IRRSP Source Management and Security 3

Question 1

What is the half-life of Iridium-192 (Ir-192), the most commonly used industrial radiography isotope?

Accepted Answer

73.83 days

Answer

Ir-192 has a half-life of approximately 73.83 days, requiring frequent source replacement but allowing relatively rapid decay for waste management purposes.

Question 2

Which isotope used in industrial radiography has the longest half-life among those listed below?

Accepted Answer

Cobalt-60 (Co-60) — 5.27 years

Answer

Co-60 has a half-life of approximately 5.27 years, making it the longest-lived of the common industrial radiography isotopes and requiring less frequent source replacement.

Question 3

What is the required method for disposing of a depleted or unwanted sealed source used in industrial radiography?

Accepted Answer

Transfer it to a licensed recipient, waste broker, or return it to the manufacturer

Answer

Sealed sources must be transferred to a licensed recipient such as a radioactive waste broker, distributor, or manufacturer for proper regulatory disposal.

Question 4

What information must be recorded and reported to the NRC when a licensee transfers a sealed source to another party?

Accepted Answer

The source identity, estimated activity, transfer date, and recipient's license number

Answer

10 CFR 34.31 requires documentation of source transfers including the source identity, estimated activity, transfer date, and the recipient's NRC or Agreement State license number.

Question 5

During a source change on an exposure device, what is the primary radiological concern for the radiographer performing the procedure?

Accepted Answer

Occupational dose exposure during the source exchange procedure

Answer

Source change procedures place the radiographer closer to an unshielded source than virtually any other task, making occupational dose management the primary radiological concern.

IRRSP - Industrial Radiography Radiation Safety Personnel Practice Test

IRRSP - Industrial Radiography Radiation Safety Personnel Practice Test

IRRSP Source Management and Security 3