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A new burn-up module for application in fuel performance calculations targeting the helium production rate in (U,Pu)O2 for fast reactors

  • Cechet, A.;Altieri, S.;Barani, T.;Cognini, L.;Lorenzi, S.;Magni, A.;Pizzocri, D.;Luzzi, L.
    • Nuclear Engineering and Technology
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    • v.53 no.6
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    • pp.1893-1908
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    • 2021
  • In light of the importance of helium production in influencing the behaviour of fast reactor fuels, in this work we present a burn-up module with the objective to calculate the production of helium in both in-pile and out-of-pile conditions tracking the evolution of 23 alpha-decaying actinides. This burn-up module relies on average microscopic cross-section look-up tables generated via SERPENT high-fidelity calculations and involves the solution of the system of Bateman equations for the selected set of actinide nuclides. The results of the burn-up module are verified in terms of evolution of actinide and helium concentrations by comparing them with the high-fidelity ones from SERPENT, considering two representative test cases of (U,Pu)O2 fuel in fast reactor conditions. In addition, a code-to-code comparison is made with the independent state-of-the-art module TUBRNP (implemented in the TRANSURANUS fuel performance code) for the same test cases. The herein presented burn-up module is available in the SCIANTIX code, designed for coupling with fuel performance codes.

Economic Impacts of Transportation Investment on Regional Growth: Evidence from a Computable General Equilibrium Model on Japan's Cross-Prefectural-Border Region

  • Thi Thu Trang, HA;Hiroyuki, SHIBUSAWA
    • The Journal of Asian Finance, Economics and Business
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    • v.10 no.2
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    • pp.183-193
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    • 2023
  • This paper proposes and examines the economic impact of infrastructure improvement on the San-En-Nanshin region in the Chubu area of Japan. We develop a single transportation computable general equilibrium (CGE) model for each subregion within the San-En-Nanshin region. The explicit modeling of the transportation infrastructure is defined based on interregional commuting flows and business trips, considering the spatial structure of the San-En-Nanshin economy. A CGE model is integrated with an interregional transportation network model to enhance the framework's potential for understanding the infrastructure's role in regional development. To evaluate the economic impact of transportation improvement, we analyze the interrelationship between travel time savings and regional output and income. The economic impact analysis under the CGE framework reveals how transportation facilities and systems affect firm and household behavior and therefore induce changes in the production and consumption of commodities and transportation services. The proposed theoretical model was tested by using data from the 2005 IO tables of each subregion and the 2006 transport flow dataset issued by the Ministry of Land, Infrastructure, Transport, and Tourism in Japan. As a result, the paper confirms the positive effect of transportation investment on the total output and income of the studied region. Specifically, we found that while economic benefits typically appear in urban areas, rural areas can still potentially benefit from transportation improvement projects.

Studies on Standard Physical Growth and Development by Age and Body Height in Korean Youth (한국인(韓國人)의 연령(年齡) 및 신장별(身長別)에 따른 표준체격치(標準體格値)에 관(關)한 연구(硏究) -7세(歲)부터 20세(歲)까지의 남여(男女)를 중심(中心)으로-)

