Download or read book Shielding for Nuclear Rockets written by James E. Norman and published by . This book was released on 1954 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radiation Shielding for Space Nuclear Propulsion written by Jarvis A. Caffrey and published by . This book was released on 2017 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear thermal propulsion (NTP) is a viable technology for near-term interplanetary exploration. Of the candidate mission architectures that are currently available for a crewed Mars mission, NTP permits the greatest flexibility in launch window selection and provides the shortest possible trip time, thereby reducing risks associated with cosmic ray exposure, microgravity, isolation, and life-support system reliability. A set of methods and tools were developed for designing and evaluating the radiation shielding required to enable the use of nuclear propulsion technologies. The tools produced in this work are coupled with MCNP6 to perform Monte Carlo radiation transport simulations. A method was developed for calculating the time-dependent dose rate that varies dramatically as the propellant (which acts as an inherent shield) is consumed, and as the delayed fission product sources of photons are produced during engine operation and decayed after shutdown. The radiation environment surrounding the nuclear engines was evaluated and mapped into useful iso-line contours, and was recorded and reimplemented as a source term for evaluation of shielding strategies. A multiobjective optimization algorithm (MOEA) was developed to explore candidate shield designs. The MOEA allows simultaneous changes in both discrete parameters (e.g. material selection) and continuous parameters (e.g. thickness and diameter). The design space is thus efficiently explored such that a set of optimal design solutions are produced that perform best at both minimizing the effects of penetrating radiation and doing so at minimal mass expense. Rather than produce and optimize single point-designs, this method produces curves of optimal solutions that are most useful in early-stage design trades where performance requirements are still an uncertainty. A tool for visualization of the design space following an optimization case was produced, and two example scenarios were evaluated to demonstrate the use of those methods produced in this work. Radiation shield design is a complex and iterative process that must be considered early in the design of both a nuclear engine and a full propulsion stage. There are many significant interfaces introduced by penetrating nuclear radiation that are not typical of most flight systems, and the methods employed in this work may be used to characterize their effects.

Download or read book Principles of Nuclear Rocket Propulsion written by William J. Emrich Jr. and published by Elsevier. This book was released on 2023-03-11 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles of Nuclear Rocket Propulsion, Second Edition continues to put the technical and theoretical aspects of nuclear rocket propulsion into a clear and unified presentation, providing an understanding of the physical principles underlying the design and operation of nuclear fission-based rocket engines. This new edition expands on existing material and adds new topics, such as antimatter propulsion, nuclear rocket startup, new fuel forms, reactor stability, and new advanced reactor concepts. This new edition is for aerospace and nuclear engineers and advanced students interested in nuclear rocket propulsion. - Provides an understanding of the physical principles underlying the design and operation of nuclear fission-based rocket engines - Includes a number of example problems to illustrate the concepts being presented - Contains an electronic version with interactive calculators and rotatable 3D figures to demonstrate the physical concepts being presented - Features an instructor website that provides detailed solutions to all chapter review questions

Download or read book Reactor and Shielding Design Implications of Clustering Nuclear Thermal Rockets written by John J. Buksa and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shielding Computer Program 11 0 Reactor Shield Analysis written by K.B. Hanchon and published by . This book was released on 1958 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Rocket Shielding Methods Modification Updating and Input Data Preparation Volume IV One dimensional Discrete Ordinates Transport Technique Final Progress Report written by and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An IBM 704 Program Report written by J. W. Haffner and published by . This book was released on 1959 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shielding and Nuclear Propulsion written by Robert F. Trapp and published by . This book was released on 1959 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Rocket Shielding Methods Modification Updating and Input Data Preparation written by and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shielding Computer Program 20 0 written by J. E. MacDonald and published by . This book was released on 1961 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Rocket Shielding Methods Modification Updating and Input Data Preparation written by Westinghouse Electric Corporation. Astronuclear Laboratory and published by . This book was released on 1970* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Rocket Shielding Methods Modification Updating and Input Data Preparation Volume V Two dimensional Discrete Ordinates Transport Technique written by and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Rocket Shielding Methods Modification Updating and Input Data Preparation Volume I Synopsis of Methods and Results of Analysis Final Progress Report written by and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Rocket Shielding Methods Modification Updating and Input Data Preparation Volume VI Point Kernel Techniques Final Progress Report written by and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radiation Shield Design Considerations for Nuclear Rocket Space Vehicles written by Paul H. Sager and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book IBM 704 Program Report written by J. W. Haffner and published by . This book was released on 1958 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radiation Protection Reports of the Interagency Task Force on Ionizing Radiation written by United States. Congress. Senate. Committee on Governmental Affairs. Subcommittee on Energy, Nuclear Proliferation, and Federal Services and published by . This book was released on 1979 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: