䋨␠䋩ᣣᧄේሶജቇળ䇸᳓ൻቇㇱળ䇹╙䋲࿁ቯ଀⎇ⓥળ⾗ᢱ࿁ォ౞⋚⹜㛎ⵝ⟎䉕↪䈇䈢
FAC䋨Flow Accelerated Corrosion䋩ㅦᐲ⹏ଔ䈫䋲ᰴ♽♽⛔㋕෼ᡰ⹏ଔ䉮䊷䊄䈱᭎ⷐ

2007ᐕ10᦬ਃ⪉㊀Ꮏᬺᩣᑼળ␠⢛᥊䈫⋡⊛1¾ Ἣജ䇮ේሶജ⊒㔚䊒䊤䊮䊃䈪䈲ᓥ᧪䈎䉌὇⚛㍑᧚ᢱ䈱FAC䈏⚻㛎䈘䉏䈩䈐䈩䈇䉎䇯¾ FAC䈮෸䈿䈜ⅣႺ࿃ሶ䈱ᓇ㗀⹏ଔ䈲᳓ಣℂ䇮᧚ᢱᡷༀ䈫䈇䈦䈢ኻᔕ╷䉕ᬌ⸛䈚䈩䈇䈒਄䈪㕖Ᏹ䈮㊀ⷐ䈪䈅䉎䇯¾ ታᯏ䈪䈲᭽䇱䈭㈩▤ᒻ⁁䋨䉣䊦䊗䊷䇮ಽጘㇱ╬䇱䋩䈏ሽ࿷䈚ታ㛎ቶ⊛⹏ଔ䈮ᣈ䈇䈩䇮䈖䉏䉌㈩▤ᒻ⁁䈱ᵹᴫ䉕䉲䊚䊠䊧䊷䉲䊢䊮䈜䉎䈖䈫䈲࿎㔍䈪䈅䉎䇯¾ 䉁䈢䇮਄⸥ታᯏⅣႺ䉕ᮨᡆ䈚䈢⹜㛎䈪䈲䇮ᄢ㊂䈱㜞᷷䇮㜞ᵹㅦ᳓䈱ଏ⛎䈏ᔅⷐ䈪䈅䉍䇮ᓥ᧪ᄢဳ䊝䊂䊦䊦䊷䊒䈮䈩ታᣉ䈚䈩䈇䈢䇯¾ ᧄ⎇ⓥ䈪䈲䇮PWR䋲ᰴ♽♽⛔ౝ䈱㜞ᵹㅦㇱ૏䈪䈱FAC⃻⽎䉕ౣ⃻䈜䉎䈖䈫䉕⋡⊛䈫䈚䈩䇮࿁ォ౞⋚⹜㛎ⵝ⟎䉕↪䈇䈢⹜㛎䉕ታᣉ䈚䈢䇯¾ ὇⚛㍑䈱FAC䈱ਥⷐ࿃ሶ䈪䈅䉎 pH䇮䊍䊄䊤䉳䊮Ớᐲ䇮᧚ᢱ䋨CrỚᐲ䋩䇮᷷ᐲ䇮ᵹㅦ䈮䈧䈇䈩ታᯏᮨᡆⅣႺਅ䈪䈱ታ㛎ቶ⊛⹏ଔ䉕ⴕ䈦䈢䇯ዉ౉䋺὇⚛㍑䈱ᵹ䉏ടㅦ⣣㘩(FAC)䈮䈧䈇䈩2䉣䊨䊷䉳䊢䊮䈫䉮䊨䊷䉳䊢䊮䈮䈧䈇䈩㵶㵶㵶䉋䈒⍮䉌䉏䈢ᶏ᳓ਛ䈱㌃ว㊄䈱䉣䊨䊷䉳䊢䊮䍃䉮䊨䊷䉳䊢䊮䈱႐ว䇮ᵹ䉏䈱䈞䉖ᢿജ䈮䉋䉍⊹⤑೸㔌䈏↢䈛䇮䈠䈱⚿ᨐ⣣㘩䈏ടㅦ䈘䉏䉎䉣䊨䊷䉳䊢䊮䍃䉮䊨䊷䉳䊢䊮䈪䈅䉎䇯䈠䉏䈮ኻ䈚䈩䇮㪧㪮㪩ේሶജ㪉ᰴ♽䉇Ἣജ䊒䊤䊮䊃䈱㜞᷷᳓ਛ䈪↢䈛䉎὇⚛㍑䈱㪝㪘㪚䈲䊙䉫䊈䉺䉟䊃⊹⤑䈱ኒ⌕ജ䈏ᒝ䈒䇮೸㔌䈪䈲䈭䈒ṁ⸃䈮䉋䉍↢䈛䉎੐⽎䈪䈅䉎䇯䈖䈱䉋䈉䈮⚐ὼ䈢䉎⣣㘩੐⽎䈪䈅䉎䈖䈫䉕⺋䉍䈭䈒␜䈜䈢䉄䇮࿖ᶏᄖ䈮䈍䈇䈩䈲䇮ᧄ੐⽎䈱๭⒓䉕FAC䋨Flow AcceleratedCorrosion,
Flow Assisted Corrosion 䋩 䉇 FIC 䋨 Flow
Induced Corrosion䋩䈱䉋䈉䈮๭䉖䈪䈇䉎䇯ዉ౉䋺὇⚛㍑䈱ᵹ䉏ടㅦ⣣㘩(FAC)䈮䈧䈇䈩䉣䊨䊷䉳䊢䊮䈫䉮䊨䊷䉳䊢䊮䈱㑐ଥ䈱ᮨᑼ࿑
FAC
䉣䊨䊷䉳䊢䊮䍃䉮䊨䊷䉳䊢䊮䈮䈍䈔䉎䉣䊨䊷䉳䊢䊮࿃ሶ䋨䌅䋩䈫䉮䊨䊷䉳䊢䊮࿃ሶ䋨䌃䋩䈱㑐ଥ䈏࿑䈱䉋䈉䈮␜䈘䉏䈩䈇䉎䇯䉣䊨䊷䉳䊢䊮಴ౖ䋺 㵱䉣䊨䊷䉳䊢䊮䈫䉮䊨䊷䉳䊢䊮㪄ᵹ૕䈮䉋䉎᧚ᢱ䈱ଚ㘩㪄㵱䋬␠࿅ᴺੱ⣣㘩㒐㘩දળ✬䋬⵷⪇ᚱ 㩿㪈㪐㪏㪎㪀㩷

