Could not find nuclide U-235.70c in cross_sections.xml file!

User Support
1

hi,
i have this error
Reading settings XML file…
Reading cross sections XML file…
Reading geometry XML file…
Reading materials XML file…
ERROR: Could not find nuclide U-235.70c in cross_sections.xml file!
ERROR STOP
regards

2

Hi,

If you used the NNDC cross section python script, try replacing the 70c with 71c.

Best,
Derek

3

Hi Otman,

Is this a test or example you are running or is it your own file? Also, I’ve readded the google group as this is not my area of expertise. Hopefully someone who deals with cross sections can weigh in on this.

Best,
Derek

materials.xml (378 Bytes)

4

The NNDC data has a different labeling scheme than that of the data shipped with MCNP. It looks like you’ll want to use “HH2O” and “71t” in place of “lwtr” and “10t,” respectively.

That is, in the case of the pin cell example problem, try instead of .

Jon

5

To those in charge of maintaining the test directory,

If this is from the test_basic, is there a reason that this test doesn’t work out of the box?

Derek

6

Hi,
thank you for your help. now the tests are working.
regards