Preliminary Study on Neutronic Characteristic of LEU NTR Reactor SCCTE Core

被引：0
|
作者：
Zhao R. [1 ]
Huo H. [1 ]
机构：
[1] Division of Reactor Engineering Technology Research, China Institute of Atomic Energy, Beijing
来源：
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | 2021年 / 55卷
关键词：
Low enriched uranium; MCNP program; Neutronic characteristic; Nuclear thermal rocket; SCCTE core;
D O I：
10.7538/yzk.2021.zhuankan.0239
中图分类号：
学科分类号：
摘要：
The use of low enriched uranium (LEU) fuel is an important trend in the development of space nuclear power in recent years. Based on this, the Monte Carlo program MCNP was used to calculate and analysis the neutronic characteristics of the representative space capable cryogenic thermal engine (SCCTE) core scheme for LEU nuclear thermal rocket (NTR) reactor. The calculation results show that this scheme is a thermal-neutron reactor, and the initial excess reactivity and shutdown depth meet the requirements of normal operation. After optimization of fuel zonal enrichment, the change of radial power is relatively gentle, and the axial power peak moves up further, which is beneficial to increase the hydrogen outlet temperature, thereby increasing the specific impulse. The temperature power effects of fuel, moderator and reflector are all negative values, which meet the design requirements. The hydrogen entry effect is positive, which can compensate for part of the temperature power effect. After entering the water, the effective multiplication coefficient reaches 1.194, which means the current scheme lacks measures for criticality safety as occurring launch accident. This still needs to be further improved. © 2021, Editorial Board of Atomic Energy Science and Technology. All right reserved.
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页码：221 / 227
页数：6
相关论文
共 11 条
  • [1] DRAKE B G, HOFFMAN S J, BEATY D W., Human exploration of mars design reference architecture 5.0, (2009)
  • [2] PATEL V, DEASON W, EADES M., Center for space nuclear research (CSNR) NTP design team report, (2015)
  • [3] EADES M, DEASON W, PATEL V., SCCTE: An LEU NTP concept with tungsten cermet fuel, ANS Winter Meeting and Nuclear Technology Expo, pp. 19-22, (2015)
  • [4] (2016)
  • [5] (2016)
  • [6] LOUKIANOVA A, HANSELL C., Leveraging U.S. policy for a global commitment to HEU elimination, (2008)
  • [7] VENNERI P, DEASON W, HUSEMEYER P, Et al., Design of a tungsten CERMET LEU-NTR, Nuclear and Emerging Technology for Space, (2014)
  • [8] Memorandum on the national strategy for space nuclear power and propulsion (Space Policy Directive-6), (2020)
  • [9] SCHNITZLER B G, BOROWSKI S K., Neutronics models and analysis of the small nuclear rocket engine (SNRE), 43rd AIAA Joint Propulsion Conference, (2007)
  • [10] MCNP: A general Monte Carlo N-particle transport code, Version 5, (2003)
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