19-23 Oct 2015

Serpong, Indonesia

Training Course on High Temperature Gas Cooled Reactor (HTGR) Technology


Indonesia's National Nuclear Energy Agency, BATAN, hosted an IAEA Training Course on High Temperature Gas-cooled Reactor (HTGR) in Serpong, Indonesia. More than 40 participants from 17 Member States discussed the technological features of modular HTGR designs, including inherent safety characteristics, and how these impact the design choices and safety evaluation of this reactor type.


High Temperature Gas-Cooled Reactors have been built and operated in Member States as far back as the 1970s, both experimental and demonstration plants. A wealth of knowledge has been collected from these facilities. Due to various reasons, since the closure of the German HTGR programme, only two new experimental HTGR reactors were built, in Japan and China. The project in South Africa came to an end in 2010 but other member states are continuing technology development. However, knowledge in this area is slowly dwindling, due to the ageing of experts and some other ways of attrition. The Technical Working Group on Gas-Cooled Reactors (TWG-GCR) has recommended continuation of knowledge management and preservation of the HTGR technology through training courses and workshops. To this end, the outline of a training course was designed in 2011, ostensibly to cover all areas of the HTGR technology. The first course was presented in Beijing, China in October 2012. This training course is thus the second in what is intended to be a series of these courses to be developed to maintain, capture and expand the knowledge in HTGR technology.

The construction of the High Temperature Reactor - Pebble Bed Module (HTR-PM) industrial demonstration power plant in China (with expected operation around the end of 2017) will also make HTGR technology available for near term commercial deployment. This may require many more member states to become familiar with the HTGR technology. In Indonesia the project to develop and construct the experimental power reactor (called the RDE and based on a 10MWth pebble-bed HTGR) has started this year and the hosting of the training course at BATAN, where the future construction site is located, is thus also fitting.


The purpose of the training course/workshop is to present those salient technological features of HTGRs that make them inherently safe and how this impact on the complete design and safety evaluation. This includes the fuel technology, reactor design, heat removal, safety analysis and power conversion systems in both the prismatic block and pebble bed HTGR designs. Ultimately, the training course / workshop will also highlight contemporary research and development efforts towards making HTGRs more resistant to Fukushima-like nuclear accidents. The expert presentations will be followed by discussions among the participants, the primary goal being to exchange information and to impart knowledge. The presentations and discussions will be led by experts from designer and research organizations which are working on HTGR plant design, fuel development, safety evaluations, software developments, and system and component design. Recent developments and the status of today’s technology developments and research will also be highlighted.


Session 1: Introduction and Overview

Session 2: Safety of the Modular HTGR

Session 3: Member State Activities

Session 4: Safety and Analysis of HTGRs

Session 5-A: Fuel Design, Manufacturing and Performance I

Session 5-B: Designs and Process Heat Applications

Session 6-A: Fuel Design, Manufacturing and Performance II

Session 6-B: Reactor Design, Analysis and Test Facilities

Session 7: The Future, Closing Thoughts and Evaluation of course

Scientific Secretary:

Mr Frederik Reitsma
Nuclear Power Technology Development Section
Division of Nuclear Power
Department of Nuclear Energy