Radation Protection Flashcards
exposure monitoring of personnel is requried whenever radiation workers are likely to risk receiving what percentage of annual occupational EfD limit of 50 mSv (5 rem)?
10% or more
what is the most common type of monitoring device for occupational exposure?
TLD
what dosimeter contains an aluminum oxide detector?
OSL
how low of an accurate reading can an OSL produce?
as low as 1 mrem
which dosimeter is more sensitive between an OSL and TLD
OSL
which dosimeter is most common for personnel monitoring?
OSL
which monitoring device is the least inexpenisve?
film badge
what are the point of metal filters in film badges?
detect different kind of radiations (penetrating or nonpenetrating)
what is a TLD composed of?
lithium fluoride
what is the most senestive type of personnel dosimeters?
pocket ionization chamber
what is a pocket ionization chamber composed of?
two electrodes, one positively charged and one negatively charged
when do somatic effects become evident?
in the irradiated individual
how is exposure unit determined?
ionization in the air
how many millisievert are in one sievert?
1000
what are 2 general types of radiation detection devices?
field survey and personnel monitoring
what is primary beam referred to after it passes through the beam restricing device?
useful beam
which xray interaction occurs most often w xray energies over 100 kev?
compton effect
the fact that some materials can store energy, then emit light when heated, is the principle that is used for which dosimeter?
TLD
what is equal to 1 joule per kilogram?
gray
what measures the rate @ which energy is trasnferred from radiation to soft tissue?
LET
