Statistical test

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BBRider
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Statistical test

Post by BBRider » Fri Sep 04, 2015 3:04 pm

Hi,

I'v read a paper about statistical tests in Sepent 2 (http://montecarlo.vtt.fi/download/VTT-R-00371-14.pdf), but is can't find how to use these options. It says "The statistical tests are performed automatically for the analog, implicit and collision
estimates of kef.." but there is no “<input>_stat.m” file generated by Serpent. Is there any way to get statistical test results?

I would like to find out how many inactice cycle needed for source convergence.

Thanks,
Bálint

Toni Kaltiaisenaho
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Re: Statistical test

Post by Toni Kaltiaisenaho » Fri Sep 04, 2015 4:16 pm

Hi,

You have to use the dhis option with a detector to active the tests. You can use a dummy detector like

Code: Select all

det 0 dhis 1
if you only want to test the keff. Note that the tests are performed only on active cycles, and they might not help you for detecting source convergence, depending on your case.

BBRider
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Re: Statistical test

Post by BBRider » Fri Sep 04, 2015 4:29 pm

Hi,

Thanks for your reply, i will try that.
I run the same script twice, only modifying parameters for group constant generation and i don't get the same keff within statistic error. I guess the problem is source convergence. Is there any way to test that?

Best wishes,
Bálint

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Jaakko Leppänen
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Re: Statistical test

Post by Jaakko Leppänen » Sat Sep 05, 2015 12:24 pm

Add

Code: Select all

set his 1
in the input file, and you'll get an output file <input>_his0.m which contains the fission source entropies in x-, y- and z-directions.
- Jaakko

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