NRRPT Decontamination & Exposure Prevention 4

Question 1

A High Radiation Area (HRA) requires what type of access control per NRC regulations?

Accepted Answer

Locked or continuously attended control so that no individual is able to enter without being aware of the radiation hazard

Answer

HRAs must be locked or continuously attended to prevent inadvertent entry, ensuring workers are aware of the hazard before entering.

Question 2

Which of the following radionuclides poses the greatest internal hazard from inhalation due to its alpha emission and long lung retention?

Accepted Answer

Pu-239

Answer

Pu-239 is an alpha emitter that, when inhaled, deposits in the lung and lymph nodes where it delivers high LET dose over a long retention period.

Question 3

What is the purpose of a Radiological Work Permit (RWP) or Radiation Work Permit?

Accepted Answer

To document the radiological conditions, required protective measures, and dose estimates before workers enter a radiological area

Answer

An RWP documents expected radiological conditions, required PPE, dose estimates, and controls that workers must follow before and during work in a radiological area.

Question 4

In decontamination operations, why should decontamination always proceed from LEAST contaminated areas to MOST contaminated areas?

Accepted Answer

To prevent spreading contamination from highly contaminated areas into cleaner areas during the process

Answer

Working from least to most contaminated prevents cross-contamination — carrying contamination on tools or clothing from hot areas into cleaner zones.

Question 5

Protective clothing (anti-C) used in radiological work primarily protects against:

Accepted Answer

Contamination of the skin and personal clothing from radioactive particles

Answer

Anti-contamination clothing protects the skin and personal clothing from radioactive particle contamination — it provides no significant shielding against penetrating radiation.

(NRRPT) National Registry of Radiation Protection Technicians Practice Test

(NRRPT) National Registry of Radiation Protection Technicians Practice Test

NRRPT Decontamination & Exposure Prevention 4