ᮾᛴᘓタᢏ⾡◊✲ᡤሗ No.39
東急建設技術研究所報No.39

U.D.C 614.7
U.D.C 614.7

 ㌴㍕ᆺỈฎ⌮⿦⨨䛻䜘䜛ᨺᑕᛶ≀㉁䛾㝖ཤᢏ⾡ 
車載型水処理装置による放射性物質の除去技術
㸫7$5'6 ࡟ࡼࡿ㜵ⅆỈᵴ㝖ᰁ㸫㻌− TARDS による防火水槽除染−椿㸨 ᳺ ＊㞞ಇ㸨 ᰘ㔝 ୍๎＊

雅俊

柴野一則

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せ ⣙㸸  ㌴㍕ᆺỈฎ⌮⿦⨨ࢆ⏝࠸ࡓ TARDS㸦Tokyu Amanasuͤ㸯 Radiation Decontamination System㸧ࡣ㸪㈓Ỉᵴ㸪ࣉ࣮ࣝ➼ࡢᑠつᶍ࡞Ỉᵴࡢᗏ㒊࡟ሁ✚ࡋࡓᅵ⢏Ꮚ࡞࡝࡟ྵࡲࢀࡓᨺᑕᛶ≀㉁ࢆจ㞟ỿẊฎ⌮࡟ࡼࡗ࡚㝖ཤࡍࡿᢏ⾡࡛࠶ࡿࠋỈฎ⌮ࡣసᴗဨࡀởᰁ≀㉁࡟᥋ゐࡍࡿࡇ࡜ࡀᑡ࡞ࡃ㸪จ㞟ࡋࡓởἾࢆ⬺Ỉࡍࡿࡇ࡜࡟ࡼࡾ㸪Ỉ୰ࡢᨺᑕᛶ≀㉁ࡢ⃰ᗘࢆపῶࡍࡿࡶࡢ࡛࠶ࡿࠋTARDSࡣ⚟ᓥ┴ࡢᖹᡂ 24 ᖺᗘ➨ 1 ᅇ㝖ᰁᢏ⾡ᐇド஦ᴗ࡟ࠕ㌴㍕ᆺỈฎ⌮⿦⨨ࠖ࡜ࡋ࡚᥇ᢥࡉࢀ㸪⚟ᓥᕷෆࡢ㜵ⅆỈᵴ࡟࠾࠸࡚㝖ᰁᐇドᐇ㦂ࢆᐇ᪋ࡋࡓࠋᐇドᐇ㦂ࢆ⾜ࡗࡓ⤖ᯝ㸪 ᪥㛫ࡢฎ⌮㐠㌿࡛ฎ⌮Ỉࡢᨺᑕ⬟⃰ᗘࡣ᤼Ỉᇶ‽ࢆ༑ศ‶㊊ࡋ࡚࠸ࡓࠋ
ͤ1Amanasu ࡣ⿦⨨ࢆᮾᛴᘓタ࡜ඹྠ࡛㛤Ⓨࡋࡓࠕ࢔࣐ࢼࢫ┿࿴(ᰴ)ࠖࢆ♧ࡋ࡚࠸ࡿࠋ
㺕㺎㺺㺎㺢㺼㸸  ᨺᑕ⬟ởᰁ㸪㝖ᰁ㸪㌴㍕ᆺ⿦⨨㸪จ㞟ỿẊฎ⌮㸪ᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈┠ ḟ㸸ࡣࡌࡵ࡟     7$5'6 ᕤἲ     㜵ⅆỈᵴ࡟࠾ࡅࡿỈί໬ᐇドᐇ㦂     ࠾ࢃࡾ࡟

