• 한국압력기기공학회 논문집
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• 제12권1호
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• pp.1-10
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• 2016

The number of nuclear power plants operating in Korea was 24 as of year 2015. Nine units out of 24 units have been operated for a period over 20 years. Kori unit 1 has been in operation for 40 years, and an extended operation for Wolsong unit 1 was decided in 2015. There has been reported some crackings in reactor internals in PWR have been reported in Europe, USA, Japan and Korea, and some of them were replaced with new one. Repair and replacement technologies for the reactor internals have been developing in order to meet the regulatory requirements for long term operation in Korea. The technologies will also be used for the exported nuclear units. It is required to review degradation history of the reactor internals worldwide as a part of the degradation management program development. Schematics of reactor internals designed and supplied by Westinghouse, Framatome and Combustion Engineering are described herein. Materials degradation history of reactor internals of PWR plants in USA, Japan and Europe is surveyed and summarized. Some events from Korean plants are also described. Aging management strategy for the internals is suggested.

• 산업융합연구
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• 제21권5호
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• pp.109-122
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• 2023

본 연구의 목적은 노인의 건강증진행위가 성공적 노후에 미치는 영향을 살펴보고, 건강증진행위가 성공적 노후로 가는 경로에 성공적 노화 인식과 생활만족도가 어떠한 매개역할을 하는지를 구체화하고 성공적 노화 인식과 생활만족도가 성공적 노후에 유의미한 영향에 관해 알아보고자 하는 것이었다. 경기도 노인복지관을 이용하는 노인을 대상으로 설문조사를 실시하였으며, 최종 250부를 분석에 사용하였다. 자료분석은 SPSS Win 25를 활용하여 빈도분석, 기술통계, t-test와 일원배치 분산분석, 상관분석을 실시하였다. 매개효과분석을 통해 건강증진행위와 성공적 노후 간에 설정한 인과 관계를 검증하고 나아가 성공적 노화 인식과 생활만족도가 이러한 인과관계에 매개효과가 있는지를 검증하였다. 연구 결과 노인들의 건강증진행위는 성공적 노화인식, 생활만족도, 성공적 노후에 영향을 주었고, 노인들의 성공적 노화 인식은 건강증진행위와 성공적 노후 간에 매개 역할을 하였으나 생활만족도는 건강증진행위와 성공적 노후 간에 매개 역할을 하지 못했다. 함의는 건강증진 지원 전문가, 모델 및 프로그램 개발, 홍보 및 교육기회 제공이 필요하다. 노인의 다양한 유·무형적 요인을 고려한 지원이 필요하고, 경제 및 현재 건강 수준에 맞게 정책이 마련되어야 한다.

• 디지털융복합연구
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• 제16권1호
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• pp.93-101
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• 2018

본 연구에서는 한국 베이비붐 세대의 은퇴 후 준비 상태에 대해 이해하고 이들의 사회참여 태도가 성공적 노후에 미치는 영향에 대해 노후준비의 매개효과를 확인하여 이에 따른 대안을 제시하고자 하였다. 연구방법은 설문조사를 실시하였으며, 수집된 자료의 분석은 SPSS Win 23.0 프로그램을 이용하여 빈도분석, 기술통계분석, 상관분석, 위계적 다중회귀분석을 시행하였다. 연구 결과 첫째, 사회참여 태도는 성공적 노후에 영향을 미치는 것으로 나타났다. 둘째, 사회참여 태도는 노후준비에 영향을 미치는 것으로 나타났다. 셋째, 노후준비가 성공적 노후에 영향을 미치는 것으로 나타났다. 넷째, 사회참여 태도와 성공적 노후간의 관계에서 노후준비가 매개효과가 있는 것으로 나타났다. 마지막으로 본 연구의 의의와 제한점 및 추후 연구과제에 대해 논의하였다.

• 디지털융복합연구
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• 제17권10호
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• pp.339-348
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• 2019

본 연구는 노인의 기본심리욕구, 자아통합감, 문화역량이 성공적 노화에 미치는 영향을 파악하기 위한 서술적 조사연구로, 대상자는 2018년 12월부터 2019년 1월까지 J와 S시, G광역시에 소재한 16곳의 노인종합복지센터을 이용하는 60세 이상 남녀노인 187명을 대상으로 하였다. 자료 분석은 SPSS 23.0 프로그램을사용하여 기술적 통계, t-test, ANOVA, Pearson's correlation coefficients, 다중회귀분석을 시행하였다. 성공적 노화는 기본심리욕구, 자아통합감, 문화역량과 양의 상관관계가 있었다. 노인의 성공적 노화에 대하여 자아통합감(${\beta}=.372$, p<.001), 문화역량(${\beta}=.410$, p<.001), 기본심리욕구의 하위 변수인 관계성(${\beta}=.168$, p=.003)이 71.1%의 설명력을 보였다. 그러므로 노인의 성공적 노화를 위한 자아통합감, 문화역량, 관계성 증진을 위한 사회문화 심리적 프로그램 개발이 필요하다.

• 한국치위생학회지
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• 제13권4호
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• pp.685-692
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• 2013

Objectives : Rapid aging is a big social issue and aging influences on the quality of life in elderly people. Oral health in elderly people related to the general health condition and it is necessary to improve the quality of life in the elderly people. The aim of the study is to investigate the influencing factors of oral health in the elderly people. Methods : Self-reported questionnaire included general characteristics, subjective health and oral condition and denture use. Subjects were 177 elderly people in Gumi, Korea. SAS (Ver.9.2) Program was used for the collected data to perform frequency analysis, cross tabulation, t-test and ANOVA. Results : Higher subjective oral health score were found in younger age, highly educated, high income, and married elderly people. Elderly people who were older and had low education and low income tended to use denture Conclusions : It is necessary to develop oral health care management and prevention program for the elderly people.

