Browsing by Author "Cilliers, A.C."
Now showing items 1-10 of 10
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Benchmarking an expert fault detection and diagnostic system on the Three Mile Island accident event sequence
Cilliers, A.C. (Elsevier, 2013)Early fault identification systems enable detecting and diagnosing early onset faults or fault causes which allow maintenance planning on the equipment showing signs of deterioration or failure. This includes valve and ... -
Design and optimization of an intermediate heat exchanger in the Eskom advanced high temperature reactor
Viljoen, A.J. (North-West University (South Africa), 2019)The Eskom AHTR forms part of the next generation of nuclear reactors and aims to have a load following capability by storing heat in molten salt. The heat generated in the reactor is removed by Helium gas and should be ... -
Development of a compact, passive helium purification system for the advanced high temperature reactor
Steyn, B.S. (North-West University (South Africa), 2020)In this study the possibility of a compact, passive membrane system to separate helium from the impurities that may be present in the AHTR primary system was investigated. The current helium purification systems that are ... -
Evaluation and verification of an architecture suitable for a multi-unit control room of a pebble bed high temperature reactor nuclear power plant
Visagie, Herman (2015)Current regulations specify the minimum number of operators required per nuclear power plant. However, these requirements are based on the operation of large nuclear power plants, which are not inherent safe and can result ... -
Evaluation of an advanced fault detection system using Koeberg nuclear power plant data
Pelo, Herbert Leburu (North-West University, 2013)The control and protection system of early nuclear power plants (Generation II) have been designed and built on the then reliable analog system. Technology has evolved in recent times and digital system has replaced most ... -
Fault detection and characterisation in pressurised water reactors using real-time simulations
Cilliers, A.C.; Nicholls, D.; Helberg, A.S.J. (Elsevier, 2011)The use of real-time plant simulators running in parallel with a nuclear plant to predict the control system behaviour and highlighting unexpected plant behaviour is presented. The study is performed on a 910 MW Generation ... -
A hybrid system for condition based maintenance in nuclear power plants
Ayo-Imoru, R.M. (North-West University (South Africa), 2020)Condition-based maintenance (CBM) involves undertaking maintenance activities based on the health of the system. Establishing a CBM regime in an industry will result in eliminating unnecessary maintenance cost without ... -
Introducing advanced thorium–based fuel cycles in SA : an evolutionary approach
Du Toit, Maria Hendrina (North-West University, 2013)Past experience in several thorium fuelled research- and power reactors provides the basis and history of thorium. The material properties, fertile- and fissile isotope properties as well as the decay chain of thorium are ... -
Life-extension in a research reactor: calculation of the neutron-induced ageing of the core-box, grid-plate and beryllium reflector
Tolo, S.P. (North-West University (South Africa), 2019)The SAFARl-1 research reactor has been operating at NECSA- the South African Nuclear Energy Corporation - since 1965. SAFARI-1 is a tank-in-pool type research reactor of similar design to the original Oak Ridge Materials ... -
Preliminary economic evaluation of thorium based fuels in PWRs
Du Toit, M.H.; Cilliers, A.C. (Taylor & Francis, 2014)Many studies have proven that thorium-based fuel cycles are more expensive than current uranium fuel cycles, which is confirmed in this paper as well. This research, however, goes beyond the conventional nuclear ...