New PDF release: Advances in Nuclear Science and Technology: v. 9

By Ernest J. Henley, Jeffery Lewins

ISBN-10: 0120293099

ISBN-13: 9780120293094

Advances in Nuclear technology and expertise, quantity nine offers details pertinent to the basic facets of nuclear technology and know-how. This publication discusses the secure and valuable improvement of land-based nuclear energy plants.

Organized into 5 chapters, this quantity starts off with an summary of the prospective outcomes of a large-scale liberate of radioactivity from a nuclear reactor within the occasion of a significant twist of fate. this article then discusses the extension of traditional perturbation suggestions to multidimensional structures and to high-order approximations of the Boltzmann equation. different chapters ponder information of chance therapy of the conventionally assumed loss-of-pressure coincidence to a latest gas-cooled reactor. This ebook discusses in addition info of reliability research of a customary electromechanical protecting approach. the ultimate bankruptcy offers with the pc functions and the necessity for standardization as either computing and nuclear strength shifted from examine and improvement to status.

This e-book is a beneficial source for reactor physicists, engineers, scientists, and learn employees.

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Example text

013 Ci sec/m3 was given in Beattie and Bryant (39) corresponding to an assumed ERL of 15 rads. 8 rads. This dose, like the thyroid dose, is less than the present ERL. 38 F. R. FARMER AND J. R. BEATTIE E. A Description of Radiation and Radiobiological Hazards from Ground Deposition 1. EXTERNAL RADIATION DOSE FROM RADIOACTIVE MATERIAL DEPOSITED ON THE GROUND The integrated dose of external gamma radiation from fission products deposited on the ground, which would be received over a period of time however short or long by persons if they remained in the area, must be a factor to be considered in deciding on emergency control measures after an accidental release.

D. Radioactive Material Washed Out of the Plume by Rain A fraction of the material in the plume may be washed out and fall upon the ground by the action of rain or snow falling through it. The fraction washed out in unit time is called the wash-out coefficient Λ. This, of course, is the same coefficient defined in Section ΙΙΙ,Ε in connection with containment sprays. The value of A appropriate in rain depends on the chemical reactivity or solubility of the fission product if it is gas or vapor, or upon the particle size if the material is particulate.

There are many excellent papers and books on the subject including a recent one entitled "Plume Rise" by Briggs (22). If plume rise caused by momentum and thermal buoyancy of large releases is neglected, the doses to persons within a few miles of the reactor may in some cases be seriously overestimated. A third mitigating effect of this kind, particularly apposite to very large releases, is plume rise caused by plume self-heating due to its own radioactivity. This phenomenon was first investigated theoretically by Gifford (23).

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Advances in Nuclear Science and Technology: v. 9 by Ernest J. Henley, Jeffery Lewins

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