Category Archives: A. Worrall

Olefins via methanol production

Olefins are made from a light olefin (ethylene and propylene). They are the backbone of the petrochemical market and are consumed in the production of plastics. The conventional process uses coal to make syngas that is converted into methanol. The methanol is used in the olefin synthesis process to create ethylene and propylene with a variety of natural gas components. […]

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Very high temperature reactor (VHTR) system

The Korean government set up a long-term plan for the hydrogen economy in 2005 corresponding to the rapid climate changes and heavy reliance on the imported fossil fuel. Korea launched a nuclear hydrogen project utilizing very high temperature reactors (VHTRs) in 2004. The preliminary studies in 2004 and 2005 have identified the key technological areas. Based on the studies, VHTR […]

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Major components of an I&C system

The major components in an I&C system include the primary or sensing element, the transmitter, the processing electronics, and the actuation devices. The primary/sensing element is the device that senses the process. For example, a sensing element may be the temperature sensing device, or the pressure sensing device. The transmitter is the device that converts the physical parameter being sensed […]

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Dimension 2: technology characteristics

Technology characteristics can be grouped into two main categories — technical characteristics and context of use. 7.6.2.1 Technical characteristics These are concerned mainly with the advantages and disadvantages of specific technologies and the human factors considerations. These would include the performance criteria listed below. Most advantages and disadvantages of technology can be evaluated objectively simply by comparing features and performance […]

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B&W 1ST facility

The B&W mPower IST facility located in Bedford County, Virginia, USA, includes a scaled prototype of the B&W mPower reactor. All of the technical features of the B&W mPower integral reactor are included in the IST. The multi-year testing will collect data to verify the reactor design and safety performance and support B&W’s licensing activities with the NRC. The reactor […]

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Construction cost estimation

To evaluate the construction costs that, as said, represent the main component of nuclear LCOE, two approaches are usually adopted: top-down cost estimation and bottom-up cost estimation. • Top-down estimation. The cost is calculated starting from a reference, known cost value, then considering the most important cost drivers that characterize the economics of that specific technology to derive scaled or […]

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International certification of SMRs

At the 6th INPRO Dialogue Forum, the IAEA recommended consideration of international certification of SMRs. This long-term recommendation must recognize and integrate with the preservation of sovereign authority for licensing. The aviation industry is recognized as a credible model for international certification of airplanes. It may be a difficult task for the international nuclear community to develop a similar certification […]

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Benefits of ALM

The ALM process can provide a number of advantages, both business and technical, over traditional manufacturing methods. The justification for considering ALM arises from the volume of the market. For a small reactor with product lifespans of 40 to 60 years it is clear that no single supply chain can support the surge of production volumes at product launch and […]

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System security

System security refers to vulnerability to physical and cyber attacks, including vulnerability of both the installed facility and the supply chain (equipment feedstock). An integrated energy system based on domestically secure natural resources would be preferred over one having external dependencies due to the associated risk factors.

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