The International Atomic Energy Agency (IAEA) maintains an online database, the Advanced Reactors Information System (ARIS), to provide access to the most up-to-date information regarding advanced nuclear reactor design and development trends.
Technical data provided includes general information, nuclear stream supply system, reactor coolant system, reactor core and core materials, and reactor pressure vessel. Nearly 80 reactor designs are currently listed, including commercialized, demonstration, experimental, and prototype reactors.
To reach ARIS, go to https://aris.iaea.org/sites/overview.html.