Disruptive Effects on a HLW Repository ue to Uplift-Erosion in the Distant Future

2009 ◽  
Vol 1193 ◽  
Author(s):  
Kaname Miyahara ◽  
Manabu Inagaki ◽  
Makoto Kawamura ◽  
Takanori Ebina ◽  
Ian G. McKinley
Keyword(s):  
Conceptual Models ◽  
Distant Future ◽  
Naturally Occurring ◽  
Naturally Occurring Radionuclides ◽  
The Future ◽  
Hlw Repository

AbstractIn Japan, uplift/erosion scenarios must be analysed even if they occur far in the future, as no assessment cut-off times have yet been defined. For this purpose, an argumentation method is developed to allow sensible scenarios to be constructed. The consequences of erosion of the repository may be better estimated in terms of radionuclide fluxes and these compared with those of naturally occurring radionuclides. This paper discusses procedures to derive relevant conceptual models and resultant analyses in a credible manner, which illustrates the effectiveness and robustness of the HLW disposal system.

Illustration of HLW Repository Performance: Using Alternative Yardsticks to Assess Modeled Radionuclide Fluxes

2008 ◽  
Vol 1107 ◽  
Author(s):  
Kaname Miyahara ◽  
Tomoko Kato
Keyword(s):  
Natural Radionuclides ◽  
Conventional Dose ◽  
Geological Processes ◽  
Groundwater Flux ◽  
Naturally Occurring ◽  
Evaluation Point ◽  
Naturally Occurring Radionuclides ◽  
Barrier Performance ◽  
Safety Case ◽  
Hlw Repository

AbstractComplementary indicators have been used in developing a safety case in order to avoid uncertainties in the biosphere modeling used to estimate conventional dose or risk. For example, radionuclide fluxes can be used to evaluate the effectiveness of barrier performance. However, it is difficult to define relevant yardsticks for comparison, because the fluxes of naturally occurring radionuclides due to geological processes vary considerably depending on time and location. This paper discusses the relevance of alternative yardsticks for assessing modeled radionuclide fluxes by selecting yardsticks calculated from fluxes of natural radionuclides at the groundwater discharge point from the geosphere to an aquifer; these are then compared with fluxes of repository-derived radionuclides at the same point. Such yardsticks avoid surface geological processes that may also contribute to natural fluxes, allowing comparison at a suitable, common evaluation point that avoids dependence on site-specific conditions. The effectiveness and robustness of barrier performance is demonstrated using the developed yardsticks and the sensitivity of the analysis to groundwater flux is illustrated.

Optimization of the selection of analysis methods for the determination of naturally occurring radionuclides

Kerntechnik ◽  
2008 ◽  
Vol 73 (3) ◽  
pp. 118-121
Author(s):  
T. Heinrich ◽  
L. Funke ◽  
M. Köhler ◽  
U.-K. Schkade ◽  
F. Ullrich ◽  
...  
Keyword(s):  
Naturally Occurring ◽  
Analysis Methods ◽  
Naturally Occurring Radionuclides ◽  
Selection Of

CONCEPTUAL MODELS OF ARC MAGMATISM: LOOKING TO THE FUTURE

2019 ◽  
Author(s):  
Christy B. Till ◽  
◽  
Adam J.R. Kent ◽  
Geoff Abers
Keyword(s):  
Conceptual Models ◽  
Arc Magmatism ◽  
The Future

The Received Wisdom

2018 ◽  
Author(s):  
Meghan Sullivan
Keyword(s):  
Temporal Discounting ◽  
Value Functions ◽  
Distant Future ◽  
Rational Planning ◽  
Future Discounting ◽  
The Future

This chapter introduces the reader to future discounting and some received wisdom. The received wisdom about rational planning tends to assume that it is irrational to have near‐biased preferences (i.e., preferences for lesser goods now compared to greater goods further in the future).Thechapter describes these preferences by introducing the reader to value functions. Value functions are then used to model different kinds of distant future temporal discounting (e.g., hyperbolic, exponential, absolute). Finally, the chapter makes a distinction between temporal discounting and risk discounting. It offers a reverse lottery test to tease apart these two kinds of discounting.

Distribution of Naturally Occurring Radionuclides in Taiwanese Rocks

1992 ◽  
Vol 45 (1-4) ◽  
pp. 281-283 ◽  
Author(s):  
T.-C. Chu ◽  
P.-S. Weng ◽  
Y.-M. Lin
Keyword(s):  
Naturally Occurring ◽  
Naturally Occurring Radionuclides

scholarly journals Impact of Naturally Occurring Asbestos on Asbestos Ban: Regulations and Experience of the Republic of Korea

2022 ◽  
Vol 19 (2) ◽  
pp. 742
Author(s):  
Jiwoon Kwon
Keyword(s):  
Preventive Measures ◽  
Control Measures ◽  
Exposure Risk ◽  
Close Collaboration ◽  
Mineral Particles ◽  
Naturally Occurring ◽  
Transmission Electron ◽  
The Future ◽  
Naturally Occurring Asbestos ◽  
The Republic

This review examined the main issues debated in Korea regarding the production and use of materials containing naturally occurring asbestos (NOA) as impurities, and investigated the impacts of these debates on the asbestos ban, as well as the future implications. In Korea, incidents associated with the production and use of NOA-contaminated talc powders, construction rocks, serpentinites, and dolomite rocks raised public concern and led to accelerating the ban on asbestos. The main controversies concern policies on appropriate asbestos content limits, whether materials containing a trace amount of NOA should be banned, and the control of materials with high human exposure risk. To address recurring controversies, the implementation of preventive measures to manage elongated mineral particles and the use of transmission electron microscopy for more sensitive analysis need to be discussed, along with reaching social agreement on the controversial policies. To minimize the potential exposure to asbestos that may occur during the production and use of industrial minerals in the future, it is necessary to apply occupational exposure control measures and monitor the health effects of the relevant population groups. These national policies on NOA should be prepared based on close collaboration and discussion with policymakers, industry stakeholders, and related academic experts.

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