safety
How does a pocket dosimeter work?
relies on ability of ionizing radiation to ionize a gas within a sealed chamber, resulting in a change of a charged electrode -discharging electrode.
How often are OSLD's read?
quarterly
what is the purpose of a monitoring device?
to monitor the maximum exposure to the operator.
when is radiation risk greatest to the pregnant abdomen?
first trimester
what is the cumulative effective dose limit?
10 mSv (1 rem) x age in years.
what is the best use for a pocket dosimeter?
short-term monitoring.
what material is used in an OSLD?
aluminum oxide
When should radiation monitors be worn?
if the radiation worker is at risk of receiving 10% of annual effective absorbed dose limit
what is the NCRP dose limit to the embryo/fetus?
0.5 mSv per month, 5 mSv total gestational period.
what is the annual effective dose limit for the general public?
0.5 rem (5 mSv)
what is a disadvantage of a pocket dosimeter?
prone to inaccurate reading with rough handling.
how is an OSLD read?
laser light reads sensing material which cause material to become luminescent in proportion to the exposure that the sensing material received.
How many badges are assigned to a pregnant technologist?
two (one at collar level, one at abdomen level).
what is the annual whole body occupational dose limit?
5 rem (50 mSv)
what is the annual dose equivalent for the general public to the lens of the eye, skin, and extremities?
5 rem (50 mSv)
can a pocket dosimeter be re-used?
yes, it can be recharged and re-used.
The filters of aluminum, tin and copper in an OSLD allow for determination of________?
energy levels striking the badge.
where is the abdomen badge worn?
under lead apron
what is the occupational exposure dose limit for the lens of the eye?
15 rem (150 mSv)
Does a pocket dosimeter provide an archival record?
no
outside of lead apron at collar level.
what does the abdomen badge measure?
dose to the abdomen and effectiveness of lead apron
what is the occupational exposure dose limit for all other areas (red bone marrow, breast, lung, gonads, skin, extremities)?
50 rem (500 mSv)