• 대한전자공학회논문지
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• 제13권1호
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• pp.1-10
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• 1976

원자로의 안전계통에 이용되는 2-out of-3 내시회로 및 파고선별기에 관해 인술하고 상세한 해석을 하였다. 1-out of-m 동시회로의 안전신뇌도 및 확사비상정지신뇌도에 관한 식을 유도하여 적정한 1의 값을 구하였다. 2-out of-3 동시유로는 펄스 합산 방법을 이용하여 설계하였으며 매우 간단한 원리로 동작한다. 파고선별기는 전 선렬영역에 걸쳐 좋은 직선성 및 threshold 안정도를 가진다. A 2-out of-3 coincidence circuit and a discriminator to be used in the safely systems in nuclear reactors are described and analyzed in detail. The expressions for the reliability and the spurious scram reiliability of 1·out of-m coincidence logic in general are derived and the optimum value of 1 is assessed. The coincidence circuit is designed by making use of the pulse-summing method and is very simple in principle. The discriminator has good linearity in in the whole discrimination range and good threshold stability.

• 전기학회논문지
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• 제57권8호
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• pp.1318-1326
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• 2008

This paper proposes an alternative methodology for deciding an optimum deterministic reliability level (IRR; Installed Reserve Rate) by using probabilistic reliability criterion (LOLE; Loss of Load Expectation). Additionally, case studies using the proposed method induce the characteristics of relationship between the probabilistic reliability index (LOLE) and deterministic reliability index (IRR) for 2008 and 2010 years in Korea power system. The case study presents a possibility that an optimum IRR level in Korea can be assessed using the proposed method. Korea power system has been using the LOLE criterion to determine the adequacy of installed capacity (ICAP) requirement. The criterion in Korea is that the loss of load expectation shall not exceed the available capacity more than five day in ten years (=0.5[days/year]), The probabilistic reliability evaluation and production cost simulation program which is called PRASim is used in order to evaluate the relationship and optimum IRR in this paper.