Results 221 to 230 of about 21,352 (240)

Robust LBB Analyses for Atucha II Nuclear Plant

Volume 1: Codes and Standards, 2011
The Atucha II nuclear power plant is a unique pressurized heavy water reactor being constructed in Argentina. The original plant design was by KWU in the 1970’s using the then German methodology of break preclusion, which assumed that the largest break-opening area would be 10-percent of the cross-sectional area of the largest pipe diameter.
G. Wilkowski, B. Brust, T. Zhang, G. Hattery, S. Kalyanam, D.-J. Shim, E. Kurth, Y. Hioe, M. Uddin, J. J. Johnson, O. R. Maslenikov, A. Gu¨rpinar, A. P. Asfura, B. Sumodobila, A. A. Betervide, O. Mazzantini   +15 more
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Stenberg’s sufficiency criteria for the LBB condition for axisymmetric Stokes flow

Journal of Mathematical Analysis and Applications, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ervin, V. J., Jenkins, E. W.
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On the LBB constant on stretched domains

Mathematische Nachrichten, 2003
AbstractIt is proved that the constant in the Ladyzhenskaja–Babuska–Brezzi condition on stretched domains is proportional to a–1, where a ≥ 1 is the aspect ratio of the stretched domain. In particular, the result is valid for channel domains and plates.
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The LBB project for the new generation of WWER plants and lessons learned from the WWER 440 model 230 LBB project

Nuclear Engineering and Design, 1995
As part of the safety enhancement of WWER-type nuclear power plants (NPPs) with model 213 and 320 reactors operated or constructed in the Czech and Slovak Republics, the leak-before-break (LBB) methodology is applied to main circulating pipe and pressuriser surge lines. The typical feature of all these NPPs is the horizontal type steam generator.
J. Žd'árek, L. Pečínka, F. Kašpar
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Comparison of crack-opening displacement predictions for LBB applications

International Journal of Pressure Vessels and Piping, 2002
Abstract This work was conducted as part of the process of recommending procedures for a new leak-before-break regulatory guide for nuclear piping applications. This regulatory guide may replace the current Nuclear Regulatory Commission (NRC) Draft Standard Review Plan 3.6.3.
D.L Rudland, Y.-Y Wang, G Wilkowski
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Low temperature co-fired LiZrZn ferrites with LBBS glass

Journal of Materials Science: Materials in Electronics, 2016
LiZrZn ferrite materials (Li0.47Zr0.11Zn0.27Fe2.15O4) were synthesized at 900 °C with different contents of LBBS (Li2O-B2O3-Bi2O3-SiO2) glass. We characterized and analyzed the variation in phase formation, structure, sintering shrinkage percentage and magnetic properties of samples along with the content of LBBS glass.
Yixing Gao, Jie Li, Huaiwu Zhang, Yingli Liu, Lijun Jia, Yulan Jing, Weiwei Ling   +6 more
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Elemental Crack Advance assessment and verification for its use in LBB analysis

Nuclear Engineering and Design, 2020
The leak before break (LBB) concept is today widely employed at the nuclear industry to preclude catastrophic rupture, mainly on pipes. This paper presents two complimentary procedures. Both of them are applied via the Finite Element Method, for demonstrating LBB on austenitic stainless steel vessels.
Vélez López, Enrique, Carnicero López, Alberto, Perera Velamazan, Ricardo   +2 more
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Reliability of LBB Evaluation Considering Randomness in Design Parameters

Volume 6: Materials and Fabrication, Parts A and B, 2011
In US, definition of the Leak-Before-Break (LBB) approach and criteria for its use are provided in NUREG-1061. Volume 3 of NUREG-1061 defines LBB as “…the application of fracture mechanics technology to demonstrate that high energy fluid piping is very unlikely to experience double-ended ruptures or their equivalent as longitudinal or diagonal splits.”
Arindam Chakraborty, Haiyang Qian, Angah Miessi   +2 more
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The LBB condition in fractional Sobolev spaces and applications

IMA Journal of Numerical Analysis, 2008
The present work focuses on the approximation of the stationary Stokes equations by means of finite-element-like Galerkin methods. It is shown that, provided the velocity space and the pressure space are compatible in some sense, a Ladyzhenskaya―Babuska―Brezzi condition holds in the fractional Sobolev spaces H s (Ω), s ∈ [0, 1].
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The primal mixed finite element method and the LBB condition

Numerical Methods for Partial Differential Equations, 1992
AbstractSpurious or kinematic modes have posed a major obstacle to the implementation of the mixed finite element method. This research shows that spurious modes resulting from the approximation spaces not satisfying the LBB condition do not prevent a well posed problem.
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