CHP Radioactive Materials Handling & Waste Management Flashcards
6 cards from real CHP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CHP Radioactive Materials Handling & Waste Management flashcards as text
Which US federal agency has primary regulatory authority over the transportation of radioactive materials by road, rail, and air within the US?
Answer: DOT/PHMSA (Department of Transportation)
DOT, through the Pipeline and Hazardous Materials Safety Administration (PHMSA), has primary authority over radioactive material transport under 49 CFR Parts 171-180.
What is the definition of a Type B shipping package for radioactive materials?
Answer: A package designed and tested to retain contents under severe accident conditions
Type B packages are engineered to withstand severe accident conditions — including 9-meter drop, puncture, fire, and immersion tests — and are required for high-activity shipments.
What does the Transport Index (TI) represent for a radioactive material package?
Answer: The maximum dose rate in mrem/hour measured at 1 meter from the package surface
The Transport Index is the maximum radiation level (mrem/hr) at 1 meter from any external package surface, used to control worker dose and limit package accumulation.
A Radioactive Yellow-III label is required on a package when which condition is met?
Answer: The surface dose rate exceeds 200 mrem/hr or the TI exceeds 10
Radioactive Yellow-III labels are required when surface dose rates exceed 200 mrem/hr or the Transport Index exceeds 10, indicating the highest category of transport radiation hazard.
What is the purpose of the Criticality Safety Index (CSI) used in the transportation of fissile radioactive materials?
Answer: To control accumulation of fissile packages and prevent inadvertent nuclear criticality
The CSI controls how many fissile material packages can be grouped together in a transport conveyance or storage area to prevent an unplanned nuclear chain reaction.
Under DOT Hazardous Materials Regulations, what does 'Exclusive Use' (sole use) mean for a radioactive material shipment?
Answer: The entire transport vehicle is dedicated to one consignment, permitting higher allowable external dose rates
Exclusive Use shipments dedicate the entire conveyance to a single consignor's radioactive cargo, permitting higher external dose rates since no other cargo or passengers are present.