Heterogeneous Reactor

heterogeneous reactor

[‚hed·ə·rə′jē·nē·əs rē′ak·tər]
(nucleonics)
A nuclear reactor in which fissionable material and moderator are arranged in a regular pattern of discrete bodies with dimensions such that a nonhomogeneous medium is presented to neutrons.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Heterogeneous Reactor

 

a nuclear reactor that is constructed to isolate the fuel from the other elements and materials of the core.

The presence of heat-releasing elements, such as fuel assemblies and fuel channels, is an indication of the heterogeneous nature of a reactor. The heat-releasing elements can be of the most diverse shapes in construction (plates, for example, or rods of round, cruciform, or annular cross section), but in every case there is a sharp boundary in the heterogeneous reactor between the nuclear fuel, the moderator, and the coolant.

In practice, the vast majority of nuclear reactors of all possible types and purposes are heterogeneous. This broad distribution of heterogeneous reactors is due to their vastly greater constructional and technological advantages in comparison to homogeneous reactors.

IU. I. KORIAKIN

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Biblis is a 2D heterogeneous reactor composed of 8 materials.
Langenbuch is a 3D heterogeneous reactor composed of 4 materials.
The only notable omission from the book is a detailed discussion of industrial heterogeneous reactor scale-up, design, and operation issues.
Overview chapters that comment on the evolution of the technology from its origins are included on microreactor research and development at Louisiana Tech U.; silicon-based microreactors; chemical microprocess engineering; early-stage microchannel reactor development at Pacific Northwest National Laboratory; and parallel heterogeneous reactor systems for catalyst screening.
* heterogeneous reactors (fuel in their zone is placed discretely in the form of blocks (fuel assemblies streamlined by the coolant), between which there is a neutron moderator);
Solar photocatalysis has been implemented and evaluated in the pollutant treatment at pilot scale in heterogeneous reactors using Ti[O.sub.2]-P25, among which the following are highlighted: methylene blue [1], dichloroacetic acid, chlorinated compounds mixtures, phenol [2], 4-chlorophenol [3], dyes [4], pesticides and herbicides [5-9], and emerging contaminants [10].

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