Test results of in-sodium hydrogen meters by dynamic and static equilibrium methods; Studies of small leak sodium-water reactions (8)

not registered; not registered; not registered; not registered; Kanegae, Naomichi*; not registered

This report Summarizes the test results obtained from the in-sodium hydrogen meters in Small Sodlum-Water Reaction Test Facility (SWAT-2). The calibration tests and operating characteristics of the hydrogen meters, and the response characteristics of the meters to the water injections have been performed. Moreover, some parametric studies have been conducted for design considerations for the in-sodium hydrogen meters. Important findings from these experiments are ; (1)Accurate monitoring of hydrogen concentration in sodium can be done dy the dynamic and static equilibrium calibration methods. (2)Considerable pressure dependence of the hydrogen permeability through nickel membrane has been observed. (3)The drift of meter output has been observed of the Varian-type hydrogen meter after several water injection tests. (4)The comparison of the response characteristics of the Varian- and PNC-MAPI-type meters indicated that the response time was nearly the same but the Varian-type showed the better sensitivity. (5)In determining the hydrogen partial pressure in sodium by the static equilibrium method, outgassing from the vacuum system wall must be taken into account in the case of low pressure range while, in the high pressure range, the pumping effect of the ionization gauge filament must be considerered.