ONETRAN: a discrete ordinates finite element code for the solution of the one-dimensional multigroup transport equation

Comparison of Onetran Calculations with Cobalt-60 Dose Profile Data to Determine the Photon Spectrum

“…In the case of the Al/Au/Al combination, 3 Figure 2 are shown the dose profile curves for the 10 photon energies listed above, as calculated with ONETPAN, for the Au/Al configuration ( Figure 1, case a). In Figure 2a the photons are assumed incident on the gold side of the Au/Al interface, while in Figure 2b the photons are assumed incident on the aluminum side.…”

Nuclear Hardness Management.

“…While some systems programs have considerably improved their interactions with the nuclear effects technology community, making increased use of nuclear effects expertise to influence the designs of the system, their continues to be a dichotomy between the opinions and advice of nuclear effects experts and what is actually implemented in hardware, and in the extent of nuclear hardness validation test programs. There is even considerable disagreement V- 7 between the experts on the "how much hardening is enough." This disagreement is justification for programs doing less than some of the nuclear effects expert advise; if the experts can't agree amoung themselves, a program manager cannot be criticized for exercising his own best judgement on the extent to which he should devote the taxpayers' money to nuclear hardening and hardness validation tasks.…”

Reduction of photosynthetically active radiation under extreme stratospheric aerosol loads

“…The discrete-ordinates computer code ONETRAN (Hill, 1975) is applied for the numerical solution, which includes all orders of scattering and allows highly anisotropic phase functions to be considered. An S40 approximation was employed that resolves the angular distribution of the radiance with 40 discrete directions.…”