ENDF-7.1 S(a,b) from MCNP6

Questions and discussion about applications, input, output and general user topics
Post Reply
hartanto
Posts: 15
Joined: Sun Oct 21, 2012 11:28 am
Security question 1: No
Security question 2: 92
Location: University of Sharjah

ENDF-7.1 S(a,b) from MCNP6

Post by hartanto » Tue Aug 05, 2014 4:51 am

Hello,

Is there any serpent user has ever used the ENDF-7.1 S(a,b) library from MCNP6 in Serpent?

I am currently converting the ENDF-7.1 library from MCNP so it can be used in Serpent. I don't have problems in converting the neutron reaction library, but I have a problem with the S(a,b). In my test problem, a CANDU fuel bundle model with uniform temperature of 300 K, the k-eff becomes unphysical when the s(a,b) is used in Serpent.
Picture1.png
Picture1.png (23.27 KiB) Viewed 1242 times
Thanks.

Davide Chersola
Posts: 55
Joined: Mon Feb 18, 2013 2:50 pm
Security question 1: No
Security question 2: 92
Location: Genova, Italia
Contact:

Re: ENDF-7.1 S(a,b) from MCNP6

Post by Davide Chersola » Wed Jan 07, 2015 5:17 pm

I have the same problem with a light water reactor: keff becames 0.4...

Davide
Davide Chersola, Ph.D.

User avatar
Jaakko Leppänen
Site Admin
Posts: 2202
Joined: Thu Mar 18, 2010 10:43 pm
Security question 2: 0
Location: Espoo, Finland
Contact:

Re: ENDF-7.1 S(a,b) from MCNP6

Post by Jaakko Leppänen » Sun Jan 11, 2015 11:27 am

Is this the same problem as what is reported here:

http://ttuki.vtt.fi/serpent/viewtopic.php?f=15&t=2120

There is no support for the continuous-energy S(a,b) format yet.
- Jaakko

Post Reply