@inproceedings{3c4b7605470e498c877a1409a44121f9,
title = "Design considerations and experimental observations for the TAMU air-cooled Reactor Cavity Cooling System for the VHTR",
abstract = "The Reactor Cavity Cooling System (RCCS) is a promising passive decay heat removal system for the Very High Temperature Reactor (VHTR) to ensure reliability of the transfer of the core residual and decay heat to the environment under all off-normal circumstances. A small scale experimental test facility was constructed at Texas A&M University (TAMU) to study pertinent multifaceted thermal hydraulic phenomena in the air-cooled reactor cavity cooling system (RCCS) design based on the General Atomics (GA) concept for the Modular High Temperature Gas-Cooled Reactor (MHTGR). The TAMU Air-Cooled Experimental Test Facility is. scale from the proposed GA-MHTGR design. Groundwork for experimental investigations focusing into the complex turbulence mixing flow behavior inside the upper plenum is currently underway. The following paper illustrates some of the chief design considerations used in construction of the experimental test facility, complete with an outline of the planned instrumentation and data acquisition methods. Computational Fluid Dynamics (CFD) simulations were carried out to furnish some insights on the overall behavior of the air flow in the system. CFD simulations assisted the placement of the flow measurement sensors location. Preliminary experimental observations of experiments at 120°C inlet temperature suggested the presence of flow reversal for cases involving single active riser at both 5 m/s and 2.25 m/s, respectively and four active risers at 2.25 m/s. Flow reversal may lead to thermal stratification inside the upper plenum by means of steady state temperature measurements. A Particle Image Velocimetry (PIV) experiment was carried out to furnish some insight on flow patterns and directions.",
keywords = "Flow reversal, Passive decay heat removal, Reactor Cavity Cooling System (RCCS), Thermal stratification, Very High Temperature Reactor (VHTR)",
author = "Sulaiman, {S. A.} and Dominguez-Ontiveros, {E. E.} and T. Alhashimi and Budd, {J. L.} and Matos, {M. D.} and Hassan, {Y. A.}",
note = "Publisher Copyright: {\textcopyright} 2015 AIP Publishing LLC.; Nuclear Science, Technology, and Engineering Conference 2014: Advancing of Nuclear Science and Energy for National Development, NuSTEC 2014 ; Conference date: 11-11-2014 Through 13-11-2014",
year = "2015",
month = apr,
day = "29",
doi = "10.1063/1.4916850",
language = "English",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
editor = "Khaidzir Hamzah and Idris, {Faridah Mohamad} and Hasan, {Abu Bakar} and Mohamed, {Abdul Aziz}",
booktitle = "Advancing of Nuclear Science and Energy for National Development",
}