FOIA Documents Related to Fukushima Daiichi Reactor 1

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 1

March 11th, 2011 – NHK reports Fukushima Units 1 and 2 experiencing cooling problems

March 11th, 2011 – Fukushima Daiichi Unit 1 not able to get to cold shutdown

 March 11th, 2011 – Temperature in Reactor 1 Fuel Rods Up 50% Above Normal Levels

March 11th, 2011 – They are struggling to shut down the plant – We all need to say a prayer

March 11th, 2011 – Fukushima Daiichi fuel could have been broken because iodine concentration in air began to be increased at the site boundary

March 11th, 2011 – Radioactive Steam Could Be Released From Fukushima Daiichi After NRC Knew Temperature in Reactor 1 Fuel Rods Up 50% Above Normal Levels

March 11th, 2011 – BBC is reporting radiation levels at reactor are 1000x normal. I feel like crying.

March 11th, 2011 – If units 1, 2 and 3 have all lost emergency diesel generators, it would seem that this is more than coincidence

March 11th, 2011 – 4 Units on RCIC – 1 Unit Without AC – Different Unit With Active ECCS Due to High Containment Temperatures or Pressure

NRC estimated Fukushima Reactor 1 Core damage 13 hours after earthquake

March 12th 2011 12:52 PM FOAI Communication – Reactor 1 Water level was known to be below top of active fuel

March 12th 2011 – Core Damage at Unit 1 Prior to Explosion

March 12th report says Fukushima Reactor 1 exploded after “vertical earthquake” under unit which did not affect other reactors

Hydrogen leak leading to Fukushima Unit 1 explosion caused by earthquake impact

4 out of 40 GE workers assisting with refueling at Fukushima in March 2011 were contaminated after Reactor 1 explosion

WANO update to NRC after Fukushima Reactor 1 Explosion – Not sure if explosion or venting reduced pressure

NRC was concerned that Fukushima Reactor 1 was a steam explosion in containment

NRC Transcripts show concerns about Fukushima Daiichi Reactor 1 Explosion

March 13th, 2011 – Fukushima Unit 1 Core Damage and Release of fission products

March 14th, 2011 – Core Damage at R1 Likely – Core Coverage Uncertain – R2 very similar to Quad Cities/Duane Arnold

March 16th, 2011 – Fukushima Units 1,2,3 have fuel damage – Lost secondary containment integrity

March 23rd, 2011 – Suspect 3 ft of salt in bottom of reactor vessel – SFP lasted 3 days

March 24th, 2011 – Ross has concerns – How did TEPCO get 1 or 2 EDG’s back but not others?

March 26th, 2011 – Mark 1 hydrogen explosion damaging torus/suppression pool

March 26th, 2011 – Mark 1 containment vulnerable to melt through – SBO

April 25th, 2011 – Reactor 1 Seeming Stop of DW Water Level Increase

April 28th, 2011 – Mathcad analysis of Reactor 1 Lower Head Integrity

April 28th, 2011 – Clarification of methods used for Reactor 1 Lower Head Analysis

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