Pub Date : 2022-06-30DOI: 10.17146/urania.2022.28.2.6615
Antonio Gogo Hutagaol, Muhammad Ilham Bayquni
KARAKTERISASI MATERIAL INSULASI KABEL LISTRIK TEGANGAN RENDAH DARI PRODUK LOKAL PASCA IRADIASI GAMMA. Penelitian ini ditujukan untuk mempelajari pengaruh radiasi gamma terhadap karakter polimer semi kristalin pada material insulasi kabel listrik tegangan rendah dari produk lokal, terkait penggunaannya di fasilitas dengan radiasi gamma tinggi. Sampel uji diiradiasi menggunakan perangkat Gamma Cell dengan dosis radiasi sebesar 25, 50, 100, 200, 400 dan 800 kGy. Derajat kristalinitas dan komposisi senyawa dari sampel uji dianalisis dengan uji XRD dan dikarakterisasi menggunakan FTIR. Berdasarkan uji XRD yang dilakukan, tidak teramati adanya perbedaan signifikan pada pola difraksi antara sampel uji non iradiasi maupun sampel uji iradiasi dengan variasi besar dosis. Hal ini mengindikasikan tidak terdapat perubahan fase mayor dari senyawa kristalin yang terkandung dalam sampel uji terkait. Adapun derajat kristalinitas dari sampel uji cenderung menurun seiring meningkatnya dosis radiasi yang diberikan. Hasil analisis FTIR menunjukkan adanya perbedaan transmittance yang fluktuatif antar sampel uji dengan dosis radiasi gamma yang berbeda juga dengan sampel uji non-iradiasi gamma. Adanya spektra yang semakin melebar di 400 kGy dan 800 kGy, pada wavenumber 3369 – 3370 cm-1, hal ini mengindikasikan adanya gugus O-H stretch. Pengujian lebih lanjut diperlukan untuk menguatkan identifikasi terhadap gugus fungsi, penentuan senyawa organik, maupun evaluasi terhadap karakter mekanik sampel uji yang sekaligus diperlukan untuk mengonfirmasi dugaan adanya gangguan terhadap asosiasi polimer-plasticizer.Kata kunci: Polimer semi kristalin, irradiasi gamma, derajat kristalinitas, perubahan kimia
{"title":"KARAKTERISASI MATERIAL INSULASI KABEL LISTRIK TEGANGAN RENDAH DARI PRODUK LOKAL PASCA IRADIASI GAMMA","authors":"Antonio Gogo Hutagaol, Muhammad Ilham Bayquni","doi":"10.17146/urania.2022.28.2.6615","DOIUrl":"https://doi.org/10.17146/urania.2022.28.2.6615","url":null,"abstract":"KARAKTERISASI MATERIAL INSULASI KABEL LISTRIK TEGANGAN RENDAH DARI PRODUK LOKAL PASCA IRADIASI GAMMA. Penelitian ini ditujukan untuk mempelajari pengaruh radiasi gamma terhadap karakter polimer semi kristalin pada material insulasi kabel listrik tegangan rendah dari produk lokal, terkait penggunaannya di fasilitas dengan radiasi gamma tinggi. Sampel uji diiradiasi menggunakan perangkat Gamma Cell dengan dosis radiasi sebesar 25, 50, 100, 200, 400 dan 800 kGy. Derajat kristalinitas dan komposisi senyawa dari sampel uji dianalisis dengan uji XRD dan dikarakterisasi menggunakan FTIR. Berdasarkan uji XRD yang dilakukan, tidak teramati adanya perbedaan signifikan pada pola difraksi antara sampel uji non iradiasi maupun sampel uji iradiasi dengan variasi besar dosis. Hal ini mengindikasikan tidak terdapat perubahan fase mayor dari senyawa kristalin yang terkandung dalam sampel uji terkait. Adapun derajat