JP5519920B2 - Pwr発電所二次冷却系の水処理システム及びその方法 - Google Patents
Pwr発電所二次冷却系の水処理システム及びその方法 Download PDFInfo
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- JP5519920B2 JP5519920B2 JP2008265386A JP2008265386A JP5519920B2 JP 5519920 B2 JP5519920 B2 JP 5519920B2 JP 2008265386 A JP2008265386 A JP 2008265386A JP 2008265386 A JP2008265386 A JP 2008265386A JP 5519920 B2 JP5519920 B2 JP 5519920B2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 100
- 238000001816 cooling Methods 0.000 title claims description 75
- 238000000034 method Methods 0.000 title claims description 16
- 239000001301 oxygen Substances 0.000 claims description 161
- 229910052760 oxygen Inorganic materials 0.000 claims description 161
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 160
- 239000002826 coolant Substances 0.000 claims description 80
- 230000007797 corrosion Effects 0.000 claims description 59
- 238000005260 corrosion Methods 0.000 claims description 59
- 238000002347 injection Methods 0.000 claims description 51
- 239000007924 injection Substances 0.000 claims description 51
- 229940123973 Oxygen scavenger Drugs 0.000 claims description 35
- 238000005259 measurement Methods 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 3
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 32
- 229910000975 Carbon steel Inorganic materials 0.000 description 20
- 239000010962 carbon steel Substances 0.000 description 20
- 238000005070 sampling Methods 0.000 description 17
- 229910052595 hematite Inorganic materials 0.000 description 11
- 239000011019 hematite Substances 0.000 description 11
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 150000001412 amines Chemical class 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
- 230000036284 oxygen consumption Effects 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 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
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000012024 dehydrating agents Substances 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Monitoring And Testing Of Nuclear Reactors (AREA)
Description
101:酸素注入部
102:脱酸素剤注入部
103:ECP測定部
104:第1のECP計
105:第2のECP計
106:ECP校正用大気飽和水注入部
Claims (12)
- PWR発電所二次冷却系の水処理システムであって、
前記PWR発電所二次冷却系の二次冷却材に酸素を注入する酸素注入部を備え、
前記二次冷却材中の酸素を消費するために前記二次冷却材に脱酸素剤を注入する脱酸素剤注入部をさらに備え、前記二次冷却材中の酸素は前記PWR発電所二次冷却系の高圧給水加熱器内において前記脱酸素剤と反応し消費され、
前記脱酸素剤注入部は、前記高圧給水加熱器の上流の配管に接続することを特徴とするPWR発電所二次冷却系の水処理システム。 - 前記酸素注入部は、前記二次冷却材の溶存酸素濃度が2ppb以上となるように、前記二次冷却材に酸素を注入することを特徴とする請求項1に記載のPWR発電所二次冷却系の水処理システム。
- 前記酸素注入部は、前記PWR発電所二次冷却系の復水器下流の配管に接続することを特徴とする請求項1または2に記載のPWR発電所二次冷却系の水処理システム。
- 前記二次冷却材中における材料の腐食電位を測定することにより前記二次冷却材中の溶存酸素濃度及び前記PWR発電所二次冷却系の配管の腐食状態を監視するための腐食電位計を有する腐食電位測定部をさらに備え、
前記酸素注入部は、前記腐食電位測定部の出力に基づいて前記二次冷却材への酸素注入量を調節することを特徴とする請求項1から3のいずれかに記載のPWR発電所二次冷却系の水処理システム。 - 前記腐食電位計は、前記高圧給水加熱器入口もしくは前記高圧給水加熱器出口の直近の配管に接続し、前記PWR発電所の蒸気発生器への酸素流入を監視することを特徴とする請求項4に記載のPWR発電所二次冷却系の水処理システム。
- 前記腐食電位測定部は、酸素濃度の既知な校正用の純水と前記PWR発電所二次冷却系の二次冷却材を各々単独あるいは混合して前記腐食電位計に注入する腐食電位校正用大気飽和水注入部を備え、前記腐食電位測定部は前記PWR発電所二次冷却系に接続したままで校正を行うことを特徴とする請求項4または5に記載のPWR発電所二次冷却系の水処理システム。
- 前記腐食電位測定部は、前記腐食電位計に接続する配管の口径を、前記PWR発電所二次冷却系配管に対して細めることによって二次冷却材の通水流速を増し、系統配管の分岐部から前記腐食電位計との間における配管内での酸素の消費を防ぐと共に、測定値の精度を向上させることを特徴とする請求項4から6のいずれかに記載のPWR発電所二次冷却系の水処理システム。
- PWR発電所二次冷却系の水処理方法であって、
前記PWR発電所二次冷却系の二次冷却材に酸素を注入し、
前記二次冷却材中の酸素を消費するために前記二次冷却材に脱酸素剤を注入し、前記二次冷却材中の酸素は前記PWR発電所二次冷却系の高圧給水加熱器内において前記脱酸素剤と反応し消費され、
前記高圧給水加熱器上流の配管から前記脱酸素剤を注入することを特徴とするPWR発電所二次冷却系の水処理方法。 - 前記二次冷却材の溶存酸素濃度が2ppb以上となるように、前記二次冷却材に酸素を注入することを特徴とする請求項8に記載のPWR発電所二次冷却系の水処理方法。
- 前記PWR発電所二次冷却系の復水器下流の配管から前記酸素を注入することを特徴とする請求項8または9に記載のPWR発電所二次冷却系の水処理方法。
- 前記二次冷却材中における材料の腐食電位を測定することにより前記二次冷却材中の溶存酸素濃度及び前記PWR発電所二次冷却系の配管の腐食状態を監視し、前記腐食電位に基づいて前記二次冷却材への酸素注入量を調節することを特徴とする請求項8から10のいずれかに記載のPWR発電所二次冷却系の水処理方法。
- 前記高圧給水加熱器入口もしくは前記高圧給水加熱器出口の前記二次冷却材中における腐食電位を測定し、前記PWR発電所の蒸気発生器への酸素流入を監視することを特徴とする請求項11に記載のPWR発電所二次冷却系の水処理方法。
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JP5264402B2 (ja) * | 2008-10-14 | 2013-08-14 | 日本原子力発電株式会社 | 腐食電位測定装置 |
JP2011149764A (ja) * | 2010-01-20 | 2011-08-04 | Hitachi-Ge Nuclear Energy Ltd | 原子力プラント構成部材の線量低減方法 |
JP4810617B1 (ja) | 2010-07-27 | 2011-11-09 | 株式会社東芝 | プラントの腐食抑制方法及びプラント |
DE102015120722B4 (de) | 2015-11-30 | 2017-07-27 | Areva Gmbh | Kernkraftwerk und Verfahren zum Betreiben eines Kernkraftwerks |
CN111792715A (zh) * | 2020-06-01 | 2020-10-20 | 大唐东北电力试验研究院有限公司 | 一种火电厂抑制FAC的pH调整系统及方法 |
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