Matching Items (2)
Description
In September 1945, after the atomic bombings of Hiroshima and Nagasaki, the United States possessed only one nuclear weapon. Thirteen years later, in September 1958, the nation possessed a significant stockpile of nuclear weapons, including the very powerful hydrogen bomb. The United States was able to build its stockpile of nuclear weapons because the Los Alamos Laboratory, once a secret wartime facility, was able to convert the forces of nature – fission and fusion – into weapons of war. The United States also was successful because of the sacrifice made by a tiny Pacific Ocean nation, The Marshall Islands, and the people of Bikini, Enewetak, and Rongelap Atolls. Between 1946 and 1958, the United States tested sixty-six nuclear weapons in the Marshall Islands. Nuclear testing contaminated these three atolls and, in one instance, injured the people of Rongelap. As a result of this testing many of these people cannot return to their ancestral homes. This dissertation examines the many conditions that led to the creation of the Los Alamos Laboratory, its testing of nuclear weapons in the Marshall Islands, and the long term, perhaps, permanent, displacement of the people of Bikini, Enewetak, and Rongelap.
ContributorsMeade, Roger (Author) / Vandemeer, Philip (Thesis advisor) / Longley, Rodney (Committee member) / Francis, Sybil (Committee member) / Arizona State University (Publisher)
Created2015
Description
With the status of nuclear proliferation around the world becoming more and more complex, nuclear forensics methods are needed to restrain the unlawful usage of nuclear devices. Lithium-ion batteries are present ubiquitously in consumer electronic devices nowadays. More importantly, the materials inside the batteries have the potential to be used as neutron detectors, just like the activation foils used in reactor experiments. Therefore, in a nuclear weapon detonation incident, these lithium-ion batteries can serve as sensors that are spatially distributed.
In order to validate the feasibility of such an approach, Monte Carlo N-Particle (MCNP) models are built for various lithium-ion batteries, as well as neutron transport from different fission nuclear weapons. To obtain the precise battery compositions for the MCNP models, a destructive inductively coupled plasma mass spectrometry (ICP-MS) analysis is utilized. The same battery types are irradiated in a series of reactor experiments to validate the MCNP models and the methodology. The MCNP nuclear weapon radiation transport simulations are used to mimic the nuclear detonation incident to study the correlation between the nuclear reactions inside the batteries and the neutron spectra. Subsequently, the irradiated battery activities are used in the SNL-SAND-IV code to reconstruct the neutron spectrum for both the reactor experiments and the weapon detonation simulations.
Based on this study, empirical data show that the lithium-ion batteries have the potential to serve as widely distributed neutron detectors in this simulated environment to (1) calculate the nuclear device yield, (2) differentiate between gun and implosion fission weapons, and (3) reconstruct the neutron spectrum of the device.
In order to validate the feasibility of such an approach, Monte Carlo N-Particle (MCNP) models are built for various lithium-ion batteries, as well as neutron transport from different fission nuclear weapons. To obtain the precise battery compositions for the MCNP models, a destructive inductively coupled plasma mass spectrometry (ICP-MS) analysis is utilized. The same battery types are irradiated in a series of reactor experiments to validate the MCNP models and the methodology. The MCNP nuclear weapon radiation transport simulations are used to mimic the nuclear detonation incident to study the correlation between the nuclear reactions inside the batteries and the neutron spectra. Subsequently, the irradiated battery activities are used in the SNL-SAND-IV code to reconstruct the neutron spectrum for both the reactor experiments and the weapon detonation simulations.
Based on this study, empirical data show that the lithium-ion batteries have the potential to serve as widely distributed neutron detectors in this simulated environment to (1) calculate the nuclear device yield, (2) differentiate between gun and implosion fission weapons, and (3) reconstruct the neutron spectrum of the device.
ContributorsZhang, Taipeng (Author) / Holbert, Keith E. (Thesis advisor) / Karady, George G. (Committee member) / Qin, Jiangchao (Committee member) / Metzger, Robert (Committee member) / Arizona State University (Publisher)
Created2017