NHK: 3.75 sieverts per hour was detected far above Reactor 3 by helicopters dumping water on Mar. 16

Published: January 15th, 2012 at 6:42 pm ET


March 17th, 2011 – JSDF helicopter crews report dose rates of 375 R/hr 300 ft above Reactor 3, Enformable, Jan. 15, 2012:


Sent: Thu Mar 17 09:07:38 2011
Subject: FWS “Official Use Only” : 0700 EDT (March 17, 2011) USNRC Earthquake/Tsunami SitRep

Please see attached information and note that this is OUO and should not be shared outside the Federal Family. The below information is addressed further in the attachment.

Federation of Electric Power Companies of Japan (FEPC) reported at 1015 EST, March 16, 2011:

Dose rate at main gate (monitoring station 6) ranged from 150 mr/hr to 1000 mr/hr.
10 Rem/hr west of Unit 3 and 4 (assuming on roadway next to reactor buildings)
30 Rem/hr between Units 2 and 3
40 Rem/hr between Units 3 and 4

NHK media report on March 17, 0100 EDT stated that helicopter crews dumping water on Unit 3 reactor building reported dose rates at 375 R/hr at 300 ft. above the building

(1 Rem = 10 millisieverts)

See the email here


Published: January 15th, 2012 at 6:42 pm ET


Related Posts

  1. WATCH: Fukushima worker films as radiation spikes to 1.32 sieverts per hour (1,320,000 microsieverts/hr) November 16, 2011
  2. Highest Radiation Levels Yet: 1,000 millisieverts/hour found on debris outside Reactor No. 3 May 21, 2011
  3. Highest Yet: 1,600 millisieverts/hr detected in Reactor No. 3 — Radiation coming from floor (VIDEO) November 20, 2011
  4. ANOTHER REACTOR: Power company says “All the functions to keep cooling water levels in No. 3 reactor have failed” March 12, 2011
  5. Method for cooling Reactor No. 3 “isn’t cutting it” — Using triple the water as No. 1 and 2; A ‘considerable’ amount of water is missing target August 5, 2011

51 comments to NHK: 3.75 sieverts per hour was detected far above Reactor 3 by helicopters dumping water on Mar. 16

  • Mack Mack


    And look at this:

    “2011 sets new record for Emergencies and Alerts at US Nuclear Power Stations”

    • Whoopie Whoopie

      Oh man! I’m posting that one to HP PRONTO!!

    • hbjon hbjon

      Not clear if there were twice the alerts in 2011 than all ten years prior combined? NPP’s have safety sensors that when the sniffers detect a surge in radiation it causes the reactor to go into cold shutdown. How many of these were there? I know the one by me here went into scram for no apparent reason after it rained in April. I thought I heard of others doing the same thing. Anyone? There must have been massive amounts of fallout causing this huh?

    • maaa

      More like 375 sieverts rather than 3.75

  • Jebus Jebus

    And where are those helicopter crews now? I hope those were lead lined helicopters….

    • So the helicopter crews were exposed to 4 SV per hour. Was this before or after reactor #3 and #3 spent fuel pool blew up?

      Those around Chernobyl were exposed to 50 SV per hour, after it blew up, and before cleanup…

      So how can we compare these?

      • Then the Radiation at Reactor No. 1 was measured at over 200 Sieverts per hour on May 23, 2011..

        Does this mean it blew up too, or just melted down? Is this an indication that this reactor output all by itself was 4 times worse than Chernobyl where the exposure was only 50 Sieverts per hour next to it?

      • Dose, rate of dose, and time spent. And credibility.

        • zaadik

          Part of me wants to say it’s bullshit. Another part tells me that with an uncovered core, cesium-laden steam and a lack of roof this could very well be true. Yet another part starts wondering if maybe the reports of fuel somehow plopping out of the core… nah. Can’t be.

  • jec jec

    “Not be shared outside the Federal Family”–right. Got to let the bigwigs sell off their stocks and sell land/homes before the prices drop. Just keep it quiet for 10 months..before people find out how bad it really is..but 3.75 sieverts an hour over R3 at 300 ft. HUM..did anyone see the IAEG report..modified to say “use helicopters to monitor radiation” to replace local data collections with lots of dosimeters??? Not exact wording.but thats the stop local data collection information for radiation, and just use the limited info from helos. Now..just a the data provided by TEPCO..was from 300 FT or more above ground? Because helos fly in the air..they dont skim at 1 radiation reports..are bogus for ground humans. And last I checked, only human forms with wings are called angels.

