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DTRA’s advancements in nuclear and radiological detection
A new, more complex nuclear age has begun. Echoing the tensions of the Cold War amid rapidly evolving nuclear and radiological threats, preparedness in the modern age is a contest of scientific innovation. The Research and Development Directorate (RD) at the Defense Threat Reduction Agency (DTRA) is charged with winning this contest.
Anil Kumar, Jacques Ligou
Nuclear Science and Engineering | Volume 96 | Number 1 | May 1987 | Pages 1-7
Technical Paper | doi.org/10.13182/NSE87-A16358
Articles are hosted by Taylor and Francis Online.
The Boltynann-Fokker-Planck (BFP) equation has been applied to treat the photon transport in highly anisotropic scattering media. Some benchmark cases relating to haze and cloud media have been investigated. It is found that, in general, the number of Legendre moments required for the BFP equation is a factor of ∼5 lower compared to that for the standard (discrete ordinates Sn) approach for solving the Boltzmann equation for the comparable precision on the integral quantities like the albedo and transmission factor. But BFP is much more economical if one seeks precision on angular fluxes.
