Report: Rapidly dropping water level at Fukushima Daiichi No. 4 — Leak continues from Reactor Well/SFP/DS — Almost 3 times higher on Monday

Published: February 3rd, 2012 at 9:48 am ET
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Title: #Fukushima I Nuke Plant Reactor 4: Leak Continues from Reactor Well/SFP/DS
Source: EX-SKF
Date: February 2, 2012

TEPCO hasn’t identified the leak, but the leak is evidenced by the rapidly dropping water level of the Skimmer Surge Tank.

From Jiji Tsushin (2/3/2012):

TEPCO announced on February 3 that the water in the Reactor Pressure Vessel, Spent Fuel Pool and DS Pool in Reactor 4 continues to leak into the reactor building. The RPV, SFP, and DS Pool are filled with water to the near-full level, but the water level of the Skimmer Surge Tank is dropping twice as fast as normal, which likely indicates a leak.

The water is contaminated with radioactive materials, and is considered to be flowing to the basement of the reactor building where the contaminated water has already been sitting. The possible causes include the frozen or damaged pipe joints, and the workers are trying to identify the location(s).

EX-SKF also notes the water levels of Reactor 4 Skimmer Surge Tank:

2/3 11AM: 3179 millimeters
2/3: 5AM: 2085 mm
2/2 11AM: 2498 mm
2/2 5AM: 2784 mm
2/1 11AM: 3223 mm [...]
1/31 11AM: 3977 mm
1/31 5AM: 4357 mm
1/30 11AM: 5416 mm

Read the full report and see graphics on how the Reactor Well/SFP/DS are interconnected here

SOURCE: EX-SKF

Published: February 3rd, 2012 at 9:48 am ET
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9 comments

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9 comments to Report: Rapidly dropping water level at Fukushima Daiichi No. 4 — Leak continues from Reactor Well/SFP/DS — Almost 3 times higher on Monday

  • James2

    It’s obvious to anybody paying attention that this whole thing is at best held together with duct tape and velcro.

    And at worst is totally 100% out-of-control.

    More radioactive water stories are ineffective at diverting my attention from the continuous steam venting and fires at numerous places around the site.


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  • And what damaged the reactor well? Sounds like there is a corium there in spite of disclaimers?


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    • moonshellblue moonshellblue

      I agree. after reading the following obviously Science cannot explain the initial explosion. Science 1 April 2011:
      Vol. 332 no. 6025 pp. 24-25
      DOI: 10.1126/science.332.6025.24
      NEWS & ANALYSIS
      JAPAN DISASTER
      Pool at Stricken Reactor #4 Holds Answers to Key Safety Questions
      Eli Kintisch*
      Of all the terrible news from the crippled Fukushima Daiichi nuclear power plant, reports about the spent fuel storage pool for reactor #4 may be among the most disconcerting for scientists. The pool held the entire complement of fuel rods from the reactor’s core, which had been emptied 3 months before the 11 March earthquake and tsunami struck. And yet on 15 March the building exploded, apparently fueled by hydrogen, leaving nuclear engineers to speculate about the source. Adding to the confusion are reports of fires in the pool, a worst-case scenario that had never before occurred in a working nuclear plant. Unraveling the mysteries surrounding the #4 pool will require discovering why water levels there fell so quickly and whether the 230 tons of spent nuclear fuel melted in addition to catching on fire.


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  • or-well

    What made the Dark Ages dark?
    No plumbing.
    What hammered Minoan Crete?
    Tsunami.
    Who located Daichi coastal?
    A dummy.
    San Onofre was crippled by what?
    Pipe-whammy.
    Spec-tubular nuclear, sense bereft,
    when Nature & Plumbing means Life or Death.


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  • HoTaters HoTaters

    Good morning. What is the “DS pool” ?


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  • bmurr bmurr

    Can i just say duh??? They have been refilling it daily with the cement pouring truck since the jan 1st quake.


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  • someone

    @HoTaters:
    “DS pool” is a dryer separator pool


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