Comparative evaluation of active vs passive system designs

Büchner, Helmut; Fabian, H.

doi:10.1016/0951-8320(94)90085-x

Cited by 9 publications

(2 citation statements)

References 1 publication

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“…There are many safety standby systems to mitigate consequences of an accident in NPPs. The entire reliability of safety standby systems greatly depends on the successful operation of some standby component which is supposed to move mechanically (Buchner and Fabian, 1994). Standby equipment does not provide any information for the perception of equipment condition because it is not in operation.…”

Section: Component Unavailability Reduction Through Monitoringmentioning

confidence: 99%

Emerging I&C Technologies Under the Shifting Regulatory Environment in South Korea

2015

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The role of probabilistic safety assessment (PSA) has been supplementary and riskinformed applications based on the insight from PSA have also been utilized limitedly in the licensing process for nuclear power plants (NPPs) in South Korea. However, as the technical significance of PSA is getting increased, PSA has become a mandatory part of Safety Analysis Reports and Periodic Safety Review. It is worthwhile to highlight the role of emerging instrumentation and control (I&C) technologies including human-machine interface (HMI) in developing more credible and realistic PSA models. Particularly, it is expected that the information technology (i.e., software) embedded in digital I&C can adjust over-and under conservatism in analyzing risk. In this study, authors proposed the cases which would be able to significantly reduce risk if advanced I&C supported by information technologies is applied. In regard, the several enabling techniques and their effects are proposed. In order to improve the commercial competitiveness of NPPs, the need of collaboration and synergetic outcome of I&C, HMI, and PSA should be emphasized.

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Section: Component Unavailability Reduction Through Monitoringmentioning

confidence: 99%

Emerging I&C Technologies Under the Shifting Regulatory Environment in South Korea

2015

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“…General passive systems and strategies however have a critical limitation, especially for passive injection systems. As these systems use gravity as their driving force (Buchner and Fabian, 1994), it is difficult to inject coolant in a passive way in high-pressure conditions, and thus depressurization is needed to inject coolant to the reactor coolant system (RCS).…”

Section: Introductionmentioning

confidence: 99%