Catalytic methods of deoxygenating water: Final report

Technical Report · Fri Apr 01 04:00:00 EST 1988

OSTI ID:5154931

Balakrishnan, P V; Chuang, K T; Fletcher, J W; Suppiah, S

As part of a programme on the optimization of pressurized water reactor (PWR) secondary side water treatment, methods of reducing the oxygen concentration from the feedwater without the use of toxic chemicals or chemicals that may produce undesirable by-products was sought for. Hydrogen was identified as such a chemical. Gamma radiation and catalysis were studied as means of promoting the reaction between oxygen and hydrogen, to form water with no byproducts. Two types of wet-proofed catalysts---the random bed and the ordered bed catalysts---were developed and tested under two modes of operation---liquid phase and gasliquid phase. Oxygen reduction down to concentrations of 1 ppB or less was achieved. Analytical models were developed for the processes from kinetic studies. Equations for use in designing deoxygenators for steam generator systems were derived. Computer simulations and experimental studies showed that gamma irradiation in the presence of hydrogen reduced oxygen to the low ppB levels at rates corresponding to G(/minus/O/sub 2/) values in the range 1.5 to 2 molecules100 eV gamma energy absorbed. The gamma source strength required for reducing oxygen concentrations to acceptable levels was estimated. The location of the deoxygenator in a steam generator system is discussed. 41 refs., 21 figs., 11 tabs.

• Research Organization: Atomic Energy of Canada Ltd., Chalk River, Ontario. Chalk River Nuclear Labs.
• OSTI ID: 5154931
• Report Number(s): EPRI-NP-5794; ON: TI88009304
• Country of Publication: United States
• Language: English

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