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Water supply
Brno

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Klient

ČEZ Nuclear Services

Industry

Energy/ Nuclear

Year

2024
The Challenge: 

ČEZ required a safety-critical cooling control system for the Temelín Nuclear Power Plant's backup cooling infrastructure. The challenge was multi-faceted: Extreme reliability requirements: The system must operate flawlessly for 40+ years with 99.99% uptime. Nuclear Safety Grade 3 compliance: All components must meet stringent 10CFR50 Appendix B quality standards. Redundant fail-safe architecture: Triple-redundant control logic with automatic switchover in case of component failure. Harsh environmental conditions: Equipment must operate in high radiation zones (-20°C to +60°C ambient temperature). Real-time response: Control system must react within 100ms to prevent thermal excursions. Seismic qualification: All hardware must withstand Zone 4 seismic events per IEEE 344 standards

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Primary Hardware

3x Siemens S7-1518F-4 PN/DP (TMR)

Software Platform

TIA Portal V18 + WinCC Pro 8.0

Safety Standards

IEC 61508 SIL-3, 10CFR50 App.B

System Uptime

99.994% (40-year design)

Response Time

< 85ms (spec: 100ms)

I/O Points

2,400+ analog/digital signals

Temperature Range

-20°C to +65°C operational

Seismic Rating

IEEE 344 Zone 4 qualified
Engineering
Gallery
service-7
service-1
service-5
service-4
service-3
service-2
service-6
service-7
service-1
service-5
service-4
service-3
service-2
service-6

Impact & Results

Measurable outcomes and performance metrics

+35%

Increase in Cooling
System Efficiency

0

Unplanned Downtime
During 18-Month Pilot

100%

Compliance with Nuclear
Safety Protocols

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