Radiation Safety NMTCB Practice
Film badge - ANSWER--Effective measuring radiation of .1 msv (10rem) to several
sieverts
-worn between waist and shoulder
Thermoluminescent Dosimeters - ANSWER--ring badge
-keep out of humidity and high temperature
-contains lithium fluoride
Optically stimulated luminescence dosimeters - ANSWER--resistant to heat, moisture,
and aging
-contains aluminum oxide
Pocket Ionization Chambers - ANSWER--expensive
-immediate radiation measurements
RAD - ANSWER--radiation absorbed dose
-SI unit= Gray
Roentgen - ANSWER--exposure in air
-SI unit= Coulombs per kg
REM - ANSWER--occupational exposure (radiation equivalent man)
-SI unit= Seivert
Curie - ANSWER--actual amount of radioactivity
-SI unit= Bequerel
Caution: Radioactive Materials (sign) - ANSWER--Where radioactive materials are used
or stored
-Usually in entrances of labs or depts
Caution: Radiation Area (sign) - ANSWER--Where individual can receive more than .05
msv (5rem) in 1 hour
-Seen in entrances to nuc med labs
Caution: High Radiation Area (sign) - ANSWER--Individual can receive more than 1msv
(100rem) in 1 hour
-Commonly where radiation therapy is performed
, Grave Danger: Very High Radiation Area (sign) - ANSWER--Individual can receive an
absorbed dose of more than 5 gy (500rad) in 1 hour
-Not usually in hospital setting
Unrestricted area - ANSWER--Individual can receive less than .02 msv (2rem) in 1 hour
-(example, reception and waiting area)
Inverse square law (distance) - ANSWER-By doubling the distance the radiation dose
rate is reduced to 1/4 of the original
Inverse square law (distance) equation - ANSWER-(Intensity 1)(Density 1)^2=(Intensity
2)(Density2)^2
NRC Occupational exposure of Whole body - ANSWER-50 msv/year
5 rem/year
NRC Occupational exposure Lens of eye - ANSWER-150 msv/year
15 rem/year
NRC Occupational exposure of organ or tissue - ANSWER-500 msv/year
50 rem/year
NRC Occupational exposure of skin or extremity - ANSWER-500 msv/year
50 rem/year
NRC Occupational exposure of general public - ANSWER-1 msv/year
.1 rem/year
NRC Occupational exposure of fetus exposed worker - ANSWER-5 msv/year
.5 rem/year
DOT White 1 - ANSWER--Surface no more than .5 mR/hr
-1 meter (3ft) no detected radioactivity
DOT Yellow 2 - ANSWER--Surface no more than 50 mR/hr
-1 meter (3ft) no more than 1 mR/hr
DOT Yellow 3 - ANSWER--Surface no more than 200 mR/hr
-1 meter (3ft) no more than 10 mR/hr
Highest amount of the activity which can be counted accurately in the well counter is -
ANSWER-10^-6 Ci
Film badge - ANSWER--Effective measuring radiation of .1 msv (10rem) to several
sieverts
-worn between waist and shoulder
Thermoluminescent Dosimeters - ANSWER--ring badge
-keep out of humidity and high temperature
-contains lithium fluoride
Optically stimulated luminescence dosimeters - ANSWER--resistant to heat, moisture,
and aging
-contains aluminum oxide
Pocket Ionization Chambers - ANSWER--expensive
-immediate radiation measurements
RAD - ANSWER--radiation absorbed dose
-SI unit= Gray
Roentgen - ANSWER--exposure in air
-SI unit= Coulombs per kg
REM - ANSWER--occupational exposure (radiation equivalent man)
-SI unit= Seivert
Curie - ANSWER--actual amount of radioactivity
-SI unit= Bequerel
Caution: Radioactive Materials (sign) - ANSWER--Where radioactive materials are used
or stored
-Usually in entrances of labs or depts
Caution: Radiation Area (sign) - ANSWER--Where individual can receive more than .05
msv (5rem) in 1 hour
-Seen in entrances to nuc med labs
Caution: High Radiation Area (sign) - ANSWER--Individual can receive more than 1msv
(100rem) in 1 hour
-Commonly where radiation therapy is performed
, Grave Danger: Very High Radiation Area (sign) - ANSWER--Individual can receive an
absorbed dose of more than 5 gy (500rad) in 1 hour
-Not usually in hospital setting
Unrestricted area - ANSWER--Individual can receive less than .02 msv (2rem) in 1 hour
-(example, reception and waiting area)
Inverse square law (distance) - ANSWER-By doubling the distance the radiation dose
rate is reduced to 1/4 of the original
Inverse square law (distance) equation - ANSWER-(Intensity 1)(Density 1)^2=(Intensity
2)(Density2)^2
NRC Occupational exposure of Whole body - ANSWER-50 msv/year
5 rem/year
NRC Occupational exposure Lens of eye - ANSWER-150 msv/year
15 rem/year
NRC Occupational exposure of organ or tissue - ANSWER-500 msv/year
50 rem/year
NRC Occupational exposure of skin or extremity - ANSWER-500 msv/year
50 rem/year
NRC Occupational exposure of general public - ANSWER-1 msv/year
.1 rem/year
NRC Occupational exposure of fetus exposed worker - ANSWER-5 msv/year
.5 rem/year
DOT White 1 - ANSWER--Surface no more than .5 mR/hr
-1 meter (3ft) no detected radioactivity
DOT Yellow 2 - ANSWER--Surface no more than 50 mR/hr
-1 meter (3ft) no more than 1 mR/hr
DOT Yellow 3 - ANSWER--Surface no more than 200 mR/hr
-1 meter (3ft) no more than 10 mR/hr
Highest amount of the activity which can be counted accurately in the well counter is -
ANSWER-10^-6 Ci
