Fast neutron penetration through an axially-symmetrical shield (in Russian)
The shield is broken up into arbitrary layers with twofold attenuation of neutrons and with corresponding equalization of the neutron attenuation over the shield depth. This procedure was programmed on a computer for shielding computations. From this program it is possible to calculate integral fluxes of neutrons with energies of 0.1 to 14 MeV both within and outside the finite barrier edges of ltthium hydride which can be considered as a material consisting of /sup 1/H and /sup 7/Li atoms. The following interaction processes are taken into account: elastic scattering on hydrogen, elastic scattering on lithium, inelastic scattering on lithium, and absorption. The neutron (E > 1 MeV) attenuation is given as a function of the lithium hydride shield thickness for a plane source of fission neutrons. The fast neutron spectra at various shield depths are presented. In cylindrical, LiH block 45 g/cm/sup 2/ thick and 60 cm in diameter the neutron (E> 3 MeV) attenuation is given as a function of the shield-detector distance for neutron sources with various angular distributions. The fast neutron spectra are presented for the same LiH shield block at various distances from its surface with a mono-directed and cosinusoidal sources. Buildup factors are given as a function of the thickness of the cylindrical shield and of its radius (the source is mono-directed; the radii of the source and shield are equal). (SJR)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-29-006791
- OSTI ID:
- 4394991
- Journal Information:
- At. Energ. (USSR), v. 34, no. 6, pp. 487-490, Journal Name: At. Energ. (USSR), v. 34, no. 6, pp. 487-490; ISSN AENGA
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
Similar Records
REACTOR SHIELDING INFORMATION MEETING, CHICAGO, NOVEMBER 12 AND 13, 1953
Calculation of neutron and gamma-ray energy spectra for fusion reactor shield design: Comparison with experiment-II
Related Subjects
*NEUTRON FLUX-- SHIELDING
*SHIELDING-- COMPUTER CALCULATIONS
CYLINDERS
ELASTIC SCATTERING
FAST NEUTRONS
HYDROGEN
INELASTIC SCATTERING
KEV RANGE
LITHIUM
MEV RANGE
N72400* --Physics (Radiation & Shielding)--Shielding Calculations & Experiments
NEUTRON SOURCES