Moderator

A substance such as hydrogen, deuterium, oxygen or paraffin capable of slowing fast nuetrons upon collision.
Found on http://home.nas.net/~dbc/cic_hamilton/dictionary/a.html

Moderator

General term for materials used in nuclear reactors to reduce the energy (speed) of Fast Neutrons to that of Thermal (slow) Neutrons . The thermal neutrons are then able to interact and Fission with U-235.
Found on http://www.ionactive.co.uk/glossary.html

moderator

[n] - any substance used to slow down neutrons in nuclear reactors 2. [n] - someone who presides over a forum or debate 3. [n] - someone who mediates disputes and attempts to avoid violence
Found on http://www.webdictionary.co.uk/definition.php?query=moderator

Moderator

In a nuclear fission reactor, the moderator slows fast neutrons down. Slower moving neutrons are more effective at keeping the chain reaction going by causing more uranium nuclei to break apart. Each fission event releases fast neutrons - the moderator is therefore required to slow them down
Found on http://www.users.zetnet.co.uk/computing/MainPage/SecDepts/Physics/Resources

Moderator

the person who runs a conference or newsgroup - they have the responsibility of selecting which postings are used and which not
Found on http://www.archivemag.co.uk/

Moderator

A material used to slow down the neutrons in a nuclear reactor, thus increasing their chances of being obsorbed by a fissile material.Some of the materials used as moderators are:graphiteheavy waterwater
Found on http://www.diracdelta.co.uk/science/source/m/o/moderator/source.html

Moderator

In the Church of Scotland, the minister chosen to act as president of the annual General Assembly. ...
Found on http://www.encyclo.co.uk/local/20688

Moderator

A material such as light or heavy water or graphite used in a reactor to slow down fast neutrons by collision with lighter nuclei so as to expedite further fission
Found on http://www.encyclo.co.uk/local/20725

Moderator

A material such as light or heavy water or graphite used in a reactor to slow down fast neutrons by collision with lighter nuclei so as to expedite further fission.
Found on http://www.encyclo.co.uk/visitor-contributions.php

Moderator

A material such as light or heavy water or graphite used in a reactor to slow down fast neutrons so as to expedite further fission.
Found on http://www.theiet.org/factfiles/energy/nuclear-terms.cfm?type=pdf

Moderator

Mod'er·a`tor noun [ Latin : confer French modérateur .] 1. One who, or that which, moderates, restrains, or pacifies. Sir W. Raleigh. « Angling was . . . a moderator of passions.» Walton. 2. The officer who presides over an assembly to prese
Found on http://www.encyclo.co.uk/webster/M/86

moderator

noun someone who mediates disputes and attempts to avoid violence
Found on http://wordnetweb.princeton.edu/perl/webwn?s=moderator

moderator

noun any substance used to slow down neutrons in nuclear reactors
Found on http://wordnetweb.princeton.edu/perl/webwn?s=moderator

Moderator

• (n.) In the University of Oxford, an examiner for moderations; at Cambridge, the superintendant of examinations for degrees; at Dublin, either the first (senior) or second (junior) in rank in an examination for the degree of Bachelor of Arts. • (n.) A mechamical arrangement for regulating motion in a machine, or producing equality of ef
Found on http://thinkexist.com/dictionary/meaning/moderator/

moderator

(from the article `nuclear reactor`) ...12). Materials that contain atoms of this kind—water, heavy water, beryllium metal and oxide, and graphite—are deliberately incorporated into the ... Yttrium dihydride is used as a moderator in reactors to slow down neutrons. Certain rare earths are also used in shielding materials becau...
Found on http://www.britannica.com/eb/a-z/m/106

Moderator

[town official] A moderator is an official of an incorporated town who presides over the town meeting, and in some cases, other municipal meetings. In the United States, the area of the country best known for the town meeting form of government is New England. The office of moderator exists in at least Connecticut (Mandell c. 2007), Maine,
Found on http://en.wikipedia.org/wiki/Moderator_(town_official)

Moderator

A material such as light or heavy water or graphite used in a reactor to slow down fast neutrons so as to expedite further fission.
Found on http://www.encyclo.co.uk/local/21076

moderator

The leader and main person responsible for an inspection or other review process....
Found on http://www.imbus.de/glossar/

moderator

material used to reduce, by scattering collisions and without appreciable capture, the kinetic energy of neutrons
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=393-17-20

moderator

in a computer conference, a person who receives the proposed articles and may accept, modify, or reject them
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=732-03-13

moderator

Principle of a moderator Credit: European Nuclear Society A substance used in nuclear reactors to reduce the speed of fast neutrons produced by nuclear fission. These substances consist of atoms of light elements, such as deuterium in heavy water, graphite, and beryllium, to which neutrons are...
Found on http://www.daviddarling.info/encyclopedia/M/moderator.html

Moderator

In the Church of Scotland, the minister chosen to act as president of the annual General Assembly
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0004871.html

moderator

In a nuclear reactor, a material such as graphite or heavy water used to reduce the speed of high-energy neutrons. Neutrons produced by nuclear fission are fast-moving and must be slowed to initiate further fission so that nuclear energy continues to be released at a controlled rate. Slow neutrons are much more likely to cause fission in a ...
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0016165.html

Moderator

A substance such as hydrogen, deuterium, oxygen or paraffin capable of slowing fast nuetrons upon collision.
Found on http://www.chemistry-dictionary.com/definition/moderator.php

Moderator

General term for materials used in nuclear reactors to reduce the energy (speed) of Fast Neutrons to that of Thermal (slow) Neutrons . The thermal neutrons are then able to interact and Fission with U-235.
Found on http://www.ionactive.co.uk/glossary_atoz.html?s=az&t=m
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