Showing papers on "Ullage published in 1982"
Patent•
27 Sep 1982
TL;DR: In this article, a multi-element bottle to receive irradiated nuclear fuel is housed within a flask for transport and both the bottle and flask contain water, and additional ullage space is provided by a closed chamber (10) at one end of the bottle, the chamber being closed by a wall (11) which can collapse or rupture when the pressure exterior thereof exceeds a predetermined value.
Abstract: A container, termed a multi-element bottle, to receive irradiated nuclear fuel is housed within a flask for transport and both the bottle and flask contain water. Ullage space within the fuel chamber in the bottle and flask allow for thermal expansion under normal conditions. Additional ullage is provided as a safety measure in accident conditions involving fire and resulting rise in temperature with consequent increase in pressure within the bottle and the flask. The additional ullage space is provided by a closed chamber (10) at one end of the bottle, the chamber (10) being closed by a wall (11) which can collapse or rupture when the pressure exterior thereof exceeds a predetermined value. The normal ullage space within the fuel chamber (7) in the bottle can be increased by providing a further chamber (20) within the bottle between the fuel chamber (7) and the closed end chamber (10) having the collapsible wall with means (25) providing communication between the fuel chamber and the further chamber.
7 citations
01 Jan 1982
TL;DR: In this paper, the main cryogen tank is sized to hold 70 kg of superfluid helium with 12 percent ullage at a temperature of 1.8 K. The insulation system surrounds the main shell with four blankets of multilayer insulation spaced by means of three vapor-cooled shields.
Abstract: The main cryogen tank is sized to hold 70 kg of superfluid helium with 12 percent ullage at a temperature of 1.8 K. The insulation system surrounds the main cryogen tank with four blankets of multilayer insulation spaced by means of three vapor-cooled shields. It is noted that the multilayer insulation is 6.4 micron double-aluminized Mylar separated by polyester net. The main shell provides the primary structural integrity of the system. In orbit the main shell is cooled to 170 K using insulation blankets on one side and second surface paint on the opposite side. The aperture cover subassembly is the vacuum seal for the main shell during operation on the ground. It is also a gas condensation trap before and during cooldown of the main cryogen tank during launch hold. It contains 6 kg of supercritical helium, which permits 14 days on orbit with a 48-hour launch pad hold.
3 citations
Patent•
12 Jan 1982
TL;DR: A dipstick, or ullage rod, is a rod for measuring the fluid level in a fluid reservoir, such as, the oil level in the crankcase of a combustion engine, wherein the reservoir has a complex shaped access tube as discussed by the authors.
Abstract: A dipstick, or ullage rod, for measuring the fluid level in a fluid reservoir, such as, the oil level in the crankcase of a combustion engine, wherein the reservoir has a complex shaped access tube, the dipstick including a handle portion and an elongated, flat wire blade portion including at least one twisted portion of relatively gradual and continuous angular variation for increasing the flexibility of the blade portion to facilitate passage thereof into the complex shaped access tube.
1 citations
Patent•
20 Sep 1982
TL;DR: In this paper, a multi-element bottle to receive irradiated nuclear fuel is housed within a flask for transport and both the bottle and flask contain water, and additional ullage space is provided by a closed chamber (10) at one end of the bottle, the chamber being closed by a wall (11) which can collapse or rupture when the pressure exterior thereof exceeds a predetermined value.
Abstract: A container, termed a multi-element bottle, to receive irradiated nuclear fuel is housed within a flask for transport and both the bottle and flask contain water. Ullage space within the fuel chamber in the bottle and flask allow for thermal expansion under normal conditions. Additional ullage is provided as a safety measure in accident conditions involving fire and resulting rise in temperature with consequent increase in pressure within the bottle and the flask. The additional ullage space is provided by a closed chamber (10) at one end of the bottle, the chamber (10) being closed by a wall (11) which can collapse or rupture when the pressure exterior thereof exceeds a predetermined value. The normal ullage space within the fuel chamber (7) in the bottle can be increased by providing a further chamber (20) within the bottle between the fuel chamber (7) and the closed end chamber (10) having the collapsible wall with means (25) providing communication between the fuel chamber and the further chamber.
1 citations
01 Oct 1982
TL;DR: In this article, a molecular sieve pressure swing adsorption technology was used to generate inert (nitrogen-rich) gas for fuel tank inerting protection for large fixed wing aircraft.
Abstract: : The elimination of fire and explosion hazards in aircraft fuel tanks has been investigated. DOD and FAA tests have shown that a reduction of the oxygen concentration in the ullage gas to under 12 percent will prevent rapid propagation of the flame front and subsequent overpressure explosion. One means of providing the required reduction in oxygen concentration is to provide a source of inert (nitrogen-rich) gas which would replace fuel used, and flush out atmospheric oxygen and dissolved oxygen which may be released from the fuel. Molecular sieve pressure swing adsorption technology could be used to generate inert (nitrogen-rich) gas. A Molecular Sieve Inert Gas Generator (MSIGG) was designed, fabricated, and delivered to the U.S. Air Force, Wright-Patterson Air Force Base, Ohio where it will undergo extensive laboratory testing to establish the feasibility of using the molecular sieve pressure swing adsorption technology to provide fuel tank inerting protection for large fixed wing aircraft. In preliminary testing prior to delivery the developed system met performance goals and predictions. (Author)
1 citations