Research Papers

Development of Safety Analysis Code TACOS and Application to Fuel Qualification Test Loop

[+] Author and Article Information
Chaofei Jiang

Xi’an Jiaotong University,
No. 28, Xianning West Road, Xi’an, Shaanxi 710049, China
e-mail: chaofei.j@stu.xjtu.edu.cn

Wenxi Tian

Xi’an Jiaotong University,
No. 28, Xianning West Road, Xi’an, Shaanxi 710049, China
e-mail: wxtian@mail.xjtu.edu.cn

Suizheng Qiu

Xi’an Jiaotong University,
No. 28, Xianning West Road, Xi’an, Shaanxi 710049, China
e-mail: szqiu@mail.xjtu.edu.cn

Guanghui Su

Xi’an Jiaotong University,
No. 28, Xianning West Road, Xi’an, Shaanxi 710049, China
e-mail: ghsu@mail.xjtu.edu.cn

1Corresponding author.

Manuscript received May 31, 2015; final manuscript received September 26, 2016; published online December 20, 2016. Assoc. Editor: Thomas Schulenberg.

ASME J of Nuclear Rad Sci 3(1), 011002 (Dec 20, 2016) (8 pages) Paper No: NERS-15-1106; doi: 10.1115/1.4035046 History: Received May 31, 2015; Accepted October 05, 2016

In this study, transient analysis code of SCWRs (TACOS), with the ability of simulating transients or accidents under both supercritical water (SCW) conditions and subcritical water conditions, has been developed with fortran 90 language, and simulation has been performed to the European SCWR fuel qualification test (FQT) system. The semi-implicit finite difference technique was adopted for the solution of coolant dynamic behavior in the loop. Furthermore, an illustration of numerical solution for the heat structure model and other models was presented. The code TACOS is then applied to simulate the Edward-O’Brian blow-down experiment to evaluate its capacity in simulating the fast blow-down progress. Therefore, the design basis accidents (DBAs) with the trans-critical transient were investigated for the SCWR-FQT system. The results by TACOS indicate that the SCWR-FQT with the existing safety system can be cooled effectively.

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Fig. 1

Staggered grid layout

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Fig. 2

Mesh scheme for heat structure

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Fig. 3

Mesh scheme for fuel rods

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Fig. 4

Comparison of results by TACOS and experiment data: (a) pressure variation and (b) void fraction variation

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Fig. 5

Pressure variation of Case 1: (a) pressure variation and (b) void fraction variation

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Fig. 6

Pressure variation of Case 2

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Fig. 7

Pressure variation of Case 3

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Fig. 8

Sketch of the SCWR-FQT loop [9]

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Fig. 9

Schematic diagram of active channel (not in scale)

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Fig. 10

Nodalization of SCWR-FQT in code TACOS

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Fig. 11

Fluid temperature distribution in active channel

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Fig. 12

Mass flow of safety system

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Fig. 13

Mass flow of core inlet and outlet

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Fig. 14

Temperature of core inlet and outlet

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Fig. 15

Pressure at core inlet and outlet

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Fig. 16

Maximum cladding temperature (at node 4 of cladding)



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