Search Results

An integral space power concept provides both the electrical power and propulsion from a common heat source and offers superior performance capabilities over conventional orbital insertion using chemical propulsion systems. This paper describes a hybrid (bimodal) system concept based on a proven, inherently safe solid fuel form for the high temperature reactor core operation and rugged planar thermionic energy converter for long-life steady state electric power production combined with NERVA-based rocket technology for propulsion. The integral system is capable of long-life power operation and multiple propulsion operations. At an optimal thrust level, the integral system can maintain the minimal delta-V requirement while minimizing the orbital transfer time. A trade study comparing the overall benefits in placing large payloads to GEO with the nuclear electric propulsion option shows superiority of nuclear thermal propulsion.

Quality improvement has been an objective of many manufacturing operations. As the quality improvement thrust has made its way across America plants have attempted to improve quality through the use of SPC. While numerous operations believed that this was “the solution” to cure manufacturing problems, experience has shown that it is just a tool. Honest attempts to make SPC a success have forced a revaluation of the tool in light of management philosophy and worker involvement. The Process Control System (PCS) is a series of steps that has been learned in the school of hard knocks. It is considered to be the most efficient method of implementing true process control. The process goes far beyond the typical SPC training to Include setting the stage for the training, as well as a technical analysis of the factors and management culture that effect long term implementation.