Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

CURRENT GLOBAL VISITORS (CLICK GLOBE)
D-FOX: PLEASE CONTACT US IMMEDIATELY

If you can read this message, please contact us immediately at the following email address:

thecomingcrisis@gmail.com

We'd like to communicate.

D-FOX

WELCOME TO CRISISFORUMS.ORG!
(1) Please swing by our "HELP CENTER" to view our forum rules prior to posting or commenting.
(2) Acknowledge that by commenting or posting, you take full responsibility for the content and message of the information you put forth, which do not necessarily reflect the opinions of this website.
(3) If you ever need assistance, simply contact one of the staff or send us an email and we'll be glad to help.

The Robots Sent Into Fukushima Just Keep Dying

The Robots Sent Into Fukushima Just Keep Dying

Tyler Durdens picture
Mar 4, 2017 9:15 PM

Via Yvette Tan of Mashable.com,

The robots sent in to investigate the nuclear fallout at Fukushima just aren't good enough.

 

Tokyo Electric Power Company's (TEPCO) head of decommissioning admitted on Thursday that more creativity was needed in developing its robots sent to the reactive zone.

The Fukushima nuclear power plant was massively damaged in 2011, when three of the six nuclear reactors suffered meltdown after being struck by a 9.0-magnitude earthquake and associated tsunami waves.

More than 100,000 residents of the nearby Fukushima Prefecture had to be relocated, and the government has spent the last five years struggling with the aftermath. The incident is regarded as the world's largest nuclear disaster since Chernobyl.

Part of the clean-up includes robots, sent in to probe the site, because radiation levels are too high for humans.

But earlier last month, a robot sent into Fukushima's No. 2 reactor was forced to abort its mission after it was blocked by deposits — believed to be a mixture of melted fuel and broken pieces of structure.

Two previous robots had also failed in its missions after one was stuck in a gap and another was abandoned after being unable to find fuel during six days of searching.

This is an example of one of the robots TEPCO had sent to probe the area in the past.

http://www.zerohedge.com/news/2017-03-04/robots-sent-fukushima-just-keep-dying



"We are shaped by our thoughts; we become what we think. When the mind is pure, joy follows like a shadow that never leaves."

Comments

  • Hmm - it sounds like the robots are just running into physical obstacles they can't overcome:

    #1  Blocked by deposits of debris

    #2  Got stuck in a gap

    #3  Abandoned after failing to find any reactor fuel (presumably because bringing it back out would be hazardous)

    The headlines about the robots I've seen are written to suggest the radiation is destroying the robots, but that doesn't seem to be the case.
    People in this world look at things mistakenly, and think that what they do not understand must be the void. This is not the true void. It is bewilderment.
    - Miyamoto Musashi, The Book of Five Rings
  • Rosie_MOD_Rosie_MOD_ Moderator
    You're right. What is the point of bringing the robots back out?  They'd be contaminated with  huge amounts of radioactivity which would kill anyone who came within proximity  within moments.

    "We are shaped by our thoughts; we become what we think. When the mind is pure, joy follows like a shadow that never leaves."

  • Matt_ADMIN_Matt_ADMIN_ Administrator
    Hmm - it sounds like the robots are just running into physical obstacles they can't overcome:

    #1  Blocked by deposits of debris

    #2  Got stuck in a gap

    #3  Abandoned after failing to find any reactor fuel (presumably because bringing it back out would be hazardous)

    The headlines about the robots I've seen are written to suggest the radiation is destroying the robots, but that doesn't seem to be the case.
    I was under this impression as well - so the robots aren't in fact being melted by the radiation?
    -------------------
    "...Say, 'GOD is sufficient for me.' In Him the trusters shall trust." (Quran 39:38)
  • GrumpyGuyGrumpyGuy Member
    edited March 6
    I did a search for robots that were actually destroyed, but didn't turn up anything.

    An article from the Washington Post quotes TEPCO as saying a robot would be destroyed within two hours of exposure to the 530 sieverts/hr radiation levels in the #2 reactor core.  It doesn't look like they've actually tried sending robots into the cores yet - only a remote camera device of some sort.  It appears they are trying to figure out how to gather more data inside the cores because of the danger.

    The article:  https://www.washingtonpost.com/news/worldviews/wp/2017/02/08/japanese-nuclear-plant-just-recorded-an-astronomical-radiation-level-should-we-be-worried/?utm_term=.0721a75cef2e

    There is no doubt the radiation level is extremely high, and that much danger exists as a result.  It is a dilemma that needs a solution that does not seem forthcoming at the moment, and it isn't being taken seriously enough from the looks of things.

    That said I can find no reason to support Zerohedge's headline and frankly consider it a peculiar choice of wording.  I'm going to call them out on alarmism here.

