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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

  1. What is the correct sequence for donning personal protective equipment (PPE) when entering a contaminated area?

    Answer: Respirator → coveralls → inner gloves → booties → outer gloves

    Respirator is donned first to protect airways before other PPE is put on, followed by coveralls, gloves, and booties to minimize contamination risk during donning.

  2. A high radiation area (HRA) is defined under 10 CFR 20 as an area where radiation levels could result in a dose equivalent exceeding what value in one hour at 30 cm from the source?

    Answer: 100 mrem (1 mSv)

    Per 10 CFR 20.1003, a high radiation area means radiation levels that could result in an individual receiving a dose equivalent in excess of 100 mrem in one hour at 30 cm.

  3. When performing a frisking (contamination survey) of a worker exiting a radiological area, which body region should be surveyed last?

    Answer: Hands and wrists

    Hands and wrists are surveyed last because they often have the highest contamination potential and are used throughout the frisking process.

  4. What does the term 'stay time' refer to in radiological control planning?

    Answer: The calculated time a worker can remain in a radiation field without exceeding a specified dose

    Stay time is the maximum duration a worker may remain in a radiation field to keep the received dose within planned limits.

  5. Which type of radiation is most effectively shielded by a thin sheet of paper or the dead layer of skin?

    Answer: Alpha

    Alpha particles have very low penetrating power and are stopped by a sheet of paper or the outer dead layer of skin, posing hazard mainly through internal exposure.

  6. A radiological posting that reads 'Airborne Radioactivity Area' indicates that concentrations of radioactive material in air exceed what fraction of the Derived Air Concentration (DAC)?

    Answer: 0.1 DAC

    Per 10 CFR 20.1003, an airborne radioactivity area exists when airborne concentrations exceed 0.1 DAC or intake rates that would result in a dose exceeding 10% of the ALI in a week.

  7. What is the purpose of a 'two-person rule' in high radiation areas?

    Answer: To ensure a second person is present to assist or get help in the event of an emergency

    The two-person rule in high radiation areas ensures that if one worker becomes incapacitated, the second can provide assistance or summon emergency help.