Japan Earthquake | Page 2959

  • UNANALYZED CONDITION POTENTIALLY COULD AFFECT THE COMMON CONTROL ROOM
    CALVERT CLIFFS
    "At 1755 on 12/8/11, it was determined that an unanalyzed condition existed for the common Control Room for both Units. A high energy line break (HELB) barrier issue was discovered while performing a fire barrier surveillance and the condition is believed to have existed from initial plant construction. A HELB barrier was found to have a significant breach in it that could allow steam from a HELB in the Unit 2 Steam Generator Blowdown system to potentially impact equipment in the Control Room. The Control Room is not analyzed for a steam environment. The degree of the impact could not be readily determined, but could likely affect the safety related equipment in the Control Room. At 1803 on 12/8/11, Unit 2 Steam Generator Blowdown was secured to eliminate the potential for a HELB in the affected area which eliminated the potential unanalyzed condition. www.nrc.gov
    by elainekirk 2/7/2012 11:28:53 PM

  • I cannot find the emails
    .
    In the confusion following the earthquake and tsunami that damaged Japan’s Fukushima nuclear complex last March, the Nuclear Regulatory Commission said it was standing by to help.

    But a trove of e-mails posted on the NRC’s Web site shows an agency struggling to figure out how to respond and how to deal with the American public while cutting through what one official called “the fog of information” coming out of Japan. www.washingtonpost.com
    by elainekirk 2/7/2012 11:32:33 PM

  • TBS cam has been down for a few hours now
    by UKVal 2/7/2012 11:38:16 PM

  • @UKVal strange
    by elainekirk 2/7/2012 11:39:12 PM

  • @elainekirk yes - visibility looks good on the TEPCO cam so I was hoping to get a better view from TBS of some of the work on #3 & 4
    by UKVal 2/7/2012 11:40:26 PM

  • back
    by dean 2/7/2012 11:43:21 PM

  • @lilly and elaine.. the video I was talking about was posted by UKVal at 3:04 pm
    by dean 2/7/2012 11:44:36 PM

  • found few more bits nothing much
    by elainekirk 2/7/2012 11:44:38 PM

  • it's right at the end where it shows the flow meters...
    by dean 2/7/2012 11:44:49 PM

  • @dean think lilly doing it when she stocked up
    by elainekirk 2/7/2012 11:48:24 PM

  • In October a gas control system was commissioned for unit 2. This extracts and cleans the gas from the PCV to avoid leakage of caesium. Similar units are envisaged for units 1 and 3 by year end. (An initial result of enhanced monitoring due to this system was the detection of traces of Xenon, a short-lived fission product, which prompted the suggestion - despite the steady low temperature - that some criticality might be occurring in the corium. Consequently boron was added to the water, but when this did not diminish the xenon level it was clear that the minute amounts of xenon-135 originated in spontaneous fission of curium-242, Cm-244 and to a lesser extent Pu-240, not any chain reaction. Any fuel that was well-burned - this was 23 GWd/t - would contain about 0.3% Pu-240.)'' www.world-nuclear.org
    by UKVal 2/7/2012 11:48:27 PM

  • interesting statistics..
    by dean 2/7/2012 11:57:36 PM

  • 10 to the 11th power fissions to produce 1 watt of power. so if a reactor is running at 1000 mega watts.. you can calculate the number of fissions to produce 1 mega watt of power... it gets huge
    by dean 2/7/2012 11:59:11 PM

  • about one gram of fuel is consumed per day per megawatt of electrical energy produced. This means that one gram of waste products is produced per megawatt per day, which includes 0.5 grams of 239Pu. These waste products must be either reprocessed to generate more fuel or stored for the tens of thousands of years it takes for the level of radiation to reach a safe limit.
    by dean 2/7/2012 11:59:52 PM

  • time for a brain rest.. whewwww..
    by dean 2/8/2012 12:00:27 AM

  • @dean gosh, that's more waste per megawatt than I thought...
    by UKVal 2/8/2012 12:01:03 AM

  • @dean that is pretty damning
    by elainekirk 2/8/2012 12:09:03 AM

  • 'On the press conference of 2/7 AM, Tepco announced they ended up injecting 1094 Kg of boric acid to reactor 2 though they were planning to inject 960Kg....At this moment, Nuclear Safety Commission stated they need to distribute potassium iodide tablet to the citizens in 30km area or even 50km area for possible nuclear accident. They say it is because they couldn’t give potassium iodide tablet to people in 311, but you can’t help questioning, why now ?' fukushima-diary.com
    by UKVal 2/8/2012 12:10:10 AM

  • Mr. Koide talked on the radio show “Tanemaki journal” like below.

    The actual problem is there is not even the way to know what’s going on inside of the container vessel.
    Probably the fuel is as melted as mud. It’s attached to everywhere in the vessel, and the place that the mud is attached gets heated.
    If they increase the water amount, the mud may move and the new place may get heated again.
    so some place may get cool but other place may get extremely hot. so other places where no heat gauge is near may be over 100℃.
    Even robot can’t get into the vessel. We can not see inside of the vessel for longer than several decades.' fukushima-diary.com
    by UKVal 2/8/2012 12:11:31 AM

  • epco injected boric acid in the night of 2/6, and increased the water amount by 3m3.
    According the NISA’s restriction, Tepco is not supposed to increase the amount of water by more than 1m3 because it increases the contaminated water in water purifying system.
    This means Tepco needed to increase water despite of the risk to increase contaminated water.' fukushima-diary.com
    by UKVal 2/8/2012 12:13:34 AM