• 한국압력기기공학회 논문집
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• 제6권2호
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• pp.28-33
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• 2010

As a part of license renewal for the continued operation of Wolsong unit 1, the periodic safety review report was submitted near the end of design lifetime, 2012, and now is under reviewing. Major components of primary system such as pressure tubes, feeder pipes and so on are being replaced and many components of secondary system are also being repaired. So the license renewal of Wolsong unit 1 is expected to be acquired without significant issues. But on the other hand, steam generators of Wolsong unit 1 had the good performance and therefore the replacement and repair for the steam generator are not needed. Recently it is reported that some cracks were detected in a few of european steam generator with Alloy 800 tubes and the cause of cracks was the outer diameter stress corrosion cracking(ODSCC) due to the concentration of chemical impurities on the outer surface of tube. Accordingly the overall review on this issue was performed. The long-term operation is likely to results to form the concentration mechanism for the tube corrosion as the sludge build-up in the secondary side of steam generator and the crack in the crevice between tube and tube-sheet and expansion transitions is apt to be occurred. In this paper, the history of steam generator inspection and operation of Wolsong unit 1 are reviewed and the reliability of steam generator tube is evaluated and the steam generator aging management program for Wolsong unit 1 is introduced.

• 웰빙융합연구
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• 제1권1호
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• pp.21-26
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• 2018

Modern society has become an aging society, and the National Statistics Office(NSO) expects that Korea will be also an aging society by 2019, that is, people over the age of 65 will account for 14 percent from the total population. In addition, the increase of labor flexibility is also one of the dramatic features in modern society. However, this social shift have unpredictable results, that is, the advent and increase of grandparent and grandchildren family. Modern medical technology has given Koreans longer expectancies, and structural and economic changes in society have brought early retirement. One of the main reasons that grandparent and grandchildren family increase is below an average of two children per family. There are various services available such as Health support center, Dream start center, Youth support center, Community child center, and Community welfare center. Besides, schools operates various programs for grandparent and grandchildren family with social workers and school counselors. But, most of all, what is necessary is a change of perspective on them. Basically, we need to develop a clear perspective on grandparent and grandchildren family as a not dismantling family type but alternative family type with creating a separate program or service

• 한국경영과학회지
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• 제42권1호
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• pp.29-41
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• 2017

Korea is expected to become a super-aged society by 2050. Given an aging population and the increasing pressure for the early retirement, a sufficient social safety net for elderly population becomes important. The Korean government introduced public reverse mortgage program in 2007, which is a product for aging seniors and the elderly, The number of reverse mortgage subscribers has also steadily grown. The demand continues to grow, but the reverse mortgage over a long period of time is a highly uncertain and risky product in the position of guarantee or lending institution. Thus, suitable demand prediction of the reverse mortgage subscribers is necessary for stable and sustainable operation. This study uses a Bass diffusion model to forecast the long-term demand for reverse mortgage and provides insight into reverse mortgage by forecasting demand for stability and substantiality of the loan product. We represent the projections of new subscribers on the basis of the data obtained from Korea Housing Finance Corporation. Results show that potential market size of Korean reverse mortgage reaches approximately 760,000-1,160,000 households by 2020. We validate the results by comparing the estimate of the cumulative number of subscribers with that found in literature.

• 대한기계학회논문집A
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• 제34권4호
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• pp.495-499
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• 2010

이 연구에서는 우리나라 CANDU형 원전의 계속운전 규제지침을 개발하였다. CANDU 600 로형인 월성 1호기는 2012년에 30년 설계수명에 도달한다. 설계수명이후에 계속운전을 원하는 원전 사업자는 11개 인자를 포함하는 주기적안전성 평가 보고서를 제출해야 하며, 추가로 다음 사항에 대한 보고서를 제출해야 한다. (1) 경년열화 관리에 대한 범위 및 사전 검토 결과 (2) 경년열화 관리 프로그램 (3) 계속 운전기간을 포함하는 시간제한 경년열화 수명평가, (4) 운전경험 및 주요 연구결과의 반영. 이 연구에서는 상기 항목에 대한 54개의 규제지침이 개발되었다.

• Corrosion Science and Technology
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• 제17권6호
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• pp.317-323
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• 2018

Assumptions have always been that wall thinning on the secondary side piping in nuclear power plants is mostly caused by Flow-Accelerated Corrosion (FAC). Recent studies have showed that wall thinning on the secondary side piping is caused by Liquid Droplet Impingement Erosion (LDIE), Solid Particle Erosion (SPE), cavitation, and flashing. To manage those aging mechanisms, several software such as CHECWORKS, COMSY, and BRT-CICERO have been used in nuclear power plants. Korean nuclear power plants have been using the CHECWORKS program since 1996 to date. However, many site engineers have experienced a lot of inconveniences and problems in using the CHECWORKS program. In order to work through the inconveniences and to remedy problems, KEPCO-E&C has developed a "3D-based pipe wall thinning management program (ToSPACE)" based on the experience of over 30 years in relation to the pipe wall thinning management. This study compares the results of FAC and LDIE analysis using both the CHECWORKS and ToSPACE programs with respect to validation of the wall thinning analysis results.