  • jec jec

    3.75 Sievert/h..and TEPCO says NO MELTDOWN? Stupid. Oh wait..this is the same company who now says those same reactors are in “cold shutdown.” Hey..if all the radiation has been blown out everywhere..and is also into the groundwater..whats left except terrible radiation everywhere.

  • dharmasyd dharmasyd

    Hey Tepco, We don’t need no mo iF…ing press conferences. There’s no lie you can tell us that we don’t already know before you are willing to admit.

  • Whoopie Whoopie

    Well, that’s it for me tonight folks.
    Leave Japan if you can…
    You are in my heart and in my “prayers”.

  • vivvi

    No reason to think it is less now, either, seeing that nothing has changed at fuku. Still spewing out rads 24/7. Question is, of course, where is all that invisible death going? What goes up, must come down.

  • ShutItAllDown

    You would think that the radiation monitoring satellites would have picked this up? Surely the USG isn’t hiding this information from citizens?

    (Sarcasm, in case you didn’t pick it up)

  • Pensacola Tiger Pensacola Tiger

    I see lots of reports of radiation levels around Tokyo, but how is the rest of Japan doing? Anyone seen any reports from Okinawa?

    • Hi Pensacola Tiger-

      If you’re looking for radiation monitoring data from other areas of Japan, check out the Safecast Monitoring Maps:

      Safecast uses crowdsource data for their maps… here’s more about them:

      Safecast is a global sensor network for collecting and sharing radiation measurements to empower people with data about their environments.

      Some Key Facts About Safecast

      •Safecast was created 1 week after the 3/11 Japan earthquake.
      •Small core team, with more than 100 regular volunteers worldwide.
      •Team concentrated in Tokyo, with smaller support teams globally
      •Initially funded via Kickstarter and private donations, Safecast has just received a grant from The John S. and James L. Knight Foundation
      •Currently deployed sensors: 35 mobile / 50 handheld / 50 static
      •Another 300 devices will be active by the end 2011.
      •As of November 2011, over 1,250,000 data points collected.
      •All data collected and published by Safecast is open and available under CC0 dedication.
      •Currently designing networkable sensor devices for production in 2012.

  • vital1 vital1

    I think this situation is very serious, but we all need a bit of a laugh.
    This cartoon says it all!

  • Jebus Jebus

    OT sort of…

    I noticed that today has been a day of truths.
    These headlines here, are all confirming what enenews and the posters here have been saying all along.

    It is time to start evacuating the most vulnerable away from the reported hotspots in the least. Maybe even Tokyo.

    There has not been one “nuclear proponent” (codewords) here this weekend.

    The truth about this matter does have teeth and is putting the fear of obsolesence into the hearts of these nuclear liars and thieves.
    This is good that they have the same fear as the people of Japan have about being irradiated.

    I wish to remind the Nuclear Industry that fear and unhappiness is the biggest killer and to overcome your fear of going into history as a failure and a fluke, you must keep a smile on your face….

    • Heart of the Rose Heart of the Rose

      Oh..yes…keep that smiling up..grin fron ear to ear…
      ….it’s a sign of insolence when they meet their Maker…
      I wonder if they realize they will soon be up against millions of people with nothing left to lose.

    • HoTaters HoTaters

      Hi Jebus,

      Funny, I noticed there haven’t been the usual nuke defense posts here, too, this weekend. Glad you commented on that first & also observed it. Interesting.

    • Hilarious!!!!! you know, in a way…

    • Anthony Anthony

      I think you are right. Everytime there’s an admission of any kind a significant negative aspect seems to follow. That and admitting deeper problems after the fact seems like standard operating procedure.

  • aigeezer aigeezer

    “Usually fatal radiation poisoning. Survival occasionally possible with prompt treatment. 4Sv”

    One source (easy to access):

    • zaadik

      That would be total dose. This is a dose rate (dose/unit of time). Spending a minute or three won’t kill you at all, but it will probably damage your health.

  • OhioBoy

    Not to get off subject, but I was checking radnet ata for Phoenix back in Dec and I
    Couldn’t help but notice some really high gross beta counts, I mean cpms pegging
    in at around 850 to 950. What’s up with Phoenix?

    • Ohio Boy

      West coast, valley cities with mountains on the east get radiation trapped with all the particles that end up accumulating in trapped valley air.

      Bakersfield highest! Sacramento was high before they stopped reporting beta accurately

      Fresno CA was high. Yuma was high.

      Phoenix was high.

      I think I’m feeling the effects now but I cannot be certain yet. Hair loss, nails breaking off for me, everyone around me exhausted.

