- #1
Mahboubeh
- 1
- 0
Hi, I have a sphere that it contains many sub-spheres. I want to define these small spheres as volumetric source. But when I run MCNP, it doesn't work. MCNP error: the sampeling effeiciency is too low
Maybe someone can help me.
100 0 10
200 1 -1 -10 fill=2
300 1 -1 -2 3 -4 5 -6 7 u=2 lat=1
fill=-8:8 -8:8 -8:8 3 4912r
400 1 -1 30 u=3
500 1 -1 -30 40 u=3
600 1 -1 -40 50 u=3
700 1 -1 -50 u=3
c *************** Surfaces**********************
10 so 5
2 px 0.31
3 px -0.31
4 py 0.31
5 py -0.31
6 pz 0.31
7 pz -0.31
30 so 0.3
40 so 0.29
50 so 0.2
c Water (rho=1)
M1 1001 0.333
8016 0.667
imp:e 0 1 1 1 1 1 1
mode e
sdef pos=0 0 0 rad=d1 cell=d2
si1 0 0.3
sp1 -21 2
si2 L (700<300<200)
sp2 1
nps 1000
Thank you
with best regards
Maybe someone can help me.
100 0 10
200 1 -1 -10 fill=2
300 1 -1 -2 3 -4 5 -6 7 u=2 lat=1
fill=-8:8 -8:8 -8:8 3 4912r
400 1 -1 30 u=3
500 1 -1 -30 40 u=3
600 1 -1 -40 50 u=3
700 1 -1 -50 u=3
c *************** Surfaces**********************
10 so 5
2 px 0.31
3 px -0.31
4 py 0.31
5 py -0.31
6 pz 0.31
7 pz -0.31
30 so 0.3
40 so 0.29
50 so 0.2
c Water (rho=1)
M1 1001 0.333
8016 0.667
imp:e 0 1 1 1 1 1 1
mode e
sdef pos=0 0 0 rad=d1 cell=d2
si1 0 0.3
sp1 -21 2
si2 L (700<300<200)
sp2 1
nps 1000
Thank you
with best regards