Read e-book online Computational Methods in Reactor Shielding PDF

By James Wood (Auth.)

ISBN-10: 0080286852

ISBN-13: 9780080286853

ISBN-10: 0080286860

ISBN-13: 9780080286860

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Z. Morgan (Eds)(1976). Power Plants. Pergamon Press, New York. 9. Klement, A. W. and others (1972). Estimates of Ionizing Radiation Doses in the United States 1960-2000. S. Environmental Protection Agency Report 0RP/CSD 72-1. Environmental Impact of Nuclear 10. Morgan, K. Z. E. Turner (Eds)(1967). Principles of Radiation Protection. Revised edition published by R. Krieger, Huntington, New York (1973). 11. 43 (1975). Review of the Current State of Radiation Protection Philosophy. National Council on Radiation Protection and Measurements, USA.

14) which emits monoenergetic particles of the same kind with the same energy but in the opposite direction to that of Si, and at a rate of 6 x 10 9 particle cm - 2 s" 1 . What now are the current and flux densities at the points referred to in a) and b) above ? (i) (a) The flow of particles per unit area per unit time through plane A in the positive direction is 1 0 1 0 particle cm - 2 s" 1 ; the flow rate in the opposite direction 50 Computational Methods in Reactor Shielding 10,0cm-2s-' Fig.

39a), the flux density is given by n A . J(0o) cos Qo 10,10 particle cm l s i. (b) The current density is the net flow rate through unit area of plane B and is given by np . 0 cos 6 particle cm""2 s _ 1 , and is in the direction of njg. The flux density, *B ' ^ 1010 particle cm - 2 s" 1 . cos e (ii) (a) The net current density is now given by 1 0 1 0 - 6 x 10 9 = 4 x 10 9 particle cm - 2 s" 1 , and is in the direction of _n^. 6 x 10 10 particle cm - 2 s" 1 . (b) The net current density = 1 0 1 0 cos 6 - 6 x 10 9 cos 9 = k x 10 9 cos 9 particle cm - 2 s" 1 , and is in the direction of njg.

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Computational Methods in Reactor Shielding by James Wood (Auth.)


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