Refer to the following links for current progress in pebble bed reactor technology:

• American Nuclear Society: Pebble Bed Reactor
• INIS Web Services: Modular Pebble Bed Reactor
• MIT Technology Review: The Next Nuclear Plant
• Modular Pebble Bed Reactor (Pty) Ltd.
• High Temperature Reactor Technology Network
• Pebble Bed Reactor Technology in South Africa
• Tsinghua University: High Temperature Gas-Cooled Reactor