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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Hash Hashemian: Visionary leadership
As Dr. Hashem M. “Hash” Hashemian prepares to step into his term as President of the American Nuclear Society, he is clear that he wants to make the most of this unique moment.
A groundswell in public approval of nuclear is finding a home in growing governmental support that is backed by a tailwind of technological innovation. “Now is a good time to be in nuclear,” Hashemian said, as he explained the criticality of this moment and what he hoped to accomplish as president.
Ming Ding, Xiaoyong Yang, Jie Wang
Nuclear Technology | Volume 169 | Number 3 | March 2010 | Pages 205-217
Technical Paper | Fission Reactors | doi.org/10.13182/NT10-A9374
Articles are hosted by Taylor and Francis Online.
A recuperator is a key component and plays an important role in the high-temperature gas-cooled reactor combined with gas turbine (HTGR-GT) system. A distributed parameter model was proposed to study the dynamic characteristics of the recuperator of the HTGR-GT cycle, and this model was solved using an implicit arithmetic. Basic characteristics of the recuperator were analyzed using responses of the recuperator to step disturbances of temperature and mass flow. The response of the recuperator to the temperature disturbances has two different characteristic times 1 and 2 depending on the relation between the response and the disturbance. The response of the recuperator to mass flow disturbance has a characteristic time 4 that is between 1 and 2. An example of coupled disturbance of temperature and mass flow was simulated by the distributed parameter model. This example shows the influence of the three characteristic times to the dynamic characteristics of the recuperator. When the system power of HTGR-GT is regulated slowly, the core temperature distribution of the recuperator hardly varies. However, when the electric load of the system is rejected from full power, the core temperature, especially in the front of the recuperator, suffers from a drastic change in temperature.