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Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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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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Glass strategy: Hanford’s enhanced waste glass program
The mission of the Department of Energy’s Office of River Protection (ORP) is to complete the safe cleanup of waste resulting from decades of nuclear weapons development. One of the most technologically challenging responsibilities is the safe disposition of approximately 56 million gallons of radioactive waste historically stored in 177 tanks at the Hanford Site in Washington state.
ORP has a clear incentive to reduce the overall mission duration and cost. One pathway is to develop and deploy innovative technical solutions that can advance baseline flow sheets toward higher efficiency operations while reducing identified risks without compromising safety. Vitrification is the baseline process that will convert both high-level and low-level radioactive waste at Hanford into a stable glass waste form for long-term storage and disposal.
Although vitrification is a mature technology, there are key areas where technology can further reduce operational risks, advance baseline processes to maximize waste throughput, and provide the underpinning to enhance operational flexibility; all steps in reducing mission duration and cost.
Anh-Tuan Cao, Thanh-Tuan Tran, Thi-Hong-Xuyen Nguyen, Dookie Kim
Nuclear Technology | Volume 206 | Number 5 | May 2020 | Pages 743-757
Technical Paper | doi.org/10.1080/00295450.2019.1696643
Articles are hosted by Taylor and Francis Online.
This paper proposes a simplified approach for assessing and predicting the seismic risks for electrical cabinets in nuclear power plants (NPPs). The method is a combination of fragility analysis and cumulative absolute velocity (CAV) analysis. First, the high confidence of low probability of failure points from the fragility curves are defined to determine the capacity of the cabinet. Then, the potential damage to the electrical cabinet at different locations in Korea is considered via probabilistic seismic maps. Based on the capacity, a seismic risk assessment is conducted to observe the operant condition or predict the potential issues of the electrical cabinet under seismic effects.
An electrical cabinet is used as a setting for numerical simulation. The finite element model is validated against the experimental results and calibrated by using response surface methodology. Numerical results show that the operant condition of the electrical cabinet can be disturbed by probable earthquakes that have CAV values greater than the of 0.27 g‧s. This method is one way that NPP operators can follow to obtain cabinet safety regulations.