 7$5'6

 ࡣࡌࡵ࡟

 ᴫせᖹᡂ 23 ᖺ 3 ᭶ࡢᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈࡟ࡼࡾ㸪ᮾி㟁ຊ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ࡛኱つᶍ࡞஦ᨾࡀⓎ⏕ࡋࡓࠋ஦ᨾ࡟ࡼࡗTARDS ࡣ㸪ࢮ࢜ࣛ࢖ࢺ྾╔ᮦ࡜จ㞟๣ࢆ⏝࠸࡚จ㞟ỿẊࡉ࡚኱㔞ࡢᨺᑕᛶ≀㉁ࡀ኱Ẽ୰࡟ᨺฟࡉࢀ㸪⚟ᓥ┴ࢆ୰ᚰ࡟ᗈࡏ㸪Ⓨ⏕ࡋࡓởἾࢆᑠつᶍ࡞⿦⨨࡛▷᫬㛫࡟ฎ⌮ࡋ㸪ᨺᑕᛶ⠊ᅖࡢᆅᇦࡢᨺᑕ⬟ởᰁࢆᘬࡁ㉳ࡇࡋࡓࠋࡇࢀࢆཷࡅ࡚㸪ᐙ≀㉁ࢆởᰁỈ࠿ࡽศ㞳ࡍࡿỈฎ⌮᪉ἲ࡛࠶ࡿࠋTARDS ࡢᴫせᒇ㸪㐨㊰ཬࡧ㎰ᆅ࡞࡝ࢆᑐ㇟࡜ࡋ࡚㝖ᰁసᴗࡀ㐍ࡵࡽࢀ࡚࠸

ࡣᅗ 1 ࡢ࡜࠾ࡾ࡛࠶ࡿࠋࡿࠋࡋ࠿ࡋ㸪㜵ⅆỈᵴࡸࣉ࣮ࣝ➼ࡢ㈓Ỉᵴ࡟⁫␃ࡋ࡚࠸ࡿᨺᑕᛶ≀㉁࡟ࡘ࠸࡚ࡣ㸪㝖ᰁࡀᡭࡘ࠿ࡎࡢ≧ែ࡛࠶ࡿࠋࡑࡢ⌮⏤ࡣ㸪㈓␃ᵴෆࡢỈࡀᨺᑕᛶ≀㉁ࢆ㐽ⶸࡍࡿຠᯝࢆ᭷ࡋ࡚࠸ࡿࡓࡵ㸪ᙜ㠃ࡣእ㒊ࡢ⎔ቃ࡟ᝏᙳ㡪ࢆ୚࠼ࡿ⏽ࢀࡀᑠࡉ࠸࡜

ุ᩿ࡉࢀࡓࡓࡵ࡛࠶ࡿࠋ୍᪉㸪ⅆ஦࡟ᑐࡋ࡚㸪㈓␃Ỉࢆ฼⏝ࡍࡿࡓࡵ࡟ࡣ㸪ࡇ࠺ࡋࡓ㜵ⅆỈᵴࡸࣉ࣮ࣝ࡞࡝ࡢ㝖ᰁࡀᚲせ࡛࠶ࡿࠋͤ㸯㌴㍕ᆺỈฎ⌮⿦⨨ࢆ⏝࠸ࡓ TARDS㸦Tokyu Amanasu

Radiation Decontamination System㸧ࡣ㸪㈓Ỉᵴ㸪බᅬụཬࡧ㐟ᡙ⏝ࣉ࣮ࣝ➼ࡢẚ㍑ⓗᑠつᶍ࡞㈓Ỉᵴࡢᗏ㒊࡟ሁ✚ࡋࡓ⸴㢮㸪Ỉ⏕᳜≀ཬࡧᚤ⣽ᅵ⢏Ꮚ࡞࡝࡟ྵࡲࢀࡓᨺᑕᛶ≀㉁ࢆᚠ⎔ᘧᅗ  7$5'6 ࡢᴫせỈฎ⌮࡟ࡼࡾ㝖ཤࡍࡿᢏ⾡࡛࠶ࡿࠋᚠ⎔ᘧỈฎ⌮ࡣసᴗဨࡀỈฎ⌮ࡢᡭ㡰ࢆ௨ୗ࡟♧ࡍࠋởᰁ≀㉁࡟᥋ゐࡍࡿࡇ࡜ࡀᑡ࡞ࡃ㸪ฎ⌮ࡢసᴗᛶࢆྥୖࡋ㸪ձ Ỉᵴෆࡢሁ✚ởἾࡸᗏ㠃࡟௜╔ࡋ࡚࠸ࡿ⸴㢮➼ࢆ᧠ᢾࡋจ㞟ࡋࡓởἾࢆ⬺Ỉࡍࡿࡇ࡜࡟ࡼࡾ㸪ᗫᲠ≀㔞ࢆῶᐜ໬ࡍࡿࡓởᰁỈࢆỈ୰࣏ࣥࣉ࡛ΰ࿴ᵴ࡟㏦ࡿࠋᢏ⾡࡛࠶ࡿࠋࡲࡓ㸪ཎỈࡸฎ⌮Ỉࢆ୍ḟಖ⟶ࡍࡿ௬タỈᵴࡀ୙せࡢࡓࡵ㸪⊃࠸ሙᡤ࡛ࡢసᴗࡀྍ⬟࡛࠶ࡾฎ⌮㈝⏝ࡶపᗮղ ởᰁỈ࡜ࢮ࢜ࣛ࢖ࢺ྾╔ᮦ㸪จ㞟๣࡜ΰྜᵴ࡛ΰྜࡍࡿࠋ࡛࠶ࡿࠋճ จ㞟ᵴ࡛ởἾࡸᨺᑕᛶ≀㉁ࢆࣇࣟࢵࢡ≧࡟ࡍࡿࠋTARDS ࡣ⚟ᓥ┴ࡢᖹᡂ 24 ᖺᗘ➨ 1 ᅇ㝖ᰁᢏ⾡ᐇド஦ᴗ࡟մ ࣇࣟࢵࢡ≧࡟࡞ࡗࡓỿẊ≀ࢆ୍ḟỿẊࢁ㐣ฎ⌮ᵴ࡛ᅛᾮࠕ㌴㍕ᆺỈฎ⌮⿦⨨ࠖ࡜ࡋ࡚᥇ᢥࡉࢀ㸪ᖹᡂ 24 ᖺ 8 ᭶㸪⚟ᓥศ㞳ࡍࡿࠋᕷෆࡢ㜵ⅆỈᵴ࡟࠾࠸࡚㝖ᰁᐇドᐇ㦂ࢆᐇ᪋ࡋࡓࠋᮏ✏࡛ࡣյ ஧ḟỿẊࢁ㐣ฎ⌮ᵴ࡟࠾࠸࡚ᅛᾮศ㞳ࡋ㸪ࢁ㐣ࡉࢀࡓฎࡇࡢᐇドᐇ㦂ࡢ⤖ᯝ࡟ࡘ࠸࡚⤂௓ࡍࡿࠋ⌮Ỉࡣ᤼Ỉᇶ‽⃰ᗘ௨ୗ࡟࡞ࡿࡲ࡛ཎỈᵴ࡬㏉㏦ࡋ㸪ᚠ⎔ࡋ࡞ࡀࡽỈฎ⌮ࢆ⾜࠺ࠋն ởἾࡣ⬺Ỉ⿦⨨࡛⬺Ỉࡋࡓࡢࡕ኱ᆺᅵࡢ࠺➼࡟ධࢀ௬⨨ሙ࡞࡝࡛ಖ⟶ࡍࡿࠋ* 土木本部 環境技術部

ᅵᮌᮏ㒊 ⎔ቃᢏ⾡㒊
89
89

東急建設技術研究所報No.39

 ≉㛗⾲  ᐇドᐇ㦂⿦⨨ࡢᴫせTARDS ࡟ࡼࡿจ㞟ỿẊࡣ⾪ᧁᘧจ㞟ỿẊ᪉ᘧࢆ᥇⏝ࡋ࡚࠾ࡾ㸪ᚑ᮶ᢏ⾡࡜ẚ㍑ࡋ࡚⿦⨨ࡀᑠつᶍ࡛࠶ࡿࡓࡵ㸪4 ࢺࣥࢺࣛࢵࢡ⛬ᗘࡢ㌴୧࡟✚㍕ྍ⬟࡛࠶ࡿࠋࡲࡓจ㞟ỿẊ཯ᛂࡶ㏿ࡃ㸪⣙ 20m3/hr ࡢỈฎ⌮ࡀྍ⬟࡛࠶ࡿࠋTARDS ࡢ୺࡞≉㛗ࡣ௨ୗࡢ࡜࠾ࡾ࡛࠶ࡿࠋ
ձ ㌴㍕ᆺί໬⿦⨨㸦จ㞟㸩ί໬㸩⬺ỈởἾฎ⌮㸧ࡣᑠつᶍ࡛࠶ࡿ㸦ᚑ᮶ᕤἲࡢ 1/5 ⛬ᗘ㸧ࠋղ Ỉᵴෆࢆ᧠ᢾࡍࡿࡓࡵሁ✚ởἾ㸪ᗏ㠃࡟௜╔ࡋ࡚࠸ࡿ⸴ඨ৯ਯக૟અಎ઼࿡১‫ق‬P‫ك‬¼ॺথॺছॵॡ෰઎એ஋ಎ઼ಚથએ஋‫ق‬P‫ك‬ॺথॺছॵॡಎ઼੎୤‫ॺق‬থ‫ك‬଎ાਗ਼ৡ‫ق‬N:‫ك‬๐਷৷এথউ઎૪৶ચৡ‫ق‬WKU‫ك‬਷૪৶࿯୭৚ँञॉᮏᐇ㦂ࡢỈฎ⌮㐠㌿᫬㛫ࡣ 12 ᫬㛫㸦6 ᫬㛫/᪥2 ᪥㸧࡛ᐇ㢮➼ࢆྠ᫬࡟㝖ཤࡍࡿࡇ࡜ࡀ࡛ࡁࡿࠋ

᪋ࡋ㸪Ỉฎ⌮ᚠ⎔ᅇᩘࡣ 6 ᅇ࡛࠶ࡗࡓࠋճ ᚑ᮶ࡢࣂࢵࢳᘧ⿦⨨࡜㐪࠸㸪㐃⥆ⓗ࡟ᚠ⎔㐠㌿ࡀྍ⬟࡛࠶ࡿࠋմ వ๫ởἾࡢฎ⌮ࡣᑠᆺ⬺Ỉ⿦⨨ࢆ౑⏝ࡍࡿࡓࡵࣇ࢕ࣝࢱ࣮ࣉࣞࢫ➼ࡢ኱ᆺタഛࡀ୙せ࡛࠶ࡿࠋյ ฎ⌮㔞㸪⃮ᗘ㸪✵㛫⥺㔞⋡➼ࡢᖖ᫬ィ ࡀྍ⬟࡛࠶ࡿࠋն ᚠ⎔㐠㌿ࡢࡓࡵฎ⌮Ỉ➼ࢆ୍ḟಖ⟶ࡍࡿ௬タỈᵴࡀ୙せ࡛࠶ࡿࠋ෗┿ 1 ࡟ฎ⌮⿦⨨ࡢ≧ἣࢆ♧ࡍࠋᅗ 㻌 ᐇ㦂⿦⨨㓄⨨ᖹ㠃ᅗ෗┿  7$5'6 ㌴㍕≧ἣ 㜵ⅆỈᵴ䛻䛚䛡䜛Ỉί໬ᐇドᐇ㦂 ᐇドᐇ㦂ࡢᴫせ⚟ᓥᕷෆࡢ㜵ⅆỈᵴ࡟࠾࠸࡚㸪ᖹᡂ 24 ᖺ 8 ᭶ 21 ᪥㹼24 ᪥෗┿  Ỉฎ⌮⿦⨨ࡢ㌴㍕≧ἣ࡟࠿ࡅ࡚ TARDS ࡟ࡼࡿỈฎ⌮ᐇドᐇ㦂ࢆᐇ᪋ࡋࡓࠋ
ᐇ㦂࡛ࡣ㸪1 ᪥ 6 ᫬㛫ࡢᚠ⎔ฎ⌮ࢆ㸰᪥㛫⾜ࡗࡓࠋཎỈཬࡧฎ⌮Ỉ࡟ࡘ࠸࡚ 2 ᫬㛫ẖ࡟ヨᩱࢆ᥇Ỉࡋ㸪Ỉ㉁ศᯒ࡟ࡼࡾ
ί໬ຠᯝࢆ☜ㄆࡋࡓࠋỈ㉁ศᯒࡣヨᩱ୰ࡢࢭࢩ࣒࢘ 134
㸦134Cs㸧࡜ࢭࢩ࣒࢘ 137㸦137Cs㸧ࢆ ᐃࡋ㸪᤼Ỉᇶ‽࡛࠶ࡿ⃰ᗘ㝈ᗘ㸦(134Cs/60)+( 137Cs/90)㸧࡟ࡼࡗ࡚ホ౯ࡋࡓࠋจ㞟ỿẊ࡟ࡼࡾฎ⌮ࡋࡓỈࡣ⃰ᗘ㝈ᗘࡀ᤼Ỉᇶ‽್ 1 ௨ୗ࡛࠶ࡿࡇ࡜ࢆ☜ㄆࡋࡓࡢࡕᨺὶࡋࡓࠋởἾ࡟ࡘ࠸࡚ࡣ㸪⬺Ỉᚋ࡟኱ᆺᅵࡢ࠺࡟ワ㎸ࡳ㸪஦ᴗ⪅࡛࠶ࡿ⚟ᓥ┴ࡢᣦᐃࡋࡓ௬
⨨ࡁሙ࡟㐠ᦙࡋಖ⟶ࡋࡓࠋ
⾲ 1 ࡟ᐇ㦂⿦⨨ࡢ௙ᵝ㸪ᅗ 2 ࡟⿦⨨㓄⨨ᅗ㸪෗┿ 2 ࡟Ỉฎ⌮⿦⨨ࡢ㌴㍕≧ἣ㸪෗┿ 3 ࡟ᐇ㦂≧ἣࢆ♧ࡍࠋ෗┿  㜵ⅆỈᵴࡢ㝖ᰁᐇ㦂≧ἣ


90

東急建設技術研究所報No.39

 ᐇドᐇ㦂⤖ᯝࡋ࡚࠸ࡿᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢᇶ‽್௨ୗ࡜࡞ࡿࡢࡣ㸪ᴫࡡᐇ㦂㛤ጞ๓ࡢ㜵ⅆỈᵴෆࡢཎỈཬࡧจ㞟ỿẊฎ⌮ᚋࡢฎ

SSࡀ70mg/L௨ୗ࡛࠶ࡿࡇ࡜ࡀ☜ㄆ࡛ࡁࡓࠋࡇࢀ࡟ࡼࡾ㸪Ỉฎ⌮Ỉࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢ ᐃ⤖ᯝࢆ⾲ 2㸪ࡲࡓⓎ⏕ở⌮㐠㌿᫬࡟࠾࠸࡚SSࢆ⟶⌮ࡍࡿࡇ࡜࡛ฎ⌮Ỉ୰ࡢ࠾࠾ࡼࡑࡢἾཬࡧⓎ⏕ởἾࡢ⤠ࡾỈࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢ ᐃ⤖ᯝᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࢆᢕᥱ࡛ࡁࡿ࡜⪃࠼ࡽࢀࡿࠋ

12.00
ᨺᑕᛶ䝉䝅䜴䝮⃰ᗘ㝈ᗘ㻔㻯㼟㻝㻟㻠㻛㻢㻜㻕㻗㻔㻯㼟㻝㻟㻣㻛㻥㻜㻕䠄㻙䠅ࢆ⾲ 3 ࡟♧ࡍࠋ㛤ጞ 1 ᪥┠ࡢ 2 ᫬㛫ᚋࡢཎỈ⃰ᗘࡀୖ᪼ࡋ࡚࠸ࡿࠋࡇࢀ
ࡣ㸪ึᮇ࡟タ⨨ࡋࡓ⤥Ỉ࣏ࣥࣉࡢ఩⨨ࢆኚ࠼ࡓࡇ࡜㸪ᨩᢾ⏝࣏ࣥࣉࡢ఩⨨ࢆኚ໬ࡉࡏࡓࡓࡵ࡛࠶ࡿࠋ1 ᪥┠ࡢ 6 ᫬㛫ᚋ࡟࠾࠸࡚ࡣ㸪ᑐὶࡋ࡚࠸ࡿཎỈ⃰ᗘࡶప⃰ᗘ࡜࡞ࡗࡓࠋ
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2 ᪥┠ࡢ㛤ጞ┤ᚋࡣ㸪⤥Ỉ࣏ࣥࣉࡢ࿘㎶࡟࠶ࡿᗏἾࢆᛴ
⃭࡟྾㎸ࢇࡔࡓࡵ㸪୍᫬ⓗ࡟㧗࠸ᨺᑕ⬟⃰ᗘ࡜࡞ࡗࡓࡀ㸪ࡑࡢᚋ㸪ᑐὶࡋ࡚࠸ࡿཎỈࡢ⃰ᗘࡣ 2 ᫬㛫ᚋ࡛ᛴ⃭࡟ῶᑡ

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y=0.0173xͲ 0.1896
R²=0.99

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0.000ࡋ㸪ࡑࡢᚋ㸪Ᏻᐃࡋࡓ್࡜࡞ࡗࡓࠋ

5001000ฎ⌮Ỉࡣ㸪1 ᪥┠࡜ྠᵝ࡟㛤ጞ┤ᚋ࠿ࡽ Cs134,Cs137 ࡜ᾋ㐟≀㉁⃰ᗘ䠄㻿㻿䠅㻔㼙㼓㻛㼘㻕

ࡶ࡟ 2Bq/L ᮍ‶ࢆ♧ࡋ㸪᤼Ỉ୰ࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢᇶᅗ ≀㉁⃰ᗘ࡜ᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢ┦㛵㛵ಀ‽ ್ ࡛ ࠶ ࡿ ᨺ ᑕ ᛶ ࢭ ࢩ ࢘ ࣒ ⃰ ᗘ 㝈 ᗘ 㸦 Cs134/60 㸩 ᐇドᐇ㦂ࡢࡲ࡜ࡵ

Cs137/90ӌ1㸧ࢆ༑ศ‶㊊ࡋ࡚࠸ࡓࠋ⾲ ཎỈཬࡧฎ⌮Ỉࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘ૪৶঩

૪৶ৎ৑‫ڬ‬ৎ৑‫ڮ‬ৎ৑‫ڭ‬঩৯‫ڰ‬ৎ৑
‫ڲ‬ৎ৑
‫ڬ‬ৎ৑
‫ڮ‬ৎ৑
‫ڮ‬঩৯
‫ڰ‬ৎ৑
‫ڲ‬ৎ৑

7$5'6 ࡢᐇドᐇ㦂ࢆ⾜ࡗࡓ⤖ᯝ㸪 ᪥㛫㸦 ᪥  ᫬㛫㸧ࡢ㐃ਉ਷ଣೝਙ७३क़঒෯২‫ق‬%T/૪৶਷ଣೝਙ७३क़঒෯২‫ق‬%T/&V&V&V&V

&V⥆✌ാ୰ࡢฎ⌮Ỉ୰ࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡣ &V㸪&V ࡜ࡶ࡟ %T/ ᮍ‶࡛࠶ࡾ㸪᤼Ỉ୰ࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢᇶ‽

&V&V

&V್ࢆ༑ศ‶㊊ࡋ࡚࠸ࡓࠋ㜵ⅆỈᵴࢆᑐ㇟࡜ࡋࡓỈฎ⌮⿦⨨ࡢ㐃⥆✌ാࡢᏳᐃᛶࡣ༑ศ☜ㄆ࡛ࡁࡓࠋỈ୰࣏ࣥࣉ➼࡛㜵ⅆỈᵴෆࢆ᧠ᢾࡍࡿࡇ࡜࡟ࡼࡾᕳࡁୖࡆࡽࢀࡿ⢏Ꮚࡣ㸪ᮏ⿦⨨࡛☜ᐇ࡟ྲྀࡾ㝖ࡃࡇ࡜ࡀ࡛ࡁ㸪㏱どᗘࡶྥୖࡋ࡚࠸ࡓࠋࡋ࠿ࡋ㸪㜵ⅆỈᵴࡢ㝖ᰁ࡜ࡋ࡚ࡣ㸪ᑡ㔞ࡢᗏἾࡀṧ␃ࡋ࡚࠸ࡿࡇ࡜ࡀ☜ㄆࡉࢀ࡚࠾ࡾ㸪௒ᅇ౑⏝ࡋࡓỈ⾲  ởἾཬࡧởἾ⤠ࡾỈࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘළာ૪৶঩୰࣏ࣥࣉࡔࡅ࡛ࡣ᏶඲࡟ᨩᢾࡍࡿࡇ࡜ࡀ࡛ࡁ࡞࠿ࡗࡓࠋࡲࡓ㸪Ⓨ⏕ࡋࡓởἾࢆ⬺Ỉࡍࡿᕤ⛬࡟࠾࠸࡚ࡶసᴗဨࡢᏳ඲ᛶ࡜࠸ළာ๮ॉ਷ଣೝਙ७३क़঒෯২‫ق‬%T/ଣೝਙ७३क़঒෯২‫ق‬%T/

&V&V‫ڭ‬঩৯‫ڮ‬঩৯

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&V&V

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&V&V

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&V&V

࠺Ⅼ࡛ㄢ㢟ࡀṧࡗࡓࠋ ᐇドᐇ㦂࡛⏕ࡌࡓㄢ㢟ᐇ㦂⤖ᯝࡼࡾ௨ୗࡢㄢ㢟ࡀ⏕ࡌࡓձ 㜵ⅆỈᵴෆࡢᗏ㒊࡟ሁ✚ࡋࡓởἾ࡜Ỉ࡜ࢆຠ⋡ࡼࡃ᧠ᢾᮏᐇドᐇ㦂࡟࠾࠸࡚㸪ཎỈ㸦<4㹼840Bq/L㸧ࢆỈฎ⌮⿦⨨ࡍࡿᚲせࡀ࠶ࡿࠋ࡟ࡼࡾฎ⌮ࡋࡓ⤖ᯝ㸪ᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡣ࠾࠾ࡴࡡබᐃศղ ᑡ㔞ࡢởἾࢆᏳ඲࡟⬺Ỉࡍࡿᚲせࡀ࠶ࡿࠋᯒࡢ᳨ฟ㝈⏺್௨ୗࡲ࡛పῶࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋࡲࡓ㸪จ㞟⌧ᅾ㸪 Ⅼࡢㄢ㢟࡟ᑐฎࡍ࡭ࡃᨩᢾ⿦⨨࠾ࡼࡧᑠᆺ⬺Ỉ⿦ỿẊ࡟ࡼࡾⓎ⏕ࡋࡓవ๫ởἾࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡣᐇ㦂1᪥⨨ࡢ㛤Ⓨࢆ⾜ࡗ࡚࠸ࡿࠋ

┠ࡀ5,500Bq/kg࡛࠶ࡗࡓࡀ㸪2᪥┠࡟ࡣ930Bq/kg࡜࡞ࡾ㸪5ศࡢ1࡟పୗࡋࡓࠋవ๫ởἾࢆ⬺Ỉࡍࡿ㝿࡟Ⓨ⏕ࡋࡓ⤠ࡾỈ࠿ࡽࡣ 䛚䜟䜚䛻

ᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡣ᳨ฟࡉࢀࡎ㸪వ๫ởἾ࠿ࡽỈ࡬ࡢࢭࢩ㜵ⅆỈᵴࡸࣉ࣮ࣝ࡜࠸ࡗࡓᑠつᶍ࡞㈓Ỉ᪋タࡢ㝖ᰁࡣ㸪࡯࣒࢘ࡢ⛣⾜ࡣ࡞࠿ࡗࡓࠋ࡜ࢇ࡝㐍ᒎࡋ࡚࠸࡞࠸ࠋࡋ࠿ࡋ㸪౛࠼ࡤ⚟ᓥᕷෆࡢ࠶ࡿ㜵ⅆᐇ㦂ᑐ㇟ࡢ㜵ⅆỈᵴࡢᐜ㔞ࡣ⣙40t࡛࠶ࡾ㸪㸰᪥㛫ࡢỈฎ⌮Ỉᵴࡢᩘࡣ 800 ⟠ᡤ௨ୖ࡜࠸ࢃࢀ࡚࠾ࡾࠋᕷẸ࡟㏆࠸ሙᡤ࡟࡛⣙600 kgࡢởἾࡀⓎ⏕ࡋࡓࠋᐇドᐇ㦂⤖ᯝࡼࡾTARDSᕤἲከᩘᏑᅾࡋ࡚࠸ࡿࠋ௬࡟ⅆ⅏ࡀⓎ⏕ࡋࡓሙྜ㸪ᨺᑕ⬟࡟ởᰁ࡟ࡼࡾⓎ⏕ࡋࡓởἾ㔞ࡣฎ⌮Ỉ㸯㹲ᙜࡓࡾ⣙15kg࡛࠶ࡗࡓࠋ

