Abstract—The power system frequency falls when disturbance such as rapid increase of system load or loss of a generating unit occurs in power systems. Especially, increase in the number of renewable generating units has a bad influence on the power system because of loss of generating unit depending on the circumstance. Conventional technologies use frequency droop control battery output for th...

Data on the development of nuclear power units for use in spacecraft—nuclear rocket engines and units—are presented. Information creation a reactor unit transport module based megawatt-class propulsion system is provided. The research results are presented, including modeling neutron physics, heat transfer, gas dynamics; testing full-scale mock-ups main assemblies unit; conducting control physi...

1.0 BACKGROUND By letters dated March 13, 1998, and March 12, 1999, PECO Energy Company (the licensee) submitted a response to the U.S. Nuclear Regulatory Commission's (NRC's) Request for Additional Information (RAI) dated November 14, 1997, related to Generic Letter (GL) 92-08, "Thermo-Lag 330-1 Fire Barriers," for Peach Bottom Atomic Power Station (Peach Bottom), Units 2 and 3, and Limerick G...

In this paper, the performance of constrained Generalized Predictive Control (CGPC) is investigated on a comprehensive non-linear multivariable simulation of the Dinorwig pumped-storage hydroelectric power station. The responses of the system are compared with those of the classic PI controller, as currently implemented on the plant. The results show that CGPC offers significantly better perfor...

Because the scope of risk assessments at nuclear power plants (NPPs) is being extended both spatially and temporally, conventional, or static fault trees might not be able to express failure mechanisms, they could unnecessarily conservative in their expression. Therefore, realistic assessment techniques are needed adequately capture accident scenarios. In multi-unit probabilistic safety (PSA), ...

A recent Massachusetts Institute of Technology (MIT) study on the future of nuclear power argues that nuclear power should be maintained as an energy option because it is an important carbon-free source of power that can potentially make a significant contribution to future electricity supply.* Unfortunately, the study also observes, based on a survey of adults in the United States, that those ...

Arguably, the natural gas transmission pipeline infrastructure in Iran represents one of the largest and most complex mechanical systems in the world. The optimization of large gas trunk lines known as IGAT results in reduced fuel consumption or higher capability and improves pipeline operation. In the current study, a single-objective optimization was conducted for Khormoj compressor station o...

Deregulation process has created an intense competition with the participation of many generating companies (GENCOs) in a power market. Wholesale transactions (bids and offer) have to be cleared and settled in a shorter duration. Therefore, this necessitates for the system operator to quick and smarter decisions. In this problem formulation, profit based unit commitment (PBUC) problem aims in m...