Radiation Detection And Protection

Question 1

Purpose and operation of gas-filled detectors

Answer 1

Purpose:
-Detects alpha, beta, neutron and gamma radiation

Operation:
-Cylinder filled with an inert gas and has an anode and cathode and radiation reacts with gas to create an electron creating a reading

Question 2

Purpose and operation and advantages of scintillation detectors

Answer 2

Purpose:
-To detect ionization from particles such as alpha, beta, gamma, neutron radiation

Operation:
-Radiation->crystal-> light->photomultiplier =signals
-Has a dynode

•Advantages
-Efficient
-precision
-high counting rates

Question 3

Purpose and operation of process radiation monitors

Answer 3

•Purpose
-Monitor a stream of liquid or gas within a plant system

•Operation
-Goes through a radiation monitor and alerts if abnormal

Question 4

Purpose and operation of Area radiation monitor

Answer 4

•Purpose
-Monitor areas where potential exist for significant changes in radiation

•Operation
-Monitors direct a sample of surrounding air and will alert if abnormal

Question 5

What’s dose?

Answer 5

-The total amount of radiation someone was exposed to.
-measured in rem or mrem

Question 6

What’s dose rate?

Answer 6

-Dose rate is how fast radiation is being received
-Mrem/hr

Question 7

Purpose and operation of Thermoluminescent dosimeter (TLD)

Answer 7

•Purpose
-Detects beta and gamma radiation
-Provides legal record
-Measures light when heated

Question 8

3 Methods used for limiting radiation exposure

Answer 8

-distance
-time
-shielding

Question 9

Purpose of radiation detection

Answer 9

-To know if radiation is there and the level of it.
-Provides inputs for other automatic functions

Question 10

Self reading pocket dosimeter
(Electric dosimeter)

Answer 10

-Detects gamma only
-Indicates dose and dose rate
-Audible alarm