3ዉ౉䋺὇⚛㍑䈱ᵹ䉏ടㅦ⣣㘩(FAC)䈮䈧䈇䈩4ᵹㅦ䈫䉣䊨䊷䉳䊢䊮䊶䉮䊨䊷䉳䊢䊮ㅦᐲ䈱㑐ଥ

ฦ⒳㊄ዻ᧚ᢱ䈱೸㔌ㅦᐲ䉣䊨䊷䉳䊢䊮䊶䉮䊨䊷䉳䊢䊮ㅦᐲ䈲䇮㈩▤ౝ䈱ᵹㅦ䈮ᡰ㈩䈘䉏䉎䇯಴ౖ䋺 㵱䉣䊨䊷䉳䊢䊮䈫䉮䊨䊷䉳䊢䊮㪄ᵹ૕䈮䉋䉎᧚ᢱ䈱ଚ㘩㪄㵱䋬␠࿅ᴺੱ⣣㘩㒐㘩දળ✬䋬⵷⪇ᚱ 㩿㪈㪐㪏㪎㪀㩷ዉ౉䋺὇⚛㍑䈱ᵹ䉏ടㅦ⣣㘩(FAC)䈮䈧䈇䈩䊶㊄ዻ᧚ᢱ⴫㕙䈱଻⼔ᕈ㉄ൻ⊹⤑㩿⣕᳇㜞᷷᳓ਛ䈪䈲὇⚛㍑⴫㕙䈮䈲䊙䉫䊈䉺䉟䊃Fe3O4䈏↢ᚑ㪀䈏䇮ᵹ䉏䈱ੂ䉏䈮䉋䉍䇮ṁ⸃෻ᔕ䈏ടㅦ䈘䉏ᷫ⡺䈜䉎੐⽎䇯㪝㪘㪚ⅣႺ᧚ᢱᵹ䉏

䊶Უ᧚⥄り䈏⋥ធṁ⸃䈜䉎䈱䈪䈲䈭䈒䇮⴫㕙䈱଻⼔⊹⤑䈱ടㅦṁ⸃
⃻⽎䈫ℂ⸃䈘䉏䈩䈍䉍䇮ⅣႺ㩿᷷ᐲ䇮pH䇮㉄⚛㪀䇮᧚ᢱ㩿㪚㫉฽᦭₸㪀䇮ᵹ䉏㩿ᵹㅦ䇮ᒻ⁁㪀䈭䈬䈱ᓇ㗀䉕ฃ䈔䉎䇯
䊶FAC䈲Flow Accelerated
Corrosion䉁䈢䈲 Flow Assisted
Corrosion䈱⇛䇯56ዉ౉䋺ᵹ䉏ടㅦ⣣㘩(FAC)䈱៊்੐଀䈫ኻ╷੐⽎⊒↢ᐕ᦬䊒䊤䊮䊃ฬᒰ⹥ㇱ૏⎕៊䊶ᷫ⡺⁁ᴫ

