Structural design of high temperature metallic components

Tachibana, Yukio; Iyoku, Tatsuo

doi:10.1016/j.nucengdes.2004.08.013

Cited by 27 publications

(17 citation statements)

References 5 publications

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“…hydraulic cylinders, gun barrels, pipes, boilers, and fuel tanks), accumulator shells, cylinders for aerospace industries, nuclear reactors, and military applications, pressure vessel for industrial gases or a media transportation of high-pressurized fluids and piping of nuclear reactors [15]. In most of these applications the cylinder has to operate under severe mechanical and thermal loads causing significant creep, and thus reducing the service life [4,6,7].…”

Section: Introductionmentioning

confidence: 99%

Modeling Steady State Creep in Functionally Graded Thick Cylinder Subjected to Internal Pressure

Singh¹,

Gupta

2009

Journal of Composite Materials

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The steady state creep behavior in an isotropic functionally graded composite cylinder, subjected to internal pressure has been investigated. The cylinder is assumed to be made of composite containing silicon carbide particles in a matrix of pure aluminum. The creep behavior of the material has been described by threshold stress based creep law with a stress exponent of five. The effect of imposing linear particle gradient on the distribution of stress and strain rates in the composite cylinder has been investigated. The study reveals that for the assumed linear particle distribution, the radial stress decreases throughout the cylinder with increase in particle gradient, whereas the tangential, axial, and effective stresses increase significantly near the inner radius but show significant decrease toward the outer radius. The strain rates in the composite cylinder could be reduced significantly by employing gradient in the distribution of reinforcement while keeping the same average amount of reinforcement.

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Section: Introductionmentioning

confidence: 99%

Modeling Steady State Creep in Functionally Graded Thick Cylinder Subjected to Internal Pressure

Singh¹,

Gupta

2009

Journal of Composite Materials

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“…Gas pengotor yang terjadi pada pendingin primer adalah O 2 , N 2 , H 2 O, CH 4 , CO, CO 2 , dan H 2 [18]. Gas ini berasal dari reaksi air/udara yang masuk ke pendingin primer dengan komponen grafit dari teras reaktor, dan insulasi termal pada coaxial duct (bejana penghubung teras dengan komponen primer) [21]. Pada HTTR, gas pengotor harus diantisipasi untuk mencegah korosi grafit di teras dan proses dekarburisasi di tabung intermediate heat exchanger (IHX) yang terbuat dari bahan Hastelloy-XR dan beroperasi pada temperatur tinggi [22,23] …”

Section: Sph Httr-jepangunclassified

Kajian Sistem Pemurnian Helium Reaktor HTGR Berdaya Kecil

Alimah¹,

Sriyono

2017

Jurnal Pengembangan Energi Nuklir

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KAJIAN SISTEM PEMURNIAN HELIUM REAKTOR HTGR BERDAYA KECIL.Sistem pemurnian helium (SPH) adalah salah satu sistem keselamatan pada reaktor HTGR. SPH berfungsi membersihkan pengotor yang ada pada pendingin primer, sehingga dampak terhadap struktur, sistem dan komponen (SSK) reaktor minimal. Ada dua jenis pengotor pada pendingin yaitu berbentuk partikulat (debu karbon, produk fisi (Kr, Xe, Cs,dll.)) dan gas (O2, N2, H2O, CH4, CO, CO2, dan H2). Setiap reaktor mempunyai batasan pengotor yang berbeda selama operasi normal tergantung pada daya reaktor, sistem konversi energi dan jenis bahan bakar yang digunakan. Makalah ini membahas SPH pada HTR-10, HTTR dan desain konseptual RDE. Tujuan kajian adalah mengetahui desain SPH yang optimum dan dapat digunakan sebagai masukan desain SPH RDE. Metodologi yang digunakan adalah kajian literatur berdasarkan pengalaman operasi HTR-10 dan HTTR serta evaluasi desain konseptual RDE. Parameter kajian ditekankan pada batasan pengotor yang dipersyaratkan pada operasi normal, komponen utama alat pemurnian, laju alir masa dan proses regenerasi. Komponen utama peralatan pemurnian yang digunakan pada SPH HTR-10, HTTR dan RDE adalah sama yaitu filter, kolom CuO, water cooler, kolom molecular sieve dan karbon aktif kondisi kriogenik. Berdasarkan pengalaman operasi HTR-10 dan HTTR, desain SPH yang digunakan cukup handal dalam menjaga kemurnian pendingin primer, meskipun batasan pengotor yang ditetapkan berbeda. SPH pada HTTR Jepang memiliki penetapan batas yang lebih ketat yaitu tidak boleh ada pengotor N2, CH4 dan O2 pada operasi normal, serta menggunakan precharcoal trap untuk mengadsorpsi debu halus dibawah 0,1 mikron. Kedua parameter ini dapat diadopsi pada desain SPH RDE agar dampak pengotor terhadap SSK minimal. ABSTRACT THE ASSESSMENT OF HELIUM PURIFICATION SYSTEM OF SMALL POWER HTGR.The helium purification system (HPS) is one of safety system of High Temperature Gas-cooled Reactor. HPS removes impurities in the primary coolant, so that the impact on structure, system and component (SSC) is minimized. The two impurity types are particulates (carbon dust, fission products (Kr, Xe, Cs etc.) and the gases (O2, N2, H2O, CH4, CO, CO2, and H2). Every reactor has a different impurity limit during normal operation, depends on the reactor power, energy conversion system and fuel type. This paper discusses the HPS on HTR-10, HTTR and Indonesian RDE conceptual design. The purpose of this assessment is to determine the optimum HPS design as a role model for Indonesian RDE. The utilized methodology is a literature study based on the operating experiences of both HTR-10 and HTTR as well as the evaluation of RDE conceptual design. This study focuses on the impurities limit during normal operation, the main components of HPS, mass flow-rate and regeneration process. The main component that used in HPS for HTR-10, HTTR and RDE are similar i.e. filter, CuO column, water cooler, molecular sieve bed and cryogenic activated carbon bed. Refer to the HTR-10 and HTTR operational experiences, both of those rea...

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“…Inverse multiplication factors were evaluated at 0, 6,9,12,15,16,17, and 18 fuel-column-loaded cores to predict the first criticality (Ref. 2, p. 39).…”

Section: Description Of Criticality Measurementsmentioning

confidence: 99%