General quadratic surface for sphere not
recognized as identical to sphere surface.
| Anomaly: | The run dies with lost particles for
an input file with a gq and an identical defined surface.
For example, it does not recognized identical spherical surfaces
if one is defined using an "so" card and one is defined using a
"gq" card. |
| History: | Submitted by user. |
| Versions affected: | MCNP5, MCNPX, MCNP6 |
| Impact: | Run terminates with Lost Particles |
| Work Around: | Do not create duplicate surfaces with non-matching cards. |
Steps required to reproduce this anomaly:
Note: Run this example in the RSICC release of each of these codes.
About the Input file:
This input file contains two identical spherical surfaces with a radius of 50. One is defined with an "so" card and one is defined with a "gq" card.
Click here to download the input file, iddt5 (2 kb).
Run the input file in MCNP5 and/or MCNPX and/or MCNP6 verify the result.
Work around:
Do not create duplicate surfaces that are defined with non-matching card types.
Results obtained from our test:
MCNP6 fails. Run is terminated because 10 particles got lost.
