METHOD OF CHEMICAL DECONTAMINATION OF STAINLESS STEEL NUCLEAR FACILITIES

Patent · Tue Dec 19 00:00:00 EST 1961

OSTI ID:4832216

Pancer, G P; Zegger, J L

A chemical method is given for removing activated corrosion products on the primary system surfaces of a pressurized water reactor. The corrosion product deposits are composed chiefly of magnetite (Fe/sub 3/O/sub 4/) with small amounts of nickel and chromium oxides. The corroded surfaces are first flushed with a caustic permanganate primary solution consisting of sodium hydroxide and potassium permanganate followed by a secondary rinse solution of ammonium citrate and citric acid containing the complexing agent Versene in small amounts. Demineralized water is used to clean out the primary and secondary solutions and a 60-minute drying period precedes the rinse solution. (AEC)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-16-002957
• Assignee: U.S. Atomic Energy Commission
• Patent Number(s): US 3013909
• OSTI ID: 4832216
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-62
• Country of Publication: United States
• Language: English

Related Subjects

CHEMISTRY
AMMONIUM COMPOUNDS
CHEMICAL REACTIONS
CHROMIUM OXIDES
CITRIC ACID
CLEANING
COMPLEXES
CORROSION
DECONTAMINATION
EDTA
FISSION PRODUCTS
IRON OXIDES
MANGANESE OXIDES
NICKEL OXIDES
PERMANGANATES
PRESSURE VESSELS
RESIDUES
SODIUM HYDROXIDES
SURFACES
WATER