NRRPT Dosimetry and Exposure Control 4

Question 1

A worker's quarterly TEDE is calculated by summing the deep dose equivalent (DDE) and the committed effective dose equivalent (CEDE). If DDE = 300 mrem and CEDE = 120 mrem, what is the TEDE?

Accepted Answer

420 mrem

Answer

300 mrem

Answer

120 mrem

Answer

180 mrem

Question 2

The Annual Limit on Intake (ALI) for a radionuclide is defined as the intake that would result in a committed effective dose equivalent of:

Accepted Answer

5 rem (0.05 Sv)

Answer

1 rem (0.01 Sv)

Answer

15 rem (0.15 Sv)

Answer

50 rem (0.5 Sv)

Question 3

In whole-body counting, which detection method is most commonly used to measure gamma-emitting internal contamination in a worker?

Accepted Answer

NaI(Tl) or HPGe scintillation/semiconductor detector system

Answer

Urinalysis

Answer

Nasal swab

Answer

Blood sampling

Question 4

Under the 10 CFR Part 20 dose constraint concept for air emissions, licensees must constrain doses to individual members of the public to what level?

Accepted Answer

10 mrem/yr

Answer

100 mrem/yr

Answer

25 mrem/yr

Answer

50 mrem/yr

Question 5

Which administrative control sets dose limits lower than regulatory limits to ensure workers don't inadvertently exceed legal limits?

Accepted Answer

Administrative control level (ACL)

Answer

Derived air concentration (DAC)

Answer

Exposure rate factor (ERF)

Answer

Dose commitment factor (DCF)

Question 6

A Derived Air Concentration (DAC) for an inhalation pathway is defined as the airborne concentration that, if breathed for:

Accepted Answer

2000 hours per year at work rate breathing, results in intake of 1 ALI

Answer

8 hours at work rate breathing, results in intake of 1 ALI

Answer

40 hours per week at light activity, results in 5 rem dose

Answer

100 hours cumulatively, results in 500 mrem

Question 7

Which of the following best describes the purpose of a nuclear track etch dosimeter (e.g., CR-39)?

Accepted Answer

Measuring fast neutron doses through recoil proton tracks in plastic

Answer

Measuring low-energy beta particle doses

Answer

Real-time gamma dose rate monitoring

Answer

Detecting alpha contamination on surfaces