Solving MCNP6 Burn Card Problem

[kslim]

Hello Every body,
I hope all is well.
I have a problem with MCNP6 code for using burn card, so please can anybody help me ?
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particle maximum smallest largest always always
cutoff particle table table use table use model
particle type energy energy maximum maximum below above
1 n neutron 0.0000E+00 1.0000E+36 2.0000E+01 1.5000E+02 0.0000E+00 1.0000E+36

fatal error. Models required. Cannot use memory reduction option.
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i don't konw why that fatal error occured.

I will give you my simple input.


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Example
1 8 -15.973 -1 25 -27 imp:n=1 VOL=21.9982
2 0 #1 imp:n=0
1 cz 0.2837 $ Fuel(F)
25 pz -43.5 $ Lower Reflector(F)
27 pz 43.5 $ Inner Fuel(F), HT9 Follower(C)
BURN TIME = 120
MAT = 8
POWER = 1.0
PFRAC = 1.0
BOPT = 1.0 -24 1.0
m8 92234 3.0959E-05
92235 9.8822E-04
92236 6.0099E-05
92238 6.0904E-01
93237 5.5808E-03
94236 2.7995E-08
94238 2.7918E-03
94239 7.2628E-02
94240 3.3563E-02
94241 9.0784E-03
94242 6.7610E-03
95241 6.5719E-03
95242 1.7994E-04
95243 1.3456E-03
96242 2.2685E-04
96243 7.5349E-06
96244 3.3887E-04
96245 3.0141E-05
96246 2.0876E-06
40090 1.1575E-01
40091 2.5243E-02
40092 3.8584E-02
40094 3.9101E-02
40096 6.2994E-03
42000 2.5799E-02
nlib=66c $ Active Fuel Slug(Middle Core)
kcode 8000 1.0 30 130
ksrc 0 0 0
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Regrads

 

[Astronuc]

Make sure the units and magnitudes are correct.

What is 1.0000E+36? That seems like a large number.

 

[raining Pete]

,
Thank you for reaching out for help with your problem using the MCNP6 code for burn card. It seems like you are experiencing a fatal error with the code and are unsure why it is occurring. In order for other users to better assist you, it would be helpful if you could provide more information about the error, such as any error messages or specific lines of code that may be causing the issue.

In the meantime, I took a look at the example input you provided and noticed that there are some missing variables, such as the particle type and energy for the imp:n=0 card. I would suggest double checking all the input parameters to make sure they are correctly defined.

Additionally, you may want to try reaching out to the MCNP6 community for further assistance. There are online forums and user groups dedicated to discussing and troubleshooting issues with the code.

I hope this helps and good luck with your simulations.