

The data on this page is collected and archived from Freedom of Information Act requests filed with the Nuclear Regulatory Commission (NRC). This page is updated daily, and will accept user submissions through the contact form.

Fukushima Daiichi Monitoring Post Data

Fukushima Radiation Levels by Prefecture – MEXT

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Fukushima SPEEDI Data

Fukushima Daiichi Status Updates

Last Updated March 21st, 2012

NRC RASCAL Runs / Source Term / Data

EDE: effective dose equivalent: external (radiation received from sources outside of the body) absorbed by an individual.

TEDE: total effective dose equivalent: sum of the external dose and internal (radiation received from inside of the body) absorbed by an individual.

CEDE: committed effective dose equivalent: the total internal dose calculated over 50 years and assigned to the year it occurred. Due to inhalation or ingestion of radioactive materials.

Cloudshine: Radiation emitted by radioactive material suspended in an overhead plume.

Skyshine: upwards directed radiation reflected by the atmosphere or clouds back to the ground.

Groundshine: radiation emitted from radioactive material deposited on the ground.

AMS – Aerial Measuring System

JST-Japan Standard Time

CM – Consequence Management

USEMB – US Embassy

TCMRT – Tailored Consequence Management Response Team

AB – Air Base

NRC Fukushima Source Term – RASCAL – Pages From Ml12068a096 –

NRC Fukushima Radiation Data

International Summaries Related to the Fukushima Disaster

March 14th, 2011 – INTERNATIONAL ITEMS OF INTEREST OFFICE OF INTERNATIONAL PROGRAMS

March 17th, 2011 – Summary of meeting with Secretary Chu on Japan Fukushima Assistance

March 18th, 2011 – IRSN Fukushima Update – Reactor Statuses and Details

March 21st, 2011 – International Items of Interest – Fukushima

March 23rd, 2011 – WENRA STATEMENT ON THE FUKUSHIMA NPP ACCIDENT

March 28th, 2011 – 3M Information Regarding the Use of Respiratory Protection for Exposures to Airborne Radiation Resulting from the Nuclear Reactor Incident in Japan

June 2011 – Fukushima Nuclear Complex Severe Accident Worker Dose Management

June 30th, 2011 – Update on a Review of REMP Direct Radiation Programs and ANSI N13.37

August 2011 – EPA’s Response to Fukushima Japan Nuclear Emergency

September 1st, 2011 – Nuclear power in Japan: Fukushima and after – Nautilus Institute for Security and Sustainability

NRC Summaries Related to the Fukushima Disaster

March 12th, 2011 – NRC IN COMMUNICATION WITH JAPANESE REGULATORS

March 12th, 2011 – NRC EXPERTS DEPLOY TO JAPAN AS PART OF U.S. GOVERNMENT RESPONSE

March 13th, 2011 – NRC Sees No Harmful Radiation Reaching US From Japan

March 14th, 2011 – NRC sends additional experts to assist Japan

March 15th, 2011 – NRC ANALYSIS CONTINUES TO SUPPORT JAPAN’S PROTECTIVE ACTIONS

March 15th, 2011 – 0300 PM Congressional Report – Plus Plant Status

March 15th, 2011 – 1930 EDT – USNRC Emergency Operations Center Status Update

March 15th, 2011 – RASCAL Re-Run of 0251AM – Used in 03162011 NRC Press Release

March 15th, 2011 – RASCAL Run of 0251AM – Used in 03162011 NRC Press Release

March 16th, 2011 – NRC PROVIDES PROTECTIVE ACTION RECOMMENDATIONS BASED ON U.S. GUIDELINES

March 17th, 2011 – Fukushima Daiichi Dose Models – RASCAL Runs justifying U.S. PARs

