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Radiation Shielding and ALARA Principles Flashcards

6 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 6 Radiation Shielding and ALARA Principles flashcards as text

  1. Which NRC regulation establishes the annual occupational dose limit for the whole body?

    Answer: 10 CFR Part 20

    10 CFR Part 20 sets the NRC's standards for radiation protection, including the 5 rem/year occupational whole-body dose limit.

  2. What is the annual occupational effective dose limit (deep dose equivalent) set by the NRC?

    Answer: 5 rem

    10 CFR 20.1201 sets the annual occupational total effective dose equivalent limit at 5 rem (0.05 Sv).

  3. Under ALARA, engineered controls are preferred over which type of control?

    Answer: Both A and B

    The hierarchy of controls places engineering controls above both administrative controls and PPE in the ALARA framework.

  4. What is the primary purpose of a radiation work permit (RWP)?

    Answer: To authorize and control radiological work activities

    An RWP formally authorizes specific work in radiological areas and communicates hazards, dose limits, and required controls to workers.

  5. Which action is an example of applying ALARA through the 'time' component?

    Answer: Rotating personnel to limit individual dose

    Rotating personnel limits the time any individual spends in a radiation field, reducing their cumulative dose.

  6. A tenth-value layer (TVL) reduces radiation intensity to what fraction of the original?

    Answer: 1/10

    A TVL is the thickness of material that attenuates radiation to one-tenth of its original intensity.