#TEPCO Daily Status Report 2016-04-08

About the situation of the Fukushima Daiichi Nuclear Power Station (Daily) [3 pm]

2016 April 8, Tokyo Electric Power Holdings

April 8 was not to check the accumulated water level data of 7 am, miscellaneous solid waste volume reduction processing (below, HTI) because it has been confirmed that the accumulated water level of the building has risen to 2,861㎜, miscellaneous solid waste volume reduction processing building of the accumulated water operation on the limitation of the water level “TP2 to the provisions of Table 26-1 of the 7:00 am 50 minutes implementation plan III Part 1: Article 26,” stagnant water that accumulated in the building “, determined that 754㎜ less “not be satisfied.

It should be noted, was to compare the water level of the building and the surrounding Sabudoren of 7 o’clock time, higher in the water level of the peripheral Sabudoren, water level difference after the building water level correction, it was confirmed that there 3,909㎜.

The second cesium adsorption apparatus started to 7 hour 59 minutes, started the accumulated water drawdown operation of the building.

Down miscellaneous solid waste in 40 minutes 8:00 accumulated water level of volume processing building and it was confirmed that there is a downward trend.

Accumulated water level of the high-temperature incinerator building is, by the start of the second cesium adsorption apparatus, was lowered to “TP2,662mm” in 2:00 pm now. From the fact that then drops is continuing, implementation plan III Part 1: Article 26 restrictions on the operation of the accumulated water level of the High Temperature Incinerator Building to the provisions of Table 26-1 of the “accumulated water to be stored in the building,” “TP2 , it was confirmed that satisfies the 754mm or less “. For this reason, it was determined to return to operation on within the limits set forth in the Plan of Implementation III Article 26 Part 1: at 2:30 pm.

It should be noted, was to stop the accumulated water transfer to the High Temperature Incinerator Building from each building, the residence from the fact that the water level rise of the high-temperature incinerator building has stopped, by accumulated water transfer from each of the buildings that have been pre-planned to the High Temperature Incinerator Building water level has been determined that the rose.

Accumulated water transfer plan from each building to the high-temperature incinerator building is, it had been prepared based on the premise of the continuous operation of the second cesium adsorption apparatus for processing the accumulated water of high temperature incinerator building, the second cesium adsorption device, control is under trial operation after the system inspection, at the time you start the accumulated water transfer from each of the building yesterday, rising from the fact that the second cesium adsorption apparatus has been stopped, the accumulated water level of the high-temperature incinerator building plans more as the estimates were.

“Water treatment facilities and the status of storage facilities”

  • cesium adsorption apparatus during operation
    and second cesium adsorption apparatus (Surrey)during operation
  • RO desalination equipment during operation
    and multi-nuclide removal equipment (ALPS)stopped
    or expand multi-nuclide removal equipment stop in
  • high-performance multi-nuclide removal equipment stopped
  • in mobile type strontium removal device stop
    and second mobile type strontium removal device stopped

“Sabudoren situation of other water treatment facilities”

※ Sabudoren for other water treatment facilities, the analysis result of the temporary water storage tank E [taken Date March 31, 2008], make sure that you are satisfied with the operational target value. April 7, the start of the drainage to 9:00 am 50 minutes from the harbor within. It is to be noted that the drainage situation, make sure that there is no abnormality of at or leakage on the same day at 10 am. Then, stop the drainage in at 2:46 pm. Ensure that there is no abnormality in the drainage stopped state. Drainage amount of 721M^3.

※ Sabudoren for other water treatment facilities, analysis of the results [the day of collection April 1] of the temporary water storage tank F, make sure that you are satisfied with the operational target value. April 8 start the drainage to 10:00 am 3 minutes from the harbor within. It is to be noted that the drainage situation, make sure that there is no abnormality of the leakage and the like on the same day at 10 am 22 minutes. Then, stop the drainage to the 2 hour 36 minutes in the afternoon. Ensure that there is no abnormality in the drainage stopped state. Drainage amount of 665M^3

Sabudoren for other water treatment facilities, analysis of the results [the day of collection April 4] of the temporary water storage tank G, make sure that you are satisfied with the operational target value.

“The situation of underground water bypass”

No change reported

“The situation of underground water storage tank”

but in ※ 7 January 2013 contaminated water of the underground water storage tank has been completed all transfer, diffusion prevention measures and sampling (the drain of the underground water storage tank No.1 ~ 7 Anna Sui, leak detection hole water in the underground water storage tank No.1 ~ 4,6,7, underground water storage tank observation hole, underground water bypass investigation hole, sea side observation hole) is ongoing implementation.

{Diffusion prevention measures}
leakage water to leak detection within the pores of the underground water storage tank No.1 ~ 3 to the temporary above ground tank, the underground water storage tank in the water that has leaked into the drain hole of the underground water storage tank No.1,2 appropriate implementation in action to transfer to.

{Latest sampling results}
collected underground water storage tank observation hole in the April 6, underground water storage tank drain hole, the result of analysis of the water in the underground water storage tank leak detection hole, underground water storage tank i (leakage detection hole water) southwest side make sure that all beta radioactivity, with respect to the previous value (March 30, collected) 87Bq / L, has risen to 8,100 Bq / L of. Other analysis, significant variation has not been confirmed.

April 7, for the leak detection hole and underground water storage tank observation hole, drain hole of its surrounding, carry out the sampling and analysis of the sample.

Continue to strengthen the monitoring for underground water storage tank observation hole, continue to investigate the cause of all beta radioactivity rises. Analysis of the total beta radioactivity in water April 7 days collected underground water storage tank observation hole, significant changes as compared to the previous value (April 5 taken) is not confirmed.

For even all beta radioactivity of the water that has collected and analyzed from the sea side observation hole located on the east side (ocean side) of the underground water storage tank observation hole, significant changes in comparison with the previous value has not been confirmed.

In addition, the matter that was raised of the total beta radioactivity in underground water storage tank i (leakage detection hole water) southwest side, underground water storage tank was taken on April 7, i (leakage detection hole water) southwest side, underground water storage tank i ( drain Anna Sui) southwest side, the results of the analysis of all beta radioactivity are as follows in the water of the underground water storage tank observation holes in the vicinity of the (A17).

And underground water storage tank i (leakage detection hole water) southwest side Bq 9,300 / L (the previous value (April 6 collected) 8,100 Bq / L)

and underground water storage tank i (drain Anna Sui) less than the southwest side of the limit of detection (24Bq / L) (the previous value (March 25, collected) less than the detection limit (20Bq / L))

underground water storage tank observation hole (A17) below the limit of detection (26Bq / L) (the previous value (April 6 collected) 43Bq / L)

also for tritium analysis results in the April 6, collected underground water storage tank i (leakage detection hole water) southwest side of the water, compared to the previous value (March 2, collected) less than the detection limit, and 3,100Bq / L make sure that you are rising.

Underground water storage tank was taken on April 7, i (drain Anna Sui) southwest side, since there is no variation in the measurement results of other observation holes and the sea side observation hole, impact on the surrounding environment is thought that there is no .

In addition, underground water storage tank i (leakage detection hole water) southwest side for the time being every day, underground water storage tank i (drain Anna Sui) southwest side to continue the sampling of once a week. Continue to strengthen the monitoring for underground water storage tank observation hole, continue to investigate the cause of all beta radioactivity rises.

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