NRC “Talking Points” – Current as of March 17, 2011, 0600 EDT

NRC Response to Events at Fukushima Reactor Site, Japan – As of March 24, 2011

March 23rd, 2011 – NRC Directions on Continuing Agency Response on Fukushima

March 27th, 2011 – 1800 EDT – USNRC Emergency Operations Center Status Update

March 12th, 2011 – 2330 EST – USNRC Emergency Operations Center Status Update

March 13th, 2011 – 1400 EST – USNRC Emergency Operations Center Status Update

March 13th, 2011 – 1400 EST – USNRC Emergency Operations Center Status Update

March 13th, 2011 – 1600 EDT – USNRC Emergency Operations Center Status Update

March 12th, 2011 – 1830 EST – USNRC Emergency Operations Center Status Update

March 13th, 2011 – 2000 EDT – USNRC Emergency Operations Center Status Update

March 13th, 2011 – 2200 EDT – USNRC Emergency Operations Center Status Update

March 14th, 2011 – 0430 EDT – USNRC Emergency Operations Center Status Update

March 14th, 2011 – 0600 EDT – USNRC Emergency Operations Center Status Update

March 14th, 2011 – 1330 EDT – USNRC Emergency Operations Center Status Update

March 14th, 2011 – 2200 EDT – USNRC Emergency Operations Center Status Update

March 13th, 2011 – 2230 EDT – USNRC Emergency Operations Center Status Update

March 15th, 2011 – 0600 EDT – USNRC Emergency Operations Center Status Update

March 15th, 2011 – 0730 EDT – USNRC Emergency Operations Center Status Update

March 15th, 2011 – 1330 EDT – USNRC Emergency Operations Center Status Update

March 15th, 2011 – 1930 EDT – USNRC Emergency Operations Center Status Update

March 16th, 2011 – 0630 EDT – USNRC Emergency Operations Center Status Update

March 16th, 2011 – 1400 EDT – USNRC Emergency Operations Center Status Update

March 16th, 2011 – 1900 EDT – USNRC Emergency Operations Center Status Update

March 17th, 2011 – 0600 EDT – USNRC Emergency Operations Center Status Update

March 17th, 2011 – 0700 EDT – USNRC Emergency Operations Center Status Update

March 17th, 2011 – 1700 EDT – USNRC Emergency Operations Center Status Update

March 18th, 2011 – 0600 EDT – USNRC Emergency Operations Center Status Update

March 18th, 2011 – 1800 EDT – USNRC Emergency Operations Center Status Update

March 22nd, 2011 – UPDATE from 2000 Telecon on Fukushima Daiichi Events

March 23rd, 2011 – UPDATE from 2000 Telecon on Fukushima Daiichi Events

March 26th, 2011 – UPDATE from 0830 Telecon on Fukushima Daiichi Events

March 27th, 2011 – UPDATE from 2000 Telecon on Fukushima Daiichi Events

FOIA’s Related to Reactor Research/Data

Entombment requires removal of RPV head – could introduce more problems than it solves

NRC likely never postulated H2 explosions size & destructive force at Fukushima

Fukushima Disaster March 11th – March 21st NRC ET Chronology Descending – Pages From C142487-03X

March 11th, 2011 – Premonitions of North Anna EQ – Why does the NRC have confidence that an eq greater than DB cannot occur in the US

March 13th, 2011 – Dams and ocean cooled plants – Imagine a sustained SBO at a PWR!

March 13th, 2011 – Certified designs of new reactors in the US are based on PGA of 0.3g

March 13th, 2011 – Talking Points on Implications of Fukushima Accident to U.S. Nuclear Plants

March 14th, 2011 – Containment Failure Values – Long term SBO, Loss of Decay Heat Removal

March 14th, 2011 – This is the TBW sequence we’ve all dreaded – Japan still very secretive

March 14th, 2011 – Any inconsistencies or statements that undermine will have lasting effects

March 14th, 2011 – SPAR Hazard Models – LOOPPWR:40-10

March 14th, 2011 – Seismic PRAs do not consider damage from earthquake aftershocks – Station Blackout Write-Up

March 14th, 2011 – OpE Nuclear Power Plant Design for Natural Phenomena

March 14th, 2011 – A good qualitative idea of the types of doses such releases can be expected to deliver

March 14th, 2011 – Is our [U.S.] battery backup power less effective than the Japanese?

March 14th, 2011 – GI-199 Questions – Due to uncertainties in the data NRC sending letter to US Plants

March 14th, 2011 – Modelling Seismic Event Sequences like the one that happened to Fukushima

March 14th, 2011 – What a licensee needs to determine to ensure not exceeding licensed limits

March 15th, 2011 – The Conditions in Japan appear to have degraded

March 15th, 2011 – NUREG-0651- Torus (Suppression Chamber) Portion of the Mark I Containment

March 15th, 2011 – Significant corrosion of the Oyster Creek torus in 1980s

March 15th, 2011 – Don’t know if Japan added hardened vent but I’m sure they are well aware of it

March 15th, 2011 – TEPCO fail on info-sharing / No N-crisis HQ for 4 days after tsunami disabled reactor cooling system

March 15th, 2011 – Don’t know if Japan added hardened vent but I’m sure they are well aware of it

