[ RadSafe ] SCBA and beta dose connection?

[JOHN.RICH at sargentlundy.com]

I have a document in front of me that states, " IF SCBAs are used, the 
beta dose rates may be neglected."  The context is in a post -accident 
mission dose determination where the effect of SCBAs is discussed. I'll 
admit my ignorance on this one.  Does anybody know where this came from or 
what would support it?

thx in advance  - -jmr

John Rich
312-269-3768