scholarly journals Development and application of a probabilistic evaluation method for advanced process technologies. Final report

1991 ◽  
Author(s):  
H.C. Frey ◽  
E.S. Rubin
Keyword(s):  
Evaluation Method ◽  
Final Report ◽  
Probabilistic Evaluation

Comparison of Environmental Fatigue Evaluation Methods in LWR Water

2008 ◽  
Author(s):  
Makoto Higuchi
Keyword(s):  
Research Council ◽  
Evaluation Method ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Evaluation Methods ◽  
Fatigue Tests ◽  
Final Report ◽  
The Us ◽  
Fatigue Data ◽  
Fatigue Evaluation

Many studies on the environmental fatigue of structural materials in LWR (Light Water Reactor) water have been carried out over the past 30 years. Early environmental fatigue tests were mainly carried out in Japan in the 1980s, and these results were reported to the ASME in 1988. After that, O. Chopra and W. Shack of ANL (Argonne National Laboratory) also carried out similar fatigue tests and reported that their data corresponded well to Japanese data. In the US, the PVRC (Pressure Vessel Research Council) started the CLEE Committee (Cyclic Life and Environmental Effect, Chair: Sumio Yukawa) for developing the environmental fatigue evaluation method in LWR water under the request from the ASME in 1991. This committee continued for 13 years and closed in 2004 after publishing the final report as WRC (Welding Research Council) Bulletin 487. After 1990 in Japan, the EFD Project (1993–1995) and the EFT Project (1994–2006) were carried out under the collaboration of electric utilities, plant vendors and government. A large number of environmental fatigue data have been generated in these projects, and these were offered to the US through the CLEE Committee. Based on Japanese and US fatigue data, environmental fatigue evaluation methods have been established in both countries that assess the effects of some parameters on fatigue life reduction in LWR water environments. This paper introduces the history of studies on the environmental fatigue in LWR water and the contributions of Sumio Yukawa to these activities. After that, the comparison of three major methods of environmental fatigue evaluation such as PVRC, JSME and MJREG/CR-6909 are reported.

scholarly journals Productivity Measurement for the Anti-sliding Pile of Xiluodu Hydropower Project

2015 ◽  
Vol 9 (1) ◽  
pp. 363-368
Author(s):  
Chen Zhiding ◽  
Xiao Fang ◽  
Liu Hao
Keyword(s):  
Construction Projects ◽  
Evaluation Method ◽  
Clear Understanding ◽  
Hydropower Project ◽  
Productivity Measurement ◽  
Construction Productivity ◽  
Probabilistic Evaluation ◽  
Observation Method ◽  
Pile Length ◽  
Material Productivity

In recent decades, there has been a huge rise in the amount of investments and resources put into hydropower construction projects. Thereupon, it is becoming an urgent need to study how to estimate the input so as to control total cost effectively and utilize the resources adequately. With that in mind, this paper introduced the process of construction productivity determination for the anti-sliding pile of Xiluodu Hydropower Project, as a typically measured object. The determination work includes: choosing timing observation method to measure labor and machinery productivity; selecting real-time writing method to measure material productivity; then adopting probabilistic evaluation method to analyze the obtained data resulting from construction productivity; finally forming the consumption quota per unit pile length through comprehensive arrangement of the above steps. Significantly, the research conducted may provide a platform for both the related researchers and practitioners to appreciate the construction and measurement processes of the anti-sliding pile and may pave the way for builders and managers conducting similar projects in future to gain a clear understanding of the efficiency and cost control.

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