Re: Japan to switch to MOX?OX?X?X?OX?

[dwayne.gardner@po.state.ct.us]

Pu-240 and Pu-242 have neutron absorption cross-sections of >1000 barns as 
do 239 and 241. Pu-238 is in the 500 to 1000 range (540 if I'm reading my 
Chart of the Nuclides correctly).

Dwayne Gardner
dwayne.gardner@po.state.ct.us
 ----------
From: radsafe@romulus.ehs.uiuc.edu
Subject:   Re: Japan to switch to MOX?OX?
Date: Thursday, January 23, 1997 6:57PM


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From: azapantis@mgdestmx01.erin.gov.au
To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
Subject: Re[2]: Japan to switch to MOX?
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X-Comment:  Radiation Safety Distribution List

Correct, ie that is NOT true. Pu-239 and 241 are fissile. Pu-238 is not. I'm
not
sure about the other Pu isotopes but I suspect that they are also not 
fissile.
Can anybody give a definitive answer?
____________________________________________________________________________  
___
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Subject: Re: Japan to switch to MOX?
From:    radsafe@romulus.ehs.uiuc.edu at mgdestmx01
Date:    23/1/97  5:21 PM

Erik C. Nielsen wrote:
 For the full
> story, see http://www.merc.com/stories/cgi/story.cgi?id=1208803-116

Another statement in the full story is: "Japan had about 4.7 tonnes of
plutonium at the end of 1993, of which some 3.4 tonnes are likely to be
fissile, according to latest government figures available."

I was told that ALL isotopes of plutonium are fissile.  Is that not
true?  Al Tschaeche xat@inel.gov

Alex Zapantis
Environmental Radiation Officer
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