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All Journal Urania Jurnal Ilmiah Daur Bahan Bakar Nuklir Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir
Anditania Sari Dwi Putri
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Materials Science & Nanotechnology

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PENGARUH PENAMBAHAN LARUTAN H3BO3 DAN LiOH TERHADAP PERILAKU KOROSI MATERIAL KELONGSONG ZIRCALOY-2 DALAM MEDIA AIR BEBAS MINERAL Fajar Al Afghani; Erwan Hermawan; Anditania Sari Dwi Putri; Ely Nurlaily
Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol 28, No 1 (2022): Februari, 2022
Publisher : website

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/urania.2022.28.1.6609

Abstract

PENGARUH PENAMBAHAN LARUTAN H3BO3 DAN LiOH TERHADAP PERILAKU KOROSI MATERIAL KELONGSONG ZIRCALOY-2 DALAM MEDIA AIR BEBAS MINERAL. Pendingin primer pada reaktor tipe PHWR dikendalikan secara kimia dengan penambahan asam borat dan LiOH untuk mengantisipasi korosi pada kelongsong bahan bakar yang menggunakan material zircaloy-2 (Zr-2.) Penelitian ini bertujuan untuk menganalisis pengaruh penambahan larutan H3BO3 dan LiOH terhadap jenis dan laju korosi material kelongsong bahan bakar Zr-2 dalam media air bebas mineral. Penambahan bahan H3BO3 dan LiOH pada pendingin reaktor PHWR adalah untuk pengendalian secara kimia. Uji korosi dilakukan pada temperatur kamar untuk menghilangkan pengaruh temperatur tinggi dan tekanan pada proses elektrokimia. Pada penelitian ini dilakukan pengamatan laju korosi material Zr-2 di dalam media air bebas mineral dengan penambahan H3BO3 dan LiOH dengan variasi konsentrasi. Hasil pengamatan, laju korosi Zr-2 menggunakan metode Tafel pada dalam media air bebas mineral dengan penambahan H3BO3 pada konsentrasi 10 ppm, 100 ppm, 500 ppm, 1000 ppm dan 2000 ppm diperoleh laju korosi masing masing 17,29 x 10-3 mpy, 18,51 x 10-3 mpy, 20,82 x 10-3 mpy, 22,71 x 10-3 mpy dan 23,29 x 10-3 mpy. Setelah air bebas mineral, kemudian ditambahkan H3BO3 sebesar 2000 ppm dan LiOH dengan konsentrasi 1 ppm, 2 ppm, 3 ppm, 4 ppm. Hasil analisis menunjukkan bahwa dengan penambahan H3BO3 dan LiOH diperoleh laju korosi semakin menurun secara berurutan yaitu 22,71 x 10-3 mpy, 21,88 x 10-3 mpy, 21.41 x 10-3 mpy, 21,39 x 10-3 mpy, dan penambahan LiOH 5 ppm menyebabkan laju korosi meningkat menjadi 21,45 x 10-3 mpy. Hasil penelitian ini dapat disimpulkan bahwa penambahan LiOH dan H3BO3 berpengaruh terhadap laju korosi material zircaloy-2 dalam media air bebas mineral. Semakin tinggi konsentrasi H3BO3 yang ditambahkan menyebabkan laju korosi semakin meningkat, sedangkan dengan penambahan LiOH menyebabkan laju korosi semakin menurun hingga konsentrasi 4 ppm Namun dengan penambahan LiOH pada konsentrasi 5 ppm menyebabkan laju korosi meningkat sehingga dapat disimpulkan bahwa konsentrasi optimum penambahan LiOH adalah 4 ppm.Kata kunci: zircaloy-2, laju korosi, H3BO3, LiOH, kelongsong
PENGARUH PENAMBAHAN LARUTAN H3BO3 DAN LiOH TERHADAP PERILAKU KOROSI MATERIAL KELONGSONG ZIRCALOY-2 DALAM MEDIA AIR BEBAS MINERAL Fajar Al Afghani; Erwan Hermawan; Anditania Sari Dwi Putri; Ely Nurlaily
Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol. 28 No. 1 (2022): Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/urania.2022.28.1.6609

Abstract

The primary coolant of the PHWR type reactor is controlled chemically by the addition of boric acid and LiOH to anticipate corrosion of the cladding material of Zr-2. This study aimed to analyze the effect of H3BO3 and LiOH solutions on the type and rate of of zircaloy-2 (Zr-2) corrosion in demineralized water. The corrosion test was carried out at room temperature to eliminate the influence of high temperature and pressure on the electrochemical process. In this study, the corrosion rate of Zr-2 was observed in a demineralized water solution with varying concentrations of H3BO3 and LiOH. The observation was done using Tafel method, where the addition of H3BO3 at concentrations of 10 ppm, 100 ppm, 500 ppm,1000 ppm and 2000 ppm resulted in corrosion rate of 17.29 x 10-3 mpy, 18. 51 x 10-3 mpy,20.82 x 10-3 mpy, 22.71 x 10-3 mpy and 23.29 x 10-3 mpy, respectively. The addition of 2000 ppm of H3BO3 and LiOH with varied concentrations of 1 ppm, 2 ppm, 3 ppm, 4 ppm results in decreasing of corrosion rate sequentially, namely 22.71 x 10-3 mpy, 21.88 x 10-3 mpy, 21.41 x 10-3 mpy, 21.39 x 10-3 mpy, whereas the addition of 5 ppm LiOH causes the corrosion rate to increase to 21.45 x 10-3 mpy. It can be concluded that the addition of LiOH and H3BO3 affects the corrosion rate of zircaloy-2 in demineralized water. Higher concentration of H3BO3 causes the corrosion rate to increase meanwhile, the addition of LiOH causes the corrosion rate to decrease to a concentration of 4 ppm. However, the addition of LiOH at a concentration of 5 ppm causes the corrosion rate to increase.
MODEL SIMULATION OF THE EFFECT OF ZINC PHOSPHATE INHIBITOR ON CORROSION RATE OF SECONDARY COOLING PIPE FOR PRESSURIZED WATER REACTOR USING PREDICTOR-CORRECTOR METHOD Fajar Al Afghani; Maman Kartaman Ajiriyanto; Rosika Kriswarini; Arif Nugroho; Juan Carlos Sihotang; Ely Nurlaily; Anditania Sari Dwi Putri
Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol. 30 No. 1 (2024): Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/Urania.2024.8677

Abstract

Corrosion is one of the unavoidable problems in nuclear reactor cooling systems. Secondary Cooling Pipe Multi-Purpose Reactor G.A Siwabessy (MPR-GAS) based on low carbon steel is very easy to oxidize because it is an open circulation cooling system. Zinc-phosphate inhibitor (ZnPO4) is one of the inhibitors used to inhibit the corrosion reaction that occurs between the low carbon steel cooling pipe and the cooling water environment. The research has been carried out on numerical calculations to find a solution for the corrosion rate model of steel with and without an inhibitor by the Predictor-corrector method. The simulation results show that the effect of ZnPO4 inhibitor on the corrosion rate of steel is seen as a relationship between inhibitor concentration and stable time, if the inhibitor concentration increases, the stable time will also increase. The rate of corrosion that occurs (reducing the concentration of corroded product). Therefore, the recommended inhibitor concentration value is 0.9% for models in 0.1 M HCL medium. This concentration is the most appropriate concentration to slow down the corrosion rate most minimal.
Co-Authors ARIF NUGROHO Ely Nurlaily Erwan Hermawan Fajar Al Afghani Fajar Al Afghani Juan Carlos Sihotang Maman Kartaman Ajiriyanto Rosika Kriswarini