A Numerical-Experimental Approach of Indentation Problem: Part I — Force-Dent Response of Steel Pipes

2017 ◽  
Author(s):  
Mario A. Polanco-Loria ◽  
Håvar Ilstad ◽  
Erik Levold
Keyword(s):  
Experimental Approach ◽  
Technology Development ◽  
Experimental Tests ◽  
Assessment Methods ◽  
Development Plan ◽  
Close Collaboration ◽  
Steel Pipes ◽  
Environmental Consequences ◽  
Reliable Assessment ◽  
Indentation Problem

Accidents by trawling impact have the potential of environmental consequences, in terms of safety, monetary values and reputation. Aware of this situation a technology development plan on “Pipeline subject to high interference loads” has been established at STATOIL in close collaboration with GASSCO. The overall achievement is to adapt and introduce more reliable assessment methods in the load and response of pipelines under a trawling impact scenario. This work includes a review of some known force-indentation models appeared in the literature. Some comments on the recently updated version of the DNV-RP-F111 document. Next, the description of the numerical results of 12 analyses of steel pipes studied is described and based on these results a new force-dent proposal is presented. The proposed equations are validated against experimental tests and the findings indicated fairly good predictions as indicated in the conclusions.

A Numerical-Experimental Approach of Indentation Problem: Part II — Force-Dent Response of Polymeric Coated Steel Pipes

2017 ◽  
Author(s):  
Mario A. Polanco-Loria ◽  
Håvar Ilstad ◽  
Erik Levold
Keyword(s):  
Technology Development ◽  
Experimental Tests ◽  
Polymeric Coating ◽  
Coated Steel ◽  
Steel Pipes ◽  
Environmental Consequences ◽  
Reliable Assessment ◽  
Indentation Problem ◽  
Impact Events ◽  
Analytical Expressions

Accidents by trawling impact have the potential of environmental consequences, in terms of safety, monetary values and reputation. Aware of this situation a technology development plan on “Pipeline subject to high interference loads” has been established at STATOIL in close collaboration with GASSCO. The overall achievement is to adapt and introduce more reliable assessment methods in the load and response of pipelines under a trawling impact scenario. Polymeric coating systems have been manly designed and used as thermal isolating material for flow assurance; and little attention has been addressed to mechanical benefits to dissipate energy by large deformation. This property is of special interest to handle impact events typically found during the trawl board impact scenario. The experimental results show the beneficial effect of polymeric coating to protect the steel pipe against indentation when compared to an uncoated system. The results presented in this work focus on new developed analytical expressions to predict the force-dent response of polymeric coated steel pipes using a numerical-experimental research methodology. The proposed equations are validated against experimental tests and the findings indicate fairly good predictions.

scholarly journals ISV technology development plan for buried waste

1992 ◽  
Author(s):  
D.F. Nickelson ◽  
R.A. Callow ◽  
J.K. Luey
Keyword(s):  
Technology Development ◽  
Development Plan

Experimental Assessment of the Offshore Launching Operation of a Jack-Up Unit

2014 ◽  
Author(s):  
Claudio A. Rodríguez ◽  
Paulo T. T. Esperança ◽  
Mário Moura ◽  
Jacques Raigorodsky
Keyword(s):  
Experimental Approach ◽  
Experimental Tests ◽  
Model Tests ◽  
Experimental Assessment ◽  
Simulation Tools ◽  
Experimental Campaign ◽  
Preliminary Model ◽  
Stage 4 ◽  
Reaction Forces ◽  
Jack Up

Recently, an experimental campaign was carried out to assess the feasibility of the launching operation of two jack-up units using a barge as the launching platform. This experimental study was divided in four stages. In stages 1 to 3, a series of preliminary model tests were performed in order to provide scientific understanding of the mechanics of the operation, and investigate systematically the influence of launching parameters. The experimental approach developed for testing this operation and the results of the preliminary launching tests have been discussed in detail in a previous paper [1]. Based on the analyses of the experimental results of stages 1 to 3 and, the results of numerical simulation tools, in stage 4, a final launching condition was designed and a new set of model tests were specified to check the safety of the operation. This paper presents the results and analyses of the experimental tests in stage 4. The conditions tested in this stage covered the expected real launching condition and possible deviations in some launch parameters. The tests results include the 6-DOF motions and trajectories of the launched jack-up and the launch barge, and the reaction forces on the barge rocker arms. Later on, the success of the launching operations of P-59 and P-60 jack-up units confirmed the experimental investigation results and the feasibility of this novel launching procedure. Furthermore, it can be concluded that the experimental approach efficiently served as a tool for the assessment of high risk operations.

Vitrification Technology Development Plan in Tokai Reprocessing Plant

2006 ◽  
Author(s):  
Atsushi Aoshima ◽  
Kazuhiko Tanaka
Keyword(s):  
Noble Metal ◽  
Technology Development ◽  
Liquid Waste ◽  
Development Plan ◽  
Stable Operation ◽  
Radioactive Liquid Waste ◽  
Basic Strategy ◽  
Long Lifetime ◽  
Reprocessing Plant ◽  
Main Electrode

The Tokai Vitrification Facility (TVF) is the only operating vitrification plant in Japan, constructed and operated by JAEA, to vitrify concentrated high radioactive liquid waste (HALW) in the Tokai Reprocessing Plant (TRP). JAEA started TVF hot operation in 1995 and produced 218 canisters as of March, 2006. An existing melter is the second melter, which was installed from 2002 to 2004 in place of the first melter stopped its operation by damage of a main electrode. JAEA has estimated that the damage was caused by accumulation of noble metal. Therefore, melter bottom structure was improved to get better drain ability of glass containing noble metal. Completing the melter replacement, vitrification operation was restarted in October 2004 and produced 88 canisters successfully until the end of March 2006. Through these experiences, JAEA made basic strategy to achieve stable TVF operation: keeping stable operation of the existing melter preventing adverse effect by noble metal accumulation and developing a new advanced melter with long lifetime preparing for future exchange as the third melter. Based on the basic strategy, JAEA made a decade development plan of necessary key technologies and has started the development since 2005.

Status of Future Reactor Technology Development in Korea

2010 ◽  
Author(s):  
Dohee Hahn ◽  
Yeong-Il Kim ◽  
Yong Wan Kim
Keyword(s):  
Nuclear Reactor ◽  
Technology Development ◽  
Atomic Energy Commission ◽  
Development Plan ◽  
Reactor Technology ◽  
Very High Temperature Reactor ◽  
Demonstration Plant ◽  
High Temperature Reactor ◽  
Consistent Direction

In order to provide a consistent direction to long-term R&D activities, the Korea Atomic Energy Commission (KAEC) approved a long-term development plan for future nuclear reactor systems which include sodium cooled fast reactor (SFR) and very high temperature reactor (VHTR) on December 22, 2008. The SFR system is regarded as a promising technology to perform actinide management. The final goal of the long-term SFR development plan is the construction of an advanced SFR demonstration plant by 2028. The nuclear hydrogen project in Korea aims at designing and constructing a nuclear hydrogen demonstration system by 2022 to demonstrate its hydrogen production capability. This paper summarizes the overall long-term project plans for SFR and VHTR technology development and explains results of detailed design studies with supporting R&D activities.

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