March 15th, 2011 – TEPCO fail on info-sharing / No N-crisis HQ for 4 days after tsunami disabled reactor cooling system

March 15th 2011 – Table of BWR’s Mark I

March 16th, 2011 – Tsunami documents from RES – ML072920474 – ML082960196

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 16th, 2011 – Classified as OUO documents – BWR zirc fire data

March 16th, 2011 – Tried dropping water from helicopters but only hit the target once

March 17th, 2011 – MACCS calculations capable of 8,000 miles – Usually run to 1,000 miles

March 18th, 2011 – Design Basis Floods Determined from Area-Discharge Envelopes – Not comfortable with level of conservatism

March 18th, 2011 – National Weather Service Reports used to estimate precipitation are 30-40 years old

March 18th 2011 – It might be good to know the effects of salt deposition on cooling of BWR fuel assemblies

March 18th, 2011 – Tohoku-Taiheiyou-Oki Earthquake Effects On Japanese Nuclear Power Plants

March 18th, 2011- Handy Fact Sheets

March 18th, 2011 – Station Blackout Rule – 44 Units rely on battery power

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

March 21st, 2011 – Probability of NPP Ground Motions Exceeding DB high as 6%

March 21st, 2011 – Chemistry of emissions – Difference between zirc & hydrocarbons fire

March 21st, 2011 – Some questions have come up regarding the integrity of the SFP liner

March 22nd 2011 – Rundown of NISA Requests – Residual H2 in containments

March 22nd, 2011 – Radiological Consequences and SBO – External Panels

March 23rd, 2011 – Questions on Boric Acid Solubility in Seawater

March 23, 2011 – NRC Decides 20 and 30 Year Old Predictions of Stress Corrosion Cracking and Crack Growth Rate Need Careful Examination

March 23rd, 2011 – SES needs to make decision on concerns related to NPSH Credit for BWR Mark 1′s

March 23rd, 2011 – The EPA took RADNet down because they were getting data from ‘other’ sources

March 23rd, 2011 – What impact on license renewal? I’m thinking older plants a hard sell

March 23rd, 2011 – Licensing Activities Subject to Enhanced Handling Measures Post-Fukushima

March 23rd, 2011 – Regarding the NRC “Screening Process” – Never hurts to reinforce what’s already been stated

March 24th, 2011 – Core Damage Frequencies – GI-199 – Staff will re-examine some or all

March 24th, 2011 – Jack Grobe wants “all Generic Communications associated with Chernobyl”

March 25th, 2011 – Probability of Containment Failure – NUREG/CR 6920 – 1150

March 25th, 2011 – Can we predict a tsunami wave height? – Are the models valid?

March 25th, 2011 – Japanese Methods for Tsunami Analysis – Guidance Documents

March 25th, 2011- Issues with seawater in a BWR – Crack growth rate found to be 30 times higher than KAPL paper

March 25th, 2011 – Probability of Containment Failure – NUREG/CR 6920 – 1150

March 25th, 2011 – Paradigm shift as large as permanent lateral displacement of Japan

March 25th, 2011 – NISA – TEPCO – Understanding Core Condition (Ex-Vessel or not)

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

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

March 26th, 2011 – Fuel Coolant Interaction Analysis – Worse Case Melt Scenario

March 26th, 2011 – Mark 1 liner failure during severe accidents – Some made changes

March 26th, 2011 – Melt that relocates to lower head will be mixed with a lot of sea salt

March 26th, 2011 – Decommissioning Type Information –

March 27th, 2011 – Salt effects on molten core materials – Effects on energetics

March 27th, 2011 – NRC, GE, EPRI, INPO, Naval Reactors, and DOE Fukushima Severe Accident Management Measures

March 29th, 2011 – The SAMGs are specially designed for this situation, why are people trying to seem like no clear direction?

March 29th, 2011 – NRC shares Summary of TMI-2 fuel removal/cleanup with NISA

March 29th, 2011- Isotopic make up of spent fuel 5% enrichment

March 30th, 2011 – Nuclear Reactor Accidents: Three Mile Island and Fukushima – MIT ANES Symposium

March 30th, 2011 – Please fix the 18 year leaking saftety mechanisms at Indian Point ASAP.

