MATERIAL REPLACEMENT EXPERIMENTS: THEORY AND MEASUREMENTS FOR THE LADY GODIVA ASSEMBLY
The perturbation theory for material replacement experiments in a bare assembly is given through second order, thus permitting corrections for sample size. Computed flux and adjoint distribution functions are tabulated for the Lady Godiva assembly, enabling the observed danger coefficients for U/sup 238/ and U/sup 235/ to be compared with corresponding predicted values. Consistency of this data is checked by its use in three independent combinations, each yielding the same value for the effective fraction of delayed neutrons from fast fission. Reactivity contributions associated with inelastic scattering were calculated and comparison made between central danger-coefficient ratios and ratios for the Topsy assembly. Evaluation of transport cross sections by means of replacement measurements in Godiva is illustrated for the several elements C, Cu, and Au. (auth)
- Research Organization:
- Los Alamos Scientific Lab., N. Mex.
- DOE Contract Number:
- W-7405-ENG-36
- NSA Number:
- NSA-12-001073
- OSTI ID:
- 4331952
- Report Number(s):
- LA-1525
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CONFIGURATION
COPPER
CRITICAL ASSEMBLIES
CRITICALITY
CROSS SECTIONS
DANGER COEFFICIENTS
DELAYED NEUTRONS
DISTRIBUTION
EQUATIONS
ERRORS
FAST NEUTRONS
FISSION
GODIVA-1
GOLD
GRAPHITE
INELASTIC SCATTERING
LADY GODIVA
MASS
MATERIALS TESTING
MEASURED VALUES
MECHANICAL STRUCTURES
MULTIPLICATION FACTORS
NEUTRON FLUX
NUMERICALS
PERTURBATION THEORY
PHYSICS
PROMPT NEUTRONS
REACTIVITY
REACTOR CORE
REACTORS
SCATTERING
STANDARDS
TABLES
TOPSY
TRANSPORT THEORY
URANIUM 235
URANIUM 238
VARIATIONS
ZONES