A COMPARISON OF THE PROPERTIES OF THE NELKIN AND RADKOWSKY THERMAL NEUTRON SCATTERING KERNELS FOR WATER

Technical Report · Thu Mar 01 04:00:00 EST 1962

OSTI ID:4728536

Gelbard, E M; Davis, J A; Schmidt, E

The coefficients omega /sub 0/, D/sub 0/, C and E in the expansion omega = omega /sub 0/ + D/sub 0/B/sup 2/ - CB/sup 4/ + EB/sup 6/ +... were computed u sing the Radkowsky and Nelkin kernels. It was found that both kernels give very similar pulse parameters. Extrapolation distances were computed, using both kernels, for pulsed slabs of water. Again no significant differences were observed. Differences between the Nelkin and Radkowsky flux shapes in TRX lattices are quite small: they would be difficult to detect experimentally. It appeared that thermal neutron flux shapes and decay rates are not very sensitive to details in the structure of the scattering kernel. Yet neither the Nelkin nor the Radowsky kernels yielded flux shapes and decay rates in good agreement with experiment. (auth)

• Research Organization: Westinghouse Electric Corp. Bettis Atomic Power Lab., Pittsburgh
• DOE Contract Number: AT(11-1)-GEN-14
• NSA Number: NSA-17-009482
• OSTI ID: 4728536
• Report Number(s): WAPD-T-1481
• Country of Publication: United States
• Language: English

Related Subjects

DECAY
MECHANICAL STRUCTURES
NELKIN THEORY
NEUTRON FLUX
PHYSICS
PLATES
PULSES
REACTORS
SCATTERING
THERMAL NEUTRONS
TRX
WATER