IRRSP Source Management and Security 1 — Questions and Answers
Question 1: How often must sealed sources used in industrial radiography be leak tested under 10 CFR 34?
- Monthly
- Every 6 months (Correct answer)
- Annually
- Every 3 months
Correct answer: Every 6 months
10 CFR 34.27 requires that sealed sources be leak tested at intervals not to exceed 6 months.
Question 2: What level of removable contamination indicates that a sealed source is leaking under NRC regulations?
- 100 Bq (0.003 µCi)
- 370 Bq (0.010 µCi)
- 185 Bq (0.005 µCi) (Correct answer)
- 1,000 Bq (0.027 µCi)
Correct answer: 185 Bq (0.005 µCi)
10 CFR 34.27 defines a leaking source as one with removable contamination exceeding 185 Bq (0.005 µCi).
Question 3: Within what timeframe must a licensee notify the NRC of a lost or stolen sealed source by telephone?
- Within 4 hours (Correct answer)
- Within 24 hours
- Within 72 hours
- Within 30 days
Correct answer: Within 4 hours
10 CFR 34.91 requires immediate telephone notification to the NRC within 4 hours of discovering a missing, lost, or stolen source.
Question 4: What document must a licensee maintain to ensure accountability of each sealed source in its possession?
- Shipping manifest
- Source inventory record (Correct answer)
- Survey log
- Personnel dosimetry report
Correct answer: Source inventory record
10 CFR 34.31 requires licensees to maintain an inventory record for each sealed source to ensure continuous accountability.
Question 5: Which of the following is required when a source change is performed on an industrial radiography exposure device?
- The NRC must be notified before the source change
- Only the manufacturer may perform source changes
- The source change must be documented and the new source inventoried (Correct answer)
- The source change must occur only at a licensed fixed facility
Correct answer: The source change must be documented and the new source inventoried
Source changes must be fully documented and the new source added to inventory records to maintain accountability as required under 10 CFR 34.
Question 6: How long must sealed source inventory records be retained under NRC regulations?
- 1 year after the record is made
- 3 years after the record is made (Correct answer)
- 5 years after the record is made
- Until the license expires
Correct answer: 3 years after the record is made
10 CFR 34.87 specifies that records of sealed source inventory must be retained for 3 years after the record is made.
Question 7: What is the primary purpose of the physical protection requirements in 10 CFR 37 for Category 1 and 2 radioactive materials?
- To document emergency contact information for first responders
- To prevent unauthorized access, loss, or theft of radioactive materials (Correct answer)
- To ensure proper environmental monitoring near storage areas
- To track cumulative occupational dose to radiation workers
Correct answer: To prevent unauthorized access, loss, or theft of radioactive materials
10 CFR 37 establishes physical protection requirements to prevent unauthorized access and theft of Category 1 and 2 radioactive materials.
IRRSP Source Management and Security 1
How often must sealed sources used in industrial radiography be leak tested under 10 CFR 34?