IAEA Safeguards on EnergyNotehttps://energynote.kr/en/tags/iaea-safeguards/Recent content in IAEA Safeguards on EnergyNoteHugoen-USSat, 12 Sep 2026 18:00:00 +0900Why is a nuclear reactor blue? Cherenkov radiation, explainedhttps://energynote.kr/en/posts/cherenkov-radiation/Sat, 12 Sep 2026 18:00:00 +0900https://energynote.kr/en/posts/cherenkov-radiation/<p>A deep pool lit from below, as if someone had switched on a blue fluorescent lamp under the water: it is the stock photograph of the nuclear industry. Reactors in films glow the same blue, and in <em>Watchmen</em> Doctor Manhattan&rsquo;s whole body is that color (we graded him in <a href="https://energynote.kr/en/posts/superhero-radiation-scorecard/">our superhero radiation scorecard</a>).</p>