CHP CHP Radioactive Materials Handling & Waste Management

Question 1

Which NRC license type grants a large institution broad authorization to use a wide range of radioactive materials with minimal individual license amendments?

Accepted Answer

Type A broad scope specific license

Answer

Specific license — limited scope

Answer

General license

Answer

Agreement State registration only

Question 2

When handling unsealed radioactive materials, which personal protective measure is most critical for preventing internal contamination?

Accepted Answer

Gloves and appropriate respiratory protection

Answer

Lead apron to reduce external dose

Answer

Dosimetry badge worn on the chest

Answer

Leaded eyeglasses for lens protection

Question 3

What is the most appropriate shielding material for high-energy gamma rays emitted by radionuclides such as Co-60?

Accepted Answer

Lead or dense concrete

Answer

Plexiglass (acrylic)

Answer

Aluminum sheeting

Answer

Cardboard and paper

Question 4

The 'two-person rule' (no lone zone) in nuclear security most commonly applies to which type of radioactive material operation?

Accepted Answer

Operations involving significant quantities of special nuclear material (SNM)

Answer

Routine laboratory work with exempt quantities

Answer

Medical X-ray procedures in hospitals

Answer

Low-level waste disposal activities

Question 5

What is the primary purpose of a Radiation Use Authorization (RUA) at a research institution licensed under a broad scope license?

Accepted Answer

To document approved procedures, authorized users, quantities, and locations for safe use

Answer

To comply with state environmental reporting requirements

Answer

To authorize purchase orders for radioactive material vendors

Answer

To report radiation incidents to the NRC

Question 6

When using high-energy beta emitters like P-32, why is low-density plastic (acrylic/Lucite) preferred over lead for shielding?

Accepted Answer

Lead produces bremsstrahlung X-rays that increase total dose, while plastic minimizes secondary radiation

Answer

Plastic is less expensive and easier to fabricate

Answer

Plastic provides better attenuation of all radiation types

Answer

Lead is not approved by the NRC for beta shielding