VGB POWERTECH 7 (2021) - International Journal for Generation and Storage of Electricity and Heat
VGB PowerTech - International Journal for Generation and Storage of Electricity and Heat. Issue 7 (2021). Technical Journal of the VGB PowerTech Association. Energy is us! Optimisation of power plants. Thermal waste utilisation.
VGB PowerTech - International Journal for Generation and Storage of Electricity and Heat. Issue 7 (2021).
Technical Journal of the VGB PowerTech Association. Energy is us!
Optimisation of power plants. Thermal waste utilisation.
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Continuation <strong>of</strong> table 8 <strong>VGB</strong> PowerTech 7 l <strong>2021</strong><br />
Tab. 11. Selected equipment <strong>for</strong> fragility analysis.<br />
Group Category Equipment Mitigation Function Selected equipment<br />
Electrical Equipment Offsite power - -<br />
Structures <strong>and</strong> Tanks Large flat-bottomed tank Auxiliary feed water supply Condensate storage tank<br />
I<br />
II<br />
High pressure injection<br />
Low pressure injection<br />
Diesel generator fuel supply<br />
Refueling water storage tank<br />
Refueling water storage tank<br />
EDG storage tank<br />
Electrical Equipment 480 VAC Motor Control Center (MCC) /<br />
Switchgear / Bus (unanchored)<br />
Plant control<br />
Load center<br />
Motor control center<br />
Electrical Equipment 5 kV+ AC Bus / Switchgear (Unanchored) Plant control Switchgear<br />
Electrical Equipment DC Motor Control Center (MCC) / Switchgear<br />
/ Bus (Unanchored)<br />
Plant control<br />
DC Panel<br />
Electrical Equipment Panel (Electric or Instrument) (Unanchored) Plant control Electrical panel<br />
Pump & Compressors Diesel-driven pump (non-safety) - -<br />
Structures <strong>and</strong> Tanks Turbine building - -<br />
Structures <strong>and</strong> Tanks Other non-safety buildings - -<br />
Piping Buried piping (non-safety pipe) - -<br />
Piping Distributed piping system (welded steel pipe) - -<br />
Electrical Equipment Cable tray - -<br />
Pump & Compressors Motor-driven pump Auxiliary feed water supply AF motor driven pump<br />
Component cooling water supply<br />
Essential chilled water supply<br />
Diesel generator fuel supply<br />
High pressure injection<br />
Low pressure injection<br />
Ultimate heat sink<br />
Component cooling water pump<br />
Essential chilled water pump<br />
EDG fuel pump<br />
HPSI pump<br />
LPSI pump<br />
NSCW pump<br />
Pump & Compressors Turbine-driven pump Auxiliary feed water supply AF turbine driven pump<br />
Electrical Equipment 480 VAC Motor Control Center (MCC) /<br />
Switchgear / Bus (Anchored)<br />
Plant control<br />
Load center<br />
Motor control center<br />
Piping Distributed piping system (cast iron pipe) - -<br />
Structures <strong>and</strong> Tanks Small tank Component cooling water supply Component cooling surge tank<br />
HX & HVAC Chiller Essential chilled water supply Chiller<br />
Piping Small LOCA (SLOCA) - -<br />
HX & HVAC Air h<strong>and</strong>ling unit (AHU) / Room Cooler / AF pump room cooling<br />
AF room AHU<br />
Fan<br />
Diesel generator room cooling<br />
EDG room AHU<br />
Reactor containment cooling<br />
Ultimate heat sink pump room cooling<br />
RCFC fan<br />
NSCW room AHU<br />
Electrical Equipment Panel (Electric or Instrument) (Anchored) Plant control Electrical panel<br />
Electrical Equipment Relay Chatter Failure (During Seismic Event) Plant control Electrical panel<br />
Pump & Compressors<br />
Large vertical, centrifugal pump<br />
(motor-driven, non-safety)<br />
- -<br />
Electrical Equipment Batteries Plant control Electrical panel<br />
Structures <strong>and</strong> Tanks Reactor internals <strong>and</strong> core assembly - -<br />
Piping Buried piping (safety pipe) - -<br />
Electrical Equipment Trans<strong>for</strong>mer (Indoor) - -<br />
Structures <strong>and</strong> Tanks Containment building / drywell - -<br />
Electrical Equipment Emergency Diesel Generator (EDG) Emergency power supply Emergency diesel generator<br />
seismic equipment <strong>and</strong> human error are<br />
excluded among the results <strong>of</strong> the PSA importance<br />
<strong>of</strong> internal events. Finally, equipment<br />
is derived through cross-examination<br />
between the equipment required <strong>for</strong> the<br />
function <strong>of</strong> the mitigating equipment derived<br />
from an internal event <strong>and</strong> the equipment<br />
group subject to fragility analysis.<br />
5. Case study <strong>for</strong> the equipment<br />
selection methodology<br />
In this paper, we compare <strong>and</strong> analyze the<br />
seismic PSA results <strong>of</strong> the reference nuclear<br />
power plant using the proposed methodology.<br />
Existing PSA results could not be considered,<br />
as detailed data on the walkdown<br />
could not be collected. However, even if the<br />
walkdown is excluded, the results are sufficient<br />
to demonstrate the effectiveness <strong>of</strong><br />
the methodology proposed in this paper.<br />
The first step is the analysis <strong>of</strong> site-specific<br />
PSHA results. The review <strong>of</strong> the corresponding<br />
hazard curves indicates that the<br />
probability <strong>of</strong> earthquake occurrence is<br />
68