Add energy group structures: SCALE-999, MGB (FOMG-16k, VESTA-43k) #3564
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Addition of SCALE-999 energy group. Is commonly used with Advantg MSX-Origen (datafile: origen.rev01.jeff999g) Group structured used with the Origen general activation library JEFF-3.0/A
…tructures to calculate reaction rates with the multi-group binning (MGB) method. https://fispact.ukaea.uk/wp-content/uploads/2016/07/snamc2013_05203.pdf https://etheses.whiterose.ac.uk/id/eprint/4427/1/PhD_Thesis_Corrected_FINAL_FINAL_3_9_13.pdf To-Do: add VESTA-43k energy structure I believe I have followed the description of the structure as best I could: "The optimal binning structure, named FOMG ( Fusion Optimised Multi Group) is split into three distinct sections. The thermal energy region is defined in the range 10−5eV ≤ EL < 1 eV with 1,000 bins and an energy width of 1.0 meV. The mid energy group is defined in the range 1 eV ≤ EL < 2 MeV with14,000 bins and a lethargy width of 1.036 × 10−3. The high energy group is defined in the range 2 MeV ≤ EH < 19.6 MeV with 1,000 bins and an energy width of 17.6 keV."
VESTA-43k LWR Optimized MGB energy structure https://www.osti.gov/etdeweb/servlets/purl/20902503 https://roma.sckcen.be/ws/portalfiles/portal/4558859/An_Optimum_Approach_to_Monte_Carlo_Burn_Up.pdf https://rsicc.ornl.gov/codes/ccc/ccc7/ccc-769.html https://www.tandfonline.com/doi/abs/10.13182/NSE07-A2695 Not sure how ppl might want to handle the copious data, columnes, digits... These are the raw full sig figs as used in VESTA
Missing comma at end of line in VESTA-43k
paulromano
requested changes
Sep 5, 2025
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Not super sure how to do that, but that seems reasonable. |
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Description
Adds SCALE-999 energy group.
This is frequently used in Origen for general purpose activation with the JEFF-3.0/A library.
Adds FOMG-16k and VESTA-43k.
These are useful for multi-group binning (MGB) activation calculations where a fine energy structure is important, but a fine reaction-rate calculation in the neutron transport would be too slow.
SigFigs: I have followed the exact VESTA precision, and favoured high precision for the FOMG numbers.
But I could see why others might have different opinions on the formatting or number of values per row, etc. (Being that there are so many bins)
SCALE-999
https://www.ornl.gov/sites/default/files/2020-05/Pub%20ID%2058284%20-%20PHYSOR2016_SCALE62_Origen_extended_summary_v5_final.pdf
https://www.nrc.gov/docs/ML1218/ML12184A002.pdf
https://info.ornl.gov/sites/publications/Files/Pub67728.pdf
FOMG-16k
https://fispact.ukaea.uk/wp-content/uploads/2016/07/snamc2013_05203.pdf
https://etheses.whiterose.ac.uk/id/eprint/4427/1/PhD_Thesis_Corrected_FINAL_FINAL_3_9_13.pdf
VESTA-43k
https://www.osti.gov/etdeweb/servlets/purl/20902503
https://roma.sckcen.be/ws/portalfiles/portal/4558859/An_Optimum_Approach_to_Monte_Carlo_Burn_Up.pdf
https://rsicc.ornl.gov/codes/ccc/ccc7/ccc-769.html
https://www.tandfonline.com/doi/abs/10.13182/NSE07-A2695
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