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in subjects: "Rockets"

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Close-in Magnetic Fields of a Lightning Return Stroke

This report address a close-in magnetic fields of a lightning return stroke.

Date: June 1, 1975

Creator: Jones, R. D. & Watts, H. A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Modal survey and test-analysis correlation of a multiply-configured three-stage booster

This paper describes procedure used to produce a test-validated finite element model of a three-stage solid propellant booster system. A series of system-level modal tests were performed for several inert and live propellant configurations. Test-analysis models (TAMs) were used to provide pretest support of the live propellant system tests. Confidence in the model was established by a test-analysis correlation procedure. Optimization techniques were used to determine appropriate model updates. … more

Date: January 1, 1991

Creator: Marek, E. L.; Branstetter, L. J. & Freed, A. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A review of the Los Alamos effort in the development of nuclear rocket propulsion

This paper reviews the achievements of the Los Alamos nuclear rocket propulsion program and describes some specific reactor design and testing problems encountered during the development program along with the progress made in solving these problems. The relevance of these problems to a renewed nuclear thermal rocket development program for the Space Exploration Initiative (SEI) is discussed. 11 figs.

Date: January 1, 1991

Creator: Durham, F.P.; Kirk, W.L. & Bohl, R.J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

An Aerial Radiological Survey of the Yucca Mountain Project Proposed Land Withdrawal and Adjacent Areas

An aerial radiological survey of the Yucca Mountain Project (YMP) proposed land withdrawal was conducted from January to April 2006, and encompassed a total area of approximately 284 square miles (73,556 hectares). The aerial radiological survey was conducted to provide a sound technical basis and rigorous statistical approach for determining the potential presence of radiological contaminants in the Yucca Mountain proposed Land withdrawal area. The survey site included land areas currently man… more

Date: July 1, 2006

Creator: Craig Lyons, Thane Hendricks

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Verification Survey of the Building 315 Zero Power Reactor-6 Facility, Argonne National Laboratory-East, Argonne, Illinois

Oak Ridge Institute for Science and Education (ORISE) conducted independent verification radiological survey activities at Argonne National Laboratory’s Building 315, Zero Power Reactor-6 facility in Argonne, Illinois. Independent verification survey activities included document and data reviews, alpha plus beta and gamma surface scans, alpha and beta surface activity measurements, and instrumentation comparisons. An interim letter report and a draft report, documenting the verification survey … more

Date: May 25, 2007

Creator: Adams, W. C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Third millenium ideal gas and condensed phase thermochemical database for combustion (with update from active thermochemical tables).

The thermochemical database of species involved in combustion processes is and has been available for free use for over 25 years. It was first published in print in 1984, approximately 8 years after it was first assembled, and contained 215 species at the time. This is the 7th printed edition and most likely will be the last one in print in the present format, which involves substantial manual labor. The database currently contains more than 1300 species, specifically organic molecules and radi… more

Date: July 29, 2005

Creator: Burcat, A.; Ruscic, B.; Chemistry & Tech., Technion - Israel Inst. of

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Laser-fusion rocket for interplanetary propulsion

A rocket powered by fusion microexplosions is well suited for quick interplanetary travel. Fusion pellets are sequentially injected into a magnetic thrust chamber. There, focused energy from a fusion Driver is used to implode and ignite them. Upon exploding, the plasma debris expands into the surrounding magnetic field and is redirected by it, producing thrust. This paper discusses the desired features and operation of the fusion pellet, its Driver, and magnetic thrust chamber. A rocket design … more

Date: September 27, 1983

Creator: Hyde, R.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Effects of rocket exhaust products in the thermosphere and ionsphere

This paper reviews the current state of understanding of the problem of ionospheric F-layer depletions produced by chemical effects of the exhaust gases from large rockets, with particular emphasis on the Heavy Lift Launch Vehicles (HLLV) proposed for use in the construction of solar power satellites. The currently planned HLLV flight profile calls for main second-stage propulsion confined to altitudes below 124 km, and a brief orbit circularization maneuver at apogee. The second stage engines … more

Date: February 1, 1980

Creator: Zinn, J. & Sutherland, C. D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

SPS environmental effects on the upper atmosphere

The ionospheric effects and associated environmental impacts which may be produced during the construction and operation of a solar power satellite system are reviewed. Propellant emissions from heavy lift-launch vehicles are predicted to cause widespread ionospheric depletions in electron and ion densities. Collisional damping of the microwave power beam in the lower ionosphere can significantly enhance the local free electron temperatures. Thermal self-focusing of the power beam in the ionosp… more