1986/12

Surry 2⛎᳓䊘䊮䊒ๆㄟ♽⛔䋨18㵱㈩▤䉣䊦䊗䋩 ᄢ⎕ᢿ䋨๟ㄝ⸳஻៊უ䊶ੱἴ⊒↢䋩1987/06

Trojanਥ⛎᳓♽14㵱⋥▤ㇱ䋨䉣䊦䊗䈎䉌7Dએᷫ⡺䋨⸵ኈෘ䈘એਅ䋩਄ਅᵹ䋩

1988/09

Surry 2

1990/05

Loviisa 2

1990/07

Millstone 3

1990/07

San Onofre 3

1991/11

Millstone 2

1991/11

Catawba 2

1994/11

Sequoyah 1

1997/04

Fort Calhoun

1999/08

Callawayᷫ⡺䋨2.1mm/䌹䋩⛎᳓䊘䊮䊒ๆㄟ♽⛔䉣䊦䊗ਥ⛎᳓♽⛔ᵹ㊂⸘䉥䊥䊐䉞䉴ਅᵹㇱ⋥⎕ᢿ▤Ḩಽಽ㔌ེ䊄䊧䊮♽⛔6㵱㈩▤⎕ᢿ⛎᳓೙ᓮᑯ䊋䉟䊌䉴▤䋨6㵱㈩▤ṁធㇱ䋨⫳᳇ṳᵨ䋩䈱⋥ਅᵹ஥䋩Ḩಽಽ㔌ེ䊄䊧䊮䉺䊮䉪䌾㜞࿶⛎᳓ടᾲེ㑆㈩▤8㵱䉣䊦䊗䋨೙ᓮᑯ䇮䊂䊐䊠䊷䉱 ⎕ᢿਅᵹ䋩⫳᳇⊒↢ེ⛎᳓䊉䉵䊦(4㵱㈩▤)ᷫ⡺䋨1mm/cycle䋩
#1ૐ࿶⛎᳓ടᾲེౝ14㵱㈩▤䈐ⵚ䋨๟ᣇะᷫ⡺䋩㜞࿶䉺䊷䊎䊮╙4᛽᳇♽⛔䋨12㵱㈩▤5D⎕ᢿ䋨๟ㄝ⸳஻៊უ䋩䉣䊦䊗䋩ౣᾲ䊄䊧䊮䉺䊮䉪䌾㜞࿶⛎᳓ടᾲེ㑆㈩䉩䊨䉼䊮⎕៊▤಴ౖ䋺㪥㪩㪚㪄㪠㫅㪽㫆㫉㫄㪸㫋㫀㫆㫅㩷㪥㫆㫋㫀㪺㪼㩷㪉㪇㪇㪈㪄㪇㪐䉋䉍ᛮ☴ዉ౉䋺ᵹ䉏ടㅦ⣣㘩(FAC)䈱៊்੐଀䈫ኻ╷7಴ౖ䋺ේሶജ቟ో䍃଻቟㒮㪟㫆㫄㪼㫇㪸㪾㪼䋺㪿㫋㫋㫇㪑㪆㪆㫎㫎㫎㪅㫄㪼㫋㫀㪅㪾㫆㪅㫁㫇㪆㪺㫆㫄㫄㫀㫋㫋㪼㪼㪆㪻㫆㫎㫅㫃㫆㪸㪻㪽㫀㫃㪼㫊㪆㪾㪋㪇㪏㪉㪎

8FAC 䊜䉦䊆䉵䊛AVT㜞᷷ⅣႺਅ䈪䈱὇⚛㍑䈱⣣㘩䈲෻ᔕᑼ(1)䈮䉋䈦䈩ㅴⴕ䈜䉎䇯
3Fe + 4H2O = Fe3O4 + 4H2(1) (㋕䈱ട᳓ಽ⸃)䊙䉫䊈䉺䉟䊃䈫Fe2+ 䉟䉥䊮䈱ᐔⴧ䈲෻ᔕᑼ(2)䈮䉋䈦䈩ਈ䈋䉌䉏䉎䇯
Fe3O4 + 2H2O + 2H+ + 2e- = 3Fe2+ + 6OH-(2)᧚ᢱ⴫㕙䈱Fe2+ 䉟䉥䊮䈲ᵹ䉏䈮䉋䈦䈩♽⛔᳓ਛ䈮ᜬ䈤෰䉌䉏䉎䈖䈫䈮䉋䉍FAC䈏
ടㅦ䈘䉏䉎䇯
dm/dt = (D/㱐)䊶䋨Cs - Cbulk) = k䊶䋨Cs - Cbulk)(3)䈖䈖䈪䇮 dm/dt䋺⣣㘩ㅦᐲ
D䋺Fe2+ 䈱᜛ᢔଥᢙ㱐䋺Ⴚ⇇ጀ䈱ෘ䈘(㋕䈱Ớᐲ൨㈩䈏↢䈛䉎ጀ䈱ෘ䈘)Cs䋺䊙䉫䊈䉺䉟䊃⴫㕙䈱Fe2+ ỚᐲCbulk䋺 ♽⛔᳓ਛ䈱Fe2+ Ớᐲk䋺‛⾰᜛ᢔଥᢙ䋨D/㱐䋩Metal(Fe)Fe3O4Ǭ

Boundar(Gy layer(G(G

Bulkwater(G(G(GFlow(G%U

Fe2+Conc.

