Download or read book Science Based Stockpile Stewardship written by and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The FY1994 National Defense Authorization Act calls on the Secretary of Energy to establish a stewardship program to ensure the preservation of the core intellectual and technical competencies of the United States in nuclear weapons. The DOE asked JASON to review its Science Based Stockpile Stewardship program with respect to three criteria: (1) contributions to important scientific and technical understanding and to national goals; (2) contributions to maintaining and renewing the technical skill base and overall level of scientific competence in the defense program and the weapons labs, and to the broader U.S. scientific and engineering strength; and (3) contributions to maintaining U.S. confidence in our nuclear stockpile without nuclear testing through improved understanding of weapons physics and diagnostics. In this report JASON analyzes the DOE program and makes specific recommendations regarding it. Stewardship, Hydrotests, Pulsed power, Advanced computing, Sbss program, Non-proliferation.

Download or read book Science Based Stockpile Stewardship written by C. Callan and published by . This book was released on 1994 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: The FY1994 National Defense Authorization Act calls on the Secretary of Energy to establish a stewardship program to ensure the preservation of the core intellectual and technical competencies of the United States in nuclear weapons. The DOE asked JASON to review its Science Based Stockpile Stewardship program with respect to three criteria: (1) contributions to important scientific and technical understanding and to national goals; (2) contributions to maintaining and renewing the technical skill base and overall level of scientific competence in the defense program and the weapons labs, and to the broader U.S. scientific and engineering strength; and (3) contributions to maintaining U.S. confidence in our nuclear stockpile without nuclear testing through improved understanding of weapons physics and diagnostics. In this report JASON analyzes the DOE program and makes specific recommendations regarding it. Stewardship, Hydrotests, Pulsed power, Advanced computing, Sbss program, Non-proliferation.

Download or read book Science Based Stockpile Stewardship Uncertainty Quantification and Surrogate Reactions written by and published by . This book was released on 2009 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stewardship of this nation's nuclear weapons is predicated on developing a fundamental scientific understanding of the physics and chemistry required to describe weapon performance without the need to resort to underground nuclear testing and to predict expected future performance as a result of intended or unintended modifications. In order to construct more reliable models, underground nuclear test data is being reanalyzed in novel ways. To improve the interpretation of these experiments with quantified uncertainties, improved nuclear data is required. As an example, the thermonuclear yield of a device was often inferred through the use of radiochemical detectors. Conversion of the detector activations observed to thermonuclear yield was accomplished through explosion code calculations (models) and a good set of nuclear reaction cross-sections. Because of the unique high-fluence environment of an exploding nuclear weapon, many reactions occurred on radioactive nuclides, for which only theoretically calculated cross-sections are available. Surrogate nuclear reactions at STARS/LIBERACE offer the opportunity to measure cross-sections on unstable nuclei and thus improve the quality of the nuclear reaction cross-section sets. One radiochemical detector that was loaded in devices was mono-isotopic yttrium (89Y). Nuclear reactions produced 87Y and 88Y which could be quantified post-shot as a ratio of 87Y/88Y. The yttrium cross-section set from 1988 is shown in Figure 1(a) and contains approximately 62 cross-sections interconnecting the yttrium nuclides. The 6 experimentally measured cross-sections are shown in Figure 1(b). Any measurement of cross-sections on 87Y or 88Y would improve the quality of the cross-section set. A recent re-evaluation of the yttrium cross-section set was performed with many more calculated reaction cross-sections included.

Download or read book Stockpile Stewardship in an Era of Renewed Strategic Competition written by Brad Roberts and published by . This book was released on 2022-03-31 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the end of the Cold War, the United States has maintained the safety and effectiveness of its aging nuclear arsenal through the stockpile stewardship program. This program utilizes advanced scientific and computational means as a substitute for underground explosive nuclear testing. For three decades, science-based stockpile stewardship has served the United States well. But as the global security environment has evolved, and relationships with Russia and China have been more competitive and confrontational, it is necessary to examine whether and how the U.S. approach to maintaining a nuclear deterrent might need to evolve. Russia and China have also maintained nuclear deterrents with advanced scientific and computational means; but they have gone well beyond the stewardship of legacy capabilities to modernize and significantly adapt their arsenals. Rather than compete with both on their terms, the United States must compete on its own terms with an eye to maintaining deterrence, assurance, and strategic stability.

