WEAPONS RADIATION SHIELDING HANDBOOK. CHAPTER 3. METHODS FOR CALCULATING NEUTRON AND GAMMA-RAY ATTENUATION,
Abstract
Calculations of the attenuation of neutrons and gamma rays in shields can be performed by several techniques, the best technique for a particular problem depending on the type of problem to be solved and the degree of accuracy required. This chapter of the Handbook surveys the calculational methods used most frequently and provides summaries of digital computer codes based on the various methods. The methods covered are those of spherical harmonics, discrete ordinates, moments, Monte Carlo, diffusion theory, invariant imbedding, and kernels, plus a method which combines a removal kernel with diffusion theory. Except for the invariant imbedding method, all these techniques are either approximate solutions to the well-known Boltzmann equation or are based on kernels obtained from solutions to the equation. A discussion of the Boltzmann equation is also included in the chapter. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1968
- Accession Number
- AD0666973
Entities
People
- David K. Trubey
- Paul N. Stevens
Organizations
- Oak Ridge National Laboratory