㧯DWNMDistance⹜㛎ⵝ⟎(1/2)

9¾ ⹜㛎ⵝ⟎䈲㜞ᵹㅦ᧦ઙਅ䈪᳓⾰᧦ઙ䉕৻ቯ䈮଻䈧䈢䉄䇮䊪䊮䉴䊦䊷䉺䉟䊒䈫䈚䈢䇯¾ ⹜㛎ଏ⹜૕䈲㜞ᵹㅦㇱ૏䉕ᮨᡆ䈜䉎䈢䉄䇮࿁ォ౞⋚䈫䈚䈢䇯¾ ⹜㛎᳓䈲䊒䊧䊍䊷䉺䈪ታᯏ⹥ᒰㇱ᷷ᐲ䉁䈪᣹᷷䈚ଏ⹜ㇱ䈮ଏ⛎䈚䈢䇯(GGFYCVGTVCPM
0*0*

%QQNGT(GGFYCVGTRWOR࿑ 㧚 ⹜㛎ⵝ⟎᭎⇛♽⛔

6GUV
5GEVKQP
2WOR

2TGJGCVGTU⹜㛎ⵝ⟎(2/2)

10¾⹜㛎ଏ⹜ㇱ䋨䊘䊮䊒ౝ࿁ォ౞⋚䋩䊶࿁ォ౞⋚๟┵ᵹㅦ :ᦨᄢ 45m/s࿁ォ౞⋚ଏ⹜૕
ᄖᓘ275mm࿑. ⹜㛎ଏ⹜ㇱ(࿁ォ౞⋚)⹜㛎㕙⹜㛎᧦ઙ

11⴫䋮 ⹜㛎᧦ઙ⹜㛎ଏ⹜૕὇⚛㍑䋨Cr฽᦭₸䋺0.02䋬0.25wt%䋩
ૐว㊄㍑䋨Cr฽᦭₸ : 2.25wt%䋩

᷷ᐲ䋨㷄䋩

70, 100䋬150䋬190䋬220࿁ォㅦᐲ (m/sec)

25䋬35䋬45

pH
䋨NH3 䈪೙ᓮ䋩

8.9䋬9.2䋬9.5䋬9.8䋬10N2H4(ppm)

0䋬0.05, 0.1䋬0.2䋬0.35, 0.5

DO2(ppm)<5⹜㛎ᤨ㑆 (Hr)100㶎ਅ✢䈱୯䈲ᧄ⹜㛎䈮䈍䈔䉎ᮡḰ᧦ઙFAC ㅦᐲ⹏ଔᚻᴺ

12¾FAC ㅦᐲ䈲⹜㛎೨ᓟ䈱࿁ォ౞⋚䈱㊀㊂ᷫ㊂䈮䉋䉍⹏ଔ䈚䈢䇯[FAC ㅦᐲ(mg/cm2/hr)] ={[⹜㛎೨౞⋚㊀㊂] – [⹜㛎ᓟ౞⋚㊀㊂ ]}䋯{ [⹜㛎ᤨ㑆]}⹜㛎ㇱ (䊘䊮䊒)⹜㛎೨⹜㛎ᓟ࿑. ⹜㛎ㇱߩ౮⌀(࿁ォ౞⋚)⹜㛎⚿ᨐ – ⹜㛎ᤨ㑆䈱ᓇ㗀

13¾὇⚛㍑⹜㛎 䈱㊀㊂ᷫ㊂䈲⹜㛎ᤨ㑆䈮ኻ䈚䈩⋥✢⊛䈮Ⴧട䈚䈩䈇䉎䇯
¾὇⚛㍑䈱FAC⹜㛎100ᤨ㑆䈪ታᣉ䈚䈢䇯
¾ૐว㊄㍑䈱㊀㊂ᷫ㊂䈲㕖Ᏹ䈮ዊ䈘䈇䇯
ᓥ䈦䈩䇮ૐว㊄㍑䈱FAC⹜㛎䈲500ᤨ㑆䈪ታᣉ䈚䈢䇯࿑. ⹜㛎ᤨ㑆ߩᓇ㗀⹜㛎⚿ᨐ – ࿁ォㅦᐲ䋨ᵹㅦ䋩䈱ᓇ㗀

