DOPPLER CALCULATIONS FOR LARGE FAST CERAMIC REACTORS--EFFECTS OF IMPROVED METHODS AND RECENT CROSS SECTION INFORMATION

Technical Report · Wed Dec 19 04:00:00 EST 1962

OSTI ID:4701453

Greebler, P; Goldman, E

Doppler calculations for large fast ceramic reactors (FCR), using recent cross section information and improved methods, are described. Cross sections of U/sup 238/, Pu/sup 239/, and Pu/sup 210/ with fuel temperature variations needed for perturbation calculations of Doppler reactivity changes are tabulated as a function of potential scattering cross section per absorber isotope at energies below 400 kev. These may be used in Doppler calculations for anv fast reactor. Results of Doppler calculations on a large fast ceramic reactor are given to show the effects of the improved calculation methods and of recent cross secrion data on the calculated Doppler coefficient. The updated methods and cross sections used yield a somewhat harder spectrum and accordingly a somewhat smaller Doppler coefficient for a given FCR core size and composition than calculated in earlier work, but they support the essential conclusion derived earlier that the Doppler effect provides an important safety advantage in a large FCR. 28 references. (auth)

• Research Organization: General Electric Co. Atomic Power Equipment Dept., San Jose, Calif.
• NSA Number: NSA-17-029710
• OSTI ID: 4701453
• Report Number(s): GEAP-4092
• Country of Publication: United States
• Language: English

Related Subjects

BIBLIOGRAPHY
CERAMICS
CROSS SECTIONS
DOPPLER EFFECT
FAST NEUTRONS
FCR
KEV RANGE
PLUTONIUM 240
REACTOR TECHNOLOGY
REACTORS
SPECTRA
SPECTRAL SHIFT
TABLES
TEMPERATURE
URANIUM 238
VARIATIONS
VELOCITY