    People in this world look at things mistakenly, and think that what they do not understand must be the void. This is not the true void. It is bewilderment.
    - Miyamoto Musashi, The Book of Five Rings
  • Rosie_MOD_Rosie_MOD_ Moderator
    That said I can find no reason to support Zerohedge's headline and frankly consider it a peculiar choice of wording.  I'm going to call them out on alarmism here.

    Zero Hedge actually copied the article from a site named Mashable.
    http://mashable.com/2017/03/03/fukushima-robots-fail/#6kSIHvsdSkq0

    Needless to say as I was responsible for posting the item,  I'll investigate further to see what else I can find. Thanks for pointing that out, Sean.

    "We are shaped by our thoughts; we become what we think. When the mind is pure, joy follows like a shadow that never leaves."

  • Ahh, I hadn't spotted that.  Good eye.

    From what I can find Mashable articles are often blog-style posts written by just about anyone, so that probably explains the contrast between the headline and the data.
    People in this world look at things mistakenly, and think that what they do not understand must be the void. This is not the true void. It is bewilderment.
    - Miyamoto Musashi, The Book of Five Rings
  • Rosie_MOD_Rosie_MOD_ Moderator

    These are from Tepco's own website:


    Application of Robot Technology

    Movie Stabilization and Decommissioning of Fukushima Daiichi Nuclear Power Station by applying robot technology[Movie] Stabilization and Decommissioning of Fukushima Daiichi Nuclear Power Station by applying robot technology

    We apply remote techniques to stabilize the accident and to promote decommissioning process in Fukushima Daiichi Nuclear Power Station.
    So far, robots have been taking our place to research inside reactor buildings and to reflect the results to the plans, which contributes to the reduction of operational risk of radiation exposure.
    We are expecting to apply remote techniques further to the operations, such as the decontamination of the high-dose radiation area inside the reactor buildings and the removal of fuel debris from the reactor contaminant vessel or the reactor pressure vessel.
    Many corporations and organizations both domestic and overseas have been supporting and cooperating on robots and the related technologies. We really appreciate those who have been cooperating with us since the accident and would like to promote long-term decommissioning processes steadily with the understanding and cooperation of many.
    In this page, we are going to summarize robot applications inside the reactor buildings, which have been introduced chronologically in the "Photos and Videos Library" of our web page since the accident.

    Robots inside the reactor buildings

    The reactor buildings

    Robots applied mainly above the 1st floor

    Robots being applied mainly above the 1st floor

    Robots applied mainly on the basement floor

    Robots being applied mainly on the basement floor
    http://www.tepco.co.jp/en/decommision/principles/robot/index-e.html

    "We are shaped by our thoughts; we become what we think. When the mind is pure, joy follows like a shadow that never leaves."

  • Rosie_MOD_Rosie_MOD_ Moderator
    and more from Tepco's website

    Fukushima Daiichi NPS Prompt Report 2017

    Fukushima Daiichi NPS Prompt Report (Feb 10,2017)Recent Topics:TEPCO HOLDINGS SENT ROBOT INTO FUKUSHIMA DAIICHI UNIT 2 REACTOR TO CLEAR PATH FOR LATER INVESTIGATION WITH "SCORPION" ROBOT

    Robot also took digital images of the deposits on the path toward the pedestal area


    TOKYO, Feb. 10-Based on the digital images that were obtained from the preparatory investigations, a robot was sent yesterday into the Unit 2 Primary Containment Vessel (PCV) at Fukushima Daiichi Nuclear Power Station to clear a path for the "Scorpion" robot to further explore the PCV.

    The robot removed a part of potentially troublesome deposits (one fifth of the originally planned area) on the rail that will be used to insert the Scorpion robot and then was retrieved because it run on the deposits and also the camera became dark after about two hours of removal work due to the effect of high radiation.

    The robot also took pictures of the deposits and help engineers determine whether they will pose obstacles to the Scorpion's insertion.  The photos will also help engineers select the best route for Scorpion to take to the pedestal area, the bottom of the PCV where fuel melted during the March 2011 accident, fell to, and resolidified, together with earlier photographs that indicate parts of the metal grating, used as a floor inside the PCV when it was operating normally, may be missing.

    Following a remote-controlled telescopic inspection last week that detected a high radiation level inside the PCV, the robot also detected a higher level of radiation (as high as 650 Sieverts per hour) during the cleaning work.

    Safety Precautions Taken

    Various safety precautions have been taken to ensure that the radiation remains inside the PCV and to protect the robot. Based on the previous radiation measurements, the robot and cameras are designed to withstand 100 Sieverts per hour for 10 hours and the time it spends inside the PCV will be adjusted as necessary.

    Although the levels of radiation inside the PCV discovered from the previous telescopic inspection and the robot insertion this time were high, there is no reason to believe that the level itself has increased or "spiked," as some reports suggested. The levels reported from inside the PCV were estimates based on noise images on the camera screen, and have a margin of error of plus or minus 30 percent.

