Practice #5 32-40

Question 1

In a Pressurized Water Reactor, PWR, the turbine is contaminated. This is a result of water being boiled in the core, sent through moisture separators and dryers, and then into the turbine. True or False?

Answer 1

False

Question 2

Which of the following is a method that can be used to reduce background on
counting instruments.

Answer 2

Decontaminate the sample holder

Question 3

Scattering of gamma radiation in the shielding absorber is the best description of which of the following terms?

Answer 3

Build up factor

Question 4

How many hours would you have to spend in an airborne concentration of 1 DAC to acquire a dose of 5000 mrem?

Answer 4

2000

Question 5

A sample of material is counted and found to have 3.7 X10¹º disintegrations per second (dps). This would be classify as which of the following?

Answer 5

1 curie

Question 6

Which of the following is a fission barrier that prevents radioactive material from being released to the public?

Answer 6

A. Fuel cladding
B. Reactor coolant system
C. Containment building

Question 7

When counts can be seen on an instrument that are statistically different than background, is a definition for which of the following terms?

Answer 7

Standard Deviation of Background

Question 8

An air sample was taken during the removal of insulation from a main steam line leak in a BWR. The air sample was counted after the job was completed and
indicated 2 DACs of Co-58. How much internal dose would the workers received if they breathed that concentration of activity for 1 hour and 15 minutes duration of the job?

Answer 8

5 mrem