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 25 years, the following deserve a special mention:
REPLACEMENT OF THE DEH TURBINE CONTROL SYSTEM, TURBINE EMERGENCY TRIP SYSTEM AND MSR (MOISTURE SEPARATOR REHEATER) CONTROL
The old digital electrohydraulic (DEH) system of the turbine control system was replaced by a new programmable digital electrohydraulic (PDEH) system.
ENHANCEMENT OF THE EMERGENCY POWER SUPPLY
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 building.
PRESSURIZER PORV BYPASS
Modification 1025-RC-L, “Pressurizer PORV Bypass” is the one from Krško Safety Upgrade
The pressurizer PORV bypass system consists of two motor operated gate valves, Two electrical penetrations assemblies (EPA) installed in existing spare containment penetrations.
CONSTRUCTION OF EMERGENCY CONTROL ROOM – REMOTE SHUTDOWN CAPABILLITIES (on going)
The main goal is relocation of control loops for 1E equipment (pumps, fans, valves) from Shutdown Panels (SDP) to new Emergency Control Room (ECR). Complete Emergency Control Board was installed in new loacation and connected to the main island with 130km of cables.
UPGRADE OF BB1 ELECTRICAL POWER SUPPLY (on going)
Part 1 in 2: Purpose of implementation of BB1 Electrical Power Supply is to support the
installation of the Remote Shutdown Capabilities (RSC) and to enable electrical power supply for the Safety Upgrade Program (SUP) Phase 2 and Phase 3 modifications. Due to an increased number of electrical loads and demands from SUP, the BB1 Electrical Power Supply needs to be adapted for the incorporation of new equipment. This Safety Upgrade Program is being implemented in response to the Fukushima accident.
REPLACEMENT OF 125VDC AND 220VDC CHARGERS
Modification includes replacement of old chargers with three 125V DC chargers and one 220V DC charger, because lifetime of existing chargers has expired, also spare parts of old chargers are no longer available.
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.
RECONSTRUCTION OF THE 400 kV SWITCHYARD OF THE KRŠKO NPP
- reconstruction of two 400 kV transformer bays (SYCA01 and SYCA02),
- reconstruction of 400 kV busbar system
- reconstruction of three 400 kV transmission line bays (Maribor, Tumbri 1 and Tumbri 2)
FIRE DETECTION SYSTEM UPGRADE
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.
NEK ALARM SYSTEM-PROJECT
The dated alarm system in the main control room was replaced by a fully redundant, state-of-the-art digital alarm system.
RCS TEMPERATURE MEASUREMENT OPTIMIZATION
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.
PREPARATION OF INTERFACES FOR NEW RCP MOTOR INSTALLATIONON RCPCPC01-MTR LOCATION
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.
IPB COOLING UNIT SUPPLY AND REPLACEMENT
Modification 1190-GN-L provides the redesign and replacement of original IPB cooling unit (CU). It is needed for unrestricted service and energy transmission at max (880 MVA) power level.
New IPB cooling system design will provide un-interpreted force-air cooling to the bus duct.
NEK RIVER DAM ACCOMODATION DUE TO HYDRO PLANT BREŽICE CONSTRUCTION
NEK River Dam Accomodation due to Hydro Plant Brežice Construction;
RD process control system with new redundant PLC controlled system. The basic function of new system is identical, however some additional new features are included into the system
The main functions of RD control system are:
- Maintaining desired level of the river Sava, by controlling the river gates,
- Measuring of all required parameters related to the operation of the RD DAM
- Monitoring and calculation of all required parameters (ΔT, river T, river H and Q ….),
- alarming the MCR stuff in the case of the malfunction of the system and/or deviation of the control parameters.
UPGRADE OF TECHNICAL SECURITY SYSTEMS DUE TO ELEVATES LEVEL OF RIVER SAVA (on going)
Modification adjusts the impacts of HE Brežice on technical security systems for NEK. Due to the elevated level of the river Sava, which in normal conditions is 3 m higher than the current level upstream of the dam, it is necessary to adapt the technical protection systems to the new conditions. The new system is covering left and right bank of the river Sava.
GENERATOR LOAD BREAK SWITCH SUPPLY AND REPLACEMENT
The scope of the proposed modification 1103-GN-L is the replacement of the existing Generator Load Break Switch (GLBS) manufactured in 1977 by Brown, Boveri & Co (BBC), and its auxiliary equipment, with a new ABB Generator Load Break Switch (GLBS), Type HEC 7C, having its power transfer capability consistent with the generator output rating following generator upgrate
GENERATOR EXCITATION SYSTEM SUPPLY AND REPLACEMENT
The objective of modification is to replace existing Automatic Voltage Regulator (AVR) of WTA (Westinghouse Trinistat Power Amplifier) type. The two existing AVR cabinets will be completely demolished and in their place, three whole new cabinets will be installed. The Functionality of new system shall remain the same as it is on the current or be even better. The new excitation system digital voltage regulator DRN (digitalni regulator napetosti) is based on Končar-INEM digital, fully redundant, regulation and control system for electric machines DIREMK (DIgital Regulation of Electric Machines Končar). Powerful programmable microprocessor unit is the essence of the system. It enables performance of the complicated control and regulation tasks in real time with high accuracy, reliability and speed.
REPLACEMENT OF THE ICCMS CONTROL CABINETS
This modification proposes replacement of NEK existing ICCMS cabinets with new cabinets. Direct indication of the vital ICCMS channels will be also wired to the Emergency Control Room as well as to the MCR MCB.
New ICCMS shall have same functionality as original ICCMS with added feature of transmitting selected duplicate signals to new Emergency Control Board (EMCB) to be erected in Emergency Control Room (ECR).
ICCMS will be qualified for the Design Bases Accident as a part of the Post Accident