IRRSP - Industrial Radiography Radiation Safety Personnel Transportation of Materials Questions and Answers

Question 1

A radiographer prepares to transport a package containing a radiographic source. A survey of the package reveals a maximum radiation level of 35 mrem/hr at the surface and 0.7 mrem/hr at one meter. According to 49 CFR 172.403, what is the correct radioactive label for this package?

Accepted Answer

RADIOACTIVE YELLOW-II

Answer

According to 49 CFR 172.403, the label is determined by the higher of two conditions: the surface dose rate and the Transport Index (TI), which is the dose rate at 1 meter. A RADIOACTIVE YELLOW-II label is required when the surface dose rate is greater than 0.5 mrem/hr but not more than 50 mrem/hr, AND the TI is not more than 1. Since 35 mrem/hr is within the surface limit and the TI of 0.7 is within the TI limit, YELLOW-II is the correct label.

Question 2

Which of the following is the defining characteristic of the Transport Index (TI) on a radioactive materials package?

Accepted Answer

The maximum radiation level in mrem/hr at one meter from the package surface.

Answer

The Transport Index (TI) is explicitly defined in 49 CFR 173.403 as the dimensionless number equivalent to the maximum radiation level in millirem per hour (mrem/hr) at 1 meter (3.3 ft) from the external surface of the package, rounded up to the next tenth.

Question 3

An industrial radiography exposure device, containing a high-activity sealed source, is considered what type of shipping package?

Accepted Answer

Type B Package

Answer

Industrial radiography sources typically contain activities that exceed Type A quantity limits. Therefore, they must be transported in a Type B package. A Type B package is designed and tested to withstand severe accident conditions without a significant loss of shielding or containment, as required by regulations like 10 CFR Part 71 and 49 CFR 173.

Question 4

A radiographer is driving a company vehicle to a job site with a properly secured and labeled radiographic device. According to 49 CFR 177.817, where must the shipping papers be located during transportation?

Accepted Answer

Within the driver's immediate reach when restrained by a seatbelt.

Answer

DOT regulations require that shipping papers for hazardous materials be readily accessible to authorities in an emergency. 49 CFR 177.817 specifies that when the driver is at the vehicle's controls, the papers must be within their immediate reach while restrained by the lap and shoulder belt, and either readily visible or in a holder mounted to the inside of the door.

Question 5

Under which of the following conditions is a vehicle required to be placarded with 'RADIOACTIVE' signs on all four sides?

Accepted Answer

When the vehicle is carrying a package with a RADIOACTIVE YELLOW-III label.

Answer

According to 49 CFR 172.504, placarding of the transport vehicle is required for any shipment that includes a package bearing a RADIOACTIVE YELLOW-III label. Placarding is not required for packages with only WHITE-I or YELLOW-II labels.

IRRSP - Industrial Radiography Radiation Safety Personnel Practice Test

IRRSP - Industrial Radiography Radiation Safety Personnel Practice Test

IRRSP - Industrial Radiography Radiation Safety Personnel Transportation of Materials Questions and Answers