US nuke industry report: Explosions at Fukushima Units 1, 3, 4 may have caused inventory (nuclear rods) to be lost from spent fuel pools — “Debris” on ground near Unit 3 was extremely radioactive after blast

Published: November 11th, 2011 at 4:28 pm ET
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Special Report on the Nuclear Accident at the Fukushima Daiichi Nuclear Power Station, INPO (Institute of Nuclear Power Operations), November 2011 [Emphasis Added]:

  • “Hydrogen explosions in the units 1, 3, and 4 reactor buildings, coupled with the loss of the blowout panel in Unit 2, resulted in the SFPs of all units being exposed to atmosphere. The explosions may have also caused additional inventory to be lost from the pools.”
  • “A large hydrogen explosion occurred in the Unit 3 reactor building at 1101 on March 14 […] Debris on the ground near the unit was extremely radioactive

Yet the report contradicts itself in the conclusion to section 4.5 Spent Fuel Pools, “Subsequent analyses and inspections determined [...] that no significant fuel damage had occurred.”

Document link: fukushima report.pdf

See also: NYTimes on "Ejection of Nuclear Material": Confidential US doc suggests pieces of fuel blown up to a mile away -- Some between two units bulldozed over

New York Times by James Glanz and William J. Broad, April 5, 2011:

“The [confidential U.S.] document also suggests that fragments or particles of nuclear fuel from spent fuel pools above the reactors were blown “up to one mile from the units,” and that pieces of highly radioactive material fell between two units and had to be “bulldozed over,” presumably to protect workers at the site.”

“The ejection of nuclear material, which may have occurred during one of the earlier hydrogen explosions, may indicate more extensive damage to the extremely radioactive pools than previously disclosed.”

Published: November 11th, 2011 at 4:28 pm ET
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