ANALYSIS OF THE CRITICAL SHIELDING VOLUME FOR UNDERGROUND SHELTERS
Abstract
The development of design principles for constructing atomic warfare shelters for naval shore establishments is descrived. part of this problem is evaluating various systems for protection against nuclear radiation. this report presents the results of an investigation to determine which part of the earth covering a buried shelter is the most important as a radiation shield. the following equations: (1-f) e1(uix) equals e1(uix sec theta) when solved for the critical angle, theta will define the volume of earth which provides the fraction, f, of the total shielding to the shelter system. e1 is the expontial integral; ui is the effective linear absorption coefficient for the shield material; x is the effective shield thickness. computations have been completed for slab and hemisphere geometry for fractions, f, of 0.99 and 0.999. for slab geometry x is equivalent to tm, the thickness of the slab shield. for hemispherical geometry x is equivalent to rm which is the sum of the radius of the hemisphere plus the minimum cover over the arch. in order to preserve the shielding integrity of the shelter system, the shielding volume defined by theta should not be violated by openings of any sort such as vents, ducts, and entranceways.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1960
- Accession Number
- AD0250640
Entities
People
- J. C. Ledoux
Organizations
- Naval Facilities Engineering Service Center