Process for the decontamination of steel surfaces and disposal of radioactive waste

Patent · Tue Apr 02 00:00:00 EST 1985

OSTI ID:5389546

Hanulik, J

A solution is provided for decontaminating steel surfaces, especially in nuclear reactor cooler circuits. The solution contains formic acid and/or acetic acid and at least one reducing 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.

• Assignee: Gesellschaft zur Forderung der industrieorientierten (Switzerland)
• Patent Number(s): US 4508641
• OSTI ID: 5389546
• Resource Relation: Patent Priority Date: Priority date 27 Aug 1982, Switzerland; Other Information: PAT-APPL-412375
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
COOLANT CLEANUP SYSTEMS
DECONTAMINATION
RADIOACTIVE WASTE DISPOSAL
SURFACE CLEANING
IRON OXIDES
DISSOLUTION
ABSORPTION
ACETIC ACID
CHEMICAL REACTIONS
FORMALDEHYDE
FORMIC ACID
PRECIPITATION
REDUCING AGENTS
STEELS
WORKING FLUIDS
ALDEHYDES
ALLOYS
CARBOXYLIC ACIDS
CHALCOGENIDES
CLEANING
COOLING SYSTEMS
ENERGY SYSTEMS
FLUIDS
IRON ALLOYS
IRON BASE ALLOYS
IRON COMPOUNDS
MANAGEMENT
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PRIMARY COOLANT CIRCUITS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
SEPARATION PROCESSES
SURFACE FINISHING
TRANSITION ELEMENT COMPOUNDS
WASTE DISPOSAL
WASTE MANAGEMENT
220200* - Nuclear Reactor Technology- Components & Accessories