• 제목/요약/키워드: SMART MCP

검색결과 27건 처리시간 0.028초

SMART 연구로 주냉각재펌프의 검증시험 (Qualification Test of a Main Coolant Pump for SMART Pilot)

  • 박상진;윤의수;오형우
    • 대한기계학회논문집B
    • /
    • 제30권9호
    • /
    • pp.858-865
    • /
    • 2006

  • SMART Pilot is a multipurpose small capacity integral type reactor. Main coolant pump (MCP) of SMART Pilot is a canned-motor-type axial pump to circulate the primary coolant between nuclear fuel and steam generator in the primary system. The reactor is designed to operate under condition of $310^{\circ}C$ and 14.7MPa. Thus MCP has to be tested under same operating condition as reactor design condition to verify its performance and safety. In present wort a test apparatus to simulate real operating situations of the reactor has been designed and constructed to test MCP. And then functional tests, performance tests, and endurance tests have been carried out upon a prototype MCP. Canned motor characteristics, homologous head/torque curves, coast-down curves, NPSH curves and lift-time performance variations were obtained from the qualification test as well as hydraulic performance characteristics of MCP.

  • https://doi.org/10.3795/KSME-B.2006.30.9.858 인용 PDF KSCI

일체형원자로 SMART 냉각재순환펌프의 성능예측 (Performance Prediction of Main Coolant Pump in Integral Reactor SMART)

  • 김민환;박진석;김종인
    • 한국전산유체공학회:학술대회논문집
    • /
    • 한국전산유체공학회 2001년도 추계 학술대회논문집
    • /
    • pp.118-125
    • /
    • 2001

  • The performance prediction of SMART MCP was performed using a computational fluid dynamics code. General capacity-head performance curve of MCP, which is provided to other design branches as design input, was obtained and it showed the typical type of axial pump performance curve. When four MCPs operate in parallel and one of them stops while the others continue to operate, SMART requires reduced power operation. A procedure for predicting the performance of SMART MCP for that case was developed and verified with available experimental data. An analysis based on the developed procedure was performed for two cases; the impeller of sloped MCP is fixed or free to rotate in reverse direction. According to the results, $73\%$ flow rate of normal operation enters the reactor core in the case of the locked impeller. In case of the impeller free rotation, the flow rate entering the reactor core is $62.8\%$.

  • PDF

Comparative effect of genistein and daidzein on the expression of MCP-l, eNOS, and cell adhesion molecules in TNF-${\alpha}$-stimulated HUVECs

  • Cho, Hye-Yeon;Park, Chung-Mu;Kim, Mi-Jeong;Chinzorig, Radnaabazar;Cho, Chung-Won;Song, Young-Sun
    • Nutrition Research and Practice
    • /
    • 제5권5호
    • /
    • pp.381-388
    • /
    • 2011

  • We compared the effects of genistein and daidzein on the expression of chemokines, cell adhesion molecules (CAMs), and endothelial nitric oxide synthase (eNOS) in tumor necrosis factor (TNF)-${\alpha}$-stimulated human umbilical vascular endothelial cells (HUVECs). TNF-${\alpha}$ exposure significantly increased expression of monocyte chemoattractant protein (MCP)-l, vascular adhesion molecule (VCAM)-1, and intercellular adhesion molecule-1. Genistein significantly decreased MCP-l and VCAM-l production in a dose-dependent manner, whereas CAM expression was not significantly lowered by genistein treatment. However, daidzein slightly decreased MCP-l production. The effects of genistein and daidzein on MCP-l secretion coincided with mRNA expression. Pre-treatment with either genistein or daidzein elevated eNOS expression and nitric oxide production disturbed by TNF-${\alpha}$ exposure. A low concentration of isoflavones significantly inhibited nuclear factor (NF)${\kappa}$B activation, whereas a high dose slightly ameliorated these inhibitive effects. These results suggest that genistein had a stronger effect on MCP-l and eNOS expression than that of daidzein. Additionally, NF${\kappa}$B transactivation might be partially related to the down-regulation of these mRNAs in TNF-${\alpha}$-stimulated HUVECs.

  • https://doi.org/10.4162/nrp.2011.5.5.381 인용 PDF KSCI