  • Ahn, Kwang-Tai;Park, Soon-Young;Park, Yang-Won
    • Journal of Preventive Medicine and Public Health
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    • v.17 no.1
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    • pp.145-172
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    • 1984
  • In order to assess the physical growth pattern of Korean Youth, the authors measured the body height, body weight, chestgirth and sitting height of 40967 persons (24832 males and 16135 females) from primary schools, middle and high schools and colleges of metropolitan (urban) and rural areas, and calculated the mene, standard deviation, standard error and coefficient variance of the body weight chestgirth, sitting height and various pertinent index by body height to demonstrate the standard physical growth and development by body height of sex and age. The following conclusions were obtained. 1. Physical growth and development: Rapid growth of physical growth in terms of body height has been observed among males in the age $7{\sim}15$ and among female $7{\sim}13$. Growth in terms of body height turned out to be slower among students of higher age by both sexes. The age of cross over between to sexes is between 10 to 13 years where upon girls out grows boys. Maximum annual growth were upon girls out grows boys. Maximum annual growth were both of 6.16cm from 8 to 9 years old and 12 to 13 years old for boys and 7.2cm from 8 to 9 and 6.1cm from 9 to 10 for girls. This indicates that girls enter a rapidly growing stage 2 years earlier than boys. Meanwhile, prominent improvement in body height of national students over period of ten year was noticed. 2. The distribution status of body height by age: The distribution status of body height by age were as follows; 7 year of age: boys-30cm range of body height from 104.0cm to 133.9cm, girls-27cm from 104.0cm to 130.9cm 8 year of age: boys-30cm from 116.0 to 145.9cm girls-33cm from 113.0 to 145.9cm 9 year of age: boys-30cm from 116.0 to 145.9cm girls-33cm from 113.0 to 145.9cm 10 year of age: boys-39cm from 116.0 to 154.9cm girls-39cm from 119.0 to 157.9cm 11 year of age: boys-45cm from 119.0 to 163.9cm girls-39cm from 122.0 to 160.9cm 12 year of age: boys-45cm from 125.0 to 169.9cm girls-42cm from 125.0 to 166.9cm 13 year of age: boys-45cm from 128.0 to 172.9cm girls-42cm from 128.0 to 169.9cm 14 year of age: boys-48cm from 131.0 to 178.9cm girls-36cm from 134.0 to 169.9cm 15 year of age: boys-42cm from 137.0 to 181.9cm girls-33cm from 137.0 to 169.9cm 16 year of age: boys-39cm from 146.0 to 184.9cm girls-30cm from 143.0 to 172.9cm 17 year of age: boys-39cm from 146.0 to 184.9cm girls-27cm from 143.0 to 169.9cm 18 year of age: boys-36cm from 152.0 to 187.9cm girls-27cm from 146.0 to 172.9cm 19 year of age: boys-30cm from 155.0 to 184.9cm girls-24cm from 146.0 to 169.9cm 20 year of age: boys-24cm from 158.0 to 181.9cm girls-l8cm from 149.0 to 166.9cm 3. Standard values of body weight, chest-girth and sitting height by body height of age were found all age groups from 7 to 20 years old and listed in tables from3-a to 16-a. 4. Standard values of relative body weight, relative chestgirth and relative sitting height by body height of age were found all age groups from 7 to 20 years old and listed in tables from 3-b to 16-b. 5. Standard values of physical and nutritional indices (Rohrer index, Kaup index, Vervaeck index and Pelidisi index) by body height of age were found all age groups from 7 to 20 years old and listed in tables from 3-c to 16-c.

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The Study on Education Program for Rural Elderly (농촌 노인의 생활영역별 교육프로그램 개발 연구)

  • Park Gong Ju;Kim Yang Hee;Park Jeong Yoon
    • The Korean Journal of Community Living Science
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    • v.15 no.4
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    • pp.17-32
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    • 2004
  • The proportion of the elderly in rural area(21.7%) is four times more than that of the urban area (5.4%) in Korea. With this rapid aging of the population in rural Korea there has been growing concern about the quality of life of rural elderly. Compare to urban elderly, rural elderly experience many disadvantages, especially in terms of limited offering of social/educational programs. Their social/educational needs are rarely assessed and there are few programs geared to the needs of rural elderly. In this regard, this study aims (1) to identify education and activity program needs of the rural elderly related to three dimensions: Family life, Farming life, and Community activities and (2) to develop education and activity programs for the rural elderly based on the needs assessment. For this purpose, data are gathered from 413 rural elderly and 110 community welfare specialists, using a structured questionaire. The statistical methods used for data analysis are descriptive statistics, cross tables with SPSS wins 10.0 program. The major findings of this study are as follows: Majority(94.1%) of the rural elderly wants to participate in diverse social/educational programs. They want to have programs dealing with 'relationship enhancement with children', 'nutrition', 'health and care', 'farming skill', 'gardening', 'volunteering', etc. Based on these results, we develop eight types of education program and four types of activity program, according to the priority of their needs in each dimension. There are four sessions of Family life program, and four sessions of Community activities program. The effect of these programs will be evaluated by taking pretest and protest in local basis.

