L. Oriani

TL;DR: The International Reactor Innovative and Secure (IRIS) as discussed by the authors is an integral, modular, medium size (335 MWe) PWR, which has been under development since the turn of the century by an international consortium led by Westinghouse and including over 20 organizations from nine countries.

TL;DR: In this paper, a PWR with an integral reactor pressure vessel incorporating the steam generators and housed in a small high pressure containment vessel, is provided by circulating cooling water through the steam generator and heat exchangers in an external tank to cool the reactor vessel at a rate sufficient to lower the pressure in the vessel below that in containment.

TL;DR: The supercritical water reactor (SCWR) has been the object of interest throughout the nuclear Generation IV community because of its high potential: a simple, direct cycle, compact configuration; elimination of many traditional LWR components; operation at coolant temperatures much higher than traditional LOWRs and thus high thermal efficiency.

TL;DR: The SPES3 facility as discussed by the authors is an integral test facility for the IRIS project, with a 1 : 100 volume scale, full elevation, and prototypical thermal-hydraulic conditions.

TL;DR: The International Reactor Innovative and Secure (IRIS) is a modular pressurized water reactor with an integral configuration (all primary system components, internals, pumps, steam generators, pressurizer, and control rod drive mechanisms are inside the reactor vessel) as discussed by the authors.