[ RadSafe ] Spent nuclear fuel: Graph of gamma vs. time for the first 1000 yrs
blc+ at pitt.edu
Wed Nov 9 09:37:43 CST 2005
All of this info and much, much more is in:
Croff AG and Alexander CW. Decay characteristics of once through LWR and
LMFBR spent fuels, high level wastes, and structural material wastes.
Oak Ridge National Laboratory Report ORNL/TM-7431;1980
A plot of what you ask for is in Fig. 8 of my paper "High level
waste from light water reactors, Reviews of Modern
Physics 49: 1-20;1977. Cs-137 is dominant, but others are Cs-134,
Rh-106, Pr-144, and Co-60.
Bjorn Cedervall wrote:
> Dear Radsafers,
> I wonder if anyone could point at a graph showing the total of the
> most important gamma and beta (90Sr essentially I believe.) in spent
> nuclear fuel. This is not about the risks as described by dilution in
> The example could come from some typical BWR or PWR plant.
> Which gamma emitting radionuclides must be considered besides cesium
> 137 say in the time interval 40 yrs (taken as time for long term
> storage) to 1000 yrs?
> Are there any other dominating beta emitting radionuclides besides Sr 90.
> If there are just a few dominating gamma radionuclides, please then
> give them in their approximate relative proportions from time "zero"
> or after say 40 yrs.
> Any help will be much appreciated.
> Best regards,
> Bjorn Cedervall bcradsafers at hotmail.com
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