  • back. working on the vid
    by lillymunster 2/8/2012 12:14:54 AM

  • 'The temperature of the No. 2 reactor was 70.1 degrees Celsius (158 degrees Fahrenheit) as of 6 a.m. today, according to preliminary data, Akitsuka Kobayashi, a spokesman for the utility, said by phone. The reading fell from 72.2 degrees at 5 a.m. this morning, and is below the 93 degrees that’s used to define a cold shutdown, or safe state, of the reactor.' www.bloomberg.com Intersting - note the temperature was given out by phone...
    by UKVal 2/8/2012 12:26:26 AM

  • 'According to TEPCO, the pressure vessel at the bottom of the thermometer three are nearly equally spaced. One had remained at around 50 degrees in the morning until the day of this month, then began to rise, exceeding the 70 degrees on the night of 5. Two thermometers rest is left pointing to the front and rear both 44 degrees.' blog.goo.ne.jp Does this tell us anything about where there may be overheating?
    by UKVal 2/8/2012 12:28:58 AM

  • flowmeter pics done. Please make sure Dean sees this if he stops back and I am not around. Left one is at about "6" The max on the gauge is 20 of what is visible Right side at about "3" with the same increments as the left gauge
    by lillymunster 2/8/2012 12:30:01 AM

  • right flowmeter

    by lillymunster 2/8/2012 12:30:33 AM

  • left flowmeter

    by lillymunster 2/8/2012 12:31:14 AM

  • goodnight all....
    by UKVal 2/8/2012 12:35:25 AM

  • @UKVal night val x
    by elainekirk 2/8/2012 12:37:38 AM

  • @elainekirk night!
    by UKVal 2/8/2012 12:44:06 AM

  • The original mention of iodine distribution. I don't think it is in relation to unit 2. There was talk before about distributing it to people before any emergency so it is on hand should a disaster happen. They learned that distribution in the middle of a disaster doesn't work well.


    ◆ agent iodine, recommendations committee of the Nuclear Safety to distribute prior to home
     newspaper Tokyo 56 minutes when the 19th February 07, 2012

    Subcommittee of the Nuclear Safety Commission received a nuclear accident first Fukushima TEPCO, proceed with a review of the anti-exposure 7 Sun, summarizes the recommendations and should be distributed in advance to home around the primary agents of stable iodine to prevent thyroid cancer. Centered on the nuclear power plant within 5 km radius from there is a risk of serious damage, and subjected to pre-deliver some areas of up to 30 kilometers, and there is room for up to 50 km study area was also slightly apart.

    In the aim to reflect the new guidelines, such as disaster prevention Nuclear Regulatory Agency to develop, incorporate the proposed review are summarized in the safety committee until March.

    In a nuclear accident in Fukushima, did not reflect on the delay of the instruction is utilized in most of the country taking agents such as iodine, Fukushima Prefecture had prepared.
    (Kyodo) blog.goo.ne.jp
    by lillymunster 2/8/2012 12:50:24 AM

  • Just for comparison, one cubic meter of water fills a standard-size bath tub. I suppose one could easily fill six tubs in an hour at home. As dean pointed out the volumes of water tepco fills into the rpvs is not that great, considering that their capacity is roughly 450 cubic meters.
    by Peter 2/8/2012 1:07:26 AM

  • ...tepco's effort resembles trying to fill a swimming pool with a garden hose.
    by Peter 2/8/2012 1:09:54 AM

  • ...a leaky swimming pool that is, :)
    by Peter 2/8/2012 1:11:37 AM

  • @Peter LOL. Have they ever taken a guess at the leak rate of the reactor buildings?
    by lillymunster 2/8/2012 1:12:21 AM

  • lilly, that would be given by the volume pumped out of the basements of the turbine buildings.
    The other idea I had is that perhaps the water tepco runs through the rpv only cools the rpv which is heated by corium underneath, sort of like a leaky cauldron on a fire that you wish to prevent from turning red-hot by constantly pouring water through it.
    by Peter 2/8/2012 1:17:30 AM

  • ....the cold shutdown may be reduced to cooling an empty pot.
    by Peter 2/8/2012 1:19:55 AM

  • Stronium 90 found in groundwater outside Vermont Yankee.
    Stronium 90 found in fish near Vermont Yankee.
    Stronium 90 found in fish 150 miles away....naw that must be Chernobyl or bomb tests from the 1950's.
    www.reuters.com
    by lillymunster 2/8/2012 1:40:27 AM

  • @lillymunster oh f&&&
    by elainekirk 2/8/2012 1:50:48 AM

  • @Peter my thoughts exactly
    by elainekirk 2/8/2012 1:51:11 AM

  • @elainekirk the power companies are their own worst enemy. The make statements like that without anything to back up their claim and wonder why nobody trusts them and wants to run them out of town.
    by lillymunster 2/8/2012 1:52:32 AM

  • @lillymunster it is absolutely stunning how they imagine that polluting one stretch of water will not lead to pollution of other areas
    by elainekirk 2/8/2012 2:04:21 AM

  • The put a very unconvincing case. Since it is known the plant is leaking stronium 90 they have an obligation to prove their claim that is isn't from the plant. One would think some testing down the river would show a pattern or not. Also doesn't say what kind of fish or if it is a fish that travels distances.
    by lillymunster 2/8/2012 2:12:49 AM

  • @lillymunster no they havent named the fish which is very telling
    by elainekirk 2/8/2012 2:15:22 AM

  • low amount of cesium still being found in California milk www.nuc.berkeley.edu
    by lillymunster 2/8/2012 2:30:23 AM

  • back
    by dean 2/8/2012 2:31:53 AM

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