Studies of dissolved oxygen's track and hydrazine deoxygentation in in-pile fuel elements test loop

In chemical deoxygenation, the hydrazine serves as deoxygenation agent which has advantages, not only good results for removing oxygen can be obtained, but also it serves to passivate the piping and to reduce corrosion. In high temperature and pressure test loop, effects of temperature and hydrazine concentration on the deoxygenation are studied. Test shows that at temperature of 90 deg C and hydrazine be added 1.5-3 times in excess of oxygen present in the system after deaeration, the oxygen contents of 96-99% can be removed. At the initial start stage, oxygen contents of loop water is lower, safe operation can be supported. Track test of dissolved oxygen affords useful information for study of corrosion of reactor material