More on One-Speed Diffusion

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More on One-Speed Diffusion HW 20 Show that for a critical homogeneous reactor Infinite Bare Slab Reactor (one-speed diffusion) z  Vacuum beyond. Return current = 0. d = linear extrapolation distance = 0.71 tr (for plane surfaces) = 2.13 D. Reactor x a/2 a a0/2 d d Nuclear Reactor Theory, JU, Second Semester, 2008-2009 (Saed Dababneh).

More on One-Speed Diffusion HW 21 For the infinite slab . Show that the general solution with BC’s Flux is symmetric about the origin.  Nuclear Reactor Theory, JU, Second Semester, 2008-2009 (Saed Dababneh).

More on One-Speed Diffusion HW 21 (continued) Fundamental mode, the only mode significant in critical reactors. For a critical reactor, the geometrical buckling is equal to the material buckling. To achieve criticality Nuclear Reactor Theory, JU, Second Semester, 2008-2009 (Saed Dababneh).

More on One-Speed Diffusion To achieve criticality But criticality at what power level?? 0 can not be determined by the geometry alone. Do it. Nuclear Reactor Theory, JU, Second Semester, 2008-2009 (Saed Dababneh).

More on One-Speed Diffusion Spherical Bare Reactor (one-speed diffusion) Cube Sphere Minimum leakage  minimum fuel to achieve criticality.  HW 22 r  Reactor Continue! r0 Nuclear Reactor Theory, JU, Second Semester, 2008-2009 (Saed Dababneh).

More on One-Speed Diffusion HW 23 Infinite planer source in an infinite medium.   HW 24 ? Infinite planer source in a finite medium. x a/2 a a0/2 Source Nuclear Reactor Theory, JU, Second Semester, 2008-2009 (Saed Dababneh).

More on One-Speed Diffusion Infinite planer source in a multi-region medium. Infinite Finite Infinite  Project 2 Nuclear Reactor Theory, JU, Second Semester, 2008-2009 (Saed Dababneh).