CALCULATION OF NEUTRON AGE AND MOMENTS OF THE NEUTRON SLOWING DOWN DENSITY DISTRIBUTION IN HYDROCARBONS
Technical Report
·
OSTI ID:4799295
An evaluation relating to the substitution of a cold moderator in the high temperature POPR critical experi-ments was undertaken. One aspect of this evaluation was an attempt to match'' neutron ages for the hot and cold moderator. Calculations showed that a mixture of furfural and om-terphenyl-25% diphenyl does not satisfy the age matching requirement. The results of the calculation gave for the slowing down age of the hot and cold moderators respectively: 64.0 plus or minus 0.5 cm/sup 2/ and 52.4 plus or minus 0.4 cm/ sup 2/. Tables and curves of the moments of the neutron slowing down distribution as a function of C/H ratio are presented. All data were normalized to a mass density of 1.0 gm/cc. There appeared to be very good agreement between data read from the curves and previously calculated results. (auth)
- Research Organization:
- Atomics International. Div. of North American Aviation, Inc., Canoga Park, Calif.
- DOE Contract Number:
- AT(11-1)-GEN-8
- NSA Number:
- NSA-16-013928
- OSTI ID:
- 4799295
- Report Number(s):
- NAA-SR-Memo-6866
- Country of Publication:
- United States
- Language:
- English
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