Interactions of hydrazine, ferrous sulfamate, sodium nitrite, and nitric acid in nuclear fuel processing solutions
Hydrazine and ferrous sulfamate are used as reductants in a variety of nuclear fuel processing solutions. An oxidant, normally sodium nitrite, must frequently be added to these nitric acid solutions before additional processing can proceed. The interactions of these four chemicals have been studied under a wide variety of conditions using a 2/sup P/ factorial experimental design. It was determined that the desired oxidations of Fe/sup 2 +/, NH/sub 2/NH/sup +//sub 3/, and NH/sub 2/SO/sub 3/H to Fe/sup 3 +/ and N/sub 2/ occur at ambient temperatures with nitric acid concentrations less than or equal to 3M without complicating side reactions. The rate of oxidation of Fe/sup 2 +/ by nitrous acid proceeds at about the same rate as the scavenging of nitrous acid by sulfamic acid. At nitric acid concentrations >3M and at elevated temperatures, hydrolysis of sulfamic acid to NH/sub 4/HSO/sub 4/ and decomposition of both hydrazine and nitrous acid become important side reactions.
- Research Organization:
- E.I. du Pont de Nemours and Co., Aiken, SC
- OSTI ID:
- 6567586
- Journal Information:
- Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 40:2; ISSN NUTYB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ALKALI METAL COMPOUNDS
CHEMICAL REACTIONS
DISPERSIONS
ENERGY SOURCES
FUELS
HYDRAZINE
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IRON COMPOUNDS
MIXTURES
NITRIC ACID
NITRITES
NITROGEN COMPOUNDS
NUCLEAR FUELS
OXIDATION
PROCESS SOLUTIONS
REACTOR MATERIALS
REPROCESSING
SEPARATION PROCESSES
SODIUM COMPOUNDS
SOLUTIONS
SPENT FUELS
SULFAMIC ACID
TRANSITION ELEMENT COMPOUNDS