We tested using FNG shutdown dose rate benchmark straight out of SINBAD and got the following error

[py1sl]

No description provided.

[py1sl]

We tests FNG shutdown dose rate benchmark out of Sinbad, no modification by us beforehand and the following error was found:

mcnp2cad mcnp_n.inp -o fng.sat
Reading input file...
The MCNP title card is: doserate experiment
Done reading input.
World size: 161.115 (trs added 0.15)
Defining geometry...
ERROR: Intersection operation failed.
Empty volume created and will be deleted.
FAILED INTERSECTION CELL #229
terminate called after throwing an instance of 'std::runtime_error'
what(): Intersection failed
Aborted

[elliottbiondo]

This is due to the fact that cell 229 is null space -- it has zero volume. You can verify this by hand by working through the surface logic. Cell 241 is also null space. By simply commenting out cell 229 and 241, the correct CAD model is created.