radiological Flashcards

1
Q

what is radioactivity?

A

is the property of radiation emission of a unstable atom to achieve its stable state

process referred to as transformation, decay or disintegration of an atom

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2
Q

what are the 4 types of ionizing radiation?

A

alpha particle
beta particle
gamma ray
neutron particle

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3
Q

what is acute radiation syndrome?

A
high exposure over short period of time
onset of symptoms from hrs to days
three main cate of symptoms
- hematopoietic
- gasintrointestinal
- neurovascular
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4
Q

what is the occupational exposure limit?

A

20 mSv per year avg over 5 years
100mSv in 5 years
max of 50mSv per year

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5
Q

what is the public exposure limit?

A

1 mSv per year

avg over 5 years

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6
Q

what is the saf operational exposure?

A

250mSv cummulative lifetime limit
saf campaign commander can approve up to a max. of 750mSv

nothing more

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7
Q

what is saf training exposure?

A

up to 1mSv per year

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8
Q

what is the ALARA principle?

A

as low as reasonably achievable

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9
Q

what are the 3 principles of radialogical defense?

A

time - min exposure
distance - inverse sq law
shielding - thin layer lead gamma / water concrete neutron

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10
Q

what are the 2 non-coventional mode of delivery?

A

red - radiological exposure device

rdd - radiological dispersal device

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