Study on the Decontamination Methodology for the Refurbishment of Spent Fuel Dry Processing Facility

As the increase of the operation age of the domestic high radiation facilities such as IMEF, PIEF and DFDF, the necessity of decontamination and refurbishment of hot cells in these facilities is also increased. In the near future, the possibilities of refurbishment of hot cells in compliance with the new regulations, the reuse of hot cells for the other purposes and the decommissioning of the facilities also exist. The following contents were studied. 1) State of the art on the decontamination technologies on the spent fuel dry processing facility - Case study on the decontamination and refurbishment of hot cells in the foreign countries. - Understanding of radioactive contamination characteristics of spent fuel powder treatment equipment operated under the high radiation field of the spent fuel dry processing facility. - Evaluation of applicable decontamination technologies 2) Comparative tests of the candidate decontamination technology - Preparation of the surrogate test specimens and derivation of gel decontamination condition - Decontamination tests and comparison with light ablation method 3) Establishment of decontamination methodology for the refurbishment of hot cells of the spent fuel dry processing facility - Derivation of required equipment for the hot cell decontamination - Establishment of decontamination methodologies on the contaminated equipment