Practice Exam #4 24-33 Flashcards
Which of the following isotopes is not a major source of exposure following a rupture of a used fuel rod that was just removed from the core.
Co-60
Which of the following individuals would receive the most dose breathing airborne radioactive material.
Worker 1 was in a room breathing 1 DAC of Iodine
131 (2.0 E-8) for one hour.
Worker 2 was in a room breathing 1 DAC of Co-60 (7.0 E-8) for one hour.
Both workers would receive the same amount of dose
Which of the following statement best describes inelastic scattering interactions of neutrons.
Some kinetic energy of the neutron is changed to excitation energy of the nucleus which emits a gamma photon
The Relative Biological Effectiveness (RBE) of alpha radiation is the same as that of beta or gamma. The impacts to a cell are the same no matter what type of radiation is involved.
False
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?
1 curie
Stellite is used in nuclear power plants in valve seats, pump seals and control rods to reduce wear between two metals surfaces.
Which of the following elements listed below contain stellite, and when exposed to a neutron flux in the reactor core, can become a major source of exposure for workers?
Co-59
Radioactive material that has been deposited in the pores of an item, and physically migrates to the surface over time, and appears as loose surface contamination, is a description of which of the following?
Fixed contamination
On the chart of the nuclides, how would a stable isotope be denoted?
The block would be gray in color
Radiation induced cataracts is an example of stochastic effects?
False
Effects of radiation exposure that occur by chance, without a threshold level of dose, whose probability is proportional to the dose received, is definition of which
of the following?
Stochastic effect
