Smoke disrupts nuke plant restoration work, radiation fears reach Tokyo, Kyodo, March 24, 2011 at 1:03 pm EDT:
… TEPCO said, meanwhile, it had observed neutron beams, a kind of radioactive ray, 13 times on the premises of the Fukushima plant over the three days from March 13, but they were not at a dangerous level.
The detection of the beams suggests the possibility that uranium and plutonium have leaked from rods in the plant’s reactors or spent nuclear fuel pools and have undergone nuclear fission. …
Read the report here.
Published: March 23rd, 2011 at 2:20 pm ET
- Neutron beam seen 13 times at Fukushima — Maybe evidence of nuclear fission or release of plutonium March 23, 2011
- Report on neutron beams — Has a reactor at Fukushima gone “critical”? March 30, 2011
- Japan Times: It is now a “grave situation” at Fukushima — “Plutonium fission” mentioned for first time — “Criticality is very likely to have occurred” November 3, 2011
- L.A. Times: Speculation that “supercritical fission event” occurred at Fukushima reactor irradiating plutonium, says nuclear expert — Explosion so massive investigators found fuel rod fragments a mile away March 9, 2012
- Experts: Nuclear chain reactions may have lasted over 7 months at Fukushima — Neutron leakage from ‘active’ molten fuel — “Core producing radioactive sulfur” — Top Gov’t Official: MOX fuel could be neutron source April 10, 2014