In this article we will analyze the relevance of OK-650 reactor in the current context, exploring its implications in various areas. OK-650 reactor has been an object of interest and study for a long time, and its influence continues to be a cause for debate and reflection. Throughout history, OK-650 reactor has played a fundamental role in different areas, from politics to culture, technology and society in general. In this sense, it is crucial to understand the importance of OK-650 reactor in today's world, as well as its potential to shape the future. Through an in-depth and multidisciplinary analysis, this article aims to shed light on the relevance of OK-650 reactor today, offering a critical and reflective look at its impact and possible long-term implications.

The OK-650 reactor is the nuclear fission reactor used for powering the Soviet Navy's Project 685 Плавник/Plavnik (Mike), Project 971 Щука-Б/Shchuka-B (Akula),[1] and Project 945 Барракуда/Barrakuda, Кондор/Kondor, and Марс/Mars (Sierra) submarines, and in pairs to power the Project 941 Акула/Akula (Typhoon) and Project 949 Гранит/Granit and Антей/Antei (Oscar) third generation submarines.

This pressurized water reactor (PWR) uses 20-45% enriched uranium-235[2] fuel to produce 190 MW of thermal power. Developed during the 1970s, these reactors were designed with the aim of minimizing accidents and malfunctions. Monitoring subsystems, designed for rapid detection of leaks, were included, along with newer-generation emergency cooling systems for the main reactor core.[3] The reactor is now also used to power the new Project 955 Borei submarines. It was developed by OKBM Afrikantov.
| Version | Uranium enrichment (%) | Power (MW) | Vessel type (number of reactors) |
|---|---|---|---|
| OK-650[4]
(OK-650A) |
21-45 | 190 (180) | Sierra-class submarine (1) |
| OK-650B[4] | 21-45 | 190 | Oscar-class submarine (2), Akula-class submarine (1) |
| OK-650B-3[5] | 21-45 | 190 | K-278 Komsomolets (1) |
| OK-650VV[4] | 21-45 | 190 | Typhoon-class submarine (2) |
| OK-650V[6][7] | 21-45 | 190 | Oscar II-class submarine (2), Borei-class submarine (1) |
| OK-650KPM[8] | 21-45 | 200 | Yasen-class submarine (1) |