      Lots of kids getting sick to their stomach without ever symptoms of flu

      • HoTaters HoTaters

        Majia, what is your general geographic location? Am curious to know where people are who are beginning to feel health effects from the radiation. So far can only surmise it’s people on the West Coast of the U.S.

    • HoTaters HoTaters

      Other parts of Arizona also high. The gamma looks relatively high, too. Just had a look at the RadNet data for all the cities and LOTS of them have had high beta. Never took a really good look at that before ….

      What seems really odd is looking at which stations have no beta data at all, or there’s a spike and then the levels mysteriously drop back down to zero, or near zero. Or the gamma signatures where there’s an up and down zig-zag pattern, then it just flatlines or trends along in a straight line. Maybe the stations are offline sometimes and that’s how the data is interpreted? Don’t know but it sometimes looks suspicious.

      • StillJill StillJill

        HoTaters,….they cut off Sacramento’s readings, not too long ago. It did the same thing you just described,…spike, drop,(artificial),..then a low to nothing line. I think it was Bobby1 who pointed out last night, that Sac’s was cut off. That was my conclusion also,…still I love hearing someone I respect, validate these things, Yes?

        • StillJill StillJill

          Jesus, Mary, and Joseph,….did I just hear myself right? All, “Ho-Hum”. “They CUT-OFF Sacramento’s radiation monitoring”!
          After a spike????? And, this is O.K. with me HOW?????

          I choose TODAY, to call down God’s wrath! Please join me in asking our Heavenly Father to intervene on His children’s behalf. Surely WE NEED HIM. Surely HE’LL answer the cries of His children! In Jesus’s Dear Name, I pray. Amen and AMEN.

        • jec jec

          JetStream with Japan’s radiation is over Sacramento today. Thats what happened to the monitor. HIDE IT!. What is the guidence Mr. Obama has given to his trolls? HIDE HIDE HIDE results for the unwashed masses? Its tax dollars meant to protect the citizens of the USA..not for political use!

  • MaidenHeaven MaidenHeaven

    I wish to remind the Nuclear Industry that fear and unhappiness is the biggest killer and to overcome your fear of going into history as a failure and a fluke, you must keep a smile on your face….
    Well said Jebus.

    Betcha their mama’s didn’t raise em that way.

    Unfortunately these people come from all walks of life & they don’t wear tattoos on their foreheads so that Everyone would know who they are.

    Tepco announced they measured 1200 Bq/ Kg of Strontium 90 from the sea ground soil at the south side of the intake of reactor 1~4 on 1/12/2012. They also measured 15~620 Bq/ Kg of Strontium at 3 different locations.
    The samples were taken from 11/24/2011 ~ 11/25/2011. Before 311, the maximum reading was 0.17 Bq/ Kg, which is less than 1/7000 of after 311.

  • MaidenHeaven MaidenHeaven

    Needed to listen to this again today.

    “To those who can hear me I say “Do not despair”.

    “The misery that is now upon us is but the passing of greed, the bitterness of men who fear the way of human progress: the hate of men will pass and dictators die and the power they took from the people, will return to the people and so long as men die [now] liberty will never perish…”

    The Greatest Speech Ever Made

  • MaidenHeaven MaidenHeaven

    Note, on the link above if you click on See more below the video, it is available in over 20 languages.

    Here you can copy & pate the words into a Word document to print & share.

  • bmurr bmurr

    The web cam forum is shot right now, can anyone explain why they had one of those water cannon things erected over #4 spf just a few minutes ago?

  • That thing was huge; reached right over the building. I am nonplussed to see it gone so quickly.

    • Jebus Jebus

      I watched it move around a bit, poking into the reactor to the left or west of the SFP. It pulled out and swung around to the east of the reactor before swinging back, poking into the reactor again. Then it folded itself up, down in front of #4…

    • Jebus Jebus

      Nuks got the vid in the webcam thread.

      It is a very long articulated crane picking out debris and God knows what else.

  • I heard a rumor that Building #4 was complaining to the hotel staff that it had gotten a chia seed stuck in its teeth and needed some help to get it out..

    The crane was sent in to take the seed out.

    With ZERO information about what is REALLY going on inside of the FUKU Daichi plant, this story is just as good as any other…

  • Gaffney

    Well in the Chernobyl plant the radiation was 0.1 to 300SV, the really high doses were inside, on top and where debris fell. 3.75SV is high for the distance the helicopters were at and how quickly they passed. However the radiation wasn’t released the way Chernobyl was. In Chernobyl not a lot of the reactor was actually released into the air. But it had a nuclear explosion and radioactive parts were all over the place. In Fukushima none or a little amount of radioactive parts were released. But there was a lot of radioactive water and steam released and it was being released from 4 or 6 locations not one.