I am testing out the multiphysics interface with on-the-fly S(a,b). The test problem is a simple U-235 sphere in a D2O water cube, with approximate densities.

I am getting the following error message:

Code: Select all

```
**** Fri May 13 14:14:46 2016:
- MPI task = 0
- OpenMP thread = 0
- RNG parent seed = 1463163234
- RNG history seed = 11534946651572738402
- RNG history idx = 9999
Fatal error in function OTFSabXS:
S(a,b) OTF nuclide not found for 1002.03s
Simulation aborted.
```

The problem does away when the maximum temperature in the multiphysics input is reduced to 649.999 K.

I suspect a minor numerical problem on temperature interval checks.

Problem data follows.

My material cards for the water are as follows

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```
%Heavy water reflector, 1 g/cc
mat water -1 moder lwtr1 1001 moder hwtr1 1002
1001.03c 8.6803E-04
1002.03c 4.7715E-02
8016.03c 2.4292E-02
therm lwtr1 0 lwe7.00t lwe7.02t lwe7.04t lwe7.06t lwe7.08t lwe7.10t lwe7.12t lwe7.14t
therm hwtr1 0 hwe7.00t hwe7.02t hwe7.04t hwe7.06t hwe7.08t hwe7.10t hwe7.12t hwe7.14t
```

Code: Select all

```
1 water 0
1 0.25 1
11
-2.5 -0.4 650.0
-2.0 -0.5 550.0
-1.5 -0.6 500.0
-1.0 -0.7 450.0
-0.5 -0.8 400.0
0 -1.0 300.0
0.5 -0.8 400.0
1.0 -0.7 450.0
1.5 -0.6 500.0
2.0 -0.5 550.0
2.5 -0.4 650.0
```