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Decommissioning & Environmental Sciences
The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
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2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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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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Nuclear new build procurement considerations
It may seem counterintuitive, but the best time to enhance the ability to support operations and maintenance for a new plant is before construction starts. This is one of many lessons learned by the currently operating nuclear fleet. As construction and startup of many nuclear facilities was completed, it quickly became evident that the ability to efficiently support operations and maintenance was limited. Most of the information necessary to establish and manage procurement of spare and replacement items, maintenance, and configuration of the facilities was unavailable and had to be gathered on a case-by-case, “on-demand” basis. Absence of necessary information and the associated challenges resulted in the need for staff augmentation and multiyear-long projects to develop equipment bills of material and maintenance programs and to perform technical evaluations for the huge quantities of spare and replacement items being requested.
W. Scherer, V. Drüke, H. Gerwin, W. Presser
Nuclear Science and Engineering | Volume 97 | Number 2 | October 1987 | Pages 96-103
Technical Paper | doi.org/10.13182/NSE87-A27458
Articles are hosted by Taylor and Francis Online.
During the startup phase of the thorium high-temperature reactor (THTR)-300, control rod reactivity measurements are performed to meet the demands of the licensing authorities as well as to adjust the operating instrumentation. From several possibilities the inverse kinetic method has been chosen because of its easy implementation, high stability against disturbing signals, and great accuracy. An outline of the basic assumptions of various methods together with tests on the Kritische Anlage Hochtemperaturreaktor are discussed, the technical equipment for the THTR is described, and results of measurements for various rod configurations are given. Finally, the transition from the special startup equipment to the standard operating instrumentation is demonstrated.
