of the distance from a point source—doubling distance reduces intensity to one-quarter.
A radiological contingency plan should include which of the following elements?
Answer: Identification of credible accidents, estimated consequences, and pre-planned response actions
A radiological contingency plan must identify credible accident scenarios, estimate consequences, and specify pre-planned response actions to protect workers and the public.
What is the recommended surveying technique to locate the edge of a contamination boundary accurately?
Answer: Move the detector slowly (2-3 cm/sec) in overlapping parallel paths at a consistent height
Slow, overlapping systematic survey passes ensure thorough coverage and allow the instrument's response time to register localized contamination without missing spots.
A worker receives an unplanned dose of 1.25 rem during an emergency that was not anticipated in the RWP. Under ALARA principles, what is the most appropriate next step?
Answer: Conduct a post-job review to analyze the cause, assess controls, and prevent recurrence
Post-job reviews of unplanned exposures are a key ALARA practice to identify root causes, evaluate the effectiveness of controls, and implement improvements.
When using the 'point source' approximation to estimate shielding requirements, which condition invalidates this approximation?
Answer: When the source dimensions are comparable to or larger than the distance to the point of interest
The point source approximation is only valid when the source is small compared to the distance to the receptor; for distributed sources, more complex geometric calculations are required.