Fission-product iodine in thoria/urania oxides (LWBR Development Program)

Technical Report · Thu Feb 01 04:00:00 EST 1979

OSTI ID:6167965

Clayton, J C

The ThO/sub 2/ fuel from an undefected irradiation test rod depleted to approx. 5 x 10/sup 20/ fissions/cm/sup 3/ was leached - first with methyl chloroform to extract any free fission iodine, followed by a second extraction with water to collect chemically-combined iodine ions. Equivalent amounts of /sup 129/I were found in each leaching solution. Combined and free iodine (/sup 131/I) were also measured in extractions from lightly irradiated ThO/sub 2/--UO/sub 2/ and UO/sub 2/ powders. The major portion of the identified combined /sup 131/I activity was in the form of iodide (/sup 131/I/sup -/), but both iodate (/sup 131/IO/sub 3//sup -/) and periodate (/sup 131/IO/sub 4//sup -/) were also detected. Most of the intentionally-introduced iodine was retained by unirradiated ThO/sub 2/ powders on vacuum annealing up to 700/sup 0/C and released at 1000/sup 0/C. The experimental results were correlated with available data on radioiodine release from irradiated ThO/sub 2/ and UO/sub 2/.

• Research Organization: Bettis Atomic Power Lab., West Mifflin, PA (USA)
• DOE Contract Number: EY-76-C-11-0014
• OSTI ID: 6167965
• Report Number(s): WAPD-TM-1148
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220300* -- Nuclear Reactor Technology-- Fuel Elements
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
ACTINIDE COMPOUNDS
CHALCOGENIDES
CHEMICAL ANALYSIS
ELEMENTS
EXTRACTION
FISSION PRODUCT RELEASE
FUEL ELEMENTS
FUELS
HALOGENS
IODINE
NONMETALS
OXIDES
OXYGEN COMPOUNDS
QUALITATIVE CHEMICAL ANALYSIS
REACTOR COMPONENTS
SEPARATION PROCESSES
SOLID FUELS
SOLVENT EXTRACTION
THORIUM COMPOUNDS
THORIUM OXIDES
URANIUM COMPOUNDS
URANIUM DIOXIDE
URANIUM OXIDES