Download or read book Stockpile Stewardship Program Strategy written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In announcing the extension of the moratorium on nuclear testing, President Clinton reaffirmed the importance of maintaining confidence in the enduring U.S. nuclear stockpile: ''To assure that our nuclear deterrent remains unquestioned under a test ban, we will explore other means of maintaining our confidence in the safety, reliability, and performance of our weapons.'' To this end, the Department of Energy's nuclear weapon program is undergoing fundamental change--from advancing military characteristics to maintaining the reliability and safety of the existing stockpile. Consequently, a new strategy was needed to meet these new mission requirements. This report summarizes the new strategy. The fundamental premise of the new strategy lies in the ability to respond to problems in monitoring and maintaining the existing stockpile by preserving specialized facilities, maintaining the skill and knowledge bases, and advancing our understanding of nuclear weapon physics necessary to manage the nuclear future in an era without nuclear testing. The foundation of this Science-based Stockpile Stewardship strategy was laid at a workshop attended by DOE officials, DoD customers, stakeholders from other government agencies, nuclear weapon experts, and members of the scientific community. The principles of the evolving strategy were regularly discussed during the formative stages with the primary customers and stakeholders and reviewed by the JASONs. This report summarizes the strategy as it now exists, but we recognize that stockpile stewardship must be a continuing process--updated as necessary to respond to national security objectives.

Download or read book Science Based Stockpile Stewardship Uncertainty Quantification and Fission Fragment Beams written by and published by . This book was released on 2009 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stewardship of this nation's nuclear weapons is predicated on developing a fundamental scientific understanding of the physics and chemistry required to describe weapon performance without the need to resort to underground nuclear testing and to predict expected future performance as a result of intended or unintended modifications. In order to construct more reliable models, underground nuclear test data is being reanalyzed in novel ways. The extent to which underground experimental data can be matched with simulations is one measure of the credibility of our capability to predict weapon performance. To improve the interpretation of these experiments with quantified uncertainties, improved nuclear data is required. As an example, the fission yield of a device was often determined by measuring fission products. Conversion of the measured fission products to yield was accomplished through explosion code calculations (models) and a good set of nuclear reaction cross-sections. Because of the unique high-fluence environment of an exploding nuclear weapon, many reactions occurred on radioactive nuclides, for which only theoretically calculated cross-sections are available. Inverse kinematics reactions at CARIBU offer the opportunity to measure cross-sections on unstable neutron-rich fission fragments and thus improve the quality of the nuclear reaction cross-section sets. One of the fission products measured was 95Zr, the accumulation of all mass 95 fission products of Y, Sr, Rb and Kr (see Fig. 1). Subsequent neutron-induced reactions on these short lived fission products were assumed to cancel out - in other words, the destruction of mass 95 nuclides was more or less equal to the production of mass 95 nuclides. If a 95Sr was destroyed by an (n,2n) reaction it was also produced by (n,2n) reactions on 96Sr, for example. However, since these nuclides all have fairly short half-lives (seconds to minutes or even less), no experimental nuclear reaction cross-sections exist, and only theoretically modeled cross-sections are available. Inverse kinematics reactions at CARIBU offer the opportunity, should the beam intensity be sufficient, to measure cross-sections on a few important nuclides in order to benchmark the theoretical calculations and significantly improve the nuclear data. The nuclides in Fig. 1 are prioritized by importance factor and displayed in stoplight colors, green the highest and red the lowest priority.

Download or read book Science Based Stockpile Stewardship written by C. Callan and published by . This book was released on 1994 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multiscale Science for Science based Stockpile Stewardship written by and published by . This book was released on 2000 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The goal of this project has been to develop and apply the methods of multi scale science to the problems of fluid and material mixing due to instability and turbulence, and of materials characterization. Our specific focus has been on the SBSS (science-based stockpile stewardship) issue of assessing the performance of a weapons with off-design, aged, or remanufactured components in the absence of full-scale testing. Our products are physics models, based on microphysical principles and parameters, and suitable for implementation in the large scale design and assessment codes used in the nuclear weapons program.

Download or read book Stockpiles Stewardship Program written by A. Fitzpatrick and published by . This book was released on 2007 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear weapons, while simple in principle, are technically complex devices with a multitude of components. There may be concern that, over time, a weapon¿s ability could decline unless mitigating precautions are taken. To coordinate our ability to maintain the nation¿s existing nuclear weapons, the Nat. Nuclear Security Agency developed a Stockpile Stewardship Program (SSP). Three major components of SSP are seriously over budget & seriously behind schedule. Contents: A Brief Review of the Origins of Nuclear Testing; The CTBT & the Birth of the Science-Based Stockpile Stewardship Program; The Scientific Tools, or ¿Three Pillars,¿ of SSP; SSP¿s Newer Tools: JASPER & the Z Machine; & Conclusions, SSP 15 Years On. Illustrations.

