http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 권희경(H.K. Kwon) (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
김국철(K.C. Kim),석진익(J.I. Suk),권희경(H.K. Kwon) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.11
A spent nuclear fuel cask should safe in the case of most severe accident loading during transportation. Therefore, in order to verify the integrity of the shipping cask manufactured by doosan heavy industries for the first time in Korea, rapid loading K1C tests has performed as material property evaluation. In this paper, the dynamic fracture toughness obtained by rapid loading K<SUB>IC</SUB> tests is discussed. The procedure of the integrity evaluation of the shipping cask is as follow: First, the maximum flaw size for the full area of forging product of the shipping cask is measured by nondestructive examination. Second, the dynamic fracture toughness test is carried out at -40℃. Third, FEM is performed for the model of the shipping cask with the maximum size flaw measured by NDE under seismic loading. Finally, the integrity of the shipping cask is evaluated by comparing maximum stress intensity factor calculated by FEM with dynamic fracture toughness measured by the experiment. In the integrity evaluation, our company has carried out nondestructive examination and dynamic fracture toughness test, and GNB Company in Germany has carried out FEM analysis. From the evaluation, the integrity of shipping cask was confirmed.
-
울진 5, 6호기 원자력 발전소 원자로 소재 조사전 재료 특성
김국철(K. C. Kim),김정태(J. T. Kim),석진익(J. I. Suk),권희경(H. K. Kwon),성운학(U. H. Sung) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
It is necessary to verify the integrity of the reactor vessel in operating the nuclear power plant because the reactor vessel is irradiated continuously by neutrons during the in-service. In order to prevent the brittle fracture due to the irradiation embrittlement, at first, it is confirmed that the reactor vessel would be sufficiently integrated during the design life throughout the preirradiation baseline test. Then, the reactor vessel material is measured for reduction of material properties by the surveillance test in the instrumented irradiation capsule designed for simulating the environment of reactor vessel. For the integrity analysis of the reactor vessel, there are upper-self energy evaluation, pressurized thermal shock (PTS) analysis, and determination of the pressure-temperature limit curve (P-T curve) in accordance with USNRC and ASME criteria. For the PTS and P-T curve, the integrity should be verified against the brittle fracture even in case the reactor vessel has the defect with the size designated at USNRC. Therefore, reactor vessel materiel is required to have excellent fracture toughness. In order to ensure above criteria, the fracture toughness should be evaluated based on reference nil-ductility transition temperature, RT<SUB>NOT</SUB>. The RT<SUB>NOT</SUB> is determined from drop weigh test and impact test, and the reliability of RT<SUB>NOT</SUB> is confirmed from the static and dynamic fracture toughness test. In this study, preirradiation baseline test results were summarized, and investigated on fracture characteristics for Ulchin 5/6 nuclear power plants. This baseline test data will be used as reference data for surveillance.
-
권희경 한국전통과학기술학회 1998 한국전통과학기술학회지 Vol.4 No.1
The stone bodhisattva, which sits in an offering posture at Palgak guchung seok tab (octagonal nine story stone pagoda) standing in the yard of Woljong temple, was presumed to be manufactured in the 10th or 11th century. This bodhisattva is believed to be a Yakwang (medicine king) bodhisattva. The bodhisattva is characterized by the appearance in an offering posture with hands hold together, left leg raised and right leg laved down. The image of the bodhisattva is similar to those of the bodhisattva of Hansong temple and Shinbok temple in the Kangnung region. On the point of putting an tall jeweled crowns, these three bodhisattvas are of the same style. As the form of raising the left leg and laying down the right leg is identical to that of the bodhisattva of Shinbok temple, these bodhisattvas were thought generally to be the style of Kangnung region, Koryo Dynasty. The bodhisattva of Woljong temple has been considered, in general, to be made later than those of Hansong temple and Shinbok temple. However, in this study, the time when the bodhisattva of Woljong temple was built was proved to be in the 10th century as the bodhisattva offering Buddha's bones of Bubmun temple in Somseo province, China, reported to tie built in the later 9th century, is of the same style. The bodhisattva offering Buddha's bones of Bubmun temple is a bodhisattva of Esoteric Buddhism. Therefore, the bodhisattva of Woljong temple which is nearly the same style of that of the Bubmun temple is considered to be a bodhisattva of Esoteric Buddhism.
-
한국 최초의 경주시 황남동 출토 유리 용융 도가니 및 유리 구슬에 대한 연구
최주,안재호,황상주,권희경,김수철,도정만,박기훈,김선태 한국전통과학기술학회 1994 한국전통과학기술학회지 Vol.1 No.1
A piece of glass melting crucible whose inner face was lined with yellowish brown glass, a yellowish brown ellipsoidal bead and a greenish scrcew-shaped wound bead were unearthed in Kyongju city. These finds were dated to around the middle of the 6th century by pattern impressed earthenwares excavated in the same stratum. Chcmica analyses were carried out by means of energy diapersive spectrometry(EDS), atomic absorption analysis(AA), induced coupling plasma analysis(ICP) along with conventional wet analvsis. Also X-ray and elecrtron diffraction analvses were periomd in an attempt to identify any crystalline precipitates. Three glass items are classified iota lead-silica group showing the same compositions. This indicates that the two beads are from the same crucible. Ywllowish brown glass film contains 72.5% PbO and 25.2% SiO₂ and its softening point is 442℃ which is determined by differential scanning calorimeter(DSC). Melting point is found to be around 650℃ by practical measurement. Color differences in two beads are proved to be mainly due to copper contained in the glass, i.e., yellowish brown and greenish colors depend on reduction and oxidation atmosphere during melting, respectively. Chemical analysis shows that the glass melting crucible is a common earthenware.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
