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33 Cards in this Set
- Front
- Back
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Minor spill how many mCi?
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<1mCi
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Major spill how many mCi?
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>1mCi
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In what direction is a RA spill cleaned up?
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Outside in
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Until what point is a minor spill cleaned up uintil?
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Until it is background and no more can be cleaned up
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If it is a high level spill what steps are taken different than low level?
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Shield area and let RA decay, then proceed with low level steps
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Does the RSO need to be contacted for a minor spill?
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Yes, RSo contacted fr all spills
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What does a spill report have in it?
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Decribes accident, steps taken, personell involved, and survey/wipe readings
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4 methods of RA disposal
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1. Sewage
2. Storage 3. Incineration 4. Transfer |
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Dose limit for sanitary sewage
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dose < or = 0.5rem or <1Ci/yr
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What half life limit is there for storage of RPs?
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<120 days
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How many physical half lives are required for RP to decay before it is background and able to be thrown out?
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10 physical half lives
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How long must records be kept for storage, bioassays?
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3 years
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What is recorded for decay in storage?
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date disposed, survey instrument used, bkg, rad @ surface, who did the survey
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Who must approve incineration of RPs?
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NRC
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What type of RN's are usually transferred?
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Long-lived isotopes
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What frequency is the radiation protection program reviewed?
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Annually
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Radiation safety committee must have how many people and meet how often?
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3 ppl
quarterly mtg |
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A written directive is needed for?
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1. brachytherapy
2. >30uCi I125, 131 3. other RPs for Therapy |
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At what level must pt be kept in hospital?
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<5mR/hr. @1m and <30mCi
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What dose can pt leave hospital without instructions?
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<1mSv (.1rem)
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What dose can pt leave hospital with instructions?
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>1mSv (.1rem)
3 year record |
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In hospital therapy what to do to room?
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Cover all surfaces wtih absorbant paper
wrap touchables designated waste contaner post "radiation materials" sign Survey when pt leaves (<200dpm.100cm^2) |
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Why put 131-I in a fume hood
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It's volatile
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Must bioassay thyroid if I-131 is prepped for what amounts in what type of container
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>1mCi open bench
>10mCi fume hood >100mCi glove box |
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How soon should the thyroid be assayed after I-131 prep?
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within 3 days
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The amount the thyroid takes up is called the ?
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Thyroid Burden
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Amt of the 3 levels of bioassay uptake?
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1. Evaluate:0.133uCi
2. Investigate 1: .133-.665uCi 3. investigate 2: >.665uCi |
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Max ALI to thyroid, WB and individual organs for bioassay?
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Thyroid-50uCi
WB- 5rem ind. organs- 50rem |
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How often is a sealed source tested?
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every 6 months
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What is max limit leak for sealed source?
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<0.005uCi
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If sealed source is >0.005uCi what should be done.
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report to NRC , withdraw source, store, repair or dispose
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How many days must a sealed source leak be report to NRC within?
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5 days
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When do you not have to do a leak test on a sealed source?
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Half life <30days
Gas <,= 100uCi beta/gamma emit In storage (need to transport though) |
