Digital fieldbus technologies, including Foundation fieldbus and Profibus, are increasingly being used with success in the nuclear and fossil fuel power industries. This article compares a conventional control system with a Foundation fieldbus – based digital control system used in a typical circulating water system in a nuclear power plant. As shown in this example, using digital fieldbus technologies can result in significant savings in terms of installation and hardware costs.
In order to operate aging nuclear power plant instrumentation and control systems for up to 60 more years or longer, there must be a smooth transition from existing analog technologies to advanced digital platforms. For this to occur, electromagnetic compatibility concerns related to both qualification testing and the electromagnetic environment must be addressed to ensure safe and reliable operation of these systems within the plant’s electromagnetic and radio frequency interference environment. By understanding the regulatory requirements and sharing implementation experience, digital system upgrades can be installed successfully.
Researchers from the Idaho National Laboratory (INL) say they have developed a new type of nuclear fuel for use in next-generation high-temperature gas reactors that produces less waste — a major step forward for the Next Generation Nuclear Plant (NGNP).
Japan began operating a nuclear power reactor using plutonium-uranium mixed oxide (MOX) as fuel for the first time last October. About 16 MOX-containing fuel assemblies were loaded during a scheduled outage to replace a portion of the 193 fuel assemblies at the No. 3 reactor at Kyushu Electric Power Co.’s Genkai nuclear power plant. The utility eventually plans to triple the number of fuel assemblies at the 1,180-MW reactor in Saga Prefecture to 48. The Ministry of Economy, Trade and Industry conducted its final inspection of the reactor and issued its certification on Dec. 2.
The European carbon trading system experience suggests that North American generators should expect severely altered coal-fired power plant operating profiles if cap-and-trade legislation becomes law. In a groundbreaking study, Solomon Associates predicts the reduction in mean run time that North American generators should expect. The trends outlined in this study provide an overview of some of the broad challenges facing generators in moving to a carbon-constrained market environment.
Concerns raised by the U.S. Nuclear Regulatory Commission (NRC) about the structural strength of Westinghouse Electric Co.’s AP1000 reactor could cause delays for several nuclear plants that planned to use the design in the U.S. — and it raises questions for new builds started or proposed in China and the UK.
Corrosion of steel water pipes in the safety-related piping systems of aging U.S. nuclear power plants is fast becoming a safety concern and a significant operational cost, not to mention an indication of potential future liability for nuclear utilities currently constructing new plants or retrofitting existing sites.
While the global spotlight is fixed on India’s massive coal-fired power capacity expansion, the country with meager uranium reserves has been pressing on with a unique long-term program that pushes for research and development of nuclear reactors using all three main fissionable materials.
Recent Nuclear Regulatory Commission (NRC) Component Design Bases Inspection activities have scrutinized empirical approaches used to determine vortex allowances for emergency core cooling system (ECCS) suction sources.
Olkiluoto 3, the world’s first EPR whose construction in Finland has been plagued by major delays, in September reached a significant milestone as its 200 – metric ton, 47-meter-diameter steel dome was hoisted into position 44 meters above the ground.