The KA facility in Rokkasho Reprocessing Plant started the active tests to solidify HAW into the glass in 2007 which was the examination of the final stage before the operation, but the active test had to be discontinued due to the trouble of glass melter operation with down of pouring by deposit of noble metals on the melter bottom. After the K-melter equipment and operating conditions were improved in response to the result of the mock-up tests, a series of active tests were restarted including pre-confirmation tests in May, 2012 by operating each one of two K-melters for the purpose of confirming the stable condition before having the pre-use inspection. One year later, these tests were finished with enough confirmation of stability in the state such as glass temperature and controlling the noble metals, and also confirmation of the processing capacity. This paper gives the successful situation in latest active tests of the KA facility by processing the actual waste including the implementation contents in the full scale mock-up tests using KMOC-melter that examined to identify the cause and measure for the troubles in K-melter operation.
