RADIATION SAFETY NMTCB PRACTICE
QUESTIONS AND ANSWERS 100%
VERIFIED
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
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
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
What is the maximum acceptable hourly exposure for a radiation occupational worker -
ANSWER-2 mR/hr
All packages containing non-gaseous radioactive materials must have a wipe test done.
What is the area to be wiped - ANSWER-300cm^2
The annual exposure maximum for an occupational radiation worker - ANSWER-50 msv
1msv = ? mrem - ANSWER-100
Personnel must survey what parts of their body before leaving facility? - ANSWER-feet
and hands
Procedure for minor spills - ANSWER--notify personnel
- contain spill with absorbent
-remove any contaminated clothing and wash skin
-wear gloves and shoe covers
-place materials into plastic bags
-use survey meter and wipe test
-label bags
-report to RSO
Procedure for major spills - ANSWER--clear area and notify personnel
-absorbent paper to prevent spreading
-limit movement of contaminated personnel and remove contaminated clothing
- evacuate, close, and lock all doors to area
-notify RSO, cleanup and decontaminate under RSO supervision
QUESTIONS AND ANSWERS 100%
VERIFIED
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
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
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
What is the maximum acceptable hourly exposure for a radiation occupational worker -
ANSWER-2 mR/hr
All packages containing non-gaseous radioactive materials must have a wipe test done.
What is the area to be wiped - ANSWER-300cm^2
The annual exposure maximum for an occupational radiation worker - ANSWER-50 msv
1msv = ? mrem - ANSWER-100
Personnel must survey what parts of their body before leaving facility? - ANSWER-feet
and hands
Procedure for minor spills - ANSWER--notify personnel
- contain spill with absorbent
-remove any contaminated clothing and wash skin
-wear gloves and shoe covers
-place materials into plastic bags
-use survey meter and wipe test
-label bags
-report to RSO
Procedure for major spills - ANSWER--clear area and notify personnel
-absorbent paper to prevent spreading
-limit movement of contaminated personnel and remove contaminated clothing
- evacuate, close, and lock all doors to area
-notify RSO, cleanup and decontaminate under RSO supervision
