NRRPT Radioactive Waste Management & Disposal 2

Question 1

The 'decay-in-storage' method is most applicable for radioactive waste containing isotopes with:

Accepted Answer

Half-lives less than 90 days

Answer

Decay-in-storage is practical for short-lived radionuclides (typically half-lives ≤90 days) so the waste can decay to background levels before disposal as non-radioactive waste.

Question 2

Which treatment method is most commonly used to reduce the volume of liquid radioactive waste generated at nuclear facilities?

Accepted Answer

Evaporation/concentration

Answer

Evaporation concentrates radioactive contaminants into a small volume of sludge or dried solids while producing relatively clean condensate, achieving high volume reduction ratios.

Question 3

What does the prohibition on 'free liquids' in LLW disposal containers require?

Accepted Answer

Packaged waste must not contain liquid that can drain from the container

Answer

10 CFR Part 61 prohibits free-standing liquids in LLW packages to prevent leachate migration and ensure package integrity during burial.

Question 4

Cementation, bituminization, and polymer impregnation are all examples of which radioactive waste treatment process?

Accepted Answer

Solidification/stabilization

Answer

Solidification/stabilization processes immobilize radionuclides in a solid matrix, reducing leachability and improving waste form stability for long-term disposal.

Question 5

Greater-Than-Class-C (GTCC) LLW differs from Class C LLW primarily because:

Accepted Answer

Its radionuclide concentrations exceed Class C limits and require deeper disposal

Answer

GTCC waste has radionuclide concentrations exceeding the Class C thresholds in 10 CFR Part 61 and is not acceptable for near-surface disposal; it requires disposal in a geologic repository.

(NRRPT) National Registry of Radiation Protection Technicians Practice Test

(NRRPT) National Registry of Radiation Protection Technicians Practice Test

NRRPT Radioactive Waste Management & Disposal 2