Diagnosis and repair of wear in the Plum Brook Reactor core grid
Precision machining and repair of radioactive Plum Brook Reactor core fuel grid
Westhoven, R. C.↗
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Results for “repair”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Self-testing and repairing computer Patent
Self testing and repairing computer comprising control and diagnostic unit and rollback points for error correction
Avizienis, A. A.↗
Practical field repair of fused slurry silicide coating for space shuttle t.p.s.
Study of short-time high-temperature diffusion treatments as part of a program of development of methods of reapplying fused slurry silicide coating in the field. The metallographic structure and oxidation behavior of R512E applied to Cb-752 coated under simulated field repair conditions was determined. Oxidation testing in reduced pressure environment has shown that performance equivalent to furnace-processed specimens can be obtained in a two-minute diffusion at 2700 F.
Reznik, B. D.↗
Metal fatigue damage - Mechanism, detection, avoidance, and repair.
Collection of theoretical and experimental studies covering basic mechanisms of fatigue in the subcreep and creep ranges, fatigue damage detection, field practices for fatigue damage repair in jet engine components, and fatigue damage avoidance and control. Individual items are abstracted in this issue.
Manson, S. S.↗
A spacecraft computer repairable via command.
The MULTIPAC is a central data system developed for deep-space probes with the distinctive feature that it may be repaired during flight via command and telemetry links by reprogramming around the failed unit. The computer organization uses pools of identical modules which the program organizes into one or more computers called processors. The interaction of these modules is dynamically controlled by the program rather than hardware. In the event of a failure, new programs are entered which reorganize the central data system with a somewhat reduced total processing capability aboard the spacecraft. Emphasis is placed on the evolution of the system architecture and the final overall system design rather than the specific logic design.
Fimmel, R. O.↗
Concerns of the Institute of Transport Study and Research for reducing the sound level inside completely repaired buses
Sound level measurements on noise sources on buses are used to observe the effects of attenuating acoustic pressure levels inside the bus by sound-proofing during complete repair. A spectral analysis of the sound level as a function of motor speed, bus speed along the road, and the category of the road is reported.
Groza, A.↗
Repair of damaged insulation tiles
High-temperature, reusable surface insulation tiles are repaired quickly and economically using prefabricated tile plugs.
Mui, D.↗
A leading edge heating array and a flat surface heating array - operation, maintenance and repair manual
A general description of the leading edge/flat surface heating array is presented along with its components, assembly instructions, installation instructions, operation procedures, maintenance instructions, repair procedures, schematics, spare parts lists, engineering drawings of the array, and functional acceptance test log sheets. The proper replacement of components, correct torque values, step-by-step maintenance instructions, and pretest checkouts are described.
Source record↗
Frozen-fluid line repair
Improved line-freezing equipment permits fluid line repairs in previously inaccessible areas.
Stein, J. A.↗
Repairing silicon carbide coatings
Simple technique uses commercial binder, containing commercially available blended powder mixture for repairing silicon carbide coatings.
Shuford, D. M.↗
Nine percent nickel steel heavy forging weld repair study
The feasibility of making weld repairs on heavy section 9% nickel steel forgings such as those being manufactured for the National Transonic Facility fan disk and fan drive shaft components was evaluated. Results indicate that 9% nickel steel in heavy forgings has very good weldability characteristics for the particular weld rod and weld procedures used. A comparison of data for known similar work is included.
Young, C. P., Jr.↗
A Closed Network Queue Model of Underground Coal Mining Production, Failure, and Repair
Underground coal mining system production, failures, and repair cycles were mathematically modeled as a closed network of two queues in series. The model was designed to better understand the technological constraints on availability of current underground mining systems, and to develop guidelines for estimating the availability of advanced mining systems and their associated needs for spares as well as production and maintenance personnel. It was found that: mine performance is theoretically limited by the maintainability ratio, significant gains in availability appear possible by means of small improvements in the time between failures the number of crews and sections should be properly balanced for any given maintainability ratio, and main haulage systems closest to the mine mouth require the most attention to reliability.
Lohman, G. M.↗
Repairing cracked glass
Filing procedure consisting of machined lightweight fused-silica tiles coated with thin-layer of borosilicate glass produces homogeneous seal in thin glass. Procedure is useful in repairing glass envelopes, X-ray tub windows, Dewar flasks, and similar thin glass objects.
Helman, D. D.↗
Repairing ceramic insulating tiles
Fused-silica tiles containing large voids or gauges are repaired without adhesives by plug insertion method. Tiles are useful in conduits for high-temperature gases, in furnaces, and in other applications involving heat insulation.
Dunn, B. R.↗
Repairing flat cables
Simple procedure avoids costly repairs. Cable insulation flaps are cut and peeled back to expose conductor fractures. Insulation layers of decreasing size allow cable to flex without overstressing mended connectors.
Source record↗
Contamination Control During Weld Repairs
Using internal pressure, weld defects in pipes or tanks are repaired without contaminating interiors that cannot be protected or recleaned. Procedure can be used with pipes or tubing that is attached to components with critical internal clearances. Method has also been successfully used to cut completely through a pipe with a handsaw.
Cassidenti, M. L.↗
Investigation of a method for repairing the hot gas system branch 2 of the Symphonie-Satellite MV2 in orbit
The failure of all engines on the Symphonie MV2 satellite is attributed to blockage of the oxidizer branch caused by metal salts precipitating and forming a gel which constricts the narrow passage. Laboratory tests and other simulations conducted to observe the behavior of artificially produced jellies on a vacuum show that a removal or at least a reduction of the blockage in the oxidizer branch is possible by evacuation. The greatest blockage appears to occur in the filter. This fact restricts the capability to perform repairs in orbit because the filter installed ahead of the valve cannot by subjected to a vacuum.
Braun, H.↗
Repairing Voids and Delaminations in Composite Materials
Proposed tool forces adhesive into cracks. After inlet and outlet holes have been drilled to proper depth, alinement pin is inserted in inlet hole. Adhesive fills void or is forced into delamination, expanding delamination slightly to ensure full penetration. Potential applications in repair of fiber-reinforced components, boats, storage tanks, and some automobile bodies.
Ott, D. D.↗