USRBIN-Neutron Balance Density

Dear FLUKA experts,
      I have a problem about Neutron Balance Density in USRBIN detector. In the handbook of fluka, neutron balance density is an
"algebraic sum of outgoing neutrons minus incoming neutrons for all interactions". For a particular bin(such as x[x1,x2],y[y1,y2],
z[z1,z2] in a X-Y-Z coordinate system ) in a multiplying system which is in an unsteady state, sum of outgoing neutrons minus
incoming neutrons may be positive, is this sum the number of neutrons produced (such as produced by fission)in this bin ?
      Thanks in advance!
      Guojun Hu
Received on Sat Jul 21 2012 - 15:49:08 CEST