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US 10,762,997 B2Granted
Decontamination method reducing radioactive waste
AssigneeKorea Atomic Energy Research Institute
InventorsSang Yoon Park, Hui-Jun Won, Seonbyeong Kim, Wangkyu Choi, Mansoo Choi, Chong-Hun Jung, In-Ho Yoon, JeikWon Moon, Jun Young Jung, Jungsoon Park
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Abstract
A decontamination method that includes the steps of decontaminating an object containing radioactive contaminated metals or alloys with a chemical decontamination agent including sulfuric acid (H2SO4) and forming a Ba or Sr precipitate by adding a Ba or Sr cation and a hydroxylion or halogen anion salts to the decontamination waste water.
Claims9
A decontamination method comprising the following steps:
- decontaminating an object containing radioactive contaminated metals or alloys with a chemical decontamination agent comprising sulfuric acid (H2SO4) (step 1);
- forming a Ba or Sr precipitate by adding Ba or Sr cation and hydroxyl ion or halogen anion salts to a decontamination waste water generated in step 1 (step 2);
- and
- separating the precipitate and a supernatant after being treated with an ion exchange resin(step 3 ),
- wherein the Ba or Sr cations in step 2 form the precipitate with sulfuric acid ions (SO42−), and the precipitate is co-precipitated with radioactive materials and metal ions included in the decontamination waste water.
2 more elements
Dependencies are inferred from the claim text.