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Comparison of Questionnaire Items Used to Evaluate the Level of Occupational and Environmental Exposure in Questionnaires for Epidemiological Studies (국내 주요 역학 연구에서 사용된 설문지의 직업적, 환경적 노출 문항 비교)

  • Lim, Jiyeon;Yoon, Hyung-Suk;Park, Mansuk;Hong, Young Seoub;Lee, Jong-Koo;Oh, Se-Eun;Kang, Daehee;Lee, Kyoung-Mu
    • Journal of Environmental Health Sciences
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    • v.42 no.2
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    • pp.71-84
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    • 2016
  • Objectives: Exposure assessment using questionnaires is effective in large-scale epidemiological studies. However, a limited number of studies have evaluated the questionnaires used in epidemiologic studies in terms of occupational and environmental exposure. The purpose of this study was to summarize and evaluate questionnaire items included in major epidemiological studies conducted in Korea with regard to occupational and environmental exposure. Methods: A total of 12 studies (four cohort studies, six large-scale cross-sectional surveys, and two panel studies) were selected for this study. Various questionnaire items related with occupational and environmental items were collected and summarized into tables. Results: Although job type and address were included in almost all of the studies, the information on occupational or environmental exposure to specific risk factors was collected in a limited number of studies. Moreover, questionnaire items were not standardized, warranting a continuous effort to develop questionnaires and evaluate their validity. Conclusion: Our results suggest that validated questionnaire items focusing on occupational and environmental exposure need to be developed in order to enhance the availability of the information collected from questions in epidemiological studies.

Differential transform method and numerical assembly technique for free vibration analysis of the axial-loaded Timoshenko multiple-step beam carrying a number of intermediate lumped masses and rotary inertias

  • Yesilce, Yusuf
    • Structural Engineering and Mechanics
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    • v.53 no.3
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    • pp.537-573
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    • 2015
  • Multiple-step beams carrying intermediate lumped masses with/without rotary inertias are widely used in engineering applications, but in the literature for free vibration analysis of such structural systems; Bernoulli-Euler Beam Theory (BEBT) without axial force effect is used. The literature regarding the free vibration analysis of Bernoulli-Euler single-span beams carrying a number of spring-mass systems, Bernoulli-Euler multiple-step and multi-span beams carrying multiple spring-mass systems and multiple point masses are plenty, but that of Timoshenko multiple-step beams carrying intermediate lumped masses and/or rotary inertias with axial force effect is fewer. The purpose of this paper is to utilize Numerical Assembly Technique (NAT) and Differential Transform Method (DTM) to determine the exact natural frequencies and mode shapes of the axial-loaded Timoshenko multiple-step beam carrying a number of intermediate lumped masses and/or rotary inertias. The model allows analyzing the influence of the shear and axial force effects, intermediate lumped masses and rotary inertias on the free vibration analysis of the multiple-step beams by using Timoshenko Beam Theory (TBT). At first, the coefficient matrices for the intermediate lumped mass with rotary inertia, the step change in cross-section, left-end support and right-end support of the multiple-step Timoshenko beam are derived from the analytical solution. After the derivation of the coefficient matrices, NAT is used to establish the overall coefficient matrix for the whole vibrating system. Finally, equating the overall coefficient matrix to zero one determines the natural frequencies of the vibrating system and substituting the corresponding values of integration constants into the related eigenfunctions one determines the associated mode shapes. After the analytical solution, an efficient and easy mathematical technique called DTM is used to solve the differential equations of the motion. The calculated natural frequencies of Timoshenko multiple-step beam carrying intermediate lumped masses and/or rotary inertias for the different values of axial force are given in tables. The first five mode shapes are presented in graphs. The effects of axial force, intermediate lumped masses and rotary inertias on the free vibration analysis of Timoshenko multiple-step beam are investigated.

1970-2014 Current Health Expenditures and National Health Accounts in Korea: Application of SHA2011 (1970-2014년 경상의료비 및 국민보건계정: SHA2011의 적용)

  • Jeong, Hyoung-Sun;Shin, Jeong-Woo
    • Health Policy and Management
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    • v.26 no.2
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    • pp.95-106
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    • 2016
  • A new manual of System of Health Accounts (SHA) 2011, was published jointly by the Organization for Economic Cooperation and Development (OECD), Eurostat, and World Health Organization in 2011. This offers more complete coverage than the previous version, SHA 1.0, within the functional classification in areas such as prevention and a precise approach for tracking financing in the health care sector using the new classification of financing schemes. This paper aims to demonstrate current health expenditure (CHE) and National Health Accounts of the years 1970-2014 constructed according to the SHA2011. Data sources for public financing include budget and settlement documents of the government, various statistics from the National Health Insurance, and others. In the case of private financing, an estimation of total revenue by provider groups is made from the Economic Census data and the household income and expenditure survey, Korean healthcare panel study, etc. are used to allocate those totals into functional classifications. CHE was 105 trillion won in 2014, which accounts for 7.1% of Korea's gross domestic product. It was a big increase of 7.7 trillion won, 7.9%, from the previous year. Public share (government and compulsory schemes) accounting for 56.5% of the CHE in 2014 was still much lower than the OECD average of about 73%. With these estimates, it is possible to compare health expenditures of Korea and other countries better. Awareness and appreciation of the need and gains from applying SHA2011 for the health expenditure classification are expected to increase as OECD health expenditure figures get more frequently quoted among health policy makers.

