re: 2 mr in an hour limit

[carol marcus <csmarcus@ucla.edu>]

At 02:27 PM 7/6/99 -0500, you wrote:
>
>>
>>For I-131 inpatients that has been administered therapeutic dose, does the
>>2-mrem/hr limit for the general public apply in the adjacent room?  
>>
>>Thanks in advance for your assistance.
>>
>>Malek Chatila
>>American University of Beirut
>>
>
>Sure does.  When I worked at the VA, we used to leave the adjacent room
>vacant.  We also had to use shields occasionally for the first day post
>admin..  Oh, and the limit is 2 mrem in any hour, which is different than 2
>mr/hr (dose compared to dose rate).  This may or may not be important
>depending on the size of the room, the amount of time the patient is near a
>boundary, etc..
>
>Patrick Muldoon, CHP
>pmuldoon@mail.arc.nasa.gov
>
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Dear Radsafers:

The 2 mrem in any hour limit does not apply when the radioactivity is in the
patient.  The 500 mrem rule applies instead, and the 2 mrem/hr limit was
changed in that rulemaking.

Ciao, Carol

Carol S. Marcus, Ph.D., M.D.
Harbor-UCLA Medical Center
<csmarcus@ucla.edu>

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