Decay heat and decay rate of actinides in highly neutron-irradiated uranium initially of high /sup 235/U content
The contributions from actinides to the decay heat and the decay rate relative to those from fission products in highly irradiated /sup 235/U-enriched uranium has been assessed. This assessment, which is based on measured and associated calculated actinide concentrations in a sample of uranium in which the /sup 235/U had been burned to 17% of its original >97% content (i.e., to about 17% /sup 235/U), indicates that for most practical times (<10/sup 8/ s) after reactor shutdown, the actinide contribution to the decay heat and to the decay rate is a reasonably small fraction (<7%) of the total and comes mainly from /sup 237/U, /sup 238/Np, and /sup 238/Pu. These results differ from those for uranium only slightly enriched in /sup 235/U.
- Research Organization:
- Westinghouse Electric Corporation, Bettis Atomic Power Laboratory, Pennsylvania
- OSTI ID:
- 6703468
- Journal Information:
- Nucl. Sci. Eng.; (United States), Vol. 85:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACTINIDES
AFTER-HEAT
DECAY
ENRICHED URANIUM
FISSION PRODUCT RELEASE
FISSION PRODUCTS
NEPTUNIUM 238
PLUTONIUM 238
POWER REACTORS
URANIUM 237
BURNUP
EXPERIMENTAL DATA
IRRADIATION
ISOTOPE RATIO
REACTOR SHUTDOWN
TIME DEPENDENCE
URANIUM 235
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
DATA
DAYS LIVING RADIOISOTOPES
ELEMENTS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HEAVY NUCLEI
INFORMATION
ISOMERIC TRANSITION ISOTOPES
ISOTOPE ENRICHED MATERIALS
ISOTOPES
MATERIALS
METALS
MINUTES LIVING RADIOISOTOPES
NEPTUNIUM ISOTOPES
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
PLUTONIUM ISOTOPES
RADIOACTIVE MATERIALS
RADIOISOTOPES
REACTORS
SHUTDOWNS
URANIUM
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
220900* - Nuclear Reactor Technology- Reactor Safety
220100 - Nuclear Reactor Technology- Theory & Calculation