ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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Division Spotlight
Robotics & Remote Systems
The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Nuclear Technology
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Latest News
Virginia utility considers SMRs
Dominion Energy Virginia has issued a request for proposals from leading nuclear companies to study the feasibility of putting a small modular reactor at its North Anna nuclear power plant.
While the utility says it is not a commitment to build an SMR at the site, the RFP is “an important first step in evaluating the technology and the North Anna site to support Dominion Energy customers’ future energy needs consistent with the company’s most recent Integrated Resource Plan.”
Mark A. Chaiko, Michael J. Murphy
Nuclear Technology | Volume 94 | Number 1 | April 1991 | Pages 44-55
Technical Paper | Nuclear Reactor Safety | doi.org/10.13182/NT91-A16220
Articles are hosted by Taylor and Francis Online.
The Compartment Transient Temperature Analysis Program (COTTAP) was developed by the Pennsylvania Power & Light Company for postaccident boiling water reactor (BWR) secondary containment thermal analysis. The code makes use of previously developed implicit temporal integration methods and sparse matrix inversion techniques to allow modeling of an entire BWR secondary containment. Investigations were made with a model consisting of 121 compartments and 767 heat-conducting slabs. The simulation presented involves the numerical integration of 20 101 ordinary differential equations over a 30-h simulation period. Two hours of CPU time were required to carry out the calculation on an IBM 3090 computer. The COTTAP code considers natural convection and radiation heat transfer between compartment air and walls through a detailed finite difference solution of the slab conduction equations. Heat addition from hot piping and operating equipment, and cooling effects associated with ventilation flows and compartment heat removal units are also included. Additional capabilities of COTTAP include modeling of compartment heatup resulting from steamline breaks and simulation of natural circulation cooling in compartments with flow paths at differing elevations.