{"id":2218,"date":"2021-07-29T08:28:31","date_gmt":"2021-07-29T08:28:31","guid":{"rendered":"https:\/\/wldstainless.com\/?p=2218"},"modified":"2021-07-29T08:34:18","modified_gmt":"2021-07-29T08:34:18","slug":"why-is-duplex-stainless-steel-used-in-nuclear-power-plant-cooling-water-systems","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/id\/why-is-duplex-stainless-steel-used-in-nuclear-power-plant-cooling-water-systems\/","title":{"rendered":"Mengapa baja stainless dua lapisan digunakan dalam sistem pendingin air pembangkit listrik tenaga nuklir?"},"content":{"rendered":"<p>Sebagai sumber energi bersih, tenaga nuklir merupakan kontributor utama dalam mengurangi emisi karbon di seluruh dunia. Sistem pipa pendingin merupakan kunci keberhasilan operasi sebuah pembangkit listrik tenaga nuklir. Sistem ini terdiri dari ribuan meter pipa dengan berbagai diameter dan ukuran. Ia menyediakan pasokan air yang andal untuk mendinginkan peralatan pabrik. Sistem pipa non-safety harus menyediakan air pendingin yang cukup untuk mendinginkan pabrik, sedangkan sistem keselamatan harus menyediakan air pendingin yang cukup untuk mengendalikan reaktor dan mematikannya dengan aman jika terjadi keadaan darurat.<\/p>\n<p>Bahan pipa ini harus tahan terhadap korosi air pendingin selama masa pakai peralatan. Tergantung pada lokasi pabrik, jenis air pendingin dapat berkisar dari air tawar yang relatif bersih hingga air laut yang tercemar. Pengalaman menunjukkan bahwa seiring berjalannya waktu, berbagai masalah korosi dan tingkat korosi yang berbeda dapat terjadi, merusak sistem dan mencegahnya memberikan air pendingin yang dibutuhkan.<\/p>\n<p>Masalah dengan saluran air pendingin seringkali terkait dengan bahan dan interaksinya dengan air pendingin. Kebocoran akibat terkumpulnya endapan (plak) dan korosi pada sistem merupakan masalah yang paling umum, termasuk akumulasi sedimen, penempelan organisme laut (biofouling), akumulasi produk korosi, dan penyumbatan oleh benda asing. Kebocoran biasanya disebabkan oleh korosi mikroba (MIC), yang merupakan korosi sangat korosif yang disebabkan oleh mikroorganisme tertentu dalam air. Bentuk korosi ini sering terjadi pada baja karbon dan baja stainless yang memiliki kandungan paduan rendah.<\/p>\n<p>Keluli tahan karat telah lama dianggap sebagai pilihan yang layak untuk membina sistem paip bekalan air baharu dan untuk membaiki atau menggantikan sistem keluli karbon yang sedia ada. Keluli tahan karat yang lazim digunakan dalam penyelesaian peningkatan paip ialah keluli tahan karat 304L, 316L atau 6%-Mo. Keluli tahan karat 316L dan 6% -Mo mempunyai perbezaan besar dalam prestasi dan harga. Sekiranya medium penyejukan adalah air yang tidak dirawat, yang sangat korosif dan membawa risiko kerosakan mikrobial, keluli tahan karat 304L dan 316L tidak sesuai. Akibatnya, loji tenaga nuklear terpaksa menaik taraf kepada keluli tahan karat 6%-Mo atau menerima kos penyelenggaraan yang tinggi bagi sistem keluli karbon. Sesetengah loji tenaga nuklear masih menggunakan paip lapisan keluli karbon kerana kos permulaan yang lebih rendah. Menurut ASTM A240, sistem paip bekalan air industri lazimnya diperbuat daripada keluli tahan karat seperti berikut:<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"106\">Nilai<\/td>\n<td width=\"106\">UNS<\/td>\n<td width=\"106\">C<\/td>\n<td width=\"106\">N<\/td>\n<td width=\"106\">Cr<\/td>\n<td width=\"106\">Ni<\/td>\n<td width=\"106\">Mo<\/td>\n<td width=\"106\">Cu<\/td>\n<\/tr>\n<tr>\n<td width=\"106\"><a href=\"https:\/\/wldstainless.com\/materials\/austenitic-stainless-steel\/304-304l-stainless-steel\/\">304L<\/a><\/td>\n<td width=\"106\">S30403<\/td>\n<td width=\"106\">0.03<\/td>\n<td width=\"106\">\/<\/td>\n<td width=\"106\">18.0-20.0<\/td>\n<td width=\"106\">8.0-12.0<\/td>\n<td width=\"106\">\/<\/td>\n<td width=\"106\">\/<\/td>\n<\/tr>\n<tr>\n<td width=\"106\"><a href=\"https:\/\/wldstainless.com\/materials\/austenitic-stainless-steel\/316-316l-stainless-steel\/\">316L<\/a><\/td>\n<td width=\"106\">S31603<\/td>\n<td width=\"106\">0.03<\/td>\n<td width=\"106\">\/<\/td>\n<td width=\"106\">16.0-18.0<\/td>\n<td width=\"106\">10.0-14.0<\/td>\n<td width=\"106\">2.0-3.0<\/td>\n<td width=\"106\">\/<\/td>\n<\/tr>\n<tr>\n<td width=\"106\">6%Mo<\/td>\n<td width=\"106\">N08367<\/td>\n<td width=\"106\">0.03<\/td>\n<td width=\"106\">0.18-0.25<\/td>\n<td width=\"106\">20.0-22.0<\/td>\n<td width=\"106\">23.0-25.0<\/td>\n<td