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Review of Emergency Procedures for CANDU Reactors
김성래,권종수,조주현,박성훈,남상구,Kim, S.R.,Kwon, J.S.,Cho, J.H.,Park, S.H.,Nam, S.K. Korean Nuclear Society 1995 Nuclear Engineering and Technology Vol.27 No.4
The generation, verification and validation of Emergency Procedures for Nuclear Power Plant is a difficult and complex process. Atomic Energy Control Board(AECB) requires that emergency procedure and plan be produced before obtaining the Operating License, that is, detailed plans and procedures to handle emergency situations for both on-site actions and off-site actions be developed. In this report Emergency Operating Procedures Standard for Canadian Nuclear Utilities which makes reference to U. S. practices and the current direction of emergency procedures for CAN-DU reactors are reviewed and compared based on scope(events covered), methodology (event-oriented or symptom-oriented or hybrid) and format(method of presentation) preponderantly, and an attempt is made to integrate these procedures and as a result the recommended strategy for Wolsong unit 2, 3, & 4 is presented as event-specific procedures, generic procedures(when event is not diagnosed) and whose format is combination of logic diagram and text.
김성래(S. R. Kim),이채욱(C. W. Lee),김문영,김찬묵(C. M. Kim),임홍재(H. J. Yim) 한국소음진동공학회 2012 한국소음진동공학회 학술대회논문집 Vol.2012 No.4
In this paper, we propose the efficient technique that reduces the number of spot-welds and increases the structural rigidity by using the topology optimization technique. Eigen value analysis is used to evaluate the rigidity of the optimized model. As a first step, the topology optimization is performed to find optimal spot-weld distributions. In this study, the design objective is to maximize the weighted frequencies. The volume fractions of the weld components are used as design constraints, and also the densities of each element in the individual design space are used as design variables. And then, to consider the possibility of spot-weld failure, the contribution rate analysis was performed by using the orthogonal array method of DOE. The spot-welds in the rear panel part are reinforced according to estimation results of the contribution rate analysis. Finally, we obtained optimized spot-weld layout model which has the reduced number of spot-welds and the improved dynamic stiffness.
가솔린엔진의 밸브오우버랩 동안 밸브타이밍이 역류에 미치는 영향
오승묵(S.M.Oh),황정선(J.S.Hwang),강건용(K.Y.Kang),정용일(Y.I.Jeong),이수원(S.W.Lee),김성래(S.R.Kim),이창길(C.G.Lee) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
The backfire could be caused by the backflow of hot burned gas from the cylinder into the intake port. Especially. in the case of gaseous fuel engines. the possibility of backfire occurrence is higher since the ignition temperature is lower than that of liquid fuel.<br/> In this study. prior to conversion of gasoline engine to LPG engine. the backflow was measured at four different valve timings(type Ⅰ,Ⅱ,Ⅲ,Ⅳ) in a gasoline engine. To quantify the amount of backflow. hot wire anemometry was adopted and its signal was analyzed as the change of temperature and flow in the intake port.<br/> It was found that the backflow was decreased with increasing the engine load. When the intake valve timing was retarded. the backflow was not found nearly and the power was decreased a little at low engine speed.<br/>
파종기(播種機) “복흥호(復興號)”에 대(對)한 연구(硏究)
한성김 ( S. K. Han ),김성래 ( S. R. Kim ) 한국농공학회 1964 韓國農工學會誌 : 전원과 자원 Vol.6 No.1
There are many types of seeders which have :good mechanical function and are operated by farm tractors in other countris. Those mechanized seeders are not useful in Korea due to the lack of farm tractors and the small size of the Korean farm. At the present time, all of the farmers in Korea are seeding grain by hand since there is not a hand seeder which is available for their use. Korean farmers have a low effiency in the seeding operation and have lower product yield caused by the lack of uniform plant population and irregular spacing of grain seeds. Uniform population and spacing of crops results in uniform crop growing and will increase crop production. This study was conducted to design and test a simple low cost hand-seeder which could be used by Korean farmers. In 1962 a number of hand-seeders were made and tested for hand seeding of barley and wheat. One such design was proved to be superior for hand seeding of grains, and named “Buhung” hand-seeder by The Ministry of Agriculture and Forestry. Its major characterstics are as follows: 1. The seeder can be used for hand seeding of grains with simple hand operation. 2. Uniform population and spacing of seed is obtained and the rate of seeding can be adjusted easily. 3. The seeder is made of wood except for a few parts of steel and the construction is very simple. 4. It is possible that farmers can make the seeder themselves with simple tools. 5. The seeder is also useful as a fertilizer applicator. The following results can be expected by using the seeder. 1. 30-40 % of seeding time can be saved by- use of this seeder as compared with hand seeding. 2. Uniform population and spacing is obtained by use of the seeder. 3. The seeder is very low in cost (\130 estimated) so that many farmers can use it and improve their crop yields.