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Neutron and Beta/Gamma Radiolysis of Supercritical Water

Neutron and Beta/Gamma Radiolysis of Supercritical Water. NERI Project 02-060 Argonne National Laboratory David Bartels Chuck Jonah University of Wisconsin Paul Wilson Mark Anderson Robert Agasie.

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Neutron and Beta/Gamma Radiolysis of Supercritical Water

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  1. Neutron and Beta/Gamma Radiolysis of Supercritical Water NERI Project 02-060 Argonne National Laboratory David Bartels Chuck Jonah University of Wisconsin Paul Wilson Mark Anderson Robert Agasie

  2. How much Oxygen and Hydrogen Peroxide is produced in the radiolysis of supercritical water at various temperatures and pressures??? Can radiolysis be suppressed by adding hydrogen?

  3. WaterProperties

  4. Microheterogeneity Tucker, S.C. and Maddox, M.W., J.Phys. Chem. B, 1998, 102, 2437.

  5. Electron Radiolysis

  6. Neutron Radiolysis O H recoil ion ca. 2 MeV n dense track p+ H fast ion H2O H2, O2, H2O2, HO2., OH, H, (e-)aq in reactor, use: H2 + OH H + H2O H + H2O2 H2O + OH H + O2 HO2. & etc.

  7. Reaction Set for Radiolysis of Water

  8. Apparatus for Supercritical Water Radiolysis Studies

  9. Optical Cell for Supercritical Water Radiolysis Sapphire windows 2 cm Spring washers Gold Gaskets Electron Beam Access

  10. Sample Kinetics Data --O2 Reaction with (e-)aq

  11. Hydrated Electron Reaction with Oxygen

  12. Density dependence of several reactions at 380C

  13. Ratio of H atoms to electrons formed in radiolysis

  14. Reaction of OH Radical with H2 Why should this “simple” reaction slow down at higher temperature?

  15. Data from NRU Reactor U-2 Loop experiment, showing slow decrease of hydrogen as it was titrated with a slow addition of oxygen, until the sudden onset of radiolysis indicated by the rapid appearance of oxygen (from Elliot et al. 1997). The slight mismatch in stoichiometry between the oxygen and hydrogen arises from instrument calibration errors, and/or loss of oxygen on pipework. The latter was frequently observed. The temperature at the reactor outlet was 307.5°C.

  16. University of WisconsinSupercritical Water Neutron Radiolysis Loop

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