Design and Construction of the NSTX Bakeout, Cooling and Vacuum Systems

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Description

This paper will describe the design, construction and initial operation of the NSTX bakeout, water cooling and vacuum systems. The bakeout system is designed for two modes of operation. The first mode allows heating of the first wall components to 350 degrees C while the external vessel is cooled to 150 degrees C. The second mode cools the first wall to 150 degrees C and the external vessel to 50 degrees C. The system uses a low viscosity heat transfer oil which is capable of high temperature low pressure operation. The NSTX Torus Vacuum Pumping System (TVPS) is designed to ... continued below

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132 Kilobytes pages

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Dudek, L.E.; Kalish, M.; Gernhardt, R.; Parsells, R.F. & Blanchard, W. November 1, 1999.

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Description

This paper will describe the design, construction and initial operation of the NSTX bakeout, water cooling and vacuum systems. The bakeout system is designed for two modes of operation. The first mode allows heating of the first wall components to 350 degrees C while the external vessel is cooled to 150 degrees C. The second mode cools the first wall to 150 degrees C and the external vessel to 50 degrees C. The system uses a low viscosity heat transfer oil which is capable of high temperature low pressure operation. The NSTX Torus Vacuum Pumping System (TVPS) is designed to achieve a base pressure of approximately 1x10 (superscript -8) Torr and to evacuate the plasma fuel gas loads in less than 5 minutes between discharges. The vacuum pumping system is capable of a pumping speed of approximately 3400 l/s for deuterium. The hardware consists of two turbo molecular pumps (TMPs) and a mechanical pump set consisting of a mechanical and a Roots blower pump. A PLC is used as the control system to provide remote monitoring, control and software interlock capability. The NSTX cooling water provides chilled, de ionized water for heat removal in the TF, OH and PF, power supplies, bus bar systems, and various diagnostics. The system provides flow monitoring via a PLC to prevent damage due to loss of flow.

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132 Kilobytes pages

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INIS; OSTI as DE00014669

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  • Other Information: PBD: 1 Nov 1999

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  • Report No.: PPPL-3386
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/14669 | External Link
  • Office of Scientific & Technical Information Report Number: 14669
  • Archival Resource Key: ark:/67531/metadc621954

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  • November 1, 1999

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 15, 2016, 8:36 p.m.

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Dudek, L.E.; Kalish, M.; Gernhardt, R.; Parsells, R.F. & Blanchard, W. Design and Construction of the NSTX Bakeout, Cooling and Vacuum Systems, report, November 1, 1999; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc621954/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.