SCALE Software Coordinator
This topic has been migrated from the SCALE 5 ORIGEN notebook.
Date: Fri Jun 4 15:11:58 2010
Hi,
I am an amateur in ORIGEN-ARP. Please pardon my naive questions. I used ORIGEN-ARP for typical irradiation of LWR cases, followed by decay cases very easily. To be more specific, I was calculating the radiotoxicity of the SNF. However, I also need to perform radiotoxicity calculations after, say a certain reprocessing. I need to change the composition of spent fuel based on the reprocessing it went through. My question is how do I perform radiotoxicity or Activity calculations of a spent fuel of a certain composition after a certain time of decay using ORIGEN-ARP? I am aware that in ARP I have to perform irradiation first. How can I skip that?
Also, if ORIGEN-ARP is not capable of decay calculations by itself, what else would you advice me to use? Thanks a lot in advance.
Yasir
SCALE Software Coordinator
If you know the initial composition you can simply use the detailed input form to specify the compositions manually using the compositions form [comps] and then add a decay case [cases]. For spent fuel, the number of input nuclides could be very large. If you know the chemical separations fractions, you can apply them to remove the elements and fractions in any of the decay cases, after your irradiation case. See the decay form toolbar button [n/m Element]. These fractions are applied to prior to the decay case and can be used to assess the radiotoxicity and other values for a separation stream. For more information on the Element fractions option, use the Help menu and search on topic "element". We plan to publish a primer shortly on OrigenArp that has more examples.
Sincerely
Ian Gauld