Practice Exam #3 36-47 Flashcards
The Relative Biological Effectiveness, RBE, for alpha is higher due to the high linear energy transfer (LET) of an alpha particle with matter. What is the RBE for alpha particles from the list below?
20
Which of the items listed below best describes the reason alpha particles are an internal exposure concern?
Internally the alpha particle is surrounded by living tissue and the high specific ionization can result in more damage in the organ or tissue.
What is the best definition for cross-contamination?
Uncontrolled spreading of radioactive contamination to people or other places.
What are some of the factors that can determine if contamination is fixed or loose contamination?
Physical form of the contaminant
The process where radioactive material that has been deposited in the pores of an item physically migrates to the surface is a description of _____________.
Loose surface contamination
One of the major sources for contamination is leaks from radioactive systems in the plant which can occur at pipe flanges, valves or pump seals. True or False?
True
How are samples of radioactive airborne particulates collected?
Pulling a known volume of air through filter media
Noble Gas samples are collected using a specific volume container, but the others are sampled by capture methods. A known volume of air is directed through filter or capture media to determine a concentration per unit volume. True or False?
True
The purpose of using step-off pads (SOP) is which of the following?
- Provide a boundary between clean and contaminated areas
2. Provide an access point
Items that could be contaminated are required to bagged and labeled/tagged before they are removed from a contaminated area. True or False?
True
Which of the following isotopes is a noble gas that is result of the fission process in nuclear power plants?
Xenon
