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Download Two Phase Closed Thermosyphon Cooling System: Cooling the Moderator of Cold Neutron Source (CNS) for Research Nuclear Reactor eBook

by Melaku Habte

Download Two Phase Closed Thermosyphon Cooling System: Cooling the Moderator of Cold Neutron Source (CNS) for Research Nuclear Reactor eBook
ISBN:
3639122771
Author:
Melaku Habte
Category:
Engineering
Language:
English
Publisher:
VDM Verlag Dr. Müller (February 1, 2009)
Pages:
196 pages
EPUB book:
1526 kb
FB2 book:
1816 kb
DJVU:
1358 kb
Other formats
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Rating:
4.1
Votes:
980


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Items related to Two Phase Closed Thermosyphon Cooling System: Cooling. ISBN 13: 9783639122770. However, the operational limit of the closed two phase thermosyphons has been the focus of very few studies.

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The unique pelletized cold neutron moderator CM-202 at the IBR-2 reactor was put into test operation and have already worked more than 2000 hours. Normal, fast and trouble-free operation of the cryogenic moderator requires strict adherence to technological conditions (fast charging and discharging of moderator chamber, maintenance of required temperature and pressure at different parts of cryogenic system).

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The cold neutron source (CNS) system of the Open Pool Australian Light-Water (OPAL) reactor is a 20.

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The use of two phase closed thermosyphons has been on the rise in recent years. This is due to the fact that thermosyphons offer very low thermal resistance, are highly efficient and very easy to manufacture. Thermosyphons are especially suitable for applications where there is considerable distance between heat source and heat sink.

Neutron Moderators in Nuclear Reactors. The moderator, which is of importance in thermal reactors, is used to moderate, that is, to slow down, neutrons from fission to thermal energies. The probability that fission will occur depends on incident neutron energy. Physicists calculate with fission cross-section, which determines this probability. Nuclei with low mass numbers are most effective for this purpose, so the moderator is always a low-mass-number material. In a fast reactor there is no moderator, only fuel and coolant. The moderation of neutrons is undesirable in fast reactors.

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The use of two phase closed thermosyphons has been on the rise in recent years. This is due to the fact that thermosyphons offer very low thermal resistance, are highly efficient and very easy to manufacture. Thermosyphons are especially suitable for applications where there is considerable distance between heat source and heat sink. One such application is in cooling the moderator of cold neutron source (CNS) of research nuclear reactors. However, the operational limit of the closed two phase thermosyphons has been the focus of very few studies. Most of these studies considered only the thermosyphon, but have not included the vapor reservoir. In this book, the fundamental working principles of Two-Phase Closed Thermosyphon with Reservoir (TPCTR) is reviewed. The various operational limits and the effects of the size of the vapor reservoir on the heat transport capacity are analyzed. An analytical model is developed and CFD analysis is carried out to study the nucleate boiling inside the thermosyphon.