Dose Flashcards by Danilo Maziero

Q

Public Annual Limit

A

1mSv

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Q

Uncontrolled Area

A

0.02 mSv/hr

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Q

Lens of eye (Annual) - Public

A

15 mSv

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Q

Shallow Dose Eq Skin (Annual) - Public

A

50 mSv

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Q

Occupational Annual Limit

A

50 mSv

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Q

Controlled Area

A

0.1 mSv/hr

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Q

Lens of eye (Annual) - Occupational

A

150 mSv

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Q

Shallow Dose Eq Skin (Annual) - Occupational

A

500 mSv

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Q

Occupational for minors

A

10% of adult

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Q

Fetus declared pregnancy

A

5 mSv total / 0.5mSv/month

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Q

Radiation Area

A

0.05 - 1 mSv/hr @0.3m - signs required

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Q

High Radiation Area

A

> 1 mSv/hr @0.3m - restricted access - caution sign

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Q

Very High Radiation Area

A

> 5 Gy/hr @1m - alarms, signs and double interlocks

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Q

Average total effective dose per person

A

6 mSv

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Q

Average Background Effective Dose

A

3 mSv

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Q

Types of Background Radiation

A

Cosmic, terrestrial and internal exposure

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Q

Low level radiation

A

<10rem (100mSv)

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Q

High level radiation

A

> 10rem (100mSv)

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Q

Transportation Label - White 1

Study These Flashcards

A

@surface 0.5 mrem/hr @1m - nothing

Q

Transportation Label - Yellow 2

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A

@surface 0.5 - 50 mrem/hr @1m <1mrem

Q

Transportation Label - Yellow 3

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A

@suface: 50 - 200 mrem/hr

@1m 1 - 10mrem/hr

Q

Epilation

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A

3Gy - 17 days after

Q

Erythema

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A

6Gy - minutes to weeks

Q

Dry Desquamation

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A

12Gy

Wet Desquamation

25Gy - 3 weeks post

Radio necrosis - ulceration

50Gy

Transport Index

Measurement @1m mSv/hr x 100 (resulting mrem/hr)

Pregnancy - little risk

<5cGy - any gestational phase

Pregnancy - low/uncertain

5 - 10cGy

Pregnancy - significant risk (higher 1st trimester)

10-50cGy

Pregnancy - high risk (any trimester)

>50 cGy! Remember that 100cGy Kills 50% of fetus

Pregnancy - 1st week

Abortion

Pregnancy - 1-8 weeks

Malformation and growth retardation

Pregnancy - 8-15 weeks

Mental retardation and Small head syndrom

Pregnancy - 15-25 weeks

Mental retardation

Pregnancy - after 25 weeks

Cancer development

Dose to kill a cell

Dividing cell: 2Gy / non dividing cell: 100Gy

Do - dose that kill 63% of cells

1-3 Gy

Bone Marrow Syndrome

1-10 Gy

GI Syndrome

10-30 Gy

Central nervous system

>30 Gy

Mortality risk - High/low dose (workers)

8% / 4% per Sv

Mortality risk - High/low dose (general public)

10% / 5% per Sv

Dose - x-ray img

0.2 mrem

Dose - CT sim

10 mrem