    There has also been no change to radiation levels outside the PCV. Extra precautions have been taken to prevent leaks of radiation during the investigation. The penetration pipe through the PCV wall is tightly shielded, and the work area is pressurized so that air only moves from the outside into the PCV and not the reverse. TEPCO Holdings routinely discloses on its website sampling results of radiation on the premises of the power station, and that sampling shows no significant changes. Overall, ambient radiation at the Fukushima Daiichi facility has been greatly reduced over the last few years, enhancing both the environment and worker safety, and has allowed workers to work across a much greater area without full protective gear.

    For more information on the findings from this past week's telescopic investigation of Unit 2 PCV, go to http://www.tepco.co.jp/en/nu/fukushima-np/handouts/2017/images/handouts_170202_01-e.pdf

    Photographs and a video of yesterday's robot activity are available together with a detailed document at http://photo.tepco.co.jp/en/date/2017/201702-e/170209-01e.html

    http://www.tepco.co.jp/en/press/corp-com/release/2017/1375551_10469.html

    "We are shaped by our thoughts; we become what we think. When the mind is pure, joy follows like a shadow that never leaves."

  • Rosie_MOD_Rosie_MOD_ Moderator
    from NHK news Japan

    Robot Stops Working in Fukushima Reactor

    The operator of the crippled Fukushima Daiichi nuclear power plant says it suspended a survey by a robot at one of its reactors after the device stopped working.

    Tokyo Electric Power Company, or TEPCO, sent the scorpion-shaped robot into the containment vessel of the plant's No. 2 reactor on Thursday.

    The company believes fuel in the reactor melted through its core during the 2011 accident and accumulated at the bottom of the facility's containment vessel.

    The survey was aimed at getting a close look at what could be fuel debris -- a mixture of nuclear fuel and melted parts of the reactor.

    The robot was also expected to measure radiation and temperatures there to gather data for scrapping the reactor.

    TEPCO officials say the device was advancing on a metal rail leading to a central area below the reactor's core, but stopped moving before it could reach the center.

    The officials say they decided to give up the robot and cut its remote-control cable.

    TEPCO plans to analyze data collected by the robot and figure out how to carry out future probes.

    https://www3.nhk.or.jp/nhkworld/nhknewsline/nuclearwatch/robotstopsworkinginfukushimareactor/

    "We are shaped by our thoughts; we become what we think. When the mind is pure, joy follows like a shadow that never leaves."

  • Rosie_MOD_Rosie_MOD_ Moderator
    edited March 7

    Robot stuck in Fukushima No. 2 reactor on 1st try, abandoned

    THE ASAHI SHIMBUN

    February 17, 2017 at 15:45 JST


    The Sasori robot surveys the interior of the containment vessel of the No. 2 reactor at the Fukushima No. 1 nuclear power plant before getting stuck and being abandoned on Feb. 16. (Provided by International Research Institute for Nuclear Decommissioning)

    In the latest hitch in efforts to decommission reactors at the Fukushima No. 1 nuclear power plant, a robotic surveyor became mired in deposits and was lost on its maiden journey on Feb. 16.

    Tokyo Electric Power Co., which operates the plant in Fukushima Prefecture, had to abandon the Sasori (scorpion) robot after it became stuck inside the containment vessel of the power station's No. 2 reactor that morning.

    The highly touted probe was specially developed for the important task of surveying the interior of the crippled reactor and collecting data to assist in removing the melted fuel.

    But with the environment inside too treacherous for a key component in the process, TEPCO’s decommissioning project seems to have come to a standstill.

    According to the utility, the robot entered the containment vessel around 8 a.m. It traveled along a 7.2-meter-long rail connecting the outer wall of the containment vessel with its central portion immediately beneath the pressure vessel.

    But about 5 meters into its mission, the robot’s controls started to become less responsive. TEPCO believes it was due to deposits and other debris that are blocking the rail entering its drive system.

    The operator tugged on the electrical cable connected to the robot and had it pull back to an area along its path with less obstacles, but it ultimately became stuck there.

    http://www.asahi.com/ajw/articles/AJ201702170048.html



    "We are shaped by our thoughts; we become what we think. When the mind is pure, joy follows like a shadow that never leaves."

  • Thanks for posting all of that, Rosie - very interesting to read.

    It must be incredibly challenging to explore the site with robots, given that they have only limited idea of what to expect inside and a complete inability to send people in to help out.  Frustrating, too.
    People in this world look at things mistakenly, and think that what they do not understand must be the void. This is not the true void. It is bewilderment.
    - Miyamoto Musashi, The Book of Five Rings
  • Rosie_MOD_Rosie_MOD_ Moderator
    I doubt too many robots will make it back for lunch and a cold sake. One step through the door and the whole room would clear.  Taking a shower to decontaminate would probably only cause a rust problem.

    "We are shaped by our thoughts; we become what we think. When the mind is pure, joy follows like a shadow that never leaves."

Sign In or Register to comment.