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A Supercritical Water-Cooled Small Modular Reactor

[+] Author Affiliations
R. Duffey, L. K. H. Leung, D. Martin, B. Sur, M. Yetisir

Atomic Energy of Canada Limited, Chalk River, ON, Canada

Paper No. SMR2011-6548, pp. 243-250; 8 pages
doi:10.1115/SMR2011-6548
From:
  • ASME 2011 Small Modular Reactors Symposium
  • ASME 2011 Small Modular Reactors Symposium
  • Washington, DC, USA, September 28–30, 2011
  • ISBN: 978-0-7918-5473-0
  • Copyright © 2011 by Crown

abstract

A new small modular reactor (SMR) is proposed for a 300 MW(e) nuclear generating station. It is referred as the SuperSafe© Reactor (SSR) and is a scaled down version of the Canadian supercritical water-cooled reactor (SCWR), which is designed to operate at supercritical conditions (pressure of 25 MPa and fluid temperature of 625°C) at the turbine inlet with high cycle efficiencies (∼45%). The supercritical turbine technology and associated components used in the balance of plant (BOP) are similar to those in existing supercritical fossil-fired plants. The reactor core consists of fuel channels, which are submerged in a subcooled heavy-water moderator pool inside a low-pressure calandria vessel. Each fuel channel consists of a pressure tube and a ceramic insulator enclosed inside a porous stainless steel sleeve. The moderator provides cooling to fuel channels under normal operation and postulated accident scenarios. This design feature enables the use of a flash-driven passive moderator cooling — an inherent safety feature of the proposed design. A major safety goal is to achieve a passive “no core melt” configuration for the channels and fuel.

Copyright © 2011 by Crown

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