March 30th, 2011 – Using Catawba and Browns Ferry MOX safety evaluation reports

March 31st, 2011 – Working on high priority spent fuel pool safety questions

Official Notice by Edano on April 11 on New Kinds of Evacuation Areas Pages From ML12123A059

DOEChallenges in Determining the Fukushima Isotopic Mix_Shanks

INPO Support in Japan as Soon as Possible – Pages From Pages From ML12123A057 -397 Pages 3 11 2011-11

Japan Nuclear Threat- Time Sensitive – NASA Humanoid Robot With Durable Base Pages From ML12123A057 – 397 Pages 3 11 2011

Don Helton – SFP Risk Assessment Thoughts – Pages From C142449-02LX-2

Revised to Add Utilities – ADM Costs Incurred for Support Activities in Japan – Pages From Pages From ML12123A057 -397 Pages 3 11 2011-10

NRC Went Ahead and Passed on to US Industry a Request for Installers and Operators – Pages From Pages From ML12123A057 -397 Pages 3 11 2011-9

Official Notice by Edano on April 11 on New Kinds of Evacuation Areas Pages From ML12123A059

GEH Assessment of the Existence of a Vessel Breach on Fukushima U2 – Pages From C142449-02LX-5

Fire Breaks Out Again at Fukushima’s No. 4 Reactor – Pages From Pages From ML12123A057 -397 Pages 3 11 2011-8

Dennis Rathbun Merrill Lynch Conversation – Pages From C142383-03B-2

Research on the Vulnerability of NPPBorssele in Situations Comparable to TheFukushima Accident

Ops Center Costs in Support of the Japan Event, – Pages From ML12123A057 – 397 Pages 3 11 2011-3

Standardization of Reactor Designs and International Safety Framework

External Hazards, New Insights Into Old Issues

Staff for Japan – Pages From ML12123A057 – 397 Pages 3 11 2011-5

Reoccurring Daily Calls Rev 6 – Pages From ML12123A057 – 397 Pages 3 11 2011-6

EPA Request for Measurements From US Plants – Pages From ML12123A057 – 397 Pages 3 11 2011-7

FOIA’s Related to Earthquake and Tsunami Details

March 11th, 2011 – Japanese utility execs at NRC HQ responding to the quake – Topic off-limits

FOIA’s Related to Radiation Levels

March 13th, 2011 – We live in Western (Redacted) I’ve called around and can’t secure KI

March 15th, 2011 – RASCAL Re-Run of 0251AM – Used in 03162011 NRC Press Release

March 15th, 2011 – RASCAL Run of 0251AM – Used in 03162011 NRC Press Release

March 15th, 2011 Deflect any questions about scary numbers with the “we’ll review for scientific validity”

March 16th, 2011 – Situation getting worse and NRC response continuing to increase

March 16th, 2011 – Might consider completing a worse case dose map

March 16th, 2011 – Japan reports 5 persons have received lethal radiation doses

March 16th, 2011 – Tried dropping water from helicopters but only hit the target once

March 16th, 2011 – A public meeting and our key messages must be couched accordingly

March 16th, 2011 – Prairie Island Confirmation of Radiation from Japan

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

March 17th, 2011 – Fukushima Daiichi Dose Models – RASCAL Runs justifying U.S. PARs

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

March 18th and 19th Radiation levels and other Fukushima Plant Data – Japanese

March 20th, 2011 – Navy Vice Admiral reports 150 millirem/hr Thyroid Dose in area south of Tokyo

March 22nd, 2011 – Sandia not likely to assist Oak Ridge with actual Fukushima data

US simulations failed to reproduce Fukushima-like scenarios – Something was missing

NRC Transcripts – On-site radiation levels imply nuclear fuel in the environment

Radiation spread over Japan and was detected over 100 miles from reactors within days of Fukushima nuclear disaster

NRC worried about US National Labs “chomping at the bit” to help with Fukushima Radiation analysis – Call lab directors and say “Knock it off”

USS Ronald Reagan measured 0.6 mR/hr direct gamma shine from clouds 130 miles from Fukushima Daiichi

Helicopter landed on Japanese command ship after Fukushima disaster people came back with elevated counts on feet and clothing

Ronald Reagan helicopter crews found contaminated 10,000 uCi/cm3 – Airborne plume levels at 100 nautical miles far above expected – 10 hours would put citizen in PAG

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

Japan embassy sent hand-translated government food radioactivity reports to NRC

RSMC Tokyo(JP), Obninsk(RU) and Beijing(CN) – Eastern Japan Deposition

United States was well aware of high radiation and contamination from Fukushima – Official Docs

I-131 and Cs levels Up to 54,100 Bq/kg in open field produce 100 km from Fukushima