Special technique at KRB A:. Decontamination of stainless steel parts with phosphoric acid. Electropolishing. quick processing time reliability less secondary waste maximal recycling effect. Principle of electropolishing. +. 6000 A at low voltage. bath with phosphoric acid. -.
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stainless steel parts with
at low voltage
bath with phosphoric acid
- adding oxalic acid
- precipitate the dissolved iron as
- iron oxalate
- extracting the iron oxalate
- heating the iron oxalate
- transformation into iron oxid for final storage
Vessels of three Steam Generators
decontaminated from 20,000 Bq/cm²
to free release
producing only 1,5% radioactive waste