title: Improvement of nuclide leaching resistance of paraffin waste form with low density polyethylene.
abstract: Low-level liquid borate wastes have been immobilized with paraffin wax using a concentrate waste drying system (CWDS) in Korean nuclear power plants. The possibility for improving chemical durability of paraffin waste form was suggested in this study. A small amount of low density polyethylene (LDPE) was added to increase the leaching resistance of the existing paraffin waste form. The influence of LDPE on the leaching behavior of waste form was investigated by performing leaching test according to ANSI/ANS-16.1 procedure during 325 days. It was observed that the leaching of nuclides immobilized within paraffin waste form made a marked reduction although little content of LDPE was added to waste form. The acceptance criteria of paraffin waste form associated with leachability index (LI) and compressive strength after the leaching test were fully satisfied with the help of LDPE.
authors.affiliation: Nuclear Environment Technology Institute, Korea Hydro and Nuclear Power Co., Ltd., Yusung-gu, Taejon. clkim@khnp.co.kr
authors.forename: Chang Lak
authors.initials: CL
authors.lastname: Kim
authors.forename: Joo Wan
authors.initials: JW
authors.lastname: Park
authors.forename: Ju Youl
authors.initials: JY
authors.lastname: Kim
authors.forename: Chang Hyun
authors.initials: CH
authors.lastname: Chung
mesh_terms: D002588:Cesium Radioisotopes; D003037:Cobalt Radioisotopes; D006801:Humans; D007723:Korea; D009688:Nuclear Reactors; D010232:Paraffin / Q000737:chemistry*; D020959:Polyethylene / Q000737:chemistry; D011850:Radioactive Waste; D011868:Radioisotopes / Q000737:chemistry*; D013326:Strontium Radioisotopes; D018505:Waste Management / Q000379:methods
chemical_list: D002588:Cesium Radioisotopes; D003037:Cobalt Radioisotopes; D011850:Radioactive Waste; D011868:Radioisotopes; D013326:Strontium Radioisotopes; D010232:Paraffin; D020959:Polyethylene