Abstract
It is very important to minimize the waste generation for decontamination of the reactor coolant system in a nuclear facility. As an alternative to commercial decontamination technologies, an inorganic acid chemical decontamination (SP-HyBRID) process can be effectively applied to the decontamination because it can significantly reduce the waste generation. In this study, the decontamination of a contaminated reactor coolant pump shaft from a nuclear facility was conducted using the SP-HyBRID process. First, equipment for a mock-up test of the decontamination was prepared. Detailed experimental conditions for the decontamination were determined through the mock-up test. Under the detailed conditions, the contaminated shaft was successfully decontaminated. The dose rate on the shaft surface was greatly reduced from 1400 to 0.9 μSv/h, and the decontamination factor showed a very high value (>1500).
Highlights
A corrosion oxide layer containing radioactive nuclides is deposited in the RCS in a nuclear facility operated at a high temperature and a high pressure [1,2,3,4]
Decontamination based on the acid permanganate Ultra-Violet light) process using an organic acid is widely used as a representative chemical decontamination process because it has a high decontamination factor (DF), and it has a problem that a considerable amount of radioactive ion exchange resin is generated as a secondary waste [9,10,11]
The pH of the process solution is an important indicator for the decontamination process [12,13,15]
Summary
A corrosion oxide layer containing radioactive nuclides is deposited in the RCS (reactor coolant system) in a nuclear facility operated at a high temperature and a high pressure [1,2,3,4]. Decontamination based on the acid permanganate Ultra-Violet light) process using an organic acid is widely used as a representative chemical decontamination process because it has a high decontamination factor (DF), and it has a problem that a considerable amount of radioactive ion exchange resin is generated as a secondary waste [9,10,11]. To resolve this problem, KAERI (Korea Atomic Energy Research Institute) has been developing the SP-HyBRID
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
