NMTCB Radiation Safety & Regulations 5

Question 1

What is the correct label category for a radioactive package with a transport index (TI) of 0.8 and surface radiation level of 4 mR/hr?

Accepted Answer

Radioactive Yellow-II

Answer

Yellow-II applies when TI is >0 but ≤1 and surface radiation is ≤50 mR/hr; a TI of 0.8 meets these criteria.

Question 2

What is 'committed effective dose equivalent' (CEDE) used to measure?

Accepted Answer

Internal radiation dose from inhaled or ingested radionuclides over 50 years

Answer

CEDE accounts for internal dose from radionuclides deposited in the body, integrated over the 50-year period following intake.

Question 3

After a misadministration (medical event) with a radiopharmaceutical, what is the NRC reporting timeframe?

Accepted Answer

Next day notification by telephone, written report within 15 days

Answer

10 CFR 35.3045 requires next-calendar-day telephone notification to the NRC (or Agreement State) and a written report within 15 days.

Question 4

Lead aprons used in nuclear medicine provide adequate shielding primarily for which type of radiation?

Accepted Answer

Low-energy X-rays and gamma rays below ~150 keV

Answer

Lead aprons are effective for low-energy photons but provide minimal protection against high-energy gamma emitters like F-18 (511 keV) commonly used in PET.

Question 5

Which federal regulation mandates radiation training for workers who handle radioactive materials?

Accepted Answer

10 CFR 19.12

Answer

10 CFR 19.12 requires licensees to provide radiation protection training to all workers who may be occupationally exposed to radiation.

(NMTCB) Nuclear Medicine Technology Certification Board Practice Test

(NMTCB) Nuclear Medicine Technology Certification Board Practice Test

NMTCB Radiation Safety & Regulations 5