kristalinitas dari sampel uji cenderung menurun seiring meningkatnya dosis radiasi yang diberikan. Hasil analisis FTIR menunjukkan adanya perbedaan transmittance yang fluktuatif antar sampel uji dengan dosis radiasi gamma yang berbeda juga dengan sampel uji non-iradiasi gamma. Adanya spektra yang semakin melebar di 400 kGy dan 800 kGy, pada wavenumber 3369 – 3370 cm-1, hal ini mengindikasikan adanya gugus O-H stretch. Pengujian lebih lanjut diperlukan untuk menguatkan identifikasi terhadap gugus fungsi, penentuan senyawa organik, maupun evaluasi terhadap karakter mekanik sampel uji yang sekaligus diperlukan untuk mengonfirmasi dugaan adanya gangguan terhadap asosiasi polimer-plasticizer.Kata kunci: Polimer semi kristalin, irradiasi gamma, derajat kristalinitas, perubahan kimia","PeriodicalId":23401,"journal":{"name":"Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88791857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-28DOI: 10.17146/urania.2022.28.1.6617
R. Artika, R. Sigit, M. K. Ajiriyanto, T. Yulianto
IMAGE ENHANCEMENT CITRA DIGITAL SHORT PIN PWR FUEL BERISI PELET UO2 ALAM PASCA UJI RADIOGRAFI SINAR-X MENGGUNAKAN PROGRAM IMAGEJ. Pengujian tak merusak menggunakan radiografi sinar-X digital merupakan salah satu rangkaian penting dalam evaluasi unjuk kerja bahan dan bahan bakar nuklir. Image enhancement atau peningkatan kualitas citra sangat dibutuhkan untuk analisis lanjutan terhadap citra hasil radiografi sinar-X digital yang cenderung memiliki resolusi lebih rendah. Proses image enhancement pada citra radiografi sinar-X digital bertujuan untuk memberikan citra yang lebih mudah diinterpretasi sehingga data yang dihasilkan dapat digunakan sebagai dasar evaluasi unjuk kerja bahan bakar setelah proses iradiasi. Pengujian menggunakan radiografi sinar-X digital dilakukan pada short pin PWR fuel berisi pelet UO2 dilakukan pada jarak 40 cm terhadap detektor dengan parameter tegangan dan arus sebesar 120 kV dan 1000 μA. Selanjutnya image enhancement dilakukan terhadap citra digital menggunakan ImageJ meliputi proses penyelarasan terhadap kontras citra, edge enhancement, pengolahan histogram gray value, dan penyesuaian warna citra. Data uji disesuaikan dengan informasi yang harus dicapai dari pengujian radiografi sinar-X digital short pin PWR fuel berisi pelet UO2. Informasi ini dapat berupa data dimensi, batas antar pelet, dan histogram yang menggambarkan adanya perbedaan material atau perbedaan ketebalan. Informasi ini selanjutnya digunakan sebagai input data dalam pemetaan konsep image enhancement short pin PWR fuel berisi pelet UO2. Output citra yang dihasilkan dari proses image enhancement memiliki resolusi dan kualitas citra yang lebih baik untuk memudahkan dalam proses analisis dan interpretasi serta dapat dijadikan metode baku dalam melakukan image enhancement citra radiografi sinar-X digital short pin PWR fuel berisi pelet UO2 pasca iradiasi.Kata Kunci : Image enhancement, radiografi sinar-X digital, short pin PWR, ImageJ, interpretasi.
