NEUTRON FLUXES IN CONCRETE DUCTS DUE TO INCIDENT EPICADMIUM NEUTRONS: CALCULATIONS AND EXPERIMENTS,
Abstract
Monte Carlo calculations were carried out to determine subcadmium and epicadmium neutron flux distributions along the center line of a straight, a two-legged, and a three-legged square concrete duct arising from the slowing down of incident epicadmium neutrons for a particularly demanding source geometry and spectrum. The calculations used albedo data differential both in the reflected angles and reflected energy which were reported previously for concrete (See AD-642 522 and AD-649 617). A comparison of the results of these calculations with those from a geometrically similar experiment shows good agreement and places on a firm foundation the concept of treating neutron slowing down in a concrete duct as a reflection phenomenon at a point which is describable by the differential albedo properties of the walls. The conclusion is also reached that the dose rates arising from the subcadmium neutrons (whether due to an epicadmium source or a subcadmium source) and associated secondary wall capture gamma rays can comprise a very important part of the total absorbed dose rate in tissue deep inside a multi-legged duct. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 17, 1967
- Accession Number
- AD0652794
Entities
People
- F. J. Muckenthaler
- R. E. Maerker
Organizations
- Oak Ridge National Laboratory