Research Papers

Thermo-Economic Performance of a Cogeneration Medium–Small Modular Nuclear Reactor Plant in Canada

[+] Author and Article Information
Gaoming Ge

Department of Mechanical Engineering,
University of Saskatchewan,
57 Campus Drive,
Saskatoon, SK S7N 5A9, Canada
e-mail: gag827@mail.usask.ca

Tomohiko Ikegawa

Energy and Environmental Systems Laboratory,
Hitachi, Ltd.,
7-2-1 Omika-cho,
Hitachi-shi 319-1221, Ibaraki, Japan
e-mail: tomohiko.ikegawa.jm@hitachi.com

Koji Nishida

Nuclear Plant Engineering Department,
Hitachi-GE Nuclear Energy, Ltd.,
1-1 Saiwai-cho 3-chome,
Hitachi-shi 317-0073, Ibaraki, Japan
e-mail: koji.nishida.vu@hitachi.com

Carey J. Simonson

Department of Mechanical Engineering,
University of Saskatchewan,
57 Campus Drive,
Saskatoon, SK S7N 5A9, Canada
e-mail: Carey.Simonson@usask.ca

1Corresponding author.

Manuscript received May 31, 2016; final manuscript received October 16, 2016; published online May 25, 2017. Assoc. Editor: Jovica R. Riznic.

ASME J of Nuclear Rad Sci 3(3), 031002 (May 25, 2017) (7 pages) Paper No: NERS-16-1052; doi: 10.1115/1.4035335 History: Received May 31, 2016; Revised October 16, 2016

Hitachi-GE developed a 300 MWel class modular simplified and medium small reactor (DMS) concept, and the DMS was originally designed for generating electricity only. In this study, the feasibility of a cogeneration DMS plant which supplies both electricity and heat is under investigation. The thermal performance of the DMS plant without or with low-, medium-, or high-temperature thermal utilization (TU) applications is evaluated by numerical simulations. The results show that the electricity generated reduces as the heating requirement of TU application becomes higher. Furthermore, the economic performance of the cogeneration DMS plant is compared with another two integrated systems: (i) DMS plus electric boilers and (ii) DMS plus natural gas boilers, for those three TU applications in Canada. The results illustrate that the DMS plus natural gas boilers system are most economic if there is no carbon tax, but with high-CO2 emissions (up to 180 kton per year). The cogeneration plant performs best as the carbon tax increases up to $40/ton. The cogeneration DMS plant is a promising scheme to supply both electricity and heat simultaneously in the economic-environmental point of view.

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Fig. 1

Schematic of the cogeneration DMS plant

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Fig. 2

Schematic of the IHX system for various thermal utilization applications

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Fig. 3

Electricity output of the DMS plant with/without thermal utilization applications

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Fig. 4

Schematic of the cogeneration DMS plant where steam condensate is returned to either condenser or feedwater line

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Fig. 5

Schematics of (a) the integrated DMS plus electric boilers system and (b) the integrated DMS plus natural gas boilers system

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Fig. 6

(a) Electricity outputs and (b) net outputs of three designs for low-temperature application during 1 yr




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