width=\"106\">6.0-7.0<\/td>\n<td width=\"106\">0.75<\/td>\n<\/tr>\n<tr>\n<td width=\"106\"><a href=\"https:\/\/wldstainless.com\/materials\/duplex-stainless-steel\/alloy-2205-stainless-steel\/\">2205<\/a><\/td>\n<td width=\"106\">S32205<\/td>\n<td width=\"106\">0.03<\/td>\n<td width=\"106\">0.14-0.2<\/td>\n<td width=\"106\">22.0-23.0<\/td>\n<td width=\"106\">4.5-6.5<\/td>\n<td width=\"106\">3.0-3.5<\/td>\n<td width=\"106\">\/<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Tembaga padu 2205 terbukti menjadi pilihan yang sangat baik. Pembangkit listrik nuklir Catawba milik Duke Power di Carolina Selatan adalah pembangkit listrik nuklir pertama yang menggunakan tembaga padu 2205 (UNS S32205) dalam sistemnya. Kelas ini mengandung sekitar 3,2% molibdenum dan memiliki ketahanan korosi yang lebih baik serta ketahanan korosi mikroba yang jauh lebih baik dibandingkan dengan baja stainless 304L dan 316L.<\/p>\n<p>Pipa pelindung baja karbon pada bagian atas sistem pipa yang mengalirkan air pasokan ke menara pendingin kondenser utama diganti dengan pipa stainless steel dupleks 2205.<\/p>\n<p>Pengganti baru <a href=\"https:\/\/wldstainless.com\/materials\/duplex-stainless-steel\/alloy-2205-stainless-steel\/\">2205<\/a> Pipa stainless steel dupleks dipasang pada tahun 2002. Pipa tersebut berukuran panjang 60 meter, diameter 76,2 cm dan 91,4 cm, dan ketebalan dinding pipa adalah 0,95 cm. Sistem tersebut ditetapkan sesuai dengan ASME B31.1 Power Piping, yang merupakan salah satu kode manajemen untuk penggunaan yang aman dari sistem pipa pembangkit listrik dan banyak digunakan di seluruh dunia. Setelah 500 hari beroperasi, sistem tersebut telah diperiksa secara menyeluruh. Tidak ditemukan adanya pengkaratan atau korosi selama pemeriksaan tersebut. Pipa stainless steel dupleks 2205 berkinerja sangat baik. Pipa stainless steel 2205 telah berkinerja baik selama lebih dari satu dekade sejak pemasangannya. Berdasarkan pengalaman ini, Duke Power telah menggunakan <a href=\"https:\/\/wldstainless.com\/materials\/duplex-stainless-steel\/alloy-2205-stainless-steel\/\">Pipa stainless steel duplex 2205<\/a> di bagian lain dari sistemnya.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2221\" src=\"https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/07\/Pipe-internal.png\" alt=\"\" width=\"426\" height=\"256\" srcset=\"https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/07\/Pipe-internal.png 426w, https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/07\/Pipe-internal-300x180.png 300w\" sizes=\"auto, (max-width: 426px) 100vw, 426px\" \/><\/p>\n<p><em>Hasil dari pipa 2205 setelah digunakan selama 500 hari.<\/em><\/p>\n<p>&nbsp;<\/p>\n<p>Desainer sistem air pembangkit listrik tenaga nuklir kini memiliki satu opsi tambahan dalam memilih bahan pipa untuk air pendingin yang tahan korosi. Penggunaan dengan sukses dari baja stainless duplex 2205 dapat mengurangi biaya pemeliharaan, mengurangi waktu downtime, dan memastikan keamanan operasi pembangkit listrik tenaga nuklir.<\/p>","protected":false},"excerpt":{"rendered":"<p>As a clean energy source, nuclear power is a major contributor to reducing carbon emissions worldwide. The cooling water piping system is the key to the safe operation of a nuclear power plant. It consists of thousands of feet of pipes of various diameters and sizes. It provides a reliable water supply for the cooling [&hellip;]<\/p>","protected":false},"author":1,"featured_media":2224,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2218","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-social-activities"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"The successful application of 2205 duplex stainless steel can reduce maintenance costs, reduce downtime and ensure the operation safety of nuclear power plants.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"WLD Stainless\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/wldstainless.com\/id\/why-is-duplex-stainless-steel-used-in-nuclear-power-plant-cooling-water-systems\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.1.1\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/wldstainless.com\\\/id\\\/why-is-duplex-stainless-steel-used-in-nuclear-power-plant-cooling-water-systems\\\/#article\",\"name\":\"Why is duplex stainless steel used in nuclear power plant cooling water systems? 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