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Fission gas release in LWR fuel measured during nuclear operation

Conference ·
OSTI ID:5553784
; ;
A series of fuel behavior experiments are being conducted in the Heavy Boiling Water Reactor in Halden, Norway, to measure the release of Xe, Kr, and I fission products from typical light water reactor design fuel pellets. Helium gas is used to sweep the Xe and Kr fission gases out of two of the Instrumented Fuel Assembly 430 fuel rods and to a gamma spectrometer. The measurements of Xe and Kr are made during nuclear operation at steady state power, and for /sup 135/I following reactor scram. The first experiments were conducted at a burnup of 3000 MWd/t UO/sub 2/, at bulk average fuel temperatures of approx. 850 K and approx. 23 kW/m rod power. The measured release-to-birth ratios (R/B) of Xe and Kr are of the same magnitude as those observed in small UO/sub 2/ specimen experiments, when normalized to the estimated fuel surface-to-volume ratio. Preliminary analysis indicates that the release-to-birth ratios can be calculated, using diffusion coefficients determined from small specimen data, to within a factor of approx. 2 for the IFA-430 fuel. The release rate of /sup 135/I is shown to be approximately equal to that of /sup 135/Xe.
Research Organization:
Idaho National Engineering Lab., Idaho Falls (USA)
Sponsoring Organization:
USDOE
DOE Contract Number:
EY-76-C-07-1570
OSTI ID:
5553784
Report Number(s):
CONF-800403--32
Country of Publication:
United States
Language:
English

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Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210100* -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
210200 -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
ACTINIDE COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BURNUP
BWR TYPE REACTORS
CHALCOGENIDES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FISSION PRODUCT RELEASE
FUEL ELEMENTS
FUEL RODS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KRYPTON 85
KRYPTON 87
KRYPTON 88
KRYPTON 89
KRYPTON 90
KRYPTON ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEI
OPERATION
OXIDES
OXYGEN COMPOUNDS
PWR TYPE REACTORS
RADIOISOTOPES
REACTOR COMPONENTS
REACTOR OPERATION
REACTORS
SECONDS LIVING RADIOISOTOPES
URANIUM COMPOUNDS
URANIUM DIOXIDE
URANIUM OXIDES
WATER COOLED REACTORS
WATER MODERATED REACTORS
XENON 135
XENON 137
XENON 138
XENON 139
XENON ISOTOPES
YEARS LIVING RADIOISOTOPES