- #1
Dedu
- 8
- 2
neutronics and burnup data
step duration time power keff flux ave. nu ave. q burnup source
(days) (days) (MW) (GWd/MTU) (nts/sec)
0 0.000E+00 0.000E+00 4.800E+02 1.06832 2.200E+15 2.933 209.103 0.000E+00 4.203E+19
1 5.000E+02 5.000E+02 4.800E+02 1.03163 2.328E+15 2.934 209.107 2.901E+01 4.204E+19
2 5.000E+02 1.000E+03 4.800E+02 0.99949 2.460E+15 2.935 209.109 5.803E+01 4.205E+19
3 5.000E+02 1.500E+03 4.800E+02 0.97140 2.604E+15 2.936 209.108 8.704E+01 4.207E+19
4 2.240E+02 1.724E+03 4.800E+02 0.95903 2.661E+15 2.937 209.108 1.000E+02 4.207E+19
After running the calculation associated with a burn card, MCNP shows this table in the output file. What is the meaning of the FLUX column (2.200E+15)? The manual says that it is an system averaged energy integrated flux, but I don't really get it nor can I link it to other values from this table or elsewhere.
As can be seen from the table, I have run the calculation with 4 time steps of 500, 500, 500, 224 days with constant power of 480 MW (pfrac = 1 for each time step) to get to a maximum burnup of 100 GWd/MTU. I know the relation between power, average ν, average Q and source. However, I cannot relate the flux to the other quantities.
Thank you
step duration time power keff flux ave. nu ave. q burnup source
(days) (days) (MW) (GWd/MTU) (nts/sec)
0 0.000E+00 0.000E+00 4.800E+02 1.06832 2.200E+15 2.933 209.103 0.000E+00 4.203E+19
1 5.000E+02 5.000E+02 4.800E+02 1.03163 2.328E+15 2.934 209.107 2.901E+01 4.204E+19
2 5.000E+02 1.000E+03 4.800E+02 0.99949 2.460E+15 2.935 209.109 5.803E+01 4.205E+19
3 5.000E+02 1.500E+03 4.800E+02 0.97140 2.604E+15 2.936 209.108 8.704E+01 4.207E+19
4 2.240E+02 1.724E+03 4.800E+02 0.95903 2.661E+15 2.937 209.108 1.000E+02 4.207E+19
After running the calculation associated with a burn card, MCNP shows this table in the output file. What is the meaning of the FLUX column (2.200E+15)? The manual says that it is an system averaged energy integrated flux, but I don't really get it nor can I link it to other values from this table or elsewhere.
As can be seen from the table, I have run the calculation with 4 time steps of 500, 500, 500, 224 days with constant power of 480 MW (pfrac = 1 for each time step) to get to a maximum burnup of 100 GWd/MTU. I know the relation between power, average ν, average Q and source. However, I cannot relate the flux to the other quantities.
Thank you