The ²⁵²Cf-Source-Driven Noise Measurements of Unreflected Uranium Hydride Cylinder Subcriticality

Conference · Sun Jun 02 00:00:00 EDT 1991 · Transactions of the American Nuclear Society

OSTI ID:5923513

Mihalczo, J. T. ^[1]; Pare, V. K. ^[1]; Blakeman, E. D. ^[1]

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1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Subcritical neutron multiplication factors have been measured by the ²⁵²Cf-source-driven noise analysis method for unreflected, 15.0-cm-diam uranium hydride cylinders of varying heights. Because of the difficulty and cost of controlling the H/U ratio in damp uranium (93.2 wt% ²³⁵U) oxide power and fabricating sufficient material for experiments, few experiments have been performed with materials of low H/U ratios. These measurements may provide alternate information that can be used for verifying calculational methods since the H/U ratio for this material is 3.00. These measurements, which are the first application of this method to uranium hydride, were performed at the Los Alamos National Laboratory Critical Experiments Facility in 1989. These measurements were used to demonstrate the capability of this measurement method for this type of material and to provide a benchmark experiment for calculational methods with slightly moderated systems. Previous experiments by this method were for a wide variety of well-moderated systems or unmoderated uranium metal cylinders.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
• OSTI ID: 5923513
• Report Number(s): CONF-910603-; CODEN: TANSA
• Journal Information: Transactions of the American Nuclear Society, Vol. 63; Conference: Annual Meeting of the American Nuclear Society (ANS), Orlando, FL (United States), 2-6 Jun 1991; ISSN 0003-018X
• Publisher: American Nuclear Society
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
HIGHLY ENRICHED URANIUM
CRITICALITY
URANIUM HYDRIDES
BENCHMARKS
CALCULATION METHODS
CALIFORNIUM 252
CONCRETES
CYLINDERS
FABRICATION
LANL
LITHIUM
M CODES
MEASURING METHODS
MODERATORS
MULTIPLICATION FACTORS
NUCLEAR DATA COLLECTIONS
POWDERS
SOLID SCINTILLATION DETECTORS
SUBCRITICALITY
TEST FACILITIES
URANIUM 235
ACTINIDE COMPOUNDS
ACTINIDE ISO
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ACTINIDES
ALKALI METALS
ALPHA DECAY RADIOISOTOPES
BUILDING MATERIALS
CALIFORNIUM ISOTOPES
COMPUTER CODES
ELEMENTS
ENRICHED URANIUM
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HEAVY NUCLEI
HYDRIDES
HYDROGEN COMPOUNDS
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPE ENRICHED MATERIALS
ISOTOPES
MATERIALS
MEASURING INSTRUMENTS
METALS
MINUTES LIVING RADIOISOTOPES
NATIONAL ORGANIZATIONS
NUCLEI
RADIATION DETECTORS
RADIOISOTOPES
SCINTILLATION COUNTERS
SPONTANEOUS FISSION RADIOISOTOPES
URANIUM
URANIUM COMPOUNDS
URANIUM ISOTOPES
US DOE
US ORGANIZATIONS
YEARS LIVING RADIOISOTOPES
Nuclear Criticality Safety Program (NCSP)
Subcritical Neutron Multiplication Factors
Measurements
252Cf-Source-Driven-Noise Measurements
420203* - Engineering- Handling Equipment & Procedures
440101 - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments