JP2006078336A - 放射性物質除染方法および化学除染装置 - Google Patents
放射性物質除染方法および化学除染装置 Download PDFInfo
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- 230000003588 decontaminative effect Effects 0.000 claims abstract description 189
- 239000002253 acid Substances 0.000 claims abstract description 73
- 239000003513 alkali Substances 0.000 claims abstract description 49
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- 229910000031 sodium sesquicarbonate Inorganic materials 0.000 description 1
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- POWFTOSLLWLEBN-UHFFFAOYSA-N tetrasodium;silicate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-][Si]([O-])([O-])[O-] POWFTOSLLWLEBN-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
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Abstract
【解決手段】 原子力施設から発生する除染対象物を、アルカリ除染剤を用いるアルカリ除染工程と、有機酸および無機酸を組み合わせた酸除染剤を用いる酸除染工程とを組み合わせた除染処理に付すことを特徴とする放射性物質の除去方法並びにアルカリ除染剤を用いて除染を行うアルカリ除染槽、有機酸および無機酸を組み合わせた酸除染剤を用いて除染を行う酸除染槽、除染対象物を前記アルカリ除染槽と前記酸除染槽の間で移動させるための手段並びに使用後の前記アルカリ除染剤および酸除染剤を処理する廃液処理装置を具備する原子力施設から発生する除染対象物の化学除染装置。
【選択図】 図1
Description
有機溶剤除染、フレオン除染、ドライアイスブラスト除染
(2)塗膜汚染:
有機溶剤除染、ドライアイスブラスト除染、ドライブラスト除染、
高圧水ジェット除染
(3)塵埃汚染:
ドライアイスブラスト除染、ドライブラスト除染、高圧水ジェット除染
(4)酸化皮膜汚染:
強力化学除染、電解研磨除染、レドックス除染、超高圧ジェット除染、
ドライブラスト除染、
除染対象物を、酸除染槽20中に浸漬し、酸除染を行う。
(1)図6に概要を示す、除染槽(60リットル)中に振動撹拌機(400W、40Hz)と超音波振動子(900W、26KHz)を設けた試験装置を用い、種々の金属表面に付着した放射性物質が本発明方法で除去出来たかどうかを調査した。被験試料としては、放射性物質でその表面が10,000cpm程度にまで汚染された炭素鋼、ステンレス鋼、アルミニウム、銅の板等を、L300×W300×H100(mm)の大きさの除染槽に入るサイズに切断したものを用いた。また、この試験で用いたアルカリ除染液および酸除染液は、次の通りである。
ケイ酸ナトリウム 0.3%
ポリオキシエチレンオクチルエーテル 0.01%
酸 除 染 液:
シュウ酸 0.3%
硫 酸 1%
2……酸除染ユニット
3……水洗ユニット
4……廃液処理ユニット
5……クレーン
6……フック
7……クレーン用レール
10……アルカリ除染槽
11……電気ヒーター
12……超音波振動子
13……超振動撹拌機
14……逆洗型フィルター
15……逆洗用バッファ槽
16……移送ポンプ
20……酸除染槽
21……電気ヒーター
22……超振動撹拌子
23……カチオン樹脂塔
24……酸除染剤分解塔
25……交換型フィルター
26、27……移送ポンプ
28……再生廃液処理槽
30……水洗槽
31……混床樹脂塔
32……交換型フィルター
33……移送ポンプ
40……廃液処理槽
41……移送ポンプ
51……除染槽
52……除染カゴ
53……電気ヒーター
54……交換型ヒーター
55……イオン交換樹脂塔
56……超音波振動子
57……振動攪拌機
58……循環ポンプ
59……三方弁
A……アルカリ除染剤
B……酸除染剤
C……洗浄水
以 上
Claims (7)
- 原子力施設から発生する除染対象物を、アルカリ除染剤を用いるアルカリ除染工程と、有機酸および無機酸を組み合わせた酸除染剤を用いる酸除染工程とを組み合わせた除染処理に付すことを特徴とする放射性物質の除去方法。
- アルカリ除染剤を用いて除染を行うアルカリ除染槽、有機酸および無機酸を組み合わせた酸除染剤を用いて除染を行う酸除染槽、除染対象物を前記アルカリ除染槽と前記酸除染槽の間で移動させるための手段並びに使用後の前記アルカリ除染剤および酸除染剤を処理する廃液処理装置を具備することを特徴とする原子力施設から発生する除染対象物の化学除染装置。
- アルカリ除染槽が有機性汚染物を吸着するためのオイル吸着塔、固形分を除去するフィルターおよび除染液を加熱するヒータを有するものである請求項2に記載の化学除染装置。
- 更に、アルカリ除染槽が振動撹拌機および/または超音波振動子を有するものである請求項2または3記載の化学除染装置。
- アルカリ除染槽中の超音波振動子が、均一な超音波照射を可能とするための移動機能を有するものである請求項4に記載の化学除染装置。
- 酸除染槽が、放射能および重金属を除去するカチオン交換樹脂塔、固形分を除去するフィルター、酸除染剤中の有機酸を分解する触媒酸化分解塔および除染液を加熱するヒータを有するものである請求項2記載の化学除染装置。
- 更に、酸除染槽が振動撹拌機を有するものである請求項2または6に記載の化学除染装置。
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009175151A (ja) * | 2008-01-22 | 2009-08-06 | Electric Power Res Inst Inc | 超音波燃料洗浄の化学的向上 |
