Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Steam generator performance improvements for integral small modular reactors

  • Ilyas, Muhammad (Pakistan Institute of Engineering and Applied Sciences (PIEAS)) ;
  • Aydogan, Fatih (Center for Advanced Energy Studies (CAES), University of Idaho)
  • Received : 2017.01.13
  • Accepted : 2017.08.20
  • Published : 2017.12.25
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Abstract

Background: Steam generator (SG) is one of the significant components in the nuclear steam supply system. A variety of SGs have been designed and used in nuclear reactor systems. Every SG has advantages and disadvantages. A brief account of some of the existing SG designs is presented in this study. A high surface to volume ratio of a SG is required in small modular reactors to occupy the least space. In this paper, performance improvement for SGs of integral small modular reactor is proposed. Aims/Methods: For this purpose, cross-grooved microfins have been incorporated on the inner surface of the helical tube to enhance heat transfer. The primary objective of this work is to investigate thermal-hydraulic behavior of the proposed improvements through modeling in RELAP5-3D. Results and Conclusions: The results are compared with helical-coiled SGs being used in IRIS (International Reactor Innovative and Secure). The results show that the tube length reduces up to 11.56% keeping thermal and hydraulic conditions fixed. In the case of fixed size, the steam outlet temperature increases from 590.1 K to 597.0 K and the capability of power transfer from primary to secondary also increases. However, these advantages are associated with some extra pressure drop, which has to be compensated.

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