FOIA Documents Related to Fukushima Daiichi Reactor 1

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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