Design review and controllability assessment of the SMART-ITL secondary system for the SMART design with experimental investigation. (November 2017)

• Record Type: Journal Article
• Authors: Yun, Eunkoo; Bae, Hwang; Ryu, Sung-Uk; Yi, Sung-Jae; Park, Hyun-Sik
• Is Part Of: Annals of nuclear energy. Volume 109(2017:Nov.)
• Page Start: 538
• Page End: 547
• Publication Date: 2017-11
• Subjects: Small-sized Modular Reactor (SMR) -- System-integrated Modular Advanced ReacTor (SMART) -- SMART Integrated Test Loop (SMART-ITL) -- Secondary system; Nuclear energy -- Periodicals; Nuclear engineering -- Periodicals; 621.4805
• DOI: 10.1016/j.anucene.2017.06.003
• Languages: English
• ISSNs: 0306-4549

Abstract

Highlights: A design assessment of the secondary system of SMART-ITL was conducted using experimental and analytical approaches. The key control parameter for the secondary system was verified by thermodynamic analysis during the steady-state operation. Dynamic behaviors during a heat-up process were successfully demonstrated using a lumped heat transfer model. Appropriate design and control of the secondary system can be achieved by parametric simulation study. The present design of the secondary system can potentially be utilized for various tests of pressurized water reactor design. Abstract: This paper aims at the design review and controllability assessment of a secondary system of SMART-ITL which is an integral effect test facility for an integral type reactor of SMART. The design concepts and operating characteristics of the SMART-ITL secondary system were described, and compared with a prototype SMART plant. Then, based on an experimental investigation, the thermal-hydraulic behaviors in the secondary system were analyzed in three sequential steps: a steady-state analysis of the thermodynamic aspect, a dynamic analysis using the lumped heat transfer model, and heat-up simulations as a case study. The key parameter determining system pressure was identified in the steady-state analysis. A dynamic model was established with several physical assumptions, and validated using relevant experimental results. Then, a case study was conducted to identify the effect of recirculation water during heat-up simulations using the validated dynamic model. The results indicated that the design of the present secondary system was appropriate as a part of the integral effect test facility of SMART-ITL, and was being properly operated to match the design intent. Furthermore, the design concept of the present SMART-ITL secondary system is expected to be widely utilized for various separate and integral effects tests for pressurized water reactor designs.