Effects of a strong magnetic field on boiling of potassium

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One of the most promising ways to cool the lithium blanket of a full- scale iusion reactor is to employ a once-through potassium boiler in the blanket. A question has been raised as to whether this approach might have the disadvantage that magnetohydrodynamic effects might inhibit nucleate boiling. An analysis of the problem indicates that this is not the case, and an experr-ment has been run in which potassium has been boiled in magnetic fields ranging from 0 to 50,000 G. This work indicates that the presence of a strong magnetic field will have small effects on nucleate boiling of ... continued below

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Pages: 32

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Fraas, A. P.; Lloyd, D. B. & MacPherson, R. E. February 1, 1974.

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Description

One of the most promising ways to cool the lithium blanket of a full- scale iusion reactor is to employ a once-through potassium boiler in the blanket. A question has been raised as to whether this approach might have the disadvantage that magnetohydrodynamic effects might inhibit nucleate boiling. An analysis of the problem indicates that this is not the case, and an experr-ment has been run in which potassium has been boiled in magnetic fields ranging from 0 to 50,000 G. This work indicates that the presence of a strong magnetic field will have small effects on nucleate boiling of potassium, but there should be no serious effects so far as the operation of the boiler is concerned. The principal effects noted in the course of the experiment were some small changes in the boiling sounds and some small changes in the boiler-temperature distribution. The change in sound is believed to result from an inhibiting effect of magnetohydrodynamic forces on the rate of implosion of bubbles, and the change in temperature distribution is believed to have stemmed from small changes in the thermal-convection flow pattern in the boiler so that there was a small change in the distribution of energy input between nucleation sites in going from a zero magnetic field to a strong magnetic field. (auth)

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Pages: 32

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  • Other Information: Orig. Receipt Date: 30-JUN-74

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  • Report No.: ORNL-TM--4218
  • Grant Number: W-7405-ENG-26
  • DOI: 10.2172/4337374 | External Link
  • Office of Scientific & Technical Information Report Number: 4337374
  • Archival Resource Key: ark:/67531/metadc1020056

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • February 1, 1974

Added to The UNT Digital Library

  • Oct. 15, 2017, 10:09 p.m.

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  • Oct. 26, 2017, 2:02 p.m.

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Fraas, A. P.; Lloyd, D. B. & MacPherson, R. E. Effects of a strong magnetic field on boiling of potassium, report, February 1, 1974; Oak Ridge, Tennessee. (digital.library.unt.edu/ark:/67531/metadc1020056/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.