Radiolytic reactions in the coolant of helium cooled reactors

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The success of helium cooled reactors is dependent upon the ability to prevent significant reaction between the coolant and the other components in the reactor primary circuit. Since the thermal reaction of graphite with oxidizing gases is rapid at temperatures of interest, the thermal reactions are limited primarily by the concentration of impurity gases in the helium coolant. On the other hand, the rates of radiolytic reactions in helium are shown to be independent of reactive gas concentration until that concentration reaches a very low level. Calculated steady-state concentrations of reactive species in the reactor coolant and core burnoff rates ... continued below

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12 p.

Creation Information

Tingey, G.L. & Morgan, W.C. January 1, 1975.

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  • Pacific Northwest Laboratory
    Publisher Info: Battelle Pacific Northwest Labs., Richland, Wash. (USA)
    Place of Publication: Richland, Washington

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Description

The success of helium cooled reactors is dependent upon the ability to prevent significant reaction between the coolant and the other components in the reactor primary circuit. Since the thermal reaction of graphite with oxidizing gases is rapid at temperatures of interest, the thermal reactions are limited primarily by the concentration of impurity gases in the helium coolant. On the other hand, the rates of radiolytic reactions in helium are shown to be independent of reactive gas concentration until that concentration reaches a very low level. Calculated steady-state concentrations of reactive species in the reactor coolant and core burnoff rates are presented for current U. S. designed, helium cooled reactors. Since precise base data are not currently available for radiolytic rates of some reactions and thermal reaction rate data are often variable, the accuracy of the predicted gas composition is being compared with the actual gas compositions measured during startup tests of the Fort Saint Vrain high temperature gas-cooled reactor. The current status of these confirmatory tests is discussed. 12 references. (auth)

Physical Description

12 p.

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Dep. NTIS

Source

  • IAEA international meeting on gas-cooled reactors, Julich, F.R. Germany, 13 Oct 1975

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  • Report No.: BNWL-SA--5345
  • Report No.: CONF-751007--6
  • Grant Number: E(45-1)-1830
  • Office of Scientific & Technical Information Report Number: 4100148
  • Archival Resource Key: ark:/67531/metadc869628

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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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  • January 1, 1975

Added to The UNT Digital Library

  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 11, 2017, 3:27 p.m.

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Tingey, G.L. & Morgan, W.C. Radiolytic reactions in the coolant of helium cooled reactors, article, January 1, 1975; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc869628/: accessed July 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.