Date: January 1, 1980

Creator: Duncan, L.M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Assessment of the advantages and feasibility of a nuclear rocket

The feasibility of rebuilding and testing a nuclear thermal rocket (NTR) for the Mars mission has been investigated. Calculations indicate that an NTR would substantially reduce the earth-orbit assembled mass compared to LOX/LH/sub 2/ systems. The mass savings were 36% and 65% for the cases of total aerobraking and of total propulsive braking respectively. Consequently, the cost savings for a single mission of using an NTR, if aerobraking is feasible, are probably insufficient to warrant the NT… more

Date: January 1, 1985

Creator: Howe, S.D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

An investigation of dual-mode operation of a nuclear-thermal rocket engine

A preliminary assessment of the technical feasibility and mass competitiveness of a dual-mode nuclear propulsion and power system based on Rover-type reactors has been completed. Earlier studies have indicated that dual-mode systems appear attractive for electrical power levels of a few kilowatts. However, at the megawatt electrical power level considered in this study, it appears that extensive modifications to the nuclear-thermal engines would be required, the feasibility of which is unclear.… more

Date: June 1, 1991

Creator: Kirk, W. L.; Hedstrom, J. C.; Moore, S. W.; McFarland, R. D.; Merrigan, M. A.; Buksa, J. J. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

An Overview of Current and Past W-UO[2] CERMET Fuel Fabrication Technology

Studies dating back to the late 1940s performed by a number of different organizations and laboratories have established the major advantages of Nuclear Thermal Propulsion (NTP) systems, particularly for manned missions. A number of NTP projects have been initiated since this time; none have had any sustained fuel development work that appreciably contributed to fuel fabrication or performance data from this era. As interest in these missions returns and previous space nuclear power researchers… more

Date: June 1, 2007

Creator: Burkes, Douglas E.; Wachs, Daniel M.; Werner, James E. & Howe, Steven D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Streamlined Approach for Environmental Restoration Plan for Corrective Action Unit 496: Buried Rocket Site, Antelope Lake, Tonopah Test Range

This Streamlined Approach for Environmental Restoration (SAFER) plan details the activities necessary to close Corrective Action Unit 496: Buried Rocket Site, Antelope Lake. CAU 496 consists of one site located at the Tonopah Test Range, Nevada.

Date: May 1, 2004

Creator: United States. National Nuclear Security Administration. Nevada Site Office.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Nuclear Rocket Facility Decommissioning Project: Controlled Explosive Demolition of Neutron-Activated Shield Wall

Located in Area 25 of the Nevada Test Site (NTS), the Test Cell A (TCA) Facility (Figure 1) was used in the early to mid-1960s for testing of nuclear rocket engines, as part of the Nuclear Rocket Development Program, to further space travel. Nuclear rocket testing resulted in the activation of materials around the reactors and the release of fission products and fuel particles. The TCA facility, known as Corrective Action Unit 115, was decontaminated and decommissioned (D&D) from December 2… more

Date: June 1, 2008

Creator: Kruzic, Michael R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Calendar Year 2004 annual site environmental report : Tonopah Test Range, Nevada & Kauai Test Facility, Hawaii.

Tonopah Test Range (TTR) in Nevada and Kauai Test Facility (KTF) in Hawaii are government-owned, contractor-operated facilities operated by Sandia Corporation, a subsidiary of Lockheed Martin Corporation. The U.S. Department of Energy (DOE), National Nuclear Security Administration (NNSA), through the Sandia Site Office (SSO), in Albuquerque, NM, manages TTR and KTF's operations. Sandia Corporation conducts operations at TTR in support of DOE/NNSA's Weapons Ordnance Program and has operated the… more

Date: September 1, 2005

Creator: Montoya, Amber L.; Wagner, Katrina; Goering, Teresa Lynn; Koss, Susan I. & Salinas, Stephanie A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Optical bullet-tracking algorithms for weapon localization in urban environments

Localization of the sources of small-arms fire, mortars, and rocket propelled grenades is an important problem in urban combat. Weapons of this type produce characteristic signatures, such as muzzle flashes, that are visible in the infrared. Indeed, several systems have been developed that exploit the infrared signature of muzzle flash to locate the positions of shooters. However, systems based on muzzle flash alone can have difficulty localizing weapons if the muzzle flash is obscured or suppr… more