使用IMAGEJ程序的x射线x射线测试后的UO2试剂合成图像。使用数字x射线照相技术进行的安全测试是确定现有材料和燃料运行的最重要的一系列测试之一。进一步分析数字x射线x射线图像往往分辨率较低的图像是必不可少的。数字x射线成像图像中的形象形象的目的是提供更容易解释的图像，这样由此产生的数据就可以作为辐照后燃料运行评估的基础。测试使用数字x x射线断层照相做肖特的别针压水堆燃料包含小球UO2的探测器距离40厘米(16对电压和电流参数的120万欧元和1000μA。使用ImageJ对数字图像进行增强意象，包括对图像对比度、微调、灰色直方图处理和对图像颜色进行调整的过程。测试数据与数码x射线测试PWR燃料夹的信息相适应。这些信息可以是维度数据、颗粒之间的边界和描述物质差异或厚度差异的直方图。这些信息后来被用作数据输入，在映射图谱谱短pin PWR燃料中包含UO2小球。合成成像过程产生的图像输出具有更好的分辨率和质量，可以简化分析和解释过程，并可以作为一种替代的方法来执行合成图像图像肖特PWR - pi - pi燃料，其中包含自辐射UO2小球。关键词:深度照片、数码x光片、PWR pin、ImageJ、口译。
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Pub Date : 2022-02-28DOI: 10.17146/urania.2022.28.1.6609
Fajar Al Afghani, Erwan Hermawan, Anditania Sari Dwi Putri, Ely Nurlaily
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
{"title":"PENGARUH PENAMBAHAN LARUTAN H3BO3 DAN LiOH TERHADAP PERILAKU KOROSI MATERIAL KELONGSONG ZIRCALOY-2 DALAM MEDIA AIR BEBAS MINERAL","authors":"Fajar Al Afghani, Erwan Hermawan, Anditania Sari Dwi Putri, Ely Nurlaily","doi":"10.17146/urania.2022.28.1.6609","DOIUrl":"https://doi.org/10.17146/urania.2022.28.1.6609","url":null,"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","PeriodicalId":23401,"journal":{"name":"Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91263975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-28DOI: 10.17146/urania.2022.28.1.6596
Fajar Al Afghani, Erwan Hermawan, Siti Shaleha
EFEK NITROCARBURIZING PADA MATERIAL LOW CARBON STEEL TERHADAP KETAHANAN KOROSI DAN KEKERASAN. Penggunaan baja saat ini mengalami pertumbuhan yang cukup pesat. Material baja karbon rendah banyak digunakan pada fasilitas di Instalasi Radiometalurgi, BATAN, terutama untuk komponen struktur konveyor, rantai, gerigi dan sebagainya. Penggunaannya yang semakin masif sehingga berbagai macam perkembangan pada material baja dilakukan. Salah satunya adalah dengan meningkatkan kualitas baja agar dapat digunakan dalam jangka waktu yang lama. Salah satu metode yang dapat digunakan untuk meningkatkan kualitas baja adalah dengan proses nitrokarburasi. Penelitian ini berfokus pada pengaruh proses nitrocarburizing terhadap laju korosi. Proses nitrocarburizing dilakukan pada beberapa sampel dengan temperatur yang berbeda dan gas yang sama. Peningkatan temperatur pada proses nitrocarburizing menghasilkan permukaan spesimen yang lebih keras. Peningkatan kekerasan diperoleh berdasarkan perbedaan temperatur yang meningkat dari 192 HV untuk sampel sebelum dinitrocarburizing menjadi 793 HV untuk sampel nitrocaburizing 450 ºC. Selain itu ketahanan korosi meningkat dengan meningkatnya temperatur nitrocarburizing. Proses nitrocarburizing menyebabkan difusi atom-atom C dan N sehingga membentuk compound layer, diffusion layer, dan transition layer yang terdiri dari lapisan ε-Fe2-3N, γ’- Fe4N, Fe2(N, C)1-z menjadikan lapisan permukaan material menjadi keras dan resistan terhadap korosi. Kata Kunci: Nitrocarburizing , korosi, kekerasan, low carbon steel
硝化碳钢材料对耐腐蚀和硬度的影响。钢的使用经历了相当大的增长。低碳钢材料广泛用于放射性冶金、递质安装设施，特别是输送带、链、齿轮等的部件。它的使用越来越广泛，所以在钢材料上进行了广泛的开发。一种方法是提高钢的质量，使其能长期使用。提高钢质量的一种方法是处理硝化化油器。这项研究的重点是硝基carburizing过程对腐蚀速度的影响。硝基碳化处理是在不同的温度和相同的气体样本中进行的。硝化处理过程的温度升高会产生更坚硬的样本表面。增加暴力中根据不同的气温上升的192 HV来获得dinitrocarburizing之前为793有样本nitrocaburizing 450ºC。此外，耐腐蚀性增加，增加了氮气燃烧温度。nitrocarburizing过程导致C和N原子形成化合物层层扩散,diffusion层层转变层组成的多层ε-Fe2-3Nγ' - Fe4N Fe2 (N, C) 1-z使一层表面变硬材料和耐药菌株对腐蚀。关键词:硝基碳、腐蚀、暴力、低碳钢
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Pub Date : 2022-02-28DOI: 10.17146/urania.2022.28.1.6625
S. Suwoto, R. A. P. Dwijayanto, W. Luthfi, Z. Zuhair
EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTOR. Few decades ago a large number of nuclear reactors were designed to use HEU as the fuel. But the use of HEU is being discouraged since it can be used as a nuclear explosive material which makes its proliferation potential. Most of the HEU-fueled nuclear reactors in the world are either closed or converted into other types that have LEU fuel with 235U enrichment below 20%. To extend lifetime, LEU fuel with high density is developed. The change in fuel density from low to high will also change core neutronics and thermal-hydraulics of the reactor, and as a result, it affects the transient response of the reactor. This paper studies the effects of fuel density on reactivity coefficients and kinetic parameters of pebble bed reactor through several calculations with MCNP6 code combine with ENDF/B-VII.1 continuous energy cross-section nuclear data library. The overall calculation results show that the Doppler temperature coefficient (DTC) increases with increasing fuel density, but the moderator temperature coefficient (MTC) decreases due to hardening of neutron spectrum. Kinetic parameters such as effective delayed neutron fraction (βeff), prompt neutron lifetime(ℓ) and neutron generation time (Ʌ) which significantly reduced with increasing fuel density will strongly affect the reactor control and safety. The results of this work conclude that the selection of 9–15 g/cm3 fuel density should be considered carefully given that its effect on reactor controllability.Keywords: Fuel density, reactivity coefficients, kinetic parameters, MCNP6, ENDF/B-VII.1.
{"title":"EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTOR","authors":"S. Suwoto, R. A. P. Dwijayanto, W. Luthfi, Z. Zuhair","doi":"10.17146/urania.2022.28.1.6625","DOIUrl":"https://doi.org/10.17146/urania.2022.28.1.6625","url":null,"abstract":"EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTOR. Few decades ago a large number of nuclear reactors were designed to use HEU as the fuel. But the use of HEU is being discouraged since it can be used as a nuclear explosive material which makes its proliferation potential. Most of the HEU-fueled nuclear reactors in the world are either closed or converted into other types that have LEU fuel with 235U enrichment below 20%. To extend lifetime, LEU fuel with high density is developed. The change in fuel density from low to high will also change core neutronics and thermal-hydraulics of the reactor, and as a result, it affects the transient response of the reactor. This paper studies the effects of fuel density on reactivity coefficients and kinetic parameters of pebble bed reactor through several calculations with MCNP6 code combine with ENDF/B-VII.1 continuous energy cross-section nuclear data library. The overall calculation results show that the Doppler temperature coefficient (DTC) increases with increasing fuel density, but the moderator temperature coefficient (MTC) decreases due to hardening of neutron spectrum. Kinetic parameters such as effective delayed neutron fraction (βeff), prompt neutron lifetime(ℓ) and neutron generation time (Ʌ) which significantly reduced with increasing fuel density will strongly affect the reactor control and safety. The results of this work conclude that the selection of 9–15 g/cm3 fuel density should be considered carefully given that its effect on reactor controllability.Keywords: Fuel density, reactivity coefficients, kinetic parameters, MCNP6, ENDF/B-VII.1.","PeriodicalId":23401,"journal":{"name":"Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73309344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-28DOI: 10.17146/urania.2022.28.1.6610
Santo Paulus Rajagukguk, S. Bakhri, T. Surbakti
NEUTRONIC CALCULATION FOR PWR MOX FUEL PIN CELLS WITH WIMSD-5B CODE. The WIMSD-5B thermal reactor lattice cell code is used in many laboratories for research reactor calculations and power reactors. The program uses the Wigner-Seitz approximation for cell pin calculations. The approximation has been widely applied to the pin of UO2 cells and has shown good results in previous studies but can produce incorrect results when used for pin cells in MOX fuels. This paper investigates the use of the WIMS-5B code to calculate the neutron multiplication factor and depletion for MOX fuel pin cells. Calculations were performed using the WIMSD-5B code updated with the ENDF-BVIII.0 library. The outer scattering boundary condition was used to overcome the effect of the Wigner-Seitz approach on the lack of MOX fuel. Results of this study indicates that most of the results obtained using ENDF-BVIII.0 are better than ENDF-BVII.1, and this is in line with expectations. The difference in the maximum k-inf value obtained from this library occurs in the fuel that has the greatest enrichment. On the other hand, the addition of the outer scattering limit improves the results obtained using ENDF-BVIII.0, causing a slight improvement for other libraries. This shows that by using appropriate libraries and the addition of the scattering outer limit, the Wigner Seitz approximation for the MOX pin cell pins in WIMS-D5 can yield quite accurate results.Keywords: Wigner-Seitz approximation, WIMS-D5 code, MOX fuel, Doppler reactivity.
{"title":"NEUTRONIC CALCULATION FOR PWR MOX FUEL PIN CELLS WITH WIMSD-5B CODE","authors":"Santo Paulus Rajagukguk, S. Bakhri, T. Surbakti","doi":"10.17146/urania.2022.28.1.6610","DOIUrl":"https://doi.org/10.17146/urania.2022.28.1.6610","url":null,"abstract":"NEUTRONIC CALCULATION FOR PWR MOX FUEL PIN CELLS WITH WIMSD-5B CODE. The WIMSD-5B thermal reactor lattice cell code is used in many laboratories for research reactor calculations and power reactors. The program uses the Wigner-Seitz approximation for cell pin calculations. The approximation has been widely applied to the pin of UO2 cells and has shown good results in previous studies but can produce incorrect results when used for pin cells in MOX fuels. This paper investigates the use of the WIMS-5B code to calculate the neutron multiplication factor and depletion for MOX fuel pin cells. Calculations were performed using the WIMSD-5B code updated with the ENDF-BVIII.0 library. The outer scattering boundary condition was used to overcome the effect of the Wigner-Seitz approach on the lack of MOX fuel. Results of this study indicates that most of the results obtained using ENDF-BVIII.0 are better than ENDF-BVII.1, and this is in line with expectations. The difference in the maximum k-inf value obtained from this library occurs in the fuel that has the greatest enrichment. On the other hand, the addition of the outer scattering limit improves the results obtained using ENDF-BVIII.0, causing a slight improvement for other libraries. This shows that by using appropriate libraries and the addition of the scattering outer limit, the Wigner Seitz approximation for the MOX pin cell pins in WIMS-D5 can yield quite accurate results.Keywords: Wigner-Seitz approximation, WIMS-D5 code, MOX fuel, Doppler reactivity.","PeriodicalId":23401,"journal":{"name":"Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir","volume":"93 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79621545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-28DOI: 10.17146/urania.2022.28.1.6624
T. Firmansyah, B. Dilasari, Jan Setiawan, D. Prajitno
EFFECT OF Al, Zr AND Mo ON CORROSION RESISTANCE OF AlXCrFeNiMo AND AlXCrFeNiZr (X=1, 1.2 AND 1.4) AS FUEL CLADDING MATERIALS. The high entropy alloy of AlxCrFeNiM (with x = 1, 1,2 and 1,4; M = Mo and Zr) was successfully synthesized using powder metallurgy technique with sintering process at 1000 oC in an inert atmosphere. These alloys were designated as fuel cladding for research reactor with high U-density fuel such as U-Mo. One of the critical in-service properties of nuclear fuel cladding is its corrosion behavior. In this study, some properties of the HEA of AlxCrFeNiM such as the phases, microstructures, hardness, and corrosion resistance in 3 wt.% NaCl solution at room temperature were investigated. The results show that the phases in the HEA of AlxCrFeNiMo are FeNi, AlNi and Mo. The HEA of AlxCrFeNiZr has more complex phases compared to the AlxCrFeNiMo. The microstructure of HEA samples show fine grains with some micropores that imperfect the solidification during the sintering process. The hardness value of the HEA of AlxCrFeNiMo has a trend of decreasing as the x value increases. The opposite trend occurs to the HEA of AlxCrFeNiZr that the hardness value increases with increasing x value. The lowest hardness value is Al1.4CrFeNiMo at 262.2 HV, and the highest hardness value of Al1.4CrFeNiZr is at 756.7 HV. The corrosion rate of the AlxCrFeNiMo does not show a specific trend with increasing x value; however, the AlxCrFeNiZr shows decreasing value with increasing x value. The lowest value for the all-HEA samples is 0.20 mmpy for the Al1.4CrFeNiZr. The results of hardness and corrosion tests show that the Zr element combined with the Al element affects not only its hardness but also its corrosion resistance.Keywords: Fuel cladding, high entropy alloy, corrosion
{"title":"EFFECT OF Al, Zr AND Mo ON CORROSION RESISTANCE OF AlXCrFeNiMo AND AlXCrFeNiZr (X=1, 1.2 AND 1.4) AS FUEL CLADDING MATERIALS","authors":"T. Firmansyah, B. Dilasari, Jan Setiawan, D. Prajitno","doi":"10.17146/urania.2022.28.1.6624","DOIUrl":"https://doi.org/10.17146/urania.2022.28.1.6624","url":null,"abstract":"EFFECT OF Al, Zr AND Mo ON CORROSION RESISTANCE OF AlXCrFeNiMo AND AlXCrFeNiZr (X=1, 1.2 AND 1.4) AS FUEL CLADDING MATERIALS. The high entropy alloy of AlxCrFeNiM (with x = 1, 1,2 and 1,4; M = Mo and Zr) was successfully synthesized using powder metallurgy technique with sintering process at 1000 oC in an inert atmosphere. These alloys were designated as fuel cladding for research reactor with high U-density fuel such as U-Mo. One of the critical in-service properties of nuclear fuel cladding is its corrosion behavior. In this study, some properties of the HEA of AlxCrFeNiM such as the phases, microstructures, hardness, and corrosion resistance in 3 wt.% NaCl solution at room temperature were investigated. The results show that the phases in the HEA of AlxCrFeNiMo are FeNi, AlNi and Mo. The HEA of AlxCrFeNiZr has more complex phases compared to the AlxCrFeNiMo. The microstructure of HEA samples show fine grains with some micropores that imperfect the solidification during the sintering process. The hardness value of the HEA of AlxCrFeNiMo has a trend of decreasing as the x value increases. The opposite trend occurs to the HEA of AlxCrFeNiZr that the hardness value increases with increasing x value. The lowest hardness value is Al1.4CrFeNiMo at 262.2 HV, and the highest hardness value of Al1.4CrFeNiZr is at 756.7 HV. The corrosion rate of the AlxCrFeNiMo does not show a specific trend with increasing x value; however, the AlxCrFeNiZr shows decreasing value with increasing x value. The lowest value for the all-HEA samples is 0.20 mmpy for the Al1.4CrFeNiZr. The results of hardness and corrosion tests show that the Zr element combined with the Al element affects not only its hardness but also its corrosion resistance.Keywords: Fuel cladding, high entropy alloy, corrosion","PeriodicalId":23401,"journal":{"name":"Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86105252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The purpose of this analysis is to show whether mining activities have an impact on the grondwater and drinking water quality. Water samples were analyzed in three unfavorable climatic periods during the winter of 2018-2019. The obtained results show that the heavy metal concentrations in water samples do not have values higher than the allowable according to the current statutory regulations. Also, the heavy metal concentration did not change with changes in climate parameters. However, a higher concentration of molybdenum than statutory by the law was found in the period of snow melting. This has shown that in extremely unfavorable climatic conditions, the karst groundwater can contain certain metals that can origin either from the surrounding field or as a result of mining activities, considering that there are two open pits s in the immediate vicinity of the "Surdup" source.
{"title":"Analysis of the mining activities impact on the content of heavy metals in the groundwater and drinking water depending on climate parameters","authors":"M. Pesic, R. Marković","doi":"10.5937/bakar2202039p","DOIUrl":"https://doi.org/10.5937/bakar2202039p","url":null,"abstract":"The purpose of this analysis is to show whether mining activities have an impact on the grondwater and drinking water quality. Water samples were analyzed in three unfavorable climatic periods during the winter of 2018-2019. The obtained results show that the heavy metal concentrations in water samples do not have values higher than the allowable according to the current statutory regulations. Also, the heavy metal concentration did not change with changes in climate parameters. However, a higher concentration of molybdenum than statutory by the law was found in the period of snow melting. This has shown that in extremely unfavorable climatic conditions, the karst groundwater can contain certain metals that can origin either from the surrounding field or as a result of mining activities, considering that there are two open pits s in the immediate vicinity of the \"Surdup\" source.","PeriodicalId":23401,"journal":{"name":"Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81521432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Slavica Miletić, Ana Milijić, Marko Trišić, Sladana Krstic, E. Pozega
The competent and experienced staff is one of the criteria for assessment the technical competence of the laboratory. This paper presents the AHP analysis of competent and experienced laboratory accreditation staff. The following sub-criteria were analyzed: training SRPS ISO 17025:2017, training ISO 9001, training staff to work on a particular machine using a valid method, responsibility, impartiality, confidentiality, authority and interpersonal cooperation of the laboratory staff. The criterion for competent and experienced staff should meet all the requirements for the technical equipment of the laboratory to submit an application for accreditation.
有能力、有经验的工作人员是评价实验室技术能力的标准之一。本文介绍了胜任且经验丰富的实验室认可人员的AHP分析。分析了以下子标准:培训SRPS ISO 17025:2017，培训ISO 9001，培训员工使用有效方法在特定机器上工作，实验室员工的责任，公正性，保密性，权威和人际合作。合格和有经验的工作人员应符合实验室技术设备的所有要求，方可提交认可申请。
{"title":"Analysis of competent staff for the accreditation of laboratories using the AHP method","authors":"Slavica Miletić, Ana Milijić, Marko Trišić, Sladana Krstic, E. Pozega","doi":"10.5937/bakar2202055m","DOIUrl":"https://doi.org/10.5937/bakar2202055m","url":null,"abstract":"The competent and experienced staff is one of the criteria for assessment the technical competence of the laboratory. This paper presents the AHP analysis of competent and experienced laboratory accreditation staff. The following sub-criteria were analyzed: training SRPS ISO 17025:2017, training ISO 9001, training staff to work on a particular machine using a valid method, responsibility, impartiality, confidentiality, authority and interpersonal cooperation of the laboratory staff. The criterion for competent and experienced staff should meet all the requirements for the technical equipment of the laboratory to submit an application for accreditation.","PeriodicalId":23401,"journal":{"name":"Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir","volume":"108 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80841122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Miloš Đukić, Stefan Đorđievski, R. Kovačević, D. Adamović, M. Steharnik, Sanela Vasiljević, Brankica Jakša
Inductively coupled plasma mass spectrometry (ICP-MS) has been an indispensable technique in the analysis of geological samples in the last few decades. This technique can determine a large number of trace elements, such as the precious metals and rare earth elements. However, the technique is limited by the spectral and non-spectral interferences, which can affect the results of analysis. The aim of this study was to reduce the non-spectral interferences by the method of sample dilution (1000 - 10000). A sample containing gold-bearing minerals was subjected to a digestion in aqua regia, and determination was performed on a NexION 1000 PerkinElmer ICP-MS instrument. The results showed that the differences in gold and silver concentrations in the standard and He modes were insignificant at a dilution of 10000 indicating that the matrix effect was reduced applying a higher dilution. The results of XRD analysis have showed that the sulphide minerals pyrite (FeS2 ) and covellite (CuS) were very abundant in the tested samples, so the digestion of these samples with aqua regia has yielded the solutions containing iron and copper as the most abundant components of the matrix.
{"title":"Reduction of the matrix effects in the gold and silver analysis using the ICP-MS technique","authors":"Miloš Đukić, Stefan Đorđievski, R. Kovačević, D. Adamović, M. Steharnik, Sanela Vasiljević, Brankica Jakša","doi":"10.5937/bakar2202001d","DOIUrl":"https://doi.org/10.5937/bakar2202001d","url":null,"abstract":"Inductively coupled plasma mass spectrometry (ICP-MS) has been an indispensable technique in the analysis of geological samples in the last few decades. This technique can determine a large number of trace elements, such as the precious metals and rare earth elements. However, the technique is limited by the spectral and non-spectral interferences, which can affect the results of analysis. The aim of this study was to reduce the non-spectral interferences by the method of sample dilution (1000 - 10000). A sample containing gold-bearing minerals was subjected to a digestion in aqua regia, and determination was performed on a NexION 1000 PerkinElmer ICP-MS instrument. The results showed that the differences in gold and silver concentrations in the standard and He modes were insignificant at a dilution of 10000 indicating that the matrix effect was reduced applying a higher dilution. The results of XRD analysis have showed that the sulphide minerals pyrite (FeS2 ) and covellite (CuS) were very abundant in the tested samples, so the digestion of these samples with aqua regia has yielded the solutions containing iron and copper as the most abundant components of the matrix.","PeriodicalId":23401,"journal":{"name":"Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir","volume":"47 10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82766659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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