FOIA Documents Related to Fukushima Daiichi Reactor 4

Our FOIA archives feature collected and sorted FOIA documents, and are sub-categorized by event, topic, importance, and type. Email chains are extracted and published according to date. Press releases are archived by date of publication. Presentation materials and pdfs are summarized and displayed in whole. Each post is titled with the date of transmission of that particular FOIA combined with the subject of the message.

FOIA’s Related to Reactor 4


NRC Transcripts – TEPCO video of Unit 4 SFP inconclusive – Japan claiming reflection of water but could be anything

NRC Transcripts – Chuck Casto Re Fukushima Unit 4 – “For me, I’m evermore convinced that there’s nothing there. There’s major damage to that building. And I just have to stake my career on it.”

NRC Transcript – TEPCO relayed information Unit 4 SFP Dry – Walls collapsed and incapable of holding inventory – Unit 3 “everything else gone” –

NRC audio files reveal details on Reactor 4 fires and radioactive plume that traveled northwest of Fukushima Daiichi

March 15th, 2011 – Fukushima Daiichi Units Degrading – Zirconium Fire at Reactor 4 SFP – Reactor 2 Possible Reactor Vessel Breach & Ex-Vessel Core Reaction

March 15th, 2011 – NRC Calculated Fukushima Unit 4 SFP Boil-Off Decay Times 20 – 90 – 365 Days

March 15th 2011 – Unclear Fires At Reactor 4 SFP

March 15th, 2011 – The fire’s back in unit 4 – Unit 4 pool has a full core load in it and needs full attention – Holes in the upper structure from the earlier hydrogen explosion in unit 4

March 15th, 2011 UPDATE: 2000 EDT Telecon on Fukushima Daiichi – Unit 4 New Fire Broken Out – Doses in Area around 30R/hr

March 16th, 2011 – Unit 4 SFP walls have collapsed – Fuel may no longer be intact

March 16th – Reactor 2 Explosion – Fires in Reactor 4 – Onagawa NPS levels 6.1 uSv/h

NRC Fukushima Transcripts – Evidence of fuel or very highly radioactive material outside of Reactor 4 after explosion

Reactor 4 SFP dry, fuel uncovered, Radiation levels outside unit 30R/hour after fire

March 16th, 2011 – Assessing SFP Damage – SOARCA – Uncovered Spent Fuel Reports – Leak at Unit 4 SFP

March 16th 2011 – NRC Admits Zirc Fire Is Possible – But Won’t Release All the Research Data

March 18th, 2011 – Accident progression at Fukushima Reactor 4 SFP MELCOR Request

March 18th, 2011 – There’s Got to be a ton of loose materials floating in the SFP – I would not be surprised if the top 10 feet or so of the sfp was sloshed out

March 18th, 2011 – SPF Issues Investigated – Little Cladding Left – Fuel maybe in form of a rubble bed

April 19th, 2011 – NISA/TEPCO Meeting – Status of #4 SFP – JNES/Sandia LAb MELCOR Results

March 19th, 2011 – Risk of further explosions in SPFs – Should SFP be removed to temporary storage?

March 20th, 2011 – The band of elevated dose rates up to 18 mi from plant to the northwest seems to coincide with “Lube Oil Fire” in Reactor 4 SFP

March 21st, 2011 – Clarification and assessment of potential radiological release source terms for Fukushima Units 3&4 spent fuel pools

March 30th, 2011 – Events at Fukushima Units 1-4


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