Date: March 31, 2006

Creator: Roberts, R S & Breitfeller, E F

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A preliminary stage configuration for a low pressure nuclear thermal rocket (LPNTR)

A low pressure nuclear thermal rocket (LPNTR) is configured to meet the requirements of a nuclear stage for manned Mars exploration. Safety, reliability and performance are given equal consideration in selecting the stage configuration. Preliminary trade studies are conducted to size the engine thrust and determine the thrust chamber pressure. A weight breakdown and mechanical configuration for the selected LPNTR concept are defined. A seven engine stage configuration is selected which gives a … more

Date: January 1, 1990

Creator: Leyse, C. F.; Madsen, W. W.; Neuman, J. E.; Ramsthaler, J. H. & Schnitzler, B. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A Case for Mars: A Case for Nuclear Thermal Rockets

It is now possible to make general comparisons of candidate propulsion systems for human exploration of Mars. Preliminary review indicates that the propulsion system most likely to meet all mission requirements is the Nuclear Thermal Rocket (NTR). Advanced cryogenic chemical propulsion systems achieve a maximum specific impulse (Isp) of about 470 seconds. The Nuclear Engine for Rocket Vehicle Application (NERVA) program of the 1960's built engines with Isp's of about 825 seconds. Performance of… more

Date: January 1, 1990

Creator: Neuman, J. E.; Van Haaften, D. H. & Madsen, W. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Low-thrust rocket trajectories

The development of low-thrust propulsion systems to complement chemical propulsion systems will greatly enhance the evolution of future space programs. Two advantages of low-thrust rockets are stressed: first, in a strong gravitational field, such as occurs near the Earth, freighter missions with low-thrust engines require one-tenth as much propellant as do chemical engines. Second, in a weak gravitational field, such as occurs in the region between Venus and Mars, low-thrust rockets are faster… more

Date: March 1, 1987

Creator: Keaton, P.W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

F111 Crew Escape Module Pilot Parachute

A successfully deployment of a parachute system highly depends on the efficiency of the deployment device and/or method. There are several existing methods and devices that may be considered for a deployment system. For the F111 Crew Escape Module (CEM), the recovery parachute system deployment is initiated by the firing of a catapult that ejects the complete system from the CEM. At first motion of the pack, a drogue gun is fired, which deploys the pilot parachute system. The pilot parachute sy… more

Date: January 1, 1991

Creator: Tadios, E.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Assessment of a hot hydrogen nuclear propulsion fuel test facility

Subsequent to the announcement of the Space Exploration Initiative (SEI), several studies and review groups have identified nuclear thermal propulsion as a high priority technology for development. To achieve the goals of SEI to place man on Mars, a nuclear rocket will operate at near 2700K and in a hydrogen environment at near 60 atmospheres. Under these conditions, the operational lifetime of the rocket will be limited by the corrosion rate at the hydrogen/fuel interface. Consequently, the Lo… more

Date: January 1, 1991

Creator: Watanabe, H.H.; Howe, S.D. & Wantuck, P.J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Electron beam rocket pellet accelerator

Viewgraphs from the presentation are given. (MOW)

Date: January 1, 1985

Creator: Foster, C.A. & Menon, M.M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Aguila pre-operations plan

Aguila, a small-rocket experiment addressing the structuring of ionospheric plasmas, is described. A Terrier-Malemute two-stage rocket will be launched approximately north from Kauai Test Facility after sunset between October 8 and October 21, 1979, universal time. Aguila will deposit three barium clouds: before apogee at about 360 and 520 km, and just after apogee at 560 km. These clouds will be photoionized by the sun and observed using intensified-camera and television systems and photometer… more

Date: September 1, 1979

Creator: Simons, D.; Pongratz, M.; Duran, M. & Barasch, G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Enhancing atom densities in solid hydrogen by isotopic substitution

Atomic hydrogen inside solid H{sub 2} increases the energy density by 200 MegaJoules/m{sup 3}, for each percent mole fraction stored. How many atoms can be stored in solid hydrogen To answer this, we need to know: (1) how to produce and trap hydrogen atoms in solid hydrogen, (2) how to keep the atoms from recombining into the ground molecular state, and (3) how to measure the atom density in solid hydrogen. Each of these topics will be addressed in this paper. Hydrogen atoms can be trapped in s… more

Date: April 2, 1991

Creator: Collins, G. W.; Souers, P. C.; Mapoles, E. R. & Magnotta, F.

Item Type: Article

Partner: UNT Libraries Government Documents Department