Process for the decontamination of steel surfaces and...

Details Process for the decontamination of steel surfaces and... Process for the decontamination of steel surfaces and...

G - Physics

21

F

149/15

G21F 9/28 (2006.01) G21F 9/00 (2006.01)

Patent

CA 1197445

- 1 - ABSTRACT OF THE DISCLOSURE A solution is provided for decontcaminating steel surfaces, especially in nuclear reactor cooler circuits. The solution contains formic acid and/or acetic acid and at least one reduce agent such as formaldehyde and/or acetaldehyde. The solution is effective to dissolve the iron oxide from the contaminated steel surface directly and/or reductively and to convert it to Fe-(II)-formate or acetate which are stabilized by the reducing conditions in the solution. For waste disposal the dissolved iron is precipitated from the used decontaminating solution, wherein the iron compounds that have been formed are the sole adsorbents for the radioactive materials contained in the decontaminating solution.

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