August 27, 2013 Tony Redhead 360˚ Panoramas OPAL - Open Pool Australian Lightweight reactor August 27, 2013 Tony Redhead 360˚ Panoramas Today I had the opportunity to see and photograph ANSTO's Open Pool Australian Lightweight (OPAL), state-of-the-art 20 Megawatt reactor. It was an amazing experience, looking into OPAL. It's so crystal clear you don't initially see the water.