14¾FACㅦᐲ䈲౞⋚䈱࿁ォㅦᐲ䋨ᵹㅦ䋩䈱Ⴧട䈮઻䈦䈩Ⴧട䈜䉎䇯

࿑. FACㅦᐲߦ෸߷ߔᵹㅦߩᓇ㗀⹜㛎⚿ᨐ – ᷷ᐲ䈱ᓇ㗀

15¾὇⚛㍑䈱FACㅦᐲ䈲150㷄ઃㄭ䈪ᦨᄢ䈫䈭䉎䇯䈖䉏䈲䇮㋕䈱ṁ⸃ᐲ䈫ห᭽䈱௑ะ䈪䈅䉎䇯

࿑. FACㅦᐲߦ෸߷ߔ᷷ᐲߩᓇ㗀⹜㛎⚿ᨐ – pH䈱ᓇ㗀

16¾FACㅦᐲ䈲pH䈱਄᣹䈮઻䈦䈩ᷫዋ䈜䉎䇯․䈮pH9.5એ਄䈪䈠䈱௑ะ䈲㗼⪺䈫䈭䉎䇯¾ૐว㊄㍑䈱FACㅦᐲ䈲὇⚛
㍑䈱1/10䌾1/20䈫ዊ䈘䈇䇯¾ૐว㊄㍑䈱FACㅦᐲ䈲ዊ䈘䈇䈢䉄䇮pH䈫䈱㑐ଥ䈲᣿⏕䈪䈲䈭䈇䇯
࿑. FACㅦᐲߦ෸߷ߔpHߣ᧚ᢱߩᓇ㗀⹜㛎⚿ᨐ – N2H4䈱ᓇ㗀

17¾ห৻pH᧦ઙਅ䈪FACㅦᐲ䈲N2H4 Ớᐲ䋱ppmએਅ䈪ᄌൻ䈲䈭䈇䇯

࿑. FACㅦᐲߦ෸߷ߔN2H4 ߩᓇ㗀18⹜㛎⚿ᨐ – ᧚ᢱ䈱Cr฽᦭₸䈱ᓇ㗀

¾Cr฽᦭₸2.25%䈱ૐว㊄㍑
䈱FACㅦᐲ䈲䇮Cr฽᦭₸
0.02%䈱὇⚛㍑䈱1/20䌾1/50
䈪䈅䉎䇯¾὇⚛㍑ਛ䈱⧯ᐓ䈱C䌲฽᦭₸䈱ᄌൻ䈲FACㅦᐲ䈮ᄢ䈐䈭ᓇ㗀䉕෸䈿䈜䇯

࿑. FACㅦᐲߦ෸߷ߔCr฽᦭₸ߩᓇ㗀

FAC⹏ଔ䈻䈱࿁ォ౞⋚⹜㛎ⵝ⟎ㆡ↪ᅷᒰᕈ19
㪈

¾ ࿁ォ౞⋚⹜㛎ⵝ⟎䉕↪䈇䈢ታ㛎ቶ䈪ታᣉ䈚䈢FAC⹜㛎⚿ᨐ䈲ᄢဳ䊦䊷䊒䈪ታᣉ䈚䈢౏㐿䈱䊂䊷䉺䈫⦟䈇৻⥌䉕␜䈚䈩䈇䉎䇯㪝 㪘 㪚 䇭 㫉㪸 㫋㪼 䋨 㫄 㪾 㪆 㪺 㫄 㪉㪆 㪿 㫉㪀㪚㪸㫉㪹㫆㫅㪄㪪㫋㪼㪼㫃㩿㪚㫉㪑㪇㪅㪇㪉㩼㪀¾ ᓥ䈦䈩䇮࿁ォ౞⋚⹜㛎ⵝ⟎䉕↪䈇䈢ᧄ⹜㛎䈲䇮◲ᤃ⊛䈮䈎䈧⊛⏕䈮᦭ല䈭䊂䊷䉺䉕ᓧ䉎䈖䈫䈏น⢻䈪䈅䉎䇯㪇㪅㪇㪈㪏㪅㪌㪐㪐㪅㪌䌰㪟㩿㪉㪌㷄䋩㪈㪇㪈㪇㪅㪌FAC䈻䈱pH䈱ᓇ㗀㪈䊶㫇㪟㩿㪉㪌㷄䋩䋺㪐㪅㪉䊶㪊㪌㫄㪆㫊䊶㪥㪉㪟㪋㪑㪇㫇㫇㫄䊶㪛㪦㪉㪓㪌㫇㫇㪹䊶㪈㪇㪇㪟㫉㪚㪸㫉㪹㫆㫅㪄㪪㫋㪼㪼㫃㩿㪚㫉㪑㪇㪅㪇㪉㩼㪀㪝 㪘 㪚 䇭 㫉㪸 㫋㪼 㩿 㫄 㪾 㪆 㪺 㫄 㪉㪆 㪿 㫉㪀㪝 㪘 㪚 䇭 㫉㪸 㫋㪼 䋨 㫄 㪾 㪆 㪺 㫄 㪉㪆 㪿 㫉㪀㪇㪅㪈㪇㪅㪈䊶㪊㪌㫄㪆㫊䊶㪥㪉㪟㪋㪑㪇㫇㫇㫄䊶㪛㪦㪉㪓㪌㫇㫇㪹䊶㪈㪇㪇㪟㫉㪇㪅㪇㪇㪈㪈㪚㪸㫉㪹㫆㫅㪄㪪㫋㪼㪼㫃㩿㪚㫉㪑㪇㪅㪇㪉㩼㪀㪣㫆㫎㪸㫃㫃㫆㫐㪄㪪㫋㪼㪼㫃㩿㪚㫉㪑㪉㪅㪉㪌㩼㪀 䊶㪈㪌㪇㷄㪇㪅㪇㪈㪇㪅㪈䊶㫇㪟㩿㪉㪌㷄䋩䋺㪐㪅㪉䊶㪈㪌㪇㷄䊶㪥㪉㪟㪋㪑㪇㫇㫇㫄䊶㪛㪦㪉㪓㪌㫇㫇㪹䊶㪈㪇㪇㪟㫉㪇㪅㪇㪈㪇㪅㪇㪇㪈㪇㪅㪇㪇㪈㪉㪇㪌㪇㪈㪇㪇㪈㪌㪇㪫㪼㫄㫇㪅䋨㷄䋩㪉㪇㪇㪉㪌㪇

