PHYSICS RESEARCH QUARTERLY REPORT, JULY-SEPTEMBER 1962

Technical Report · Mon Oct 15 04:00:00 EDT 1962

OSTI ID:4710323

A detailed comparison of recent data on differential scattering cross sections in water with Nelkin's theoretical kernel indicates that modification of the original parameters should be made. The modifications are in progress. In work on the effects of scatterers on criticality, it was found that criticality of a hydrogenous system is a function of the scatterers present. In other work, a two-group theory of exponential pile flux distributions was investigated and found to account for discrepancies between data and a fitted curve in exponential pile analysis. Measurements of B and Pu masses using the PCTR revealed that quantities of B, of the order of 0.01 g, can be measured to an accuracy of plus or minus 3% while 1.1 g Pu can be measured to an accuracy of plus or minus 9%. Criticality experiments were continued with plutonium nitrate solutions in a 14- in. diam. waterreflected stainless sphere in which criticality data were obtained as a function of the Pu concentration and solution acidity. Information and data obtained in an experiment on the limiting critical concentrations of U/sup 235/ and Pu/sup 239/ in aqueous solutions are given. (J.R.D.)

• Research Organization: General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
• DOE Contract Number: AT(45-1)-1350
• NSA Number: NSA-17-011303
• OSTI ID: 4710323
• Report Number(s): HW-75228
• Country of Publication: United States
• Language: English

Related Subjects

ACIDITY
BORON
CONCENTRATION
CRITICALITY
CROSS SECTIONS
DIAGRAMS
DISTRIBUTION
EXPONENTIAL PILES
GROUP THEORY
MASS
MEASURED VALUES
NEUTRON FLUX
PCTR
PHYSICS
PLUTONIUM
PLUTONIUM 239
PLUTONIUM NITRATES
REACTORS
REFLECTION
SCATTERING
SOLUTIONS
SPHERES
STAINLESS STEELS
URANIUM 235
WATER