ࡉࢀࡓ㜵ⅆỈᵴࡢỈࢆ฼⏝ࡍࡿ࡜ᨺᑕ⬟ởᰁࢆᣑᩓࡋ࡚ࡋࡲࡲࡓ㸪㜵ⅆỈᵴཎỈࡢᾋ㐟≀㉁⃰ᗘ㸦SS㸧࡜ᨺᑕᛶࢭࢩ࢘࠺࡜࠸࠺ၥ㢟ࡀ࠶ࡿࠋᨺᑕ⬟ởᰁ࠿ࡽᏳ඲࠿ࡘᏳ඲࡞ᕷẸ⏕࣒⃰ᗘࡢ┦㛵㛵ಀࢆồࡵࡓࠋάࢆྲྀࡾᡠࡍࡓࡵ࡟ࡣ㸪ᑠつᶍ࡛࠶ࡗ࡚ࡶ㸪ࡇࢀࡽࡢ㈓Ỉ᪋SS࡜ᨺᑕ⬟⃰ᗘ㝈ᗘࡢ┦㛵㛵ಀࢆᅗ3࡟♧ࡍࠋSSࡀ㧗ࡃ࡞タࡢ㝖ᰁࡣ㔜せ࡛࠶ࡾ㸪TARDS ࡣ᭷ຠ࡞㝖ᰁᕤἲ࡛࠶ࡿࠋࡿ࡜ᨺᑕ⬟⃰ᗘࡶቑຍഴྥ࡛࠶ࡿࠋ⃰ᗘࡢ㧗࠸ィ ⤖ᯝࡢࢹᖹᡂ 25 ᖺ 9 ᭶⎔ቃ┬ࡀⓎ⾲ࡋࡓᅜ┤㎄㝖ᰁࡢᕤ⛬ぢ┤࡟࠾࣮ࢱࡣᑡ࡞࠸ࡀ㸪SS࡜⃰ᗘ㝈ᗘࡢ┦㛵ࡀ࠶ࡾ㸪᤼Ỉᇶ‽್࡜࠸࡚⥺㔞ࡢ㧗࠸㜵ⅆỈᵴࡢởἾࡣ㝖ᰁᑐ㇟࡜ࡍࡿ࡜ࡋ࡚࠸ࡿࠋ

91

東急建設技術研究所報No.39

ㅰ ㎡
ᐇドᐇ㦂ࢆᐇ᪋ࡍࡿ࡟࠶ࡓࡾࡈ༠ຊ࠸ࡓࡔ࠸ࡓᆅඖఫẸࡢ᪉ࠎ㸪⚟ᓥ┴⏕ά⎔ቃ㒊㝖ᰁᑐ⟇ㄢ㸪⚟ᓥᕷᨻ⟇᥎㐍㒊㝖ᰁ᥎㐍ㄢ㸪⚟ᓥᕷᾘ㜵ᮏ㒊࡟ឤㅰ⏦ࡋୖࡆࡲࡍࠋཧ⪃ᩥ⊩1㸧 ᮾᛴᘓタ㸸⚟ᓥ┴⏕ά⎔ቃ㒊㸸ࠕᖹᡂ  ᖺᗘ➨㸯ᅇ⚟ᓥ┴㝖ᰁᢏ⾡ᐇド஦ᴗᐇ᪋⤖ᯝሗ࿌᭩ࠖ㸦ᖹᡂ  ᖺ  ᭶㸧A RADIATION DECONTAMINATION TECHNOLOGY WITH THE IN-VEHICLE WATER TREATMENTSYSTEMTOKYU AMANASU RADIATION DECONTAMINATION SYSTEM FOR THE FIRE PREVENTION WATER TANK

M.Tsubaki, and K.Shibano
TARDS using the in-vehicle model water treatment system is a method to remove radioactive material included in the soil
particles which accumulated in the bottom of the small water tanks such as a water tank, the swimming pool by coagulating
sedimentation.
A worker does not come in contact with a pollutant, and the water processing reduces underwater radiological density byspin-drying aggregate sludge.
TARDS was adopted as "in-vehicle model water treatment equipment" in 2012 of Fukushima by the first decontamination
technology proof business and carried out a decontamination proof experiment in a fire prevention water tank in FukushimaCity.
As a result of we demonstrated it, and having tested it, the radioactivity concentration of the processing water satisfied waste
water regulations by 2-day processing driving enough.

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