Particle 1 had a negative distance to a lattice boundary. d = -12.2584

User Support
1

Hello, I am trying to design a reactor with different types of fuel assembly. So, far I have designed 3 types of assembly and I assign separate universes for three types when creating cells for them. Now I am creating a lattice of 4 3 and I get an error of “Particle 1 had a negative distance to a lattice boundary. d = -12.2584” and such. I attach the geometry file in here with the material file also. Please, someone, help me here. Thanks.

geometry.xml (47.5 KB)

materials.xml (1.17 KB)

2

Hello, This is the IAEA 10MW Benchmark reactor assembly that I am trying to generate. Thanks.

3

Hello, I was able to solve the issue. My problem was I put the lattice pitch 0. Now, I have another problem, In my geometry file I have x y z axis boundary set to “reflective” which I can’t use now, I am changing to “vacuum” and it works. Is this the right way? also, The way I construct the fuel cells, Is this the right way to do this? Any help is much appreciated.