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노영진(Y. J. Roh),이선기(S. K. Lee),박준현(J. H. Park),이상국(S. G. Lee) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.11
Active mechanical equipment such as pumps and valves used in nuclear plant systems should be qualified for operation and integrity in accordance to the requirements of ASME QME-1 or KEPIC MF. However qualification test for active mechanical equipment is being conducted in abroad because there are no large capacity test facilities for functional qualification of valve under high temperature-high pressure within the country. The purpose of this study is to introduce qualification methods and procedures for valves used in nuclear plant systems by functional qualification test facilities under high temperatures and pressure in accordance to the Code of ASME QME-1.
김선진(S. J. Kim),공유식(Y. S. Kong),노영진(Y. J. Roh) 한국동력기계공학회 2005 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The statistical considerations of short time creep characteristic values were performed by elevated temperature creep tests for STS304 stainless steel. From creep tests performed by constant stresses at 600, 650 and 700℃ elevated temperature, the scatters and distribution characteristics were observed in rupture time, total creep strain, steady state creep rate and initial strain. The effect of temperature on the scatter of rupture time was smaller at 700℃, and the effects of stress on the scatter of rupture time was smaller with increasing stresses. The distributions of short time creep characteristic values were well followed in 2-parameter Weibull.