The Role of cavitation on Initiating Mercury-Steel Wetting

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In accelerator-driven neutron sources such as the Spallation Neutron Source (SNS) with powers in the 2 MW range (time-averaged), the interaction of the energetic proton beam with the mercury target can lead to very high heating rates in the target. Although the resulting temperature rise is relatively small (a few degrees C), the rate of temperature rise is enormous (-10{sup 7} C/s) during the very brief beam pulse (-0.58 {micro}s). The resulting thermal-shock induced compression of the mercury leads to the production of large amplitude pressure waves in the mercury that interact with the walls of the mercury target and ... continued below

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5 pages

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Taleyarkhan, R.P. November 14, 2001.

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Description

In accelerator-driven neutron sources such as the Spallation Neutron Source (SNS) with powers in the 2 MW range (time-averaged), the interaction of the energetic proton beam with the mercury target can lead to very high heating rates in the target. Although the resulting temperature rise is relatively small (a few degrees C), the rate of temperature rise is enormous (-10{sup 7} C/s) during the very brief beam pulse (-0.58 {micro}s). The resulting thermal-shock induced compression of the mercury leads to the production of large amplitude pressure waves in the mercury that interact with the walls of the mercury target and the bulk flow field. Understanding and predicting propagation of pressure pulses in the target are considered critical for establishing the feasibility of constructing and safely operating such devices. Safety-related operational concerns exist in two main areas, viz., (1) possible target enclosure failure from impact of thermal shocks on the wall due to its direct heating from the proton beam and the loads transferred from the mercury compression waves, and (2) impact of the compression-cum-rarefaction wave-induced effects such as cavitation bubble emanation and their impact on mercury-steel interfacial phenomena (such as wetting, mass transfer and erosion).

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5 pages

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  • Annual American Nuclear Society Conference, Milwaukee, WI (US), 06/17/2001--06/21/2001

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  • Report No.: P01-112495
  • Grant Number: AC05-00OR22725
  • Office of Scientific & Technical Information Report Number: 788903
  • Archival Resource Key: ark:/67531/metadc721880

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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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  • November 14, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • March 28, 2016, 8:58 p.m.

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Taleyarkhan, R.P. The Role of cavitation on Initiating Mercury-Steel Wetting, article, November 14, 2001; Tennessee. (digital.library.unt.edu/ark:/67531/metadc721880/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.