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Research Papers

Fuel Assembly Design for Supercritical Water-Cooled Reactor

[+] Author and Article Information
Feng Linna

Science and Technology on Reactor System Design Technology Laboratory,
Third Section of Huafu Road, Huayang Town, Shuangliu County, Chengdu,
Sichuan Province 610213, China
e-mail: flnrever@sina.com

Zhu Fawen

Science and Technology on Reactor System Design Technology Laboratory,
Third Section of Huafu Road, Huayang Town, Shuangliu County, Chengdu,
Sichuan Province 610213, China
e-mail: 254085634@qq.com

Manuscript received March 31, 2015; final manuscript received June 8, 2015; published online December 9, 2015. Assoc. Editor: Thomas Schulenberg.

ASME J of Nuclear Rad Sci 2(1), 011014 (Dec 09, 2015) (6 pages) Paper No: NERS-15-1040; doi: 10.1115/1.4030797 History: Received March 31, 2015; Accepted June 08, 2015

The supercritical water-cooled reactor (SWCR) has been selected as one of the most promising reactors for Generation IV nuclear reactors due to its higher thermal efficiency and more simplified structure compared to the state-of-the-art light water reactors (LWRs). However, there are a large number of potential problems that must be addressed, particularly the fuel assembly design of the SCWR. SCWRs are a kind of high-temperature, high-pressure, water-cooled reactor that operates above the thermodynamic critical point of water (374°C, 22.1 MPa). Corrosion and degradation of materials used in supercritical water environments are determined by several environment- and material-dependent factors. In particular, irradiation-induced changes in microstructure and microchemistry are major concerns in a nuclear reactor. Many structural materials including alloys and ceramics have been proposed for use as SCWR components or materials for applying protective coatings in SCWRs. In this paper, the present status of supercritical fuel assembly design at home and abroad is reported. According to the special requirements of supercritical core design, a kind of configuration design of fuel assembly with two-flow core and using SiC as cladding material are proposed. The analysis results have shown that the design basically meets the requirements of fuel assembly design, which has good feasibility and performance.

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Figures

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CANDU-SCWR fuel assembly in Canada

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Fig. 2

HPLWR fuel assembly in Europe

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Fig. 1

SCLWR-H fuel assembly in Japan

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Fig. 4

2×2 Assembly cluster in China

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Fig. 5

Two-pass core design and core flow distribution

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Fig. 9

Foot piece of fuel assembly cluster

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Fig. 6

Illustration of (a) fuel assembly cluster and (b) fuel rod

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Fig. 7

Position illustration of fuel rod: (a) upper position and (b) lower position

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Fig. 8

Head piece of fuel assembly cluster

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