Abstract
The K +( ø +) variational principle for neutron transport maintained by volume and surface sources is extended so that it is applicable to an albedo boundary condition. This condition arises from the use of a forward-backward-isotropic scattering kernel and the subsequent transformation of the transport equation to an equivalent isotropic form. Thus a finite element code for neutron transport which has been established for isotropic scattering can be used to provide solutions for the forward-backward-isotropic case of anisotropic scattering. In this way benchmarks can be found to check finite element codes written specifically for anisotropic scattering.
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