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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.
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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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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Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
Xianping Zhong, Jiyang Yu, Xiaolong Zhang, Muhammad Saeed, Yi Li, Zhihui Chen, Bin Tang, Yan Sun, Tao Huang
Nuclear Technology | Volume 207 | Number 2 | February 2021 | Pages 228-246
Technical Paper | doi.org/10.1080/00295450.2020.1763097
Articles are hosted by Taylor and Francis Online.
The pressurizer of a pressurized water reactor (PWR), as a spray-heating degasser, has been widely used to remove dissolved gas in the primary coolant of PWRs. In the real degassing process, the boundary conditions of the pressurizer may change, causing fluctuations in the degassing state and affecting the efficiency of degassing. However, open-published studies have focused mainly on the steady-state degassing characteristics of the pressurizer. This paper studies the dynamic characteristics of a spray-heating degasser as applied to the pressurizer of a PWR. First, a lumped parameter dynamic degassing model for the spray-heating degasser is proposed based on basic gas dissolution and transport theory. Second, this model is extended, and a dynamic degassing model for the pressurizer is obtained. Third, two sets of numerical hydrogen degassing tests are carried out using the pressurizer dynamic degassing model. These two sets of numerical tests take the Shippingport pressurizer as the research object and integrate the structure and operating parameters of the Shippingport pressurizer with the system parameters of a Bettis Atomic Power Laboratory hydrogen degassing test as the numerical test condition.
The spray-heating degasser degassing model is universal and applicable to this pressurizer as well as other devices with similar structures. The first set of numerical tests carried out reveals the physical mechanism of degassing with the spray-heating degasser. The pressurizer degassing model can be used for transient degassing analysis, and it also provides a basis for the subsequent design of the control system of pressurizer degassing.