keff for all particles

User Support
1

hello…

i want values of keff for all particles, as i wanna produce a graph of keff vs number of source particles.

i am new to python , python API, and openmc.

i have gone through the openmc.model.Mode and openmc.search_for_keff.
i do not know whether i have to get statepoint file for each batches( or more) to get all Keffs or is there any other method.,.

thank you in advance…

2

Hi Sachin,

I’ve created an example notebook that shows how you can plot keff as a function of the number of particles per generation. The example uses a prebuilt model from the openmc.examples package.

Note that search_for_keff is intended for doing a criticality search, i.e., finding the value of a certain parameter (radius of a fuel pin, for example) that will result in a keff of 1.

Best,
Paul

3

thank you for the quick reply…

i ll try the things and get back with the results…

regards
sachin

4

i run the example successfully. it helped me to solve similar problems. thank you…

another help i want is:

  1. in openmc.statepoint we can get k_combined ,k_col_abs,
    like this can i get Keff estimated only by collision estimator (there is no option i found like k_collision)??
    or
    Do i have to tally the whole 6 factor formula by collision estimator and use it to get k_collision…!!!

(as it prints in display like k-effective (collision), i think there may be a option that i do not know.,.,.,.,.,.or else i include a print statement in sourcecode for it)!!!

the questions i ask may not be correct .,.

waitng for suggestions …

thank you

sachin

Screenshot from 2017-09-23 17-35-35.png
Screenshot from 2017-09-23 17-35-35.png1366×768 80.6 KB

5

i found out the k_collision which is in openmc.statepoint.global_tallies

thank you…

sachin shet

6

Good to hear! Good luck with the rest of your analysis!

7

Thank you Adam Nelson