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Showing 1 to 20 of 20 for “"Steam generators"”.
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Computational Fluid Dynamics Modeling of Compact Steam Generators
Compact Steam Generators (CSGs) are vital components in Small Modular Reactors (SMRs), particularly within Integral Pressurized Water Reactor (iPWR) configurations where compactness and high performance are essential. This thesis explores the use of Multiphase Computational Fluid Dynamics (M-CFD) …
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A comparison of forced and natural circulation steam generators.
… forced circulation represents a step forward in steam generation similar to that of the watertube over the firetube boiler.
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Leak detection in power plant heat recovery steam generators utilizing medical radionuclides
… this places increased stress on thick walled steam turbine and boiler components, leading to steam leaks and premature failure. Established methods by which these leaks are detected rely on pressure drop testing: for power plants operating in today’s fast response market conditions a pressure …
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Dynamic modeling of vertical U-tube steam generators for operational safety systems
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1982.
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A probabilistic fracture mechanics model for the tubing degradation of the Koeberg steam generators
The susceptibility of Steam Generator (SG) Tubes (particularly tubes manufactured from Inconel 600) to primary water stress corrosion cracking (PWSCC) has been a major concern to the nuclear industry since 1971, when this phenomenon was first observed outside the laboratory. Since the …
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Long-Term Cooling of an SBLOCA: Boron Precipitation in the Core, Boron Dilution in the Steam Generators
… to boil. As boron is less volatile than steam, the steam is virtually boron free. All the boron remains in the core, the boron concentration in the core rises. If the solubility limit is reached, precipitation could occur. The boron precipitation event was historically considered to be …
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Boiling heat transfer characteristics of steam generator U-tube fouling
The boiling heat transfer characteristics of steam generator u-tube fouling deposits were identified by developing a boiling heat transfer model and determining its accuracy through the comparison of calculated and experimental results. Magnetite deposits were fabricated in the laboratory and were …
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Assessment of a compact steam generator aided by computational fluid dynamics
Steam generators are an essential component in nuclear power plants which serve to transfer thermal power from a liquid coolant to steam by boiling water. Even with many advancements in the designs of steam generators, they still require extremely large sizes and have high costs which are major …
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Dynamic modeling and simulation of a nuclear power plant
… The subsystems that are modeled are the reactor, steam generators, pressurizer, boron addition system, feedwater system, steam lines, and turbine. The objective of this work is to develop models that will adequately predict the transient performance of the plant for large power excursions. …
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Effect of Porosity on the Creep Rupture Behavior of Low Alloy Steel Weldments.
… of nuclear and petro-chemical reactor vessels, steam generators, piping, valves, etc. in which the operating conditions are high temperatures, high pressures and large cross-sections.Porosity is the most common cause for weld rejection in all welded materials. The resulting loss of productivity …
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Safety analysis of a compact integral small light water reactor
… whose key features include the use of Compact Steam Generators and a large water tank in which the containment submerges for passive heat removal.
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The design of a compact integral medium size PWR : the CIRIS
… means the reactor vessel contains all pumps, steam generators, pressurizer and control rod drive mechanisms. This work assesses possible improvements of the plant economics by the allowable power in the IRIS vessel, while maintaining the same or better safety limits, through increasing the …
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A comparison of high temperature fuel cells and gas turbines for expansion of the MIT Cogeneration Plant
… is quickly outstripping its ability to produce steam and electricity. At the moment, MIT's campus peak demand is 31 MW of electricity and 372,282 lbs/hr of steam' yet the MIT cogeneration plant only produces 21 MW of power and 230,000 lbs/hr of firm steam production2. In addition to this desire …
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Conceptual design of a lead-bismuth cooled fast reactor with in-vessel direct-contact steam generation
… cooled fast reactor that eliminates the need for steam generators and coolant pumps was explored. The working steam is generated by direct contact vaporization of water and liquid metal in the chimney above the core and then is sent to the turbine. The presence of a lighter fluid in the chimney …
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Multiphysics modeling of activity transport and evolution of CRUD and steam generator oxides in pressurized water reactors
… products on ex-core structures, such as steam generators and piping, can cause increased radiation fields and higher dose exposures for plant workers. To better understand the mechanisms of corrosion product activity transport and evolution in the primary coolant loop, a crud source term …
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Heat-transfer analysis of double-pipe heat exchangers for indirect-cycle SCW NPP
… option for PT and PV SCWRs without introducing steam-reheat channels into a reactor. Similar to the current CANDU and Pressurized Water Reactor (PWR) NPPs, steam generators separate the primary loop from the secondary loop. In this way, the primary loop can be completely enclosed in a reactor …
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Numerical investigation of the fluidelastic instability of two-phase flow in a parallel triangular tube array
Steam generators are always susceptible to vibrations induced by the flow in either the shell or tube sides. The fluidelastic instability phenomenon (FEI) is considered one of the most devastating flow excitations since it may cause excessive wear and structural failure to the tubes in a short time …
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Treatment of Oil-Sands Produced Water by Electrocoagulation
… which is the cause of the scaling problem in the steam generators in the oil-sands production process. Electrocoagulation is found to be very efficient to remove dissolved Si from approximately 60 mg/L to less than 5 mg/L, corresponding to greater than 90% Si removal. In addition, removal of 90% …
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Development of a dynamic modelling of biomass boilers using flownex
… a large group of industries requiring process steam in their production processes. The shift towards renewable energy sources is extended to industrial scale steam generators, whose designs need to allow flexibility in firing renewable and carbon neutral fuel sources such as biomass. The …
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Long-term reactivity transient analysis in an extended loss of all AC power at the Koeberg nuclear plant
… providing adequate secondary side feed-water and steam-evacuation capability from the steam generators, and maintaining an adequate volume of borated water in the primary system, to prevent overheating of the reactor core. However, in the ELAP scenario, a long-term reactivity concern develops as …