JP2013079884A (ja) * | 2011-10-04 | 2013-05-02 | Atsuo Nozaki | 汚染物質清掃装置及びこれを用いた汚染物質清掃制御システム |
JP2013224918A (ja) * | 2012-03-21 | 2013-10-31 | Mitsubishi Heavy Ind Ltd | 汚染物質の処理装置及び処理方法 |
JP2013250255A (ja) * | 2012-05-01 | 2013-12-12 | Mac Technical Systems Kk | 放射性物質の除染及び分離回収方法 |
JP2014035333A (ja) * | 2012-08-10 | 2014-02-24 | Shimizu Corp | 焼却灰の除染処理方法 |
JP2014132254A (ja) * | 2012-12-07 | 2014-07-17 | Kureha Trading Co Ltd | 放射性物質の除染方法 |
JP2015081898A (ja) * | 2013-10-24 | 2015-04-27 | 栗田工業株式会社 | 放射性廃イオン交換樹脂の除染方法および除染装置 |
JP2016506869A (ja) * | 2013-01-15 | 2016-03-07 | ローレンス リバモア ナショナル セキュリティー, エルエルシー | レーザー駆動の熱水処理 |
JP2016217892A (ja) * | 2015-05-21 | 2016-12-22 | 鹿島環境エンジニアリング株式会社 | 放射能汚染した金属材料の除染方法 |
JP2017187280A (ja) * | 2016-03-31 | 2017-10-12 | 三菱重工業株式会社 | 固形物除去方法 |
US10083769B2 (en) | 2013-10-24 | 2018-09-25 | Kurita Water Industries Ltd. | Treatment method and treatment apparatus of iron-group metal ion-containing liquid, method and apparatus for electrodepositing Co and Fe, and decontamination method and decontamination apparatus of radioactive waste ion exchange resin |
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Cited By (13)
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JP2009175151A (ja) * | 2008-01-22 | 2009-08-06 | Electric Power Res Inst Inc | 超音波燃料洗浄の化学的向上 |
EP2083425A3 (en) * | 2008-01-22 | 2015-08-12 | Electric Power Research Institute, Inc. | Chemical enhancement of ultrasonic fuel cleaning |
JP2013079884A (ja) * | 2011-10-04 | 2013-05-02 | Atsuo Nozaki | 汚染物質清掃装置及びこれを用いた汚染物質清掃制御システム |
JP2013224918A (ja) * | 2012-03-21 | 2013-10-31 | Mitsubishi Heavy Ind Ltd | 汚染物質の処理装置及び処理方法 |
JP2013250255A (ja) * | 2012-05-01 | 2013-12-12 | Mac Technical Systems Kk | 放射性物質の除染及び分離回収方法 |
JP2014035333A (ja) * | 2012-08-10 | 2014-02-24 | Shimizu Corp | 焼却灰の除染処理方法 |
JP2014132254A (ja) * | 2012-12-07 | 2014-07-17 | Kureha Trading Co Ltd | 放射性物質の除染方法 |
US11358237B2 (en) | 2013-01-15 | 2022-06-14 | Lawrence Livermore National Security, Llc | Laser-driven hydrothermal processing |
JP2016506869A (ja) * | 2013-01-15 | 2016-03-07 | ローレンス リバモア ナショナル セキュリティー, エルエルシー | レーザー駆動の熱水処理 |
JP2015081898A (ja) * | 2013-10-24 | 2015-04-27 | 栗田工業株式会社 | 放射性廃イオン交換樹脂の除染方法および除染装置 |
US10083769B2 (en) | 2013-10-24 | 2018-09-25 | Kurita Water Industries Ltd. | Treatment method and treatment apparatus of iron-group metal ion-containing liquid, method and apparatus for electrodepositing Co and Fe, and decontamination method and decontamination apparatus of radioactive waste ion exchange resin |
JP2016217892A (ja) * | 2015-05-21 | 2016-12-22 | 鹿島環境エンジニアリング株式会社 | 放射能汚染した金属材料の除染方法 |
JP2017187280A (ja) * | 2016-03-31 | 2017-10-12 | 三菱重工業株式会社 | 固形物除去方法 |
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