RE: [fluka-discuss]: USRYIELD two-way vs. one-way

From: REDDELL, BRANDON D. (JSC-EV511) <"REDDELL,>
Date: Mon, 10 Mar 2014 23:28:16 +0000

Attached is an input file to illustrate the problem I am having. I have an RPP region divided in half and looking at the forward and backward fluxes across the surface at the middle. When I run this simulation my proton and neutron distributions are exactly the same. Also, I am seeing similar phenomena with the USRBDX distributions. So, can someone please tell me what I am doing wrong here?

Thanks,
Brandon


From: me_at_marychin.org [mailto:me_at_marychin.org]
Sent: Sunday, March 09, 2014 8:46 PM
To: fluka-discuss_at_fluka.org; REDDELL, BRANDON D. (JSC-EV511)
Subject: Re: [fluka-discuss]: USRYIELD two-way vs. one-way

Hi Brandon,
Swapping the upstream and downstream regions generally would not produce the same results. Is there any corresponding symmetry of some sort in your set up?
Cheers,
mary
On 08 March 2014 at 05:35 "REDDELL, BRANDON D. (JSC-EV511)" <brandon.d.reddell_at_nasa.gov<mailto:brandon.d.reddell_at_nasa.gov>> wrote:
Hello,

I recently performed a simulation and used the USRYIELD card to get the double differential spectrum crossing a boundary defined by reg1 and reg2. I swapped the upstream and downstream assignments in WHAT(4) and WHAT(5) expecting different results to get both forward and backward estimates. I got the same results in both cases. Can someone tell me if this is the expected result? In the past, I was under the impression that it would give me forward or backward double differential scoring and not just the total.

I am aware that I can use USRBDX to do this same problem.

Thanks,

Brandon





Received on Tue Mar 11 2014 - 01:52:03 CET