--On Thursday, October 09, 2014 5:07 AM -0400 Craig Haynie <[email protected]> wrote:
It does look like the system ran until its fuel was exhausted. "The unused fuel shows the natural isotope composition from both SIMS and ICP-MS, i.e. 58 Ni (68.1%), 60 Ni (26.2%), 61 Ni (1.1%), 62 Ni (3.6%), and 64 Ni (0.9%), whereas the ash composition from SIMS is: 58 Ni (0.8.%), 60 Ni (0.5%), 61 Ni (0%), 62 Ni (98.7%), 64 Ni (0%), and from ICP-MS: 58 Ni (0.8%), 60 Ni(0.3%), 61 Ni (0%), 62 Ni (99.3%), 64 Ni (0%)." Craig
They only analyzes a few grains of the ash. I doubt that the ash is homogenous & isotropic so it is likely incorrect to assume that system ran to exhaustion.
Maybe the ash is predominately spent fuel while most of the fuel remains active.
Ron
