COMPUTATIONAL METHODS FOR SPACE RADIATION SHIELDING ANALYSIS. PDF Download
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
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Book Description
Analytical methods and computer programs were developed at Douglas for use in establishing the radiation shielding requirements of space vehicle systems. Current techniques for performing space radiation shielding analyses are reviewed in the context of the digital computer programs in which they have been incorporated. Calculations dealing with the transport of primary charged particles and secondary reaction products through matter are performed by the CHARGE program for geometrically simple systems. The calculation of radiation levels in geometrically complex vehicle-shield configurations is accomplished by the SIGMA program, using the QUAD generalized quadratic surface geometry package. Procedures for ascertaining the optimal distribution of shield mass subject to specific dose design criteria are presently under development.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
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Book Description
Analytical methods and computer programs were developed at Douglas for use in establishing the radiation shielding requirements of space vehicle systems. Current techniques for performing space radiation shielding analyses are reviewed in the context of the digital computer programs in which they have been incorporated. Calculations dealing with the transport of primary charged particles and secondary reaction products through matter are performed by the CHARGE program for geometrically simple systems. The calculation of radiation levels in geometrically complex vehicle-shield configurations is accomplished by the SIGMA program, using the QUAD generalized quadratic surface geometry package. Procedures for ascertaining the optimal distribution of shield mass subject to specific dose design criteria are presently under development.
Author: John William Wilson
Publisher:
ISBN:
Category : Electron transport
Languages : en
Pages : 36
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Book Description
Author: R. E. Fortney
Publisher:
ISBN:
Category :
Languages : en
Pages : 104
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Book Description
Author: J. I. Wood
Publisher: Pergamon
ISBN:
Category : Science
Languages : en
Pages : 460
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Book Description
Author: R. E. Fortney
Publisher:
ISBN:
Category : Computer programming
Languages : en
Pages : 0
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Book Description
The purpose of this study was to develop mathematical methods to assess the biological hazards of space radiation and to program these methods for the IBM 7090 using FORTRAN language. A semi-analytical approach was utilized to write machine programs for geocentric trajectories and a model astronaut inside a space vehicle. The trajectory program is used to solve the two body problem with pertubations to correct for the oblateness of the earth. The earth's magnetosphere is the space of principle interest for lunar missions, therefore lunar impact and return trajectories are considered to be two body geocentric orbits. An astronaut's head and torso are represented by two right elliptical cylinders. This model is placed inside a mathematically described space vehicle with known thicknesses in designated areas. An existent machine program was utilized to define the radiative environment in McIlwain (B, L) coordinates and supplemental computer programs were used to determine radiation doses resulting from electron and proton environments. Results from the CARS program are obtained with a small amount of machine time. For example, one tenth (.1) of an hour was required to determine the radiation dose due to two spectra (electrons and protons) at ten points in the model astronaut within the APOLLO Command Module (CM) for a given orbital mission.
Author: E. A. Warman
Publisher:
ISBN:
Category : Extraterrestrial radiation
Languages : en
Pages : 1044
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Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 780
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Book Description
Author: John William Wilson
Publisher:
ISBN:
Category : Extraterrestrial radiation
Languages : en
Pages : 496
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Book Description
The purpose of the workshop was to define requirements for the development and evaluation of high performance shield materials and designs and to develop ideas regarding approaches to radiation shielding.
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 632
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Book Description
NSA is a comprehensive collection of international nuclear science and technology literature for the period 1948 through 1976, pre-dating the prestigious INIS database, which began in 1970. NSA existed as a printed product (Volumes 1-33) initially, created by DOE's predecessor, the U.S. Atomic Energy Commission (AEC). NSA includes citations to scientific and technical reports from the AEC, the U.S. Energy Research and Development Administration and its contractors, plus other agencies and international organizations, universities, and industrial and research organizations. References to books, conference proceedings, papers, patents, dissertations, engineering drawings, and journal articles from worldwide sources are also included. Abstracts and full text are provided if available.
Author: James Wood
Publisher: Elsevier
ISBN: 1483148130
Category : Technology & Engineering
Languages : en
Pages : 450
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Book Description
Computational Methods in Reactor Shielding deals with the mathematical processes involved in how to effectively control the dangerous effect of nuclear radiation. Reactor shielding is considered an important aspect in the operation of reactor systems to ensure the safety of personnel and others that can be directly or indirectly affected. Composed of seven chapters, the book discusses ionizing radiation and how it aids in the control and containment of radioactive substances that are considered harmful to all living things. The text also outlines the necessary radiation quantities and units that are needed for a systemic control of shielding and presents an examination of the main sources of nuclear radiation. A discussion of the gamma photon cross sections and an introduction to BMIX, a computer program used in illustrating a technique in identifying the gamma ray build-up factor for a reactor shield, are added. The selection also discusses various mathematical representations and areas of shielding theory that are being used in radiation shielding. The book is of great value to those involved in the development and implementation of systems to minimize and control the dangerous and lethal effect of radiation.
