With many years of experience, a professional approach to work, and a strong track record,
we are a reliable and trustworthy business partner. The satisfaction and recommendations of
our existing customers are what drives our work and development forward.
Of the few hundred projects we successfully completed over the last 20 years, the following deserve a special mention:
RECONSTRUCTION OF THE 400 kV SWITCHING SUBSTATION OF THE KRŠKO NPP
REPLACEMENT OF THE MAIN GENERATOR STATOR AT THE KRŠKO NPP
- reconstruction of 400 kV transformer bays SYCA01 and SYCA02,
- reconstruction of 400 kV collector substations,
- reconstruction of 400 kV transmission line bays Maribor, Tumbri 1 and Tumbri 2 with interlocking transmission lines at the 400 kV Krško NPP switching substation.
Subcontractors involved in the replacement of the main generator stator at the Krško Nuclear Power Plant and the corresponding control systems.
EXTENSION OF THE FIRE ALARM SYSTEM IN THE TECHNICAL SECTION OF THE KRŠKO NPP
The existing fire alarm system was replaced and upgraded to enable more accurate ways of
determining the location of fires. The existing fire alarm system was extended to locations
that have not been covered by the originally built-in system.
Work was carried out during the power plant's regular operation and during scheduled
maintenance outages in 2011, 2012 and 2013.
REPLACEMENT OF THE KRŠKO NPP ALARM SYSTEM
The dated alarm system in the main control room was replaced by a fully redundant, state-of-
the-art digital alarm system.
UPGRADE OF THE BACKUP POWER SUPPLY SYSTEM – INSTALLATION OF A NEW BACKUP DIESEL GENERATOR
Providing an alternative power source in the event of a system-wide AC power outage, the
system upgrade is an improvement to the power plant's backup power supply system. For this
purpose, a diesel generator along with a corresponding control system was installed in a new
EXTENSION OF THE SYSTEM OF COOLING TOWERS
To accommodate for changes in the power plant and the surrounding environment, select
technical solutions were deployed to improve the tertiary loop cooling system at the Krško
NPP. Four new cooling tower cells were installed, and all the electrical equipment of the
cooling towers system was replaced.
REPLACEMENT OF THE TURBINE CONTROL AND PROTECTION SYSTEM
The old digital electrohydraulic (DEH) system of the turbine control system was replaced by a
new programmable digital electrohydraulic (PDEH) system.
REPLACEMENT OF THE PROCESS WATER PRE-TREATMENT AND TREATMENT TECHNOLOGY
OPTIMIZATION OF TEMPERATURE MEASUREMENT IN THE REACTOR COOLANT SYSTEM
Resistance temperature detectors (RTDs) were installed directly in the primary coolant pipe.
To accommodate for changes to the primary coolant temperature measurement system,
protection boxes were also upgraded with new controller cards.
INSTALLATION AND CONNECTION OF NEW GT2 AND GT1 TRANSFORMERS
The two existing main transformers were replaced in order to reach full capacity. Also installed was a continuous gas and transformer monitoring system.
UPGRADE OF THE REACTOR COOLANT PUMP MOTOR
The electric motor of the reactor coolant pump was reconditioned and upgraded. BIS screens (monitoring instrumentation) for monitoring bearing temperature, bearing oil levels and motor vibration were upgraded.