The Middle Aged's perception of Aging and Physical, Financial & Social Preparation for Later Life : Focus on Gender Differences (광주.전남 중년층의 노년기 인식과 신체적, 경제적, 사회적 노후준비: 성차를 중심으로)

  • Lee, Jeong-Hwa
    • The Korean Journal of Community Living Science
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    • v.20 no.2
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    • pp.275-289
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    • 2009
  • The purpose of this study is to examine the middle aged's perception of aging and the degree of physical/financial/social preparation for later life and to explore the effect of the middle aged's perception of aging, who live in Gwangju & Jeonnam of Korea, on physical/financial/social preparation for later life. This research also explores gender differences in perception of aging, preparation for later life and related factors. For the purpose, the survey data was gathered from 424 middle aged (40's & 50's) citizens who live in Gwangju and Jeonnam, using structured questionnaire. The statistical methods used for data analysis are descriptive statistics, cross tables, t-test, correlations and regression with Spss/win 17.0 program. The major findings of this study are as follows: Most of the respondents perceive that the age of being aged is 65 or 70 years old. Respondents feel anxiety about health (84%), finance (57%) and roleless role (22%) of later life. Female group feel health anxiety more than male group. Many people perceive that social preparation for later life is better than financial preparation and physical preparation for later life. The result shows that female group perceives their physical preparation level more positively than male group generally. But, there were no differences in financial and social preparation between gender groups. Finally, the result shows the meaningful relationships between male group's perception of aging and financial preparation for later life. Monthly income is the most important variable predicting preparation for later life.

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Determinants of Middle Aged's Social Preparation for Later Life : Focused on Gender (중년층의 사회적 노후준비 결정요인분석: 성차를 중심으로)

  • Kim, Beag-Su;Lee, Jeong-Hwa
    • The Korean Journal of Community Living Science
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    • v.21 no.3
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    • pp.411-425
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    • 2010
  • The purpose of this study is to examine the middle aged social preparation for later life and to explore the effect of social activities and social relationships on social preparation for later life. This research is also focused on gender differences in social activities, social relationships and social preparation for later life. The survey data was gathered from 424 middle aged citizens who live in the Gwangju & Jeonnam area, using a structured questionnaire. The statistical methods used for data analysis were descriptive statistics, cross tables, t-test, correlations, and hierarchical regression with SPSS win 18.0 program. The major findings of this study are as follows: Most of the respondents perceive an importance of social activities and social relationships. Middle aged women enjoy leisure activities such as learning and religious activity more than men. Middle aged men engage in hobby activities more than women. And most of respondents perceive they are making an effort to keep a relationship with spouses, family & friends. The results show that there are no differences in social preparation for later life between gender groups, but the variables which have an effect in social preparation for later life are different between gender groups. Social activities and Social relationships play an important role in social preparation for later life of Middle aged men and women. At the same time, Social activities and Social relationships have more positive effect on the social preparation of women. Implications of the results are discussed.

Low-Latency Programmable Look-Up Table Routing Engine for Parallel Computers (병렬 컴퓨터를 위한 저지연 프로그램형 조견표 경로지정 엔진)

  • Chang, Nae-Hyuck
    • Journal of KIISE:Computing Practices and Letters
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    • v.6 no.2
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    • pp.244-253
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    • 2000
  • Since no single routing-switching combination performs the best under various different types of applications, a flexible network is required to support a range of polices. This paper introduces an implementation of a look-up table routing engine offering flexible routing and switching polices without performance degradation unlike those based on microprocessors. By deciding contents of look-up tables, the engine can implement wormhole routing, virtual cut-through routing, and packet switching, as well as hybrid switching, under a variety of routing algorithms. Since the routing engine has a piplelined look-up table architecture, the routing delay is as small as one flit, and thus it can overlap multiple routing actions without performance degradation in comparison with hardwired routers dedicated to a specific policy. Because four pipeline stages do not induce a hazard, expensive forwarding logic is not required. The routing engine can accommodate four physical links with a time shared cut-through bus or single link with a cross-bar switch. It is implemented using Xilinx 4000 series FPGA.

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