First Criticality on EnergyNotehttps://energynote.kr/en/tags/first-criticality/Recent content in First Criticality on EnergyNoteHugoen-USSun, 01 Nov 2026 09:00:00 +0900What does it mean when a reactor goes critical? Reactor criticality and first criticality explainedhttps://energynote.kr/en/posts/reactor-criticality-explained/Sun, 01 Nov 2026 09:00:00 +0900https://energynote.kr/en/posts/reactor-criticality-explained/<p>At 15:34 local time on Sunday, October 11, 2026, Bangladesh&rsquo;s first nuclear power reactor went critical. World Nuclear News reported it the next day, and Rosatom, the Russian state nuclear company supplying Rooppur unit 1, presented it as a major step for the project.</p>