JAEA-Testing-2011-007.pdf:46.74MB - 日本原子力研究開発機構

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1. Introduction JAEA-Testing 2011-007 JAEA-Testing 2011-007 Radioactive materials released into the environment during the accident at the TEPCO Fukushima Daiichi Nuclear Power Plant due to the Great East Japan Earthquake were dispersed widely and precipitated in different areas. Swimming pools that children are awaiting opening in summer are not the exception. The radioactive materials in the swimming pool could be removed safely by processing the pool water according to correct treatment procedures based on knowledge obtained to date. The method we employed utilizes a mineral called zeolite and poly-aluminum chloride (PAC) as a flocculant, which are commonly used for processing water. Based on data and previous experience in decontamination tests of the swimming pool water using this flocculant, we determined the essential elements of the work flow and practical procedures, and compiled them as a guide for the decontamination of the swimming pool water. By following the procedures described and using materials and tools shown in this guide, teachers, parents or volunteers could decontaminate the swimming pool water, or private companies could establish a decontamination business. Thus, this guide has two major purposes: to serve as a manual for the steady step-by-step implementation of decontamination procedures of swimming pool water, and to make records that allow verification of what works and how correctly the work was completed, at a later stage. As adults, all of us will cooperate to allow children to return to the swimming pools – this is our desire. We prepared this guide with the hope that it will help those adults engaged in this work in the future. In presenting this guide, we also have a request to those of you using it. We compiled all of our knowledge and our experience into this document, realizing however, that this guide will not be complete. We would like to improve the guide with you. Please inform us anything you notice about the guide that could be changed or added to make it better. The figure below show a whole picture of work described in the guide, intending to - 98 98 -
JAEA-Testing 2011-007 JAEA-Testing 2011-007 show more clearly how the work should be done. ○Preparation Guide 2. What should be checked? 3. Preparation ○Treatment of pool water and precipitate Guide 4. Start procedures (1) – (8) Discharge Water compliant to the criteria for discharge ○Cleaning/clearance of the pool Guide4. Start procedures (9) – (10) ○Finishing Guide5. Final finishing Pool water Leaves on the bottom of pool 1st treatment (zeolite + flocculant) 2nd treatment (zeolite + flocculant) 3rd treatment (zeolite) Dilution - 99 99 - Filtration of precipitate Filtrated water Recovered precipitate Temporary storage
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本レポートは独立行政法
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JAEA-Testing 2011-007 Guide for Dec
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近藤伸次福島技術本部
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菅野良信がんばろう福島
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JAEA-Testing 2011-007 JAEA-Testing
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3.準備をします JAEA-Testing 2
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「記録-1 作業開始前のプ
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「記録-3 (作業開始前)作業
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「記録-5 作業スケジュー
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Page 70 and 71: 「記録-15 ろ布によるろ過
Page 78 and 79: 「記録-18 廃棄物の一時保
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Record 13: Radioactivity concentrat
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Record 14: Radioactivity concentrat
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(9) Clean the swimming pool wall JA
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5. Final finishing JAEA-Testing 201
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Record 19: Ambient dose rate map at
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(2) Review the entire work JAEA-Tes
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6. References JAEA-Testing 2011-007
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国際単位系(SI) 国際単位系
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JAEA-Testing-2011-007.pdf:46.74MB - 日本原子力研究開発機構

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