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RE: Pu Toxicity vs DDT
Thanks to both you and Jay for checking the numbers for me. Please
allow me to add one more thought to this.
We in DP have been looking at doses that can lead to acute fatality for
application in radiological sabotage analyses. From that study, based
upon ICRP-60 and others, we estimate that an acute dose of 500 rads to
the GI tract has around a 50% lethality. With alpha emitters, an RBE of
7 is applied, resulting in a 50% lethal dose of 71 rads. Assuming the
majority of the dose to the GI tract is delivered in 24 hours or so,
(whatever the normal clearance rate is - I don't have it before me know)
it is obvious to me that we are in the range of interest.
I too would prefer to figuratively rather than literally pass on this
stuff :-)
Doug Minnema, CHP
DOE/DP
<Douglas.Minnema@ns.doe.gov>
what few thoughts i have are truly my own.
> -----Original Message-----
> From: Lieskovsky, Miro [SMTP:MLieskovsky@nbpower.com]
> Sent: Thursday, January 28, 1999 3:10 PM
> To: Multiple recipients of list
> Subject: RE: Pu Toxicity vs DDT
>
> Radsafers:
>
> Being no expert in Pu, just for the curiosity, here is the compiled
> data using the iaea ss-115, table ii-vi. (an infant of less than 1
> year):
>
> Pu Isotope T1/2 eg decay constant
> Activity Dose
> years Sv/Bq s-1
> Bq.g-1 Sv
> 238 87.7 4.00E-06 2.5E-10
> 6.3E+11 3E+06
> 239 2.40E+04 4.20E-06 9.2E-13
> 2.3E+09 1E+04
> 240 6.50E+03 4.20E-06 3.4E-12
> 8.5E+09 4E+04
> 241 14.4 5.60E-08 1.5E-09
> 3.8E+12 2E+05
> 242 3.80E+05 4.00E-06 5.8E-14
> 1.4E+08 6E+02
>
> The committed effective doses per ingestion of 1g of Pu isotopes
> 238-242
> range from 600 to 3 000 000 Sv for an infant. Others are similar.
>
> I do not know what kind of assumptions one should use for the
> committed
> doses because of the acute effects or whatever else, but I for one do
> not want to swallow any of that stuff.
>
> yep, this is not "just for a chat" issue by all means.
>
> regards,
>
>
> Miroslav Lieskovský
> Health Physicist
> NB POWER - PLGS - HP Dep't
> PO BOX 10, Lepreau, NB, Canada, E0G 2H0
> tel. (506) 659 7421, fax. (506) 659 6507
> mlieskovsky@nbpower.com
>
>
>
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