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A GoldSim Model for the Radionuclide Migration of LILW Disposal Site in Gyeongju
Kyutae Park,Hyejin Kim,Sungryul Kim,Jungmin Oh,Baro Lee,Jiung Kim,Hyunyoung Shin,Wookjae Yoo,Sangsoo Han 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.1
The chelating agent and cellulose generated during the operating and decommissioning of a NPP’s form organic complexing compounds. That is accelerate the migration of radionuclide and have a bad influence of LILW disposal site. In this study, the GoldSim (RT module) program was used for the effects of radionuclide migration by organic complex compounds as described above. A scenario was derived for evaluation, and a conceptual design (Concept Art) of the GoldSim model was performed. 1) Derivation of the scenario. For the scenario, we selected a groundwater flow scenario in which groundwater flows in and radionuclides flow out after a lapse of time after the operation of the LILW disposal site in Gyeongju is closed. The inflowing groundwater comes into contact with radioactive waste and the radionuclides dissolve. The dissolved nuclides move past the drum and out of the disposal vessel due to the advection phenomenon. Radionuclides spilled from the disposal vessel pass through the silo internal filler (crushed stone) and reach the engineering barrier concrete. Radionuclides from degraded concrete are scenarios that move along the flow of groundwater to the near and far. 2) Radionuclide migration concept design. The radionuclide movement section was largely designed with Inner (Inside the silo), Near and Far. (A) Inner (Inside the silo) This section is where radionuclides move from the radiation source to the engineering barrier (silo). The detailed migration path was designed to allow radioactive nuclides to flow out and move to waste drums, solidified matrix of indrum, disposal vessel fillers, disposal vessels, silo fillers (crushed stones), and engineered barriers (concrete). The LILW disposal site in Gyeongju has a total of 6 silos. Each of the 6 silos was modeled and designed in consideration of the structural information and positional impact. (B) Near & Far. In generally design, the near is form source term to engineered barrier and far is beyond the engineered barrier. In this study, the near and far designed by radionuclide in the section from the beyond the engineering barrier (silo) to the sea through the groundwater flow through the natural rock. Especially in the case of near, the design was made by applying the position of the natural rock sampling drill hole.
Park, Kyutae,Woo, Kyoohee,Kim, Jongyoun,Lee, Donghwa,Ahn, Yumi,Song, Dongha,Kim, Honggi,Oh, Dongho,Kwon, Sin,Lee, Youngu American Chemical Society 2019 ACS APPLIED MATERIALS & INTERFACES Vol.11 No.16
<P>Conventional printing technologies such as inkjet, screen, and gravure printing have been used to fabricate patterns of silver nanowire (AgNW) transparent conducting electrodes (TCEs) for a variety of electronic devices. However, they have critical limitations in achieving micrometer-scale fine line width, uniform thickness, sharp line edge, and pattering of various shapes. Moreover, the optical and electrical properties of printed AgNW patterns do not satisfy the performance required by flexible integrated electronic devices. Here, we report a high-resolution and large-area patterning of highly conductive AgNW TCEs by reverse offset printing and intense pulsed light (IPL) irradiation for flexible integrated electronic devices. A conductive AgNW ink for reverse offset printing is prepared by carefully adjusting the composition of AgNW content, solvents, surface energy modifiers, and organic binders for the first time. High-quality and high-resolution AgNW micropatterns with various shapes and line widths are successfully achieved on a large-area plastic substrate (120 × 100 mm<SUP>2</SUP>) by optimizing the process parameters of reverse offset printing. The reverse offset printed AgNW micropatterns exhibit superior fine line widths (up to 6 μm) and excellent pattern quality such as sharp line edge, fine line spacing, effective wire junction connection, and smooth film roughness. They are post-processed with IPL irradiation, thereby realizing excellent optical, electrical, and mechanical properties. Furthermore, flexible OLEDs and heaters based on reverse offset printed AgNW micropatterns are successfully fabricated and characterized, demonstrating the potential use of the reverse offset printing for the conductive AgNW ink.</P> [FIG OMISSION]</BR>
박규태 ( Park Kyutae ) 서울대학교 종교문제연구소 2021 종교와 문화 Vol.- No.41
1970年代以後現代日本社會においては新宗敎を中心とした宗敎ブームが廣く生じたが, そのなかで特に注目すべき新しい現象としていわゆる「水子供養」を擧げることができよう。今日水子といえば一般に死産兒や落胎兒あるいは幼いときに死んだ子供たちをさす。從來水子供養に関する硏究の觀點は大きく三つの流れ, すなわち佛敎·神道·新宗敎などと結び付けて解釋する宗敎的な觀點, 落胎をめぐった女性の選擇權を强調するフェミニズム的な觀點, そして水子供養の商業的側面または豊かな社會における不安などの社會心理に焦点を当てる社會學的な觀點に區分できる。本考ではこれらのなか水子供養の宗敎的文脈やその意味に対する考察とあわせて文化論的な解釋を試みることにする. その際ことに傳統的な日本的地藏觀念および「賽の河原」に関わる民俗信仰との接點に注目する。先行硏究では「水子地藏」のことを当たり前の前提とするがゆえに「水子供養において地藏が重要な媒介として登場する脈絡は何か」あるいは「水子地藏が子供のイメージとして表象される理由は何か」ひいては「水子供養から伺えるような日本的感性は何か」というような問いに対しては殆んど問題にしていなかった。このような問題提起に基づく本考の目的は, まずは宗敎的文脈を中心に水子供養をめぐる様々な觀點をまとめてから, 日本的な地藏信仰と水子供養との關係を求め, しかも窮極的に水子供養においてあらわれてくるような獨特の日本的な感受性を「物の哀れ」という日本人の代表的な美意識と関連させて解明することにある.