[BUG] - TUD-FNG benchmark gives "bank is full" in output when run with ENDFB-VIII

[AlbertoBittes]

Describe the bug
TUD-FNG benchmark run with ENDFB-VIII library cannot complete

To Reproduce
Steps to reproduce the behavior:

1. set config file to run TUD-FNG
2. in main menu: exp -> assess -> 00c
3. See TUD-FNGo file

Expected behavior
Post-processing with this library will fail because of missing mctal file

Screenshots
49 -5.767E-01 -1.256E-03 -1.480E-01 1 0 -8.817E-01 -4.668E-01 -6.932E-02 1.368E+01 1.000E+00 0.000E+00
50 2.722E-01 -3.885E-04 -9.666E-02 1 0 7.840E-03 -9.766E-01 2.149E-01 1.329E+01 1.000E+00 0.000E+00
bank is full. bank backup file is being created. nps = 159
bank is full. bank backup file is being created. nps = 38
bank is full. bank backup file is being created. nps = 468
bank is full. bank backup file is being created. nps = 348
bank is full. bank backup file is being created. nps = 554
bank is full. bank backup file is being created. nps = 413
bank is full. bank backup file is being created. nps = 815
bank is full. bank backup file is being created. nps = 894
bank is full. bank backup file is being created. nps = 715
bank is full. bank backup file is being created. nps = 951
bank is full. bank backup file is being created. nps = 64
bank is full. bank backup file is being created. nps = 726
bank is full. bank backup file is being created. nps = 113
bank is full. bank backup file is being created. nps = 165

Desktop (please complete the following information):

• OS: Windows
• Version: 10

Configuration settings
Code: mcnp
Benchmark: TUD-FNG -> True

[alexvalentine94]

This is an MCNP specific error, not JADE. The particle bank refers to any secondary particles created in a neutron histories interactions that are stored in the bank and then followed when the active particle history dies. Surprising that you are seeing this for this problem, but you can try increasing particle bank size using the dbcn card (28th entry). It would be good to know what version of MCNP you are running as this may effect it.

[dodu94]

We had similar issues in the past when trying to run fissile isotopes in the sphere test, basically we were reaching criticality and the number of secondary neutrons was filling the bank. In those cases we had to reduce the density of the material in the end.

[AlbertoBittes]

This is an MCNP specific error, not JADE. The particle bank refers to any secondary particles created in a neutron histories interactions that are stored in the bank and then followed when the active particle history dies. Surprising that you are seeing this for this problem, but you can try increasing particle bank size using the dbcn card (28th entry). It would be good to know what version of MCNP you are running as this may effect it.

Yes, we faced the same issues with fissile/fissionable isotopes in the sphere. No clue of why this is showing up in a shielding benchmark, and only with ENDFB-VIII.

Running with mcnp6.2