Using TENDL 2017 in other energy bin structure

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marilia_savva
Posts: 4
Joined: Thu Oct 18, 2018 3:02 pm

Using TENDL 2017 in other energy bin structure

Post by marilia_savva » Mon May 13, 2019 11:45 am

Dear FISPACT developers and users,
We were trying to perform some simulations of a simple DT spectrum with different cross section libraries and different enerby bin structures, in order to get familiarized with the code. We have the neutron spectrum in 175 and 709 groups.
We selected the EAF 2010 with 175 and 69 groups structure and everything worked fine. Now, we are experimenting with the TENDL 2017 data library. Although everything is fine when running in 709 groups, it seems that we cannot get it right with less bins, for example 616 or 175 (our idea was to compare the output data in 175 groups between the TENDL and the EAF libraries). What we get in the .log file is "Fatal : endfmat_m:copy_xs_to_buffer: 1: endf file cross-section energy group boundary does not match standard value", as shown in the attached file. I am also attaching all our files.

Thus, I was wondering if there is indeed the possibility to use the TENDL 2017 library with an energy bin structure other than that of 709 groups.

Thank you in advance for your help,
Kind regards
Marilia Savva
Attachments
709 to 616.zip
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Thomas Stainer
Posts: 8
Joined: Fri Sep 22, 2017 9:03 am

Re: Using TENDL 2017 in other energy bin structure

Post by Thomas Stainer » Mon May 13, 2019 2:55 pm

Dear Marilia,

Thank you for your post.

Indeed the error states that your group structure must match that of the nuclear data library. We only provide TENDL 2017 in 709 group.

Note that group 709 extends the high energy part of 616 group and is refined around the 14 MeV region. Please observe the structures below.

709:
709_group.png
709_group.png (19.53 KiB) Viewed 1393 times
616:
616_group.png
616_group.png (18.01 KiB) Viewed 1393 times
If you wish to use TENDL 2017 then you can use the GRPCONVERT option to convert your flux from 616 to 709. Please see:
https://fispact.ukaea.uk/wiki/Keyword:GRPCONVERT

Kind regards,
Thomas
Thomas Stainer
United Kingdom Atomic Energy Authority
Culham Science Centre, Abingdon, OX14 3DB, UK
Tel. +44 (0)1235 466924
Email: thomas.stainer@ukaea.uk

marilia_savva
Posts: 4
Joined: Thu Oct 18, 2018 3:02 pm

Re: Using TENDL 2017 in other energy bin structure

Post by marilia_savva » Tue May 14, 2019 7:27 am

Dear Thomas,
Thank you very much for the prompt reply and the help!

Kind regards
Marilia

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