Fatal error when using SSFCHOOSE with SSFMASS and PROBTABLE

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fthomas
Posts: 2
Joined: Fri Jan 20, 2017 1:13 pm

Fatal error when using SSFCHOOSE with SSFMASS and PROBTABLE

Post by fthomas » Thu Feb 23, 2017 5:04 pm

Hello all,

I am trying to generate SSFs as a function of energy for a series of nuclides in their elemental composition. Input and files file are included below. The reported error is:

00003: Fatal : ptable_m:mixture: 2:
SSFFUEL or SSFMASS keyword must be present for PROBTABLE to be used

SSFMASS and PROBTABLE are included, and the fatal error is generated with them in either order.

INPUT FILE

Code: Select all

<< -----collapse cross section data----- >>
CLOBBER
GETXS 1 709
PROBTABLE 1 1
SSFCHOOSE 1 1
  Ac225
SSFMASS 0.001 1
  Ac 100.0
FISPACT
* COLLAPSE tal2015-n/gxs-709 with tp-709-294
END
* END OF RUN
FILES FILE

Code: Select all

# gamma attenuation data
absorp  /opt/FISPACT-II-3-20/ENDFdata/decay/abs_2012
# index of nuclides to be included
ind_nuc  /opt/FISPACT-II-3-20/ENDFdata/TENDL2015data/tendl15_decay12_index
# Library cross section data
enbins /opt/FISPACT-II-3-20/ENDFdata/ebins/ebins_709
xs_endf /opt/FISPACT-II-3-20/ENDFdata/TENDL2015data/tal2015-n/gxs-709
# Library probability tables for self-shielding
prob_tab  /opt/FISPACT-II-3-20/ENDFdata/TENDL2015data/tal2015-n/tp-709-294
#fluxes
fluxes  fluxes
arb_flux  spectra
# Library decay data
dk_endf /opt/FISPACT-II-3-20/ENDFdata/decay/decay_2012
# Library fission  data
fy_endf /opt/FISPACT-II-3-20/ENDFdata/TENDL2015data/tal2015-n/gef52_nfy
# Spontaneous fission data
sf_endf /opt/FISPACT-II-3-20/ENDFdata/TENDL2015data/tal2015-n/gef52_sfy
# Library regulatory data
hazards /opt/FISPACT-II-3-20/ENDFdata/decay/hazards_2012
clear   /opt/FISPACT-II-3-20/ENDFdata/decay/clear_2012
a2data  /opt/FISPACT-II-3-20/ENDFdata/decay/a2_2012
# collapsed cross section data (in and out)
collapxi  COLLAPX
collapxo  COLLAPX
# condensed decay and fission data (in and out)
arrayx  ARRAYX
Maybe it's not a bug and I've misinterpreted the manual.

Any help much appreciated,

Fred

User avatar
Michael Fleming
Posts: 22
Joined: Thu Sep 08, 2016 10:51 am

Re: Fatal error when using SSFCHOOSE with SSFMASS and PROBTABLE

Post by Michael Fleming » Fri Feb 24, 2017 3:43 pm

Hello Fred,

Thanks for contacting us through the forum.

You have selected a case where there is no natural elemental composition (Actinium) that FISPACT-II can rely upon to use in the self-shielding calculation. For these elements, or in general where a non-natural isotopic mixture is required, you must use the SSFFUEL keyword (http://fispact.ukaea.uk/wiki/Keyword:SSFFUEL).

There are examples of SSFMASS calculations within the fispQA folder under Tst_709pt and testresults are also provided in the standard distributions.

The error message in this case is not as helpful as it could be. We will look into adding a new message to guide users in this situation.

Best regards,
Michael
Michael Fleming, PhD
D3/1.56 Culham Science Centre
UK Atomic Energy Authority
Abingdon, OX14 3DB
+44 (0) 1235 466884
michael.fleming@ukaea.uk

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