Determination of total cyanide in Hanford Site high-level wastes

Conference · Sun May 01 04:00:00 EDT 1994

OSTI ID:10163356

Winters, W I ^[1]; Pool, K H ^[2]

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1. Westinghouse Hanford Co., Richland, WA (United States)
2. Pacific Northwest Lab., Richland, WA (United States)

Nickel ferrocyanide compounds (Na{sub 2-x}Cs{sub x}NiFe (CN){sub 6}) were produced in a scavenging process to remove {sup 137}Cs from Hanford Site single-shell tank waste supernates. Methods for determining total cyanide in Hanford Site high-level wastes are needed for the evaluation of potential exothermic reactions between cyanide and oxidizers such as nitrate and for safe storage, processing, and management of the wastes in compliance with regulatory requirements. Hanford Site laboratory experience in determining cyanide in high-level wastes is summarized. Modifications were made to standard cyanide methods to permit improved handling of high-level waste samples and to eliminate interferences found in Hanford Site waste matrices. Interferences and associated procedure modifications caused by high nitrates/nitrite concentrations, insoluble nickel ferrocyanides, and organic complexants are described.

• Research Organization: Westinghouse Hanford Co., Richland, WA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-87RL10930
• OSTI ID: 10163356
• Report Number(s): WHC-SA--2433; CONF-940815--53; ON: DE94014636; BR: 35AF11201/35AF11202
• Country of Publication: United States
• Language: English

Related Subjects

052001
052002
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102
BENCH-SCALE EXPERIMENTS
CHEMICAL ANALYSIS
CHEMICAL AND SPECTRAL PROCEDURES
CYANIDES
DISTILLATION
FERROCYANIDES
HANFORD RESERVATION
HIGH-LEVEL RADIOACTIVE WASTES
RADIOACTIVE WASTE PROCESSING
TANKS
WASTE DISPOSAL AND STORAGE
WASTE PROCESSING