Krypton-85 and xenon-131m detected in samples from Reactor No. 2 — Xenon-131m has half life of only 12 days
Fukushima I Nuke Plant: Krypton-85 and Xenon-131m in Reactor 2 Containment Vessel Air Samples, EX-SKF, August 11, 2011:
Half life of xenon-131m is about 12 days [...]
[W]hat’s with krypton and xenon? I also read a tweet by one of the workers at the plant who said there is still radioactive iodine being released, even though TEPCO’s monitoring says iodine-131 is not detected at the plant any more.
See TEPCO’s August 10 handout here.
- Tepco Handout: Xenon detected in Reactor No. 2 containment vessel — 9 hour half-life February 14, 2012
- Krypton-85 up over 14,000% in one day at Reactor No. 2 — Kr-85 used to detect “plutonium separations” November 2, 2011
- NHK: Tepco told to find ways of measuring temperature at Reactor No. 2 and report by tomorrow — Still claimed no xenon detected February 14, 2012
- Japan Gov’t Confirms Detection of Radioactive Xenon in Reactor No. 2 November 2, 2011
- Kyoto Nuke Expert: This amount of xenon would not be detected unless melted fuel had “fission chain reaction” — Xe-133, -135 usually not present, even during operation of reactors November 2, 2011