Description of Performance Allocation: A Case Study at Yucca Mountain

1997 ◽  
Vol 506 ◽  
Author(s):  
Vinod Vallikat ◽  
S. David Sevougian ◽  
Jerry A. McNeish
Keyword(s):  
Predictive Ability ◽  
Yucca Mountain ◽  
Nuclear Waste Repository ◽  
Substantial Fraction ◽  
Overall Performance ◽  
Waste Repository ◽  
Long Term Performance ◽  
Term Performance

A methodology was developed to determine the effectiveness of different components/barriers in isolating waste from the accessible environment for the potential nuclear waste repository at Yucca Mountain, Nevada [1]. Quantifying the performance offered by different barriers aids in prioritizing the testing and analysis activities aimed at resolving uncertainty in processes and parameters of greatest significance to long-term performance. If a substantial fraction of the overall performance of a repository system may be attributed to the performance of a particular barrier, then it is prudent to devote the necessary resources toward enhancing the confidence in our predictive ability regarding that barrier (through more in-depth characterization and testing).

scholarly journals Long-term performance of fiber-grid-reinforced asphalt overlay pavements: A case study of Korean national highways

2019 ◽  
Vol 6 (4) ◽  
pp. 366-382 ◽  
Author(s):  
Jong-Hoon Lee ◽  
Seung-Beom Baek ◽  
Kang-Hoon Lee ◽  
Jo-Soon Kim ◽  
Jin-Hoon Jeong
Keyword(s):  
Asphalt Overlay ◽  
Korean National Highways ◽  
Long Term Performance ◽  
Term Performance

scholarly journals Numerical analysis of geogrid contribution to railway track reinforcement

2018 ◽  
Vol 211 ◽  
pp. 12006
Author(s):  
António Lanca ◽  
Zuzana Dimitrovová ◽  
Madalena Barroso ◽  
Simona Fontul
Keyword(s):  
Added Value ◽  
Railway Track ◽  
Railway Network ◽  
Vertical Displacements ◽  
Downward Propagation ◽  
Long Term Performance ◽  
Term Performance ◽  
Lateral Deformations

In this work, influence of geogrids on overall stabilization of railway tracks is studied numerically. It is expected that by geogrids implementation significant reduction in the downward propagation of stresses will be obtained, which consequently should assure more resilient long-term performance. In this first approach, however, only added value to the confinement level of the ballast layer is analysed, by evaluation of lateral deformations. A case study is related to a part of the Portuguese railway network. The track and the passing vehicle are modelled in commercial explicit dynamics software LS-DYNA. Firstly, the model is validated by comparison with experimental data. Then a fictitious scenario of the same track with a deteriorated region which is further rehabilitated by the geogrid placement is analysed. Different situations are compared in terms of lateral and vertical displacements at several levels, but for simplicity only rail deflections are shown here.

Long-Term Performance of Jointed Plain Concrete Pavement with Rapid Strength Concrete On California Highways

2021 ◽  
Author(s):  
Michael Darter
Keyword(s):  
Fatigue Cracks ◽  
Plain Concrete ◽  
Concrete Pavement ◽  
Highway Projects ◽  
Strength Concrete ◽  
Heavy Truck ◽  
Overall Performance ◽  
Long Term Performance ◽  
Term Performance

Rapid Strength Concrete (RSC) slabs on six California jointed plain concrete pavement (JPCP) highway projects were surveyed. These projects had been previously surveyed in 2008 at 3-years of age and by 2018 had reached a service life of 13-years. Of the initial 5430 slabs examined in 2008, a total of 1493 RSC slabs, located on 12 traffic lanes, were observed and distress types recorded again in 2018. These slabs included both CTS and 4x4 RSC located in both inner and outer lanes. Only a small percentage (1.4%) of the 5,430 RSC slabs exhibited any distress in 2008 after 3-years' service and the increases were small over the next 10 years of service with the exception of transverse fatigue cracks. The transverse (top down fatigue) type of cracking had the highest percentage and largest increase of any distress type. The heavy truck outside lanes exhibited 21% transversely cracked RSC slabs and the inner passing lanes 3%. The outer truck lanes carried over 3 times more trucks than inner lanes. The RSC slabs were mostly 200-223 mm thick and thus susceptible to fatigue damage. The overall performance of the RSC slabs (both CTS and 4x4 RSC materials) were similar and considered to be outstanding over 13 years with a large majority expected to survive many more years.

The first Italian BIPV project: Case study and long-term performance analysis

Solar Energy ◽  
2016 ◽  
Vol 134 ◽  
pp. 340-352 ◽  
Author(s):  
N. Aste ◽  
C. Del Pero ◽  
F. Leonforte
Keyword(s):  
Performance Analysis ◽  
Long Term Performance ◽  
Term Performance
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