TEPCO Downgrades Thermometers After 80°C Spike, But Data Suggests a Systemic Issue

TEPCO Reports Unexpected 80°C Temperature Rise in Reactor 1 TEPCO recently reported that a thermometer in Fukushima Daiichi’s Reactor 1 recorded an unexpected 80°C temperature increase following nitrogen injection into the primary containment vessel (PCV). Initially, this raised concerns about a possible heat source inside the containment vessel . However, after an internal review, TEPCO concluded…