FAC䈻䈱᷷ᐲ䈱ᓇ㗀㪉㪌㪊㪇㪊㪌㪋㪇㪋㪌㪌㪇㪩㫆㫋㪸㫀㫋㫀㫅㪾㩷㪪㫇㪼㪼㪻㩷㫆㪽㩷㪛㫀㫊㪺㩷㫆㫌㫋㫊㫀㪻㪼㩿㫄㪆㫊㪀FAC䈻䈱ᵹㅦ䈱ᓇ㗀䋲ᰴ♽㋕ಽᏓ⹏ଔ䉮䊷䊄䈱᭎ⷐ(1/3)

20¾䋲ᰴ♽♽⛔䈮䈍䈔䉎㋕ૐᷫലᨐ䉕⹏ଔ䈜䉎䈢䉄䇮䇸㋕ಽᏓ⹏ଔ䉮䊷䊄䇹䉕㐿⊒䈚䈢䇯㧞ᰴ♽ࠪࠬ࠹ࡓ᭴ᚑߩ⸳ቯ(᧚ᢱ‫ޔ‬᷷ᐲ‫ޔ‬ᵹㅦ‫ޔ‬㨯㨯㨯)¾ᧄ⹏ଔ䉮䊷䊄䈮ᣈ䈇䈩ᧄታ㛎⚿ᨐ䈲ᦨ䉅㊀ⷐ䈭䊂䊷䉺䉕ଏ⛎䈚䈩䈇䉎䇯౉ജ࠺࡯࠲ : ᳓ಣℂ᧦ઙ (NH3, ETA, 㨯㨯㨯)᧚ᢱ╬♽⛔pHಽᏓ䈱⹏ଔ♽⛔ฦㇱ䈱㋕Ớᐲ䈱⹏ଔ

FAC ⹜㛎⚿ᨐ
FAC ㅦᐲ㨯 pH㨯 ᧚ᢱ㨯 ᷷ᐲ㋕⋡ᮡ୯⛎᳓㋕Ớᐲ䈱⹏ଔ䋲ᰴ♽♽⛔䈱ᦨㆡ䈭᳓ಣℂ᧦ઙ䇮᧚ᢱ⸳⸘᧦ઙ䈱⸳ቯ࿑ 䋲ᰴ♽㋕ಽᏓ⹏ଔ䉮䊷䊄䈱䊐䊨䊷䉼䊞䊷䊃䋲ᰴ♽㋕ಽᏓ⹏ଔ䉮䊷䊄䈱᭎ⷐ(2/3)

Calculated Fe Conc.(ppb)¾䋲ᰴ♽㋕ಽᏓ⹏ଔ䉮䊷䊄䈪⹏ଔ䈚䈢♽⛔ฦㇱ䈱㋕Ớᐲ䈲䇮
AVTⅣႺਅ䈪䈱ታᯏ㋕Ớᐲ⸘᷹⚿ᨐ䈫⦟䈇৻⥌䉕␜䈚䈩䈇䉎䇯

Analytical Fe Conc.(ppb)࿑ ታᯏ㋕Ớᐲ⸘᷹ታ❣䈫⸘▚䉮䊷䊄䈮䉋䉎⹏ଔ୯䈱Ყセ21䋲ᰴ♽㋕ಽᏓ⹏ଔ䉮䊷䊄䈱᭎ⷐ(2/3)

