Nuclear Plant Reliability & Man-Machine Interface Design Lab.
Improvement of Emergency Operating Guidelines
Emergency operating guidelines provide technical
guidance for the development
specific emergency operating
guidelines provide the actions necessary for mitigation of plant events that necessitate a reactor trip and initiated in Mode 3 or
We know that EOG is
closely related to safety of plant
through Fukushima accident. We are performing researches for enhancing the
plant safety by upgrading EOG. Innovative nuclear plant is under development in
Korea. Thus well-matched EOG must be developed in consideration of new passive
safety equipment use. We are developing a new EOG for hybrid safety injection
tanks and passive emergency core cooling systems.
Software and Network Reliability
There are many reliability and risk
issues in safety-critical digital control systems.
By identifying and analyzing those
issues, we can suggest countermeasures and eliminate potential risk factors. Quantification of software reliability is one of the
most important issues. Most digital systems are adopting software to make the
system behave as designed, thus the reliability of the system is directly
related to the software faults. The method of quantification of software
reliability may include software testing. However, the behavior and the
reliability criteria of the software used in the NPP are different from
other software, so the test case generation method should be newly deve...
Automation of Safety Function
A human operator of a nuclear power
plant must handle a large number of dynamic
information sources and reach a decision to
achieve a system goal efficiently and
safely. Automation is one of the best ways
which reduce human operator’s workload
in main control room.
The automation must be implemented in a balanced manner with manual safety
actions for achieving minimum risk. The effect
of application of automation should
by proper probabilistic safety
assessment of which method is
currently under development in this study.
Monitoring Method Development for Safety Component on Standby State
Most of the components of which
successful operation on demand is a crucial factor of safety are in standby mode. Generally it is very difficult to detect
the failure of standby components since their operation cannot be
observed. Periodic testing is currently the only mean to cope with this
uncertainty. In this study, a concept of a monitoring method for standby safety
components is proposed in order to raise its availability. Basically,
availability of a standby component can be improved by monitoring some
detectable random failures and avoiding possible
aging caused by actual operation
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