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Radioactive Material Control 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 Radioactive Material Control flashcards as text

  1. Under 10 CFR Part 20, what is the maximum permissible surface contamination level (removable) for beta-gamma emitters on unrestricted area surfaces?

    Answer: 200 dpm/100 cm²

    NRC limits removable beta-gamma contamination to 200 dpm/100 cm² on surfaces in unrestricted areas.

  2. Which document must accompany a shipment of radioactive material when transported by highway in the US?

    Answer: Shipping papers (Hazmat manifest)

    DOT regulations (49 CFR) require shipping papers describing the radioactive material to accompany all hazmat highway shipments.

  3. A 'fixed contamination' reading differs from a 'removable contamination' reading in that fixed contamination is:

    Answer: The activity that cannot be transferred by wiping

    Fixed contamination is the activity bound to a surface that does not transfer to a standard smear wipe, unlike removable contamination.

  4. What is the primary purpose of a Radioactive Material (RAM) inventory?

    Answer: To verify accountability and detect losses or theft of licensed material

    RAM inventories ensure all licensed material is accounted for and enable prompt detection of unauthorized removal or loss.

  5. When a radioactive spill occurs in a laboratory, what is the FIRST action a worker should take?

    Answer: Evacuate and post the area to prevent others from entering

    Immediately evacuating and posting the area prevents additional personnel from becoming contaminated before trained responders arrive.

  6. Which of the following best describes the concept of 'confinement' in radioactive material control?

    Answer: Physically containing material to prevent its spread into the environment

    Confinement uses barriers such as glove boxes, fume hoods, and sealed containers to prevent radioactive material from escaping into the workplace or environment.

  7. A survey meter reads 0.5 mR/hr at a drum labeled as radioactive waste. What additional measurement is needed to assess internal contamination hazard from the drum?

    Answer: Surface smear/wipe test for removable contamination

    A wipe test detects removable contamination on the drum exterior, indicating whether radioactive material could be transferred by contact and potentially inhaled or ingested.