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Tsunami Detection and Warnings for the United States

Description: This report discusses topics in respect to tsunami disaster warnings for the United States, discussions ensued between the Department of Homeland Security (DHS) and the National Oceanic and Atmospheric Administration (NOAA) about developing a multi-hazard warning and response system.
Date: September 25, 2008
Creator: Morrissey, Wayne A.
Partner: UNT Libraries Government Documents Department

Indian Ocean Earthquake and Tsunami: Humanitarian Assistance and Relief Operations

Description: This report summarizes the extent of the disaster and relief effort and includes descriptions of the U.S. and international assistance efforts. It also examines protection mechanisms for children and separated orphans. A section is devoted to the situation in each of the affected countries followed by an analysis of selected issues for Congress.
Date: March 21, 2005
Creator: Margesson, Rhoda
Partner: UNT Libraries Government Documents Department

Kingman reef

Description: This memorandum describes the search for an acceptable test site for surface detonations of nuclear devices. Concern is expressed over possible Tsunami hazards. Kingman Reef is recommended as a designated target area, and it is recommended that Palmyra Island be investigated as to availability.
Date: February 17, 1965
Creator: Gilbert, F. C.
Partner: UNT Libraries Government Documents Department

Damage from the impacts of small asteroids

Description: The fragmentation of a small asteroid in the atmosphere greatly increases its aerodynamic drag and rate of energy dissipation. The differential atmospheric pressure across it disperses its fragments at a velocity that increases with atmospheric density and impact velocity and decreases with asteroid density. Extending our previous work, we use a spherical atmosphere and a fitted curve to its density profile to find the damage done by an asteroid entering the atmosphere at various zenith angles. In previous work we estimated the blast damage by scaling from data on nuclear explosions in the atmosphere during the 1940s, 1950s and early 1960s. This underestimated the blast from asteroid impacts because nuclear fireballs radiate away a larger fraction of their energy than do meteors, so less of their energy goes into the blast wave. We have redone the calculations to allow for this effect. We have found the area of destruction around the impact point in which the over pressure in the blast wave exceeds 4 pounds/inch{sup 2} = 2.8 X 10{sup 5} dynes/cm{sup 3}, which is enough to knock over trees and destroy buildings. About every 100 years an impactor should blast an area of 300 km{sup 2} or more somewhere on the land area of Earth. The optical flux from asteroids 60 meters or more in diameter is enough to ignite pine forests. However, the blast from an impacting asteroid goes beyond the radius within which the fire starts. It tends to blow out the fire, so it is likely that the impact will char the forest (as at Tunguska), but it will not produce a sustained fire. Because of the atmosphere, asteroids less than about 200 m in diameter are not effective in producing craters and earthquakes. They are also not effective in producing water waves and tsunami in ...
Date: August 15, 1996
Creator: Hills, J.G. & Goda, M.P.
Partner: UNT Libraries Government Documents Department

The U.S. Tsunami Program: A Brief Overview

Description: The National Oceanic and Atmospheric Administration's (NOAA's) National Weather Service (NWS) manages two tsunami warning centers that monitor, detect, and issue warnings for tsunamis. This report discusses these centers, which monitor and evaluate data from seismic networks and determine if a tsunami is likely based on the location, magnitude, and depth of an earthquake.
Date: March 18, 2015
Creator: Folger, Peter
Partner: UNT Libraries Government Documents Department

The Japanese Nuclear Incident: Technical Aspects

Description: The Japanese earthquake and tsunami of March 2011 caused extensive damage to the Fukushima Daiichi Nuclear Power Plant (NPP). This damage has released some radioactive materials, and there are widespread fears about the health effects of current and possible future releases. These fears, and public concern about radiation in general, have attracted the world’s attention. This report presents scientific and technical aspects of these issues in order to provide a basis for understanding the risks associated with this event.
Date: March 31, 2011
Creator: Medalia, Jonathan
Partner: UNT Libraries Government Documents Department

The Japanese Nuclear Incident: Technical Aspects

Description: Japan’s nuclear incident has engendered much public and congressional concern about the possible impact of radiation on the Japanese public, as well as possible fallout on U.S. citizens. This report provides information on technical aspects of the nuclear incident, with reference to human health.
Date: March 29, 2011
Creator: Medalia, Jonathan
Partner: UNT Libraries Government Documents Department

Markov Model of Accident Progression at Fukushima Daiichi

Description: On March 11, 2011, a magnitude 9.0 earthquake followed by a tsunami caused loss of offsite power and disabled the emergency diesel generators, leading to a prolonged station blackout at the Fukushima Daiichi site. After successful reactor trip for all operating reactors, the inability to remove decay heat over an extended period led to boil-off of the water inventory and fuel uncovery in Units 1-3. A significant amount of metal-water reaction occurred, as evidenced by the quantities of hydrogen generated that led to hydrogen explosions in the auxiliary buildings of the Units 1 & 3, and in the de-fuelled Unit 4. Although it was assumed that extensive fuel damage, including fuel melting, slumping, and relocation was likely to have occurred in the core of the affected reactors, the status of the fuel, vessel, and drywell was uncertain. To understand the possible evolution of the accident conditions at Fukushima Daiichi, a Markov model of the likely state of one of the reactors was constructed and executed under different assumptions regarding system performance and reliability. The Markov approach was selected for several reasons: It is a probabilistic model that provides flexibility in scenario construction and incorporates time dependence of different model states. It also readily allows for sensitivity and uncertainty analyses of different failure and repair rates of cooling systems. While the analysis was motivated by a need to gain insight on the course of events for the damaged units at Fukushima Daiichi, the work reported here provides a more general analytical basis for studying and evaluating severe accident evolution over extended periods of time. This work was performed at the request of the U.S. Department of Energy to explore 'what-if' scenarios in the immediate aftermath of the accidents.
Date: November 11, 2012
Creator: A., Cuadra; R., Bari; Cheng, L-Y; Ginsberg, T.; Lehner, J.; Martinez-Guridi, G. et al.
Partner: UNT Libraries Government Documents Department

