1. 1 Special technique at KRB A: Decontamination of stainless steel parts with phosphoric acid quick processing time reliability less secondary waste maximal recycling effect Electropolishing

2. 2 Principle of electropolishing Oxide skin Base material before after + - H 2 PO 4 6000 A at low voltage chemical or electrochemical bath with phosphoric acid

3. 3 Stainless Steel in Acid Bath

4. 4 Stainless Steel after Electropolishing

5. 5 Regeneration of Phosphoric Acid Recycling of Phosphoric acid by Reuse acid for decontamination Thermolysis of iron oxalat - adding oxalic acid - precipitate the dissolved iron as - iron oxalate - extracting the iron oxalate - vaporization - heating the iron oxalate - transformation into iron oxid for final storage

6. 6 Schematic principle of Regeneration

7. 7 Thermolysis plant for iron oxalate

8. 8 Technical Data of the thermolysis

9. 9 Example „Secondary Steam Generator“ Vessels of three Steam Generators decontaminated from 20,000 Bq/cm² to free release producing only 1,5% radioactive waste