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RE: query

Bernie



I never thought there was a good reason for the difference. I thinks that's

why the "up-to-date" numbers in Table E.1 of ICRP Publication 68 are 5 x E-5

for all compounds of Am and 5 x E-5, 1 x E-4 and 1 x E-5 for unspecified

compounds of Pu, Pu nitrates and insoluble Pu. That is, only unspecified

compounds of Pu and Am have the same values. My limited experience tells me

that this is better than it used to be.



John

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-----Original Message-----

From: owner-radsafe@list.vanderbilt.edu

[mailto:owner-radsafe@list.vanderbilt.edu]On Behalf Of Bernard Cohen

Sent: June 29, 2004 7:30 AM

To: radsafe@list.vanderbilt.edu

Subject: query





ICRP Publication 30 gives the absorption thru the G-I tract into the

blood stream, f1, to be 5 times higher for Americium than for Plutonium;

5E-4 for Am and 1E-4 for Pu. Does anyone know if these values are

up-to-date? What is the explanation for this big difference?



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