Pressure balanced type membrane covered polarographic oxygen detectors for use in high temperature-high pressure water. II Effects of environmental factors on detector performance in water at 285.DEG.C.

DOI
  • NAKAYAMA Norio
    Energy Research Laboratory, Hitachi Ltd. Consulting Engineering Department, Hitachi Engineering Co.
  • UCHIDA Shunsuke
    Energy Research Laboratory, Hitachi Ltd.

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Other Title
  • Effects of Environmental Factors on Detector Performance in Water at 285°C

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Description

Performance tests of a pressure balanced type membrane covered polarographic oxygen detector were carried out in water at 285°C (BWR operating conditions) to determine the effects of environmental factors. Dependencies of detector current on pressure and sample water flow velocity were ascertained and response time of the detector was determined. Effects of H2 present in the water were also examined. The following conclusions were obtained: <BR>(1) The detector current increased in proportion to the 0.67th power of the flow velocity, but was independent of the pressure. <BR>(2) Response time was about 7 s. <BR>(3) Hydrogen caused a decrease in the current at cathode potentials more positive than -0.75 V against the Ag/AgCl electrode. However, at more negative potentials, the current was independent of H2 concentration and in proportion to O2 concentration. <BR>Oxygen concentrations in water containing H2 at 285°C could be determined by the detector under the measurement conditions of constant flow velocity and cathode potentials more negative than -0.75 V.

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Details 詳細情報について

  • CRID
    1390282679072640256
  • NII Article ID
    130000827696
  • DOI
    10.3327/jnst.21.476
  • COI
    1:CAS:528:DyaL2cXltVejurs%3D
  • ISSN
    18811248
    00223131
  • Text Lang
    en
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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