22¾᳓ಣℂ᧦ઙᄌᦝᤨ䈱⛎᳓㋕Ớᐲ⹏ଔ⚿ᨐ䈲䇮ታᯏታ❣䈫⦟䈇৻⥌䉕␜䈚䈩䈇䉎䇯¾ᧄ⹏ଔ䉮䊷䊄䈲䇮⛎᳓ಣℂ᧦ઙ෸䈶᧚ᢱᡷༀᤨ䈱⛎᳓㋕Ớᐲૐᷫലᨐ䉕චಽ䈮⹏ଔน⢻䈪䈅䉎䇯⴫ ฦ᳓ಣℂ᧦ઙㆡ↪ᤨ⛎᳓㋕Ớᐲ⹏ଔ⚿ᨐ䋺න૏(ppb)
㜞pHಣℂ㗄⋡ᓥ᧪AVT⸘▚⚿ᨐ

4.8

2.1

ታᯏታ❣

4㨪6

2㨪3ETAಣℂ
NH3ETA

0.6

1.0
0.5㨪1੹ᓟ䈱ᬌ⸛⺖㗴

23¾FACㅦᐲ䈱ૐᷫኻ╷䈫䈚䈩䇮pH䈱਄᣹એᄖ䈮䇸᧚ᢱ䈱ᄌᦝ䇹ਗ䈶䈮䇸ṁሽ㉄⚛䈱Ⴧട䇹䈏䈅䉎䇯¾᧚ᢱ䈱ᄌᦝ䈮䈧䈇䈩䈲䇮FAC䈏㗼⪺䈪䈅䉎ㇱಽ䈻⊛⏕䈮ኻ╷䉕ᣉ䈜ᔅⷐ䈏䈅䉍䇮ᄌᦝኻ⽎ㇱ૏䉕⏕ታ䈮⹏ଔ䈜䉎ᔅⷐ䈏䈅䉎䇯
¾ṁሽ㉄⚛䈱Ⴧട䈮䈧䈇䈩䈲䇮PWR䊒䊤䊮䊃SG䋲ᰴ஥䈪䈲ዪㇱ⊛䈮ਇ⚐‛䈏Ớ❗䈜䉎႐ᚲ䈏ሽ࿷䈜䉎䈢䉄䇮ᒰ⹥ㇱ䈪䈱ਇ⚐‛䈱Ớ❗䈫㉄⚛䈱౒ሽ䈮䉋䈦䈩⊒↢䇮ടㅦ䈘䉏䉎ഀ䉏䇮䊏䉾䊁䉞䊮䉫䈫䈇䈦䈢ዪㇱ⣣㘩㒐ᱛ䈱䈢䉄䇮SG䈻䈱㉄⚛ᜬㄟ㒐ᱛ䉕෩ኒ䈮▤ℂ䈜䉎ᔅⷐ䈏䈅䉎䇯¾ᓥ䈦䈩䇮੹ᓟFACᛥ೙ኻ╷䈲䊒䊤䊮䊃᧚ᢱ䇮᭴ᚑ䉕⠨ᘦ䈚䈢਄䈪䇮᳓ಣℂᡷༀ䇮᧚ᢱᄌᦝ╬䈱ലᨐ䉕✚ว⊛䈮⹏ଔ䈚䇮ㆡᱜൻ䈚䈩䈇䈒䈖䈫䈏ᔅⷐ䈪䈅䉎䇯὇⚛㍑䈱ᵹ䉏ടㅦ⣣㘩(FAC)䈱ᓇ㗀࿃ሶ

24㪝㪘㪚ㅦᐲ䈮ኻ䈜䉎᧚ᢱ䈱ᓇ㗀
¾ ਛᕈ䇮⣕㉄⚛᧦ઙਅ䈪䈱὇⚛㍑䈱FAC
ㅦᐲ䈲ᄢ䈐䈒䇮ૐว㊄㍑䇮䉴䊁䊮䊧䉴㍑
䈱FAC䈮Ყ䈼ᩴ㆑䈇䈮ᄢ䈐䈇䇯

䂾᷷ᐲ䋺180㷄䂾pH䋺7䇮9.5
䂾ṁሽ㉄⚛䋺<5ppb䇮500ppb
䂾ᵹㅦ䋺20 m/s਄Ბ䋺pH7 ㉄⚛䈅䉍ਛᲑ䋺pH9.5 ⣕᳇䋨DO2 <5ppb䋩
ਅᲑ䋺pH7 ⣕᳇䋨DO2 <5ppb䋩

¾ ․䈮䉴䊁䊮䊧䉴㍑
䋨18Cr Stainless䋩䈱FACㅦᐲ䈲㕖Ᏹ䈮ዊ䈘䈇䇯O.Jonas,"Control Erosion/Corrosion of Steels in Wet Steam",Power, March, p102(1985)὇⚛㍑䈱ᵹ䉏ടㅦ⣣㘩(FAC)䈱ᓇ㗀࿃ሶ

