Interim report III, production test IP-560-A: Half-plant low dichromate, low pH water treatment at C Reactor

摘要

A half-plant low dichromate-low pH test was started at C Reactor on March 1, 1963. The test will demonstrate whether l.0 ppm sodium dichromate provides adequate corrosion inhibition when,the reactor coolant pH is 6.6. The test monitoring will consist of ex-reactor tube examinations, in-reactor.wall thickness measurements, coupons, visual examination of fuel elements and fuel element weight loss measurements. Previous interim reports have discussed the results obtained from the visual examination of two twenty column discharges obtained as follows: one discharge prior to the start of the test; one discharge such that the fuel was exposed to-coolant treated at both 7.0 and 6.6 pH. This report discusses the-results from.the visual examination and-weight loss measurements on fuel irradiated under test conditions, the results-from coupons-exposed in the downstream spacer pattern, and the ex-reactor examination,of two process tubes.