[ RadSafe ] Sr-90 Question
GEOelectronics at netscape.com
Wed Oct 17 09:49:00 CDT 2007
Are you trying to determine the Transportation Index? If for some other
purpose, please state it.
Sr-90 is a pure beta emitter, and so is the daughter Y-90. Technically there
can be no amount that gives *ANY* mR/hr reading at any distance.
Let us know the purpose of the measurement and we can then
pin down the activity and correct units of measurment.
New London Nucleonics Lab
----- Original Message -----
From: "MCCORMICK, LUKE I" <luke.mccormick at dhs.gov>
To: <radsafe at radlab.nl>
Sent: Tuesday, October 16, 2007 9:11 AM
Subject: [ RadSafe ] Sr-90 Question
Can anyone tell me about how much Sr-90 I would need to get a reading of
0.5 mR/hr at 1 meter? I know that if you go by the rule of thumb (300
R/hr at 1 cm per mCi) you should need around 330 micro-Curies. Can
anyone tell me how close this estimate is?
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