Cedo - (Section 6) Magic Numbers

Question 0

What is the radiation storage area limit?

Answer 0

0.025 mSv/hr

Question 1

What is the radiation barrier limit?

Answer 1

0.1 mSv/hr

Question 2

What’s the radiation limit on the surface of a device?

Answer 2

2 mSv/hr

- Before use and upon installation of new source.

Question 3

A working calibrated survey meter must be capable of measuring in what range?

Answer 3

Between 20μSv to 100 mSv/hr

Question 4

Survey meters must be calibrated once every?

Answer 4

12 months.

Question 5

If a DRD reading exceeds 2 mSv during a shift, what should be done?

Answer 5

Stop work and investigate?

Question 6

When must a leak test be performed?

Answer 6

Once a year or upon new source installation.

If a reading of 200 Bq or higher is obtained withdraw from use.

Question 7

Long-handled tongs must be a minimum of what length?

Answer 7

1.5m

Question 8

Collimators must have a minimum shielding factor of?

Answer 8

100 SF

Question 9

Audible dosimeters must be calibrated how often?

Answer 9

12 months

Question 10

Audible dosimeters must alarm when intensity reaches a momentary dose of what? And a total absorbed dose of?

Answer 10

• 5 mSv/hr momentary

- 2 mSv total absorbed dose