Download or read book Underpinning Science Based Stockpile Stewardship with LANSCE written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stockpile Stewardship written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Heritage of Science" is a short video that highlights the Stockpile Stewardship program at Los Alamos National Laboratory. Stockpile Stewardship was conceived in the early 1990s as a national science-based program that could assure the safety, security, and effectiveness of the U.S. nuclear deterrent without the need for full-scale underground nuclear testing. This video was produced by Los Alamos National Laboratory for screening at the Lab's Bradbury Science Museum in Los Alamos, NM and is narrated by science correspondent Miles O'Brien.

Download or read book Science and Technology in the Stockpile Stewardship Program S TR Reprints written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This document reports on these topics: Computer Simulations in Support of National Security; Enhanced Surveillance of Aging Weapons; A New Precision Cutting Tool: The Femtosecond Laser; Superlasers as a Tool of Stockpile Stewardship; Nova Laser Experiments and Stockpile Stewardship; Transforming Explosive Art into Science; Better Flash Radiography Using the FXR; Preserving Nuclear Weapons Information; Site 300Õs New Contained Firing Facility; The Linear Electric Motor: Instability at 1,000 gÕs; A Powerful New Tool to Detect Clandestine Nuclear Tests; High Explosives in Stockpile Surveillance Indicate Constancy; Addressing a Cold War Legacy with a New Way to Produce TATB; JumpinÕ Jupiter! Metallic Hydrogen; Keeping the Nuclear Stockpile Safe, Secure, and Reliable; The Multibeam FabryĐPerot Velocimeter: Efficient Measurements of High Velocities; Theory and Modeling in Material Science; The Diamond Anvil Cell; Gamma-Ray Imaging Spectrometry; X-Ray Lasers and High-Density Plasma.

Download or read book Integrated Safety Management Approach for the Approval and Conduct of Subcritical Experiments SCE for the Science based Nuclear Stockpile Stewardship Program written by and published by . This book was released on 1997 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Science Based Stockpile Stewardship and RIA written by and published by . This book was released on 2003 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: One aspect of Science Based Stockpile Stewardship (SBSS) is to improve the quality of neutron cross section data for certain isotopes. The isotopes of interest are used to monitor neutron and charged particle fluxes in environments of brief, intense neutron fluxes. The accuracy of flux determination is dependent on the accuracy of cross section data for the stable isotopes loaded into the system and the unstable isotopes produced when the neutrons are incident on the monitor. For isotopes with a half-life greater than one day it is possible, given the production rates of RIA, to make radioactive targets for neutron irradiation. This would require the ability to harvest isotopes at RIA, an onsite radiochemistry facility for processing the harvested material into a target, and an onsite neutron source facility. The radiochemistry facility will need to handle activity levels on the order of 100's of Curie's while the neutron source facility will need to provide high intensity ''monoenergetic'' neutrons from 10's keV to 20 MeV. For isotopes with a half-life much less than one day, only indirect methods can be used to get information on the neutron cross sections because of the lack of a target. Both experimental techniques will be discussed with their impact on the infrastructure at RIA, as well as the general case for the interest of SBSS in RIA.

Download or read book NIF Frequently Asked Questions written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Stockpile Stewardship Program is an initiative to maintain the nuclear deterrent of the United States in the post-Cold War era. It is based on the maintenance of our stockpile through an ongoing process of surveillance, assessment, refurbishment, and recertification, without nuclear testing. At the heart of the SSP is an attempt to bring advanced experimental and computational tools to bear on the evaluation and certification of the stockpile itself; these advanced scientific capabilities are necessary because of the cessation of nuclear testing. This science-based approach requires new tools: advanced computers for more detailed 3-D simulations, multi-axis hydrodynamic facilities and plutonium research facilities for physics measurements of primaries, and the National Ignition Facility for fusion burn and high-energy-density science. The science basis requires summing up the pieces we can measure and simulate, which cannot be done without a complete set of tools. Refurbishing weapons with confidence, without testing, is a difficult challenge. Only with high-quality scientists and a complete set of tools, can the US accomplish this program. NIF is a unique element of the Stockpile Stewardship Program because it is the only facility that will allow the experimental study of thermonuclear burn and important regimes of high-energy-density science. Understanding these phenomena is critical to understanding how modern nuclear weapons work. NIF supports the Stockpile Stewardship Program in three essential ways: (1)It permits the study of issues that can affect an aging or refurbished stockpile. (2) It permits advancement of the critical elements of the underlying science of nuclear weapons. (3) It will attract and help train the exceptional scientific and technical talent required to sustain Stockpile Stewardship over the long term.

Download or read book The Safety Security Reliability and Performance of the U S Nuclear Stockpile written by United States. Congress. House. Committee on Armed Services. Subcommittee on Military Procurement and published by . This book was released on 2003 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Weaponeers of Waste written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: