Results 211 to 220 of about 21,352 (240)

LBB for KWU-plants

Nuclear Engineering and Design, 1989
Abstract The leak-before-break behaviour of the coolant piping of KWU-plants is demonstrated using fracture mechanics testing and analysis. The design, load specifications, stress analysis, material, manufacture ans in-sevice is based on the Federal German RSk-guidelines.
G. Bartholomé, R.W. Bieselt, M. Erve
openaire   +1 more source

Probabilistic Fracture Mechanics Analyses Comparison to LBB Assessments

Volume 6B: Materials and Fabrication, 2019
Abstract Analysis of a generic dissimilar metal weld (DMW) susceptible to primary water stress corrosion cracking (PWSCC) in a pressurized water reactor (PWR) is used to compare the newly developed probabilistic models (xLPR code) to the previously performed deterministic leak before break (LBB) analyses.
Robert Kurth, Cedric Sallaberry, Elizabeth Kurth, Frederick Brust   +3 more
  +4 more sources

Crack shape developments for LBB applications

Engineering Fracture Mechanics, 2000
Abstract The flaw shape during sub-critical crack propagation (fatigue or stress corrosion) is important in order to estimate the crack opening area and leak rate at breakthrough and for the leaking crack. The ability to detect this leak rate is one of the cornerstones in the leak before break philosophy. In this study, the crack shape development is
Björn Brickstad, Iradj Sattari-Far
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Die Betriebsfallstudie Landesbank Berlin (LBB)

1998
Die Sparkasse der Stadt Berlin war ein Eigenbetrieb des Berliner Magistrats. Dennoch bestimmten weniger die kommunalen sondern vorrangig die staatlichen Interessen die Unternehmenspolitik. Die Zentralisierung von Macht und Eigentum in den Handen des Staates zeigte sich auch spiegelbildlich in der zentralen Leitung und Kontrolle aller Finanzinstitute ...
Hasko Hüning, Hildegard Maria Nickel, Michael Frey, Silke Grüner, Iris Peinl, Catrin Stock, Olaf Struck-Möbbeck, Sandra Wagner   +7 more
openaire   +1 more source

LBB Under Beyond Design Basis Seismic Loading

Volume 8: Seismic Engineering, 2012
The Atucha II nuclear power plant is a unique pressurized heavy water reactor (PHWR) being constructed in Argentina. The original plant design was by Kraftwerk Union (KWU) in the 1970’s using the German methodology of break preclusion. The plant construction was halted for several decades, but a recent need for power was the driver for restarting the ...
Tao Zhang, Frederick W. Brust, Gery Wilkowski, Heqin Xu, Alfredo A. Betervide, Oscar Mazzantini   +5 more
openaire   +1 more source

LBB Nozzle Transition Parameter Variation and Plasticity Influence

Volume 6A: Materials and Fabrication, 2014
In the framework of the R6 development programme on leak before break NRG investigated a circumferential through wall crack in a pipe with nozzle. A range of crack angles (3–180°), radius over wall thickness ratios (Ri/t = 5, 10, 20, 50 and 100) and nozzle divergence angles (0, 5, 10, 20, 30 and 40°) have been investigated in order to investigate ...
Peter Baas, Frederic Blom
openaire   +1 more source

Involutive Completion to Avoid LBB Condition

2008
We propose to use the involutive form of a system of PDEs in numerical computations. We illustrate our approach by applying it to the Stokes system. As in the case of the solution of differential algebraic equations our approach takes explicitly into account the integrability conditions of the system which are only implicitly present in the original ...
B. Mohammadi, J. Tuomela
openaire   +1 more source

Role of the LBB Condition in Weak Spectral Projection Methods

Journal of Computational Physics, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
AUTERI, FRANCO, J. Guermond, PAROLINI, NICOLA   +2 more
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A computing systems for LBB considerations

NUREG/CP, 1997
A computing system has been developed at VTT Energy for making efficient leak-before-break (LBB) evaluations of piping components. The system consists of fracture mechanics and leak rate analysis modules which are linked via an interactive user interface LBBCAL. The system enables quick tentative analysis of standard geometric and loading situations by
Miettinen, Jaakko, Raiko, Heikki, Keskinen, Rauli, Ikonen, Kari   +4 more
openaire   +3 more sources

Experimental study on LBB behaviour of LMFBR pipe elbows

International Journal of Fatigue, 2008
The concept of leak before break (LBB) has now replaced the traditional design basis of a double ended guillotine break (DEGB) to design the piping systems for new generation of nuclear reactors. The LBB aims at the application of fracture mechanics principle to demonstrate that pipes are, in general, unlikely to experience DEGB without prior ...
P. Nagapadmaja, V. Kalyanaraman, S.R. Satish Kumar, P. Chellapandi   +3 more
openaire   +1 more source