25㪝㪘㪚ㅦᐲ䈮෸䈿䈜ṁሽ㉄⚛䈱ᓇ㗀¾ FACㅦᐲ䈲ṁሽ㉄⚛Ớᐲ䈮ᓇ㗀䈘䉏䇮ṁሽ㉄⚛
Ớᐲ䈏㜞䈒䈭䉎䈫FACㅦᐲ䈏ᷫዋ䇯
¾ ṁሽ㉄⚛Ớᐲ䈏㜞䈇ᤨ䈮὇⚛㍑⴫㕙䈮ᒻᚑ䈘䉏䉎㋕㉄ൻ‛䈲䇮䊓䊙䉺䉟䊃(Fe2O3)䈏቟ቯ䈭ⅣႺ䈫䈭䉎䇯䊓䊙䉺䉟䊃䈲ṁ⸃ᐲ䈏3ଔ䈱㋕䈪䈅䉍ṁ⸃ᐲ䈏ዊ䈘䈇䈖䈫䈎䉌ᶧਛ䈻䈱㋕ṁ಴ㅦᐲ䈏ዊ䈘䈒
FACㅦᐲ䈏ዊ䈘䈒䈭䉎䇯䇸὇⚛㍑䇹
䂾᷷ᐲ䋺75㷄䂾pH䋺7䂾ṁሽ㉄⚛䋺0䌾500ppb
䂾ᵹㅦ䋺1.6 m/s
䍀0.5䋦Mo㍑
䊶1Cr-0.5Mo㍑䍁
䂾᷷ᐲ䋺120㷄
䂾pH䋺7䂾ṁሽ㉄⚛䋺 0䌾500ppb
䂾ᵹㅦ䋺35 m/s㪦㪅㪡㫆㫅㪸㫊㪃㩹㪚㫆㫅㫋㫉㫆㫃㩷㪜㫉㫆㫊㫀㫆㫅㪆㪚㫆㫉㫉㫆㫊㫀㫆㫅㩷㫆㪽㩷㩷㪪㫋㪼㪼㫃㫊㩷㫀㫅㩷㪮㪼㫋㩷㪪㫋㪼㪸㫄㩹㪃㪧㫆㫎㪼㫉㪃㩷㪤㪸㫉㪺㪿㪃㩷㫇㪈㪇㪉㩿㪈㪐㪏㪌㪀䉁䈫䉄 (1/2)

26¾FACㅦᐲ䈮ኻ䈜䉎ᓇ㗀䊌䊤䊜䊷䉺䈱⹏ଔ䉕⋡⊛䈫䈚䈩䇮࿁ォ౞⋚⹜㛎ⵝ⟎䈱ㆡ↪䉕⹜䉂䈢䇯
¾FACㅦᐲ䈮ኻ䈜䉎ᓇ㗀䊌䊤䊜䊷䉺⹏ଔ⚿ᨐ䈲䇮ᄢဳ䊦䊷䊒䉕↪䈇䈩ታᣉ䈚䈢⹜㛎⚿ᨐ䈫⦟䈇৻⥌䉕␜䈚䈩䈇䉎䇯¾࿁ォ౞⋚⹜㛎䈲FAC䈮෸䈿䈜ᓇ㗀䊌䊤䊜䊷䉺䈱⹏ଔ䉕◲ଢ䈮ታᣉน⢻䈪䈅䉎䇯¾FACㅦᐲ䈲pH䇮C䌲Ớᐲ䈱Ⴧട䈮䉋䈦䈩ᷫዋ䈚䇮࿁ォ౞⋚䈱࿁ォㅦᐲ䋨ᵹㅦ䋩䈱਄᣹䈮䉋䈦䈩Ⴧട䈜䉎䇯¾FACㅦᐲ䈲᷷ᐲ150㷄ઃㄭ䈪ᦨᄢ䈫䈭䉎䇯
¾FACㅦᐲ䈲৻ቯpH᧦ઙਅ䈪䊍䊄䊤䉳䊮Ớᐲ0.6ppmએਅ䈪䈲ᄌൻ䈲䈭䈇䇯䉁䈫䉄 (2/2)¾FACㅦᐲ䈲䊙䉫䊈䉺䉟䊃䈱ṁ⸃ᐲ䈮ᒝ䈒ଐሽ䈜䉎䇯¾FAC⹜㛎⚿ᨐ䈮ၮ䈨䈇䈩䋲ᰴ♽㋕ಽᏓ⹏ଔ䉮䊷䊄䉕᭴▽䈚䈢䇯¾ᧄ⹏ଔ䉮䊷䊄䈲᳓ಣℂ᧦ઙ䇮᧚ᢱᄌᦝᤨ䈱ታᯏ䋲ᰴ♽⛎᳓㋕Ớᐲ䈱⹏ଔ䈮ㆡ↪น⢻䈪䈅䉎䇯

27