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Calculation of xenon in a Hanford pile

Technical Report ·
OSTI ID:6774919
The possible presence in a thermal reactor of fission products of large nuclear cross-section was anticipated before the Hanford Piles were built. Excess reactivity was provided for this eventuality even though the identity and characteristics of the offending isotopes were not known. It was discovered after initial operation that one isotope was formed, Xe{sup 135}, that overshadowed all others in reactivity effect. This isotope was found to have a cross-section of {approximately}3.5 {times} 10{degree} barns. Its growth, decay burnout characteristics have been studied so that they can be predicted with some precision. Since the reactivity transients introduced by the growth, decay, and burnout of xenon are of larger magnitude than transients from any other source, foreknowledge of their extent and direction is mandatory for efficient pile operation. This paper was written August 11, 1952. 4 figs., 4 tabs.
Research Organization:
Hanford Works, Richland, WA (USA)
Sponsoring Organization:
DOE/NE
DOE Contract Number:
AC06-87RL10930
OSTI ID:
6774919
Report Number(s):
HW-25076; ON: DE90012853
Country of Publication:
United States
Language:
English

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BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALIBRATION
CHEMICAL ANALYSIS
CONCENTRATION RATIO
ENVIRONMENTAL TRANSPORT
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EVEN-ODD NUCLEI
FORECASTING
FUEL ELEMENTS
HANFORD PRODUCTION REACTORS
HAPO
HISTORICAL ASPECTS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MASS TRANSFER
MATERIALS
MINUTES LIVING RADIOISOTOPES
NATIONAL ORGANIZATIONS
NUCLEI
OPERATION
PLUTONIUM PRODUCTION REACTORS
POWER DENSITY
PRODUCTION REACTORS
RADIOACTIVE EFFLUENTS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
RADIOISOTOPES
RADIONUCLIDE MIGRATION
REACTIVITY
REACTOR COMPONENTS
REACTOR OPERATION
REACTOR SHUTDOWN
REACTOR START-UP
REACTORS
SHUTDOWNS
START-UP
US AEC
US DOE
US ERDA
US ORGANIZATIONS
VARIATIONS
WASTES
XENON 135
XENON ISOTOPES