Analytical Design of Helical Coil Steam Generator for Hot Temperature Gas Reactor

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Abstract

Reaktor Daya Eksperimental (RDE) is a non-commercial Hot Temperature Gas Reactor (HTGR) which is currently being developed by National Nuclear Power Agency of Indonesia (BATAN). Integrated helical coil steam generator attached in the RDE is selected to generate 10 MW steam. In order to achieve the rated power, steam pressure of 62 bar, steam temperature of 798.15K and mass flowrate of 3.54 kg/s are required as the output parameters to be produced by the steam generator. A compact design of a once through counter-flow helical coil steam generator is proposed. Analytical design of the helical coil steam generator is conducted to check the heat transfer area required to achieve the rated power. A simple thermodynamic analysis combined with empirical heat transfer coefficient for convective and boiling process inside the steam generator at constant pressure was performed. It is shown that with inlet water temperature of 418.15K and helium gas inlet of 973.15K at 4.27 kg/s and 34.2 bar as the heating fluid produced output helium gas temperature of 511.42K. Based on comparison with available similar existing HTGR reactor, the calculation overestimate heat transfer surface area by around 20%. Hence, the required area to achieve the rated power for the proposed design is estimated around 60.2-75.3 m2.

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Riyandwita, B. W., Awwaludin, M., Krismawan, Zacharias, P., Siswanto, E., Setiawan, P. H., & Nugroho, A. (2019). Analytical Design of Helical Coil Steam Generator for Hot Temperature Gas Reactor. In Journal of Physics: Conference Series (Vol. 1198). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/1198/4/042014

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