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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 DOT regulations, a Type A quantity of radioactive material is defined as:

    Answer: A quantity not exceeding the A1 or A2 value for the radionuclide

    Type A quantities are at or below the A1 (special form) or A2 (normal form) values, which represent the maximum allowed in a Type A package.

  2. What does the term 'source check' mean in the context of portable radiation survey instrument quality control?

    Answer: Verifying instrument response using a known reference source

    A source check confirms that a survey instrument gives a consistent, expected response to a reference source, indicating the instrument is functioning properly.

  3. Which action is required when radioactive material is found missing during a routine inventory?

    Answer: Immediately notify the NRC Operations Center if the missing quantity meets reporting thresholds

    10 CFR 30.50 and 10 CFR 20.2201 require immediate notification to the NRC Operations Center when theft or loss of reportable quantities of licensed material is discovered.

  4. A 'hot particle' is particularly hazardous because it:

    Answer: Delivers a highly localized dose to a small area of skin or tissue

    Hot particles deliver an extremely high local dose rate to a microscopic area of skin or tissue, potentially exceeding skin dose limits even when whole-body dose is low.

  5. Which engineering control most effectively reduces airborne radioactive contamination during decommissioning activities?

    Answer: Using local exhaust ventilation with HEPA filtration at the point of generation

    Local exhaust ventilation captures contaminants at their source before they disperse, and HEPA filters prevent release into general ventilation.

  6. What is the regulatory basis for establishing a Radiological Controlled Area (RCA) boundary?

    Answer: Areas where dose rates or contamination levels require access control to limit exposure

    NRC regulations define controlled areas as locations where access must be managed to protect individuals from exceeding dose limits due to radiation or radioactive contamination.

  7. When classifying radioactive waste for disposal, the primary factor distinguishing Class A, B, and C low-level radioactive waste (LLW) is:

    Answer: Concentration of specific radionuclides relative to regulatory limits

    10 CFR 61 classifies LLW by comparing radionuclide concentrations in the waste against tabulated limits; higher concentrations require more robust disposal methods.