Markov Model of Severe Accident Progression and Management

Description: The earthquake and tsunami that hit the nuclear power plants at the Fukushima Daiichi site in March 2011 led to extensive fuel damage, including possible fuel melting, slumping, and relocation at the affected reactors. A so-called feed-and-bleed mode of reactor cooling was initially established to remove decay heat. The plan was to eventually switch over to a recirculation cooling system. Failure of feed and bleed was a possibility during the interim period. Furthermore, even if recirculation was established, there was a possibility of its subsequent failure. Decay heat has to be sufficiently removed to prevent further core degradation. To understand the possible evolution of the accident conditions and to have a tool for potential future hypothetical evaluations of accidents at other nuclear facilities, a Markov model of the state of the reactors was constructed in the immediate aftermath of the accident and was executed under different assumptions of potential future challenges. This work was performed at the request of the U.S. Department of Energy to explore 'what-if' scenarios in the immediate aftermath of the accident. The work began in mid-March and continued until mid-May 2011. The analysis had the following goals: (1) To provide an overall framework for describing possible future states of the damaged reactors; (2) To permit an impact analysis of 'what-if' scenarios that could lead to more severe outcomes; (3) To determine approximate probabilities of alternative end-states under various assumptions about failure and repair times of cooling systems; (4) To infer the reliability requirements of closed loop cooling systems needed to achieve stable core end-states and (5) To establish the importance for the results of the various cooling system and physical phenomenological parameters via sensitivity calculations.
Date: June 25, 2012
Creator: Bari, R.A.; Cheng, L.; Cuadra,A.; Ginsberg,T.; Lehner,J.; Martinez-Guridi,G. et al.
Partner: UNT Libraries Government Documents Department

Effects of Radiation from Fukushima Dai-ichi on the U.S. Marine Environment

Description: The massive Tohoku earthquake and tsunami of March 11, 2011, caused extensive damage in northeastern Japan, including damage to the Fukushima Dai-ichi nuclear power installation, which resulted in the release of radiation. Concerns arose about the potential effects of this released radiation on the U.S. marine environment and resources.
Date: April 2, 2012
Creator: Buck, Eugene H. & Upton, Harold F.
Partner: UNT Libraries Government Documents Department

Effects of Radiation from Fukushima Daiichi on the U.S. Marine Environment

Description: The massive Tohoku earthquake and tsunami of March 11, 2011, caused extensive damage in northeastern Japan, including damage to the Fukushima Dai-ichi nuclear power installation, which resulted in the release of radiation. This report discusses concerns about the potential effects of this released radiation on the U.S. marine environment and resources.
Date: April 5, 2011
Creator: Buck, Eugene H.; Upton, Harold F. & Folger, Peter
Partner: UNT Libraries Government Documents Department

Effects of Radiation from Fukushima Daiichi on the U.S. Marine Environment

Description: The massive Tohoku earthquake and tsunami of March 11, 2011, caused extensive damage in northeastern Japan, including damage to the Fukushima Dai-ichi nuclear power installation, which resulted in the release of radiation. This report discusses concerns which have arisen about the potential effects of this released radiation on the U.S. marine environment and resources.
Date: April 15, 2011
Creator: Buck, Eugene H. & Upton, Harold F.
Partner: UNT Libraries Government Documents Department

The Japanese Nuclear Incident: Technical Aspects

Description: This report presents scientific and technical aspects of human health issues related to the damage to the Fukushima Daiichi Nuclear Power Plant (NPP) caused by the Japanese earthquake and tsunami of March 2011. It includes an appendix of useful links.
Date: April 5, 2011
Creator: Medalia, Jonathan
Partner: UNT Libraries Government Documents Department

Japan’s 2011 Earthquake and Tsunami: Economic Effects and Implications for the United States

Description: This report presents data regarding the persons killed, missing, and buildings totally or partially damaged after the disaster in Japan. The report discusses the economic impact the disaster had on Japan and the impact on U.S. imports from and exports to Japan.
Date: March 25, 2011
Creator: Nanto, Dick K.; Cooper, William H. & Donnelly, J. Michael
Partner: UNT Libraries Government Documents Department

Japan’s 2011 Earthquake and Tsunami: Economic Effects and Implications for the United States

Description: This report presents data regarding the persons killed, missing, and buildings totally or partially damaged after the disaster in Japan. The report discusses the economic impact the disaster had on Japan and the impact on U.S. imports from and exports to Japan.
Date: April 6, 2011
Creator: Nanto, Dick K.; Cooper, William H.; Donnelly, J. Michael & Johnson, Renee
Partner: UNT Libraries Government Documents Department

Japan's 2011 Earthquake and Tsunami: Economic Effects and Implications for the United States

Description: This report presents data regarding the persons killed, missing, and buildings totally or partially damaged after the disaster in Japan. The report discusses the economic impact the disaster had on Japan and the impact on U.S. imports from and exports to Japan.
Date: April 20, 2011
Creator: Nanto, Dick K.; Cooper, William H.; Donnelly, J. Michael & Johnson, Renée
Partner: UNT Libraries Government Documents Department