Tepco: “Radioactively contaminated water” came from ruptured frozen pipes — Only cesium was removed — NHK had claimed no radioactivity

Published: January 29th, 2012 at 7:47 pm ET
By
Email Article Email Article
9 comments


Title: Japan finds water leaks at stricken nuclear plant
Source: Reuters
Date: Jan 29, 2012

Japan’s stricken nuclear power plant has leaked more than 600 litres of water, forcing it to briefly suspend cooling operations at a spent-fuel pond at the weekend [...]

“The leakage is believed to have been caused by freezing due to cold weather, and the leaked water included radioactively contaminated water that has been purified,” the Nikkei said in its online edition, quoting Tepco.

“The contamination level is low.”

Read the report here

See also: Tepco: Frozen water ruptures pipes at Fukushima plant -- Cooling system stops at Spent Fuel Pool No. 4 — Tepco said “leaked water did not contain any radioactive materials”

How much radioactive material remains after cesium ‘purification’? “In December, contaminated water containing strontium whose concentration level was 1 million times higher than the government’s safety standard leaked into the sea” -Asahi

Tepco Press Release:

- At 8:49 am on January 29, since a gradual decline was confirmed in the amount of treatment at the second Cesium adsorption apparatus (sally), we temporarily stopped this facility in order to conduct reverse wash of the filter.

- At 9:50 am of January 29, one of our employees, during adjustment works of the water flow to the feed water spray system, found a water leak from near the flow rate detector of the emergency reactor injection pump on the hill (C) which is now at standby. We shut down the valve at the leakage point and at 9:55 am confirmed that the water leak has stopped (amount of leakage under examination). The leakage point is on the hill (at the front of the main office building) and there are traces that show that a certain amount of water has flowed into the drain, and we are examining whether this water has flowed into the ocean or not. The surface radioactivity concentration near the leakage point is as the same level as the atmosphere around (radioactivity concentration near the evaporative concentration apparatus is below measurable limit in all three major nuclides (sampled on 20 December 2011) :I-134: 1.6X10-2Bq/cm3, Cs-134:2.9X10-2Bq/cm3, Cs-137:3.3X10-2Bq/cm3, and 6.0X10-1Bq/cm3 for all beta nuclides (sampled on 29 November 2011).) Water injection to the reactor is maintained by the ordinary reactor injection pump on the hill (A) and (C).

- Around 9:35am on 29 January 2012, an alarm on a system failure (Unit 4 SFP backup cooling system) was given in Unit 4 spent fuel pool backup cooling system. According to the site investigation, a pump (A) to circulate cooling water of a secondary system had been stopped and the water circulation was stopped accordingly (Fuel pool temperature at the time of the alarm: 21°C). After the event, we discovered cooling water leakage from A2 line of air-fin cooler unit (A1-A4 lines) of the A system of the secondary system. We confirmed that the water leakage was stopped by closing valve of the Unit A2 line. The cooling water is from a filtrate tank for fire extinction and doesn’t contain radioactive materials. The stopped secondary pump (A) was restarted at 11:14am and water cooling of the spent fuel pool was restarted accordingly (Fuel pool temperature at the time of cooling restart: 21°C)

Published: January 29th, 2012 at 7:47 pm ET
By
Email Article Email Article
9 comments

Related Posts

  1. Tepco: Frozen water ruptures pipes at Fukushima plant — Cooling system stops at Spent Fuel Pool No. 4 January 29, 2012
  2. Asahi: Now 7,800 liters leaked from ruptured pipes — Previous figure mentioned was 600 liters January 30, 2012
  3. Tepco Employee: What are they doing? Predicted that pipes would freeze causing water leakage — Now 23 points leaking — Tepco: “It’s hard to keep man power” January 31, 2012
  4. Jiji: 5 billion becquerels of beta radiation in 10 liters of decontaminated water — Includes strontium and cesium January 10, 2012
  5. Tepco: Strontium leaking into ocean — Tons more highly contaminated water enters sea — “TEPCO has apologized for the incident and says it will determine the cause and extent of the leakage” April 5, 2012

9 comments to Tepco: “Radioactively contaminated water” came from ruptured frozen pipes — Only cesium was removed — NHK had claimed no radioactivity

  • Please consider that free blogs are often published with 10′s of hours of work per week, only supported by advertisers on the website. If you are going to shop, use the links from the free sites that are of value to you.


    Report Comment

  • Bournemouth resident mystified by ‘blue sphere shower’

    The blue spheres are jelly-like but have no smell and are not sticky

    A man in Dorset has been left mystified after tiny blue spheres fell from the sky into his garden.
    Steve Hornsby from Bournemouth said the 3cm diameter balls came raining down late on Thursday afternoon during a hail storm.
    He found about a dozen of the balls in his garden. He said: “[They're] difficult to pick up, I had to get a spoon and flick them into a jam jar.”
    The Met Office said the jelly-like substance was “not meteorological”.
    Mr Hornsby, a former aircraft engineer, said: “The sky went a really dark yellow colour.
    Strange Blue Spheres Fall Over England 2012 VIDEO

    “As I walked outside to go to the garage there was an instant hail storm for a few seconds and I thought, ‘what’s that in the grass’?”
    ‘No smell’

    Mr Hornsby said he was keeping the balls in his fridge while he tried to find out what they were
    Walking around his garden he found many more blue spheres were scattered across the grass.
    He said: “The have an exterior shell with a softer inner but have no smell, aren’t sticky and do not melt.”
    Mr Hornsby said he was keeping the balls in his fridge while he tried to find out what they were.
    Josie Pegg, an applied science research assistant at Bournemouth University, speculated that the apparently strange phenomena might be “marine invertebrate eggs”.
    “These have been implicated in previous ‘strange goo’ incidents,” she said. “I’d have thought it’s a little early for spawning but I suppose we’ve had a very mild winter.
    “The transmission of eggs on birds’ feet is well documented and I guess if a bird was caught out in a storm this could be the cause.

    Sources:
    http://www.disclose.tv/action/viewvideo/87733/Strange_Blue_Spheres_Fall_Over_England_2012/
    http://www.bbc.co.uk/news/uk-england-dorset-16754531


    Report Comment

  • norbu norbu

    @Tacomagroove we have the same stuff here in northern california at the bottom of our peach trees. Not sure what it is.


    Report Comment

  • arclight arclight

    6.0X10-1Bq/cm3 for all beta nuclides

    Cs-137:3.3X106 -2Bq/cm3

    6 Bq/cm3 beta?

    0.3 Bq/cm3 cesium 137 ?


    Report Comment

  • Bleifrei Bleifrei

    How much water a day probably unmeasured expires
    full of nuclides. According to the information at the beginning (read the first article)
    I’ve tried to anticipate the day to cool consumption
    would that präfäktur, fully consistent with tanks, 20m ³ volume, any vacancy on the präfäktur Fuk – within 3 years (+1 j).

    provided that they begin to water at all


    Report Comment