Corrosion issues in high temperature gas-cooled reactor (HTR) systems

Cerullo, N.; Lomonaco, Guglielmo

doi:10.1533/9780857095343.6.731

Cited by 10 publications

(7 citation statements)

References 43 publications

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“…inelastic and elastic scatterings) in an FR cut off the mean energy to about 100e200 keV. So, the fission of fertile nuclides by neutrons above the threshold is rare ( 3 z 1.15e1.20 in FR (Cerullo, 1988)). Nevertheless, in order to transmute the HMs, a fast spectrum is better than a thermal one because of the following:…”

Section: Snf Cycle: Partitioning and Transmutation (Pandt)mentioning

confidence: 99%

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The VHTR and GFR and their use in innovative symbiotic fuel cycles

Chersola

Lomonaco

Marotta

2015

Progress in Nuclear Energy

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Section: Snf Cycle: Partitioning and Transmutation (Pandt)mentioning

confidence: 99%

“…Parameter" (RP) defined (Cerullo, 1988) as RP ¼ s f $(n À 1 À a). RP represents the (n À 1 À a) neutrons provided by the fuel multiplied by s f .…”

Section: Snf Cycle: Partitioning and Transmutation (Pandt)mentioning

confidence: 99%

The VHTR and GFR and their use in innovative symbiotic fuel cycles

Chersola

Lomonaco

Marotta

2015

Progress in Nuclear Energy

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“…Terdapat beberapa penyebab terjadinya kerusakan bahan bakar pebble dalam reaktor antara lain kerusakan akibat tekanan gas hasil fisi, kerusakan akibat tekanan gas CO, kerusakan akibat migrasi kernel [12], dan kerusakan akibat korosi oleh hasil fisi Paladium (Pd) [11,13]. Adanya kerusakan bahan bakar dalam operasional reaktor, maka diperlukan tingkat keselamatan yang tinggi dalam pengelolaan BBNB.…”

Section: Gambar 1 Partikel Bahan Bakar Pebbleunclassified

Karakterisasi Radionuklida Pada Bahan Bakar Bekas Dari Experimental Pebble Bed Reactor

Aisyah

Mirawaty²,

Saputra³

et al. 2019

urania

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KARAKTERISASI RADIONUKLIDA PADA BAHAN BAKAR NUKLIR BEKAS DARI EXPERIMENTAL PEBBLE BED REACTOR. Arbeitsgemeinschaft Versuchsreaktor (AVR) merupakan reaktor nuklir jenis High Temperature Gas Cooled Reactor (HTGR) yang menggunakan bahan bakar berbentuk pebble berlapis TRISO dengan tipe yang sama dengan Reaktor Daya Eksperimental (RDE) yang direncanakan akan dibangun di Indonesia. Oleh karena itu karakteristik radionuklida dalam bahan bakar bekas (BBNB) reaktor AVR dapat digunakan untuk mempelajari karakteristik BBNB reaktor RDE. Salah satu hal penting dalam operasional reaktor nuklir adalah pengelolaan BBNB yang ditimbulkannya. Pengelolaan BBNB reaktor AVR dilakukan dengan penyimpanan dalam dry cask untuk jangka waktu yang lama. Upaya untuk mendisain keselamatan dalam sistem penyimpanan BBNB salah satu kajian penting yang diperlukan adalah karakterisasi radionuklida yang terkandung dalam BBNB. Pada penelitian ini dilakukan karakterisasi radionuklida yang terkandung dalam BBNB dengan menggunakan software ORIGEN 2.1 yang didasarkan pada operasional reaktor AVR. Penelitian ini bertujuan untuk analisis keselamatan penyimpanan BBNB pebble pada dry cask dalam jangka panjang. Hasil penelitian menunjukkan bahwa sampai dengan waktu penyimpanan selama 100 tahun, BBNB sebuah pebble memiliki karakteristik radionuklida hasil aktivasi, aktinida dan anak luruhnya, serta radionuklida hasil fisi dengan total konsentrasi aktivitas sebesar 4,03x1010 Bq/g. Sampai dengan waktu penyimpanan 100 tahun konsentrasi aktivitas radionuklida total dalam dry cask sebesar 7,66x1013 Bq/g untuk kapasitas dry cask yang berisi BBNB pebble berjumlah 1900 buah. Terdapat BBNB pebble dalam dry cask yang mengalami kerusakan pada lapisan TRISO, sehingga dalam dry cask kemungkinan terdapat beberapa radionuklida hasil fisi yang dapat lepas dari BBNB seperti 85Kr, 135Xe, dan 131I yang berupa gas, serta 137Cs,106Ru, 110mAg dan 107Pd yang bersifat logam.Kata kunci: Karakterisasi radionuklida, AVR, bahan bakar nuklir bekas, pebble berlapis TRISO

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“…It is necessary to take into account the inherent characteristics of thermal spray coatings (TSC) [ 8 ]. High-temperature corrosion is inevitable in the presence of an aggressive environment, particularly in fabricated parts exposed for long durations to high-temperature environments [ 9 ]. There are two different methods used to protect the long-lived components and enhance the corrosion resistance: the addition of Al, Cr and Ti with a small % of Y, Zr and H f to the base alloy [ 10 ] and surface modification technologies for depositing protective coatings.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Corrosion of APS- and HVOF-Coated Nickel-Based Super Alloy under Air Oxidation and Melted Salt Domains

et al. 2021

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Various thermal spraying approaches, such as air/atmospheric plasma spraying (APS) and high-velocity oxy-fuel (HVOF) spraying, are widely employed by plants owing to their flexibility, low costs and the high surface quality of the manufactured product. This study focuses on the corrosion behavior of a Ni superalloy coated with powder Cr3C2-25NiCr through APS and HVOF at 950 °C under air oxidation and Na2SO4 + 0.6V2O5 molten salt environments (MSE). The results show that HVOF-deposited Ni superalloys have higher hardness and bond strength than the respective APS coating. The thermo-gravimetric probe reveals that the Ni superalloys exposed to an oxidizing air environment has a minor mass gain compared to those under the MSE domain for both non-coated and coated samples, in line with the parabola curvature rate oxidizing law. The Ni superalloys show good corrosion resistance but poor oxidation resistance in APS-deposited Ni superalloys under the MSE. HVOF-coated Ni superalloys in both environments exhibit better corrosion resistance and lower mass gain than APS-coated superalloys. The excellent coating characteristics of HVOF-coated Ni superalloys lead to their better high-temperature corrosion performance than APS.

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Corrosion issues in high temperature gas-cooled reactor (HTR) systems

Cited by 10 publications

References 43 publications

The VHTR and GFR and their use in innovative symbiotic fuel cycles

The VHTR and GFR and their use in innovative symbiotic fuel cycles

Karakterisasi Radionuklida Pada Bahan Bakar Bekas Dari Experimental Pebble Bed Reactor

High-Temperature Corrosion of APS- and HVOF-Coated Nickel-Based Super Alloy under Air Oxidation and Melted Salt Domains

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