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Reactor Vessel Clossure Head (RVCH) replacement and upgrade with Simplified Head Assembly (SHA)

Reactor Vessel Clossure Head (RVCH) replacement and upgrade with Simplified Head Assembly (SHA)

Project is to prevent possible degradation of the material of the Krško NPP reactor head in a manner that is in the nuclear industry known as Pressurized Water Stress Cracking Corosion (PWSCC) phenomenon. Because the original reactor head for the Krško NPP is made using...

RTDBE – RTD Bypass Elimination

RTDBE – RTD Bypass Elimination

Nuclear Power Plant Krško in Slovenia is 2-loops Westinghouse design PWR (pressurized water reactor) plant. Its primary coolant system is provided with temperature measurements based on high quality resistance temperature detectors (RTDs). Temperature information feed into Westinghouse ACS 7300 racks in the control room for...

Main Generator Stator Replacement

 Main Generator Stator Replacement

In association with company Siemens we prepared project documentation for the ''Replacement of Main Generator Stator'' which was replaced during the outage 2010. The main Generator of NPP Krško is 4-pole cylindrical-Rotor synchronous Generator, which was originally manufactured by Westinghouse Electric Corporation in 1977 and...

Main Generator Rotor Replacement

 Main Generator Rotor Replacement

As an upgrade to the modernization of the main Generator NEK has decided to replace the old Rotor. In association with company Siemens, Sipro prepared project documentation for the ''Supply And Replacement of New Generator Rotor'' which was replaced during the outage 2012. The new Generator...

Substations 110/10 kV - Dolginovskaya, Vesnyanka, Petrovschina, Grushevskaya - Minsk - Belarus

Substations 110/10 kV - Dolginovskaya, Vesnyanka, Petrovschina, Grushevskaya - Minsk - Belarus

Company Riko, Ljubljana from Slovenia has constructed two new substations 110/10 kV (Dolginovskaya and Grushevskaya) and reconstructed another two (Petrovschina and Vesnyanka) in Minsk, Belarus on turnkey basis. Sipro Inzeniring has performed for Riko engineering activities for electrical portion of the total scope. Sipro involvement in...

Replacement of Voltage Regulators and Control Equipment on DG1 and DG2

Replacement of Voltage Regulators and Control Equipment on DG1 and DG2

To ensure constant AC power supply NEK has three diesel generators – two were installed with original power plant design, additional third diesel generator was installed during the outage 2012. In the event of loss of off-site power, each of them can provide energy for...

New purification line for RWST and SFP water

 New purification line for RWST and SFP water

A turn-key project, which was ordered by Nuclear power plant Krško, was established. This project included installation of a new process line for filtration and purification of process water from the rad-west storage tank (RWST) and spent fuel pit tank (SFP). Filtration technology is based...

Modification of Essential Service Water System (SW) Intake Structure and Equipment

Modification of the Service Water System belongs within the set of measures which are necessary to eliminate the consequences of the effects due to increase of the level of the Sava River while constructing accumulation pool of hydro power plant Brežice. Increase of the level of...

Replacement and Upgrade of PW – WT Water Treatment System

 Replacement and Upgrade of PW – WT Water Treatment System

Because of increasing demand for clean water, nuclear power plants are searching for more efficient and cost – effective ways to source and select up-to-date water pretreatment technologies. Good example for that kind of improvement is Water pretreatment system modification for Krško Nuclear power plant...

The Process Information System Upgrading (PIS)

 The Process Information System Upgrading (PIS)

In association with the company ABB Oy from Finland we performed the replacement of the obsolete process information system with the recent and more advanced one, which brings essential improvements to control and analysis of the technological process. The PIS consists of three levels. Their main...

CZ Chillers Replacement

 CZ Chillers Replacement

Based on the demands of Nuclear power plant Krško, we established project documentation for replacing chillers in CZ system, which are intended for supplying cooling water for HVAC system (Heating, Ventilation and Air-Conditioning System) in the main control room. The project is the answer to the...

Replacement of Thermal Insulation on Pipe-work in the RB

 Replacement of Thermal Insulation on Pipe-work in the RB

In Sipro we have established project documentation for the replacement of thermal insulation on piping in the reactor building of Nuclear power plant Krško. Companies placing the order were TRANSCO Products Inc. Chicago, USA and Numip Ltd. Ljubljana, who was the performer of the installation...

Lifting Platform Supply - Turn-key

 Lifting Platform Supply - Turn-key

A turn-key project of installing a lifting platform for transporting equipment and material in the turbine building was established. The project was ordered by NPP Krško and it includes project documentation, purchase of equipment, installation, testing and education of NPP Krško personnel for operation and maintenance of...

Conceptual Design for HV substation 220/110/10 kV Dmitrov

 Conceptual Design for HV substation 220/110/10 kV Dmitrov

We developed conceptual design for electrical installation and electrical equipment for high-voltage substation 220/110/10 kV Dmitrov, Russia for our Contracting Partner Riko d.o.o. Ljubljana. The scope of the project is: complete 220 kV air insulated switchyard with two main systems of bus-bars, with six bays (two line...

Pre-investment concept for NPP 2

Pre-investment concept for NPP 2

Considering the vision and strategy of our company we adopted the project called Technical analyses of newer nuclear power plants within the context of pre-investment conceptions for nuclear power plant 2. Direct contracting authority of the chapter in Detail Design Documentation was ELEK d.o.o. Ljubljana...

Replacement of the Reactor Cooling Pump Motor

Replacement of the Reactor Cooling Pump Motor

In order to preserve the plant availability and reliability NEK has decided to buy a new RCP motor. On the basis of Investment Program and Technical Specification SP-S700A the replacement RCP motor has been ordered as fit, form and function replacement motor to existing KRK-125...

Aging Management Review (AMR) of NPP Krško (phases I and II)

 Aging Management Review (AMR) of NPP Krško (phases I and II)

Nuclear power plant Krško performs Aging Management Review (AMR) project, which should ensure a complete overview of system components and structures (SSC) in power plant and their required functions to assure performing of the required safety functions for which they have been designed. The first phase...

Structural Weld OverLay (SWOL) for NPP Krško

 Structural Weld OverLay (SWOL) for NPP Krško

SiPRO prepared the design modification package and the 10CFR50.59 licensing package for the implementation of structural weld over-lays over the Krško NPP pressurizer nozzles. The technical problem is the bi-metallic dissimilar metal welds (DMW), which are used in nuclear coolant systems to connect the stainless...

The design modification package for implementation of EVND

 The design modification package for implementation of EVND

As a subcontractor of Westinghouse, SiPRO provided the design modification package for implementation of Ex-Vessel Neutron Dosimetry (EVND) system for Krško NPP. The EVND is an additional fast neutrons measurement system, which upgrades the reactor vessel material surveillance program. Basic problem considered is the embrittlement of...

Services for solving problems on boiler K5

 Services for solving problems on boiler K5

For paper mill VIPAP Videm Krško we prepared design documentation (design for construction permit and as built documentation) and we lead the process for construction and operating permit as well as carried out professional supervision over residues (ashes, dross and slag) from the combustion in...

RB Recirculation Sump Screen Replacement

 RB Recirculation Sump Screen Replacement

In Sipro we established project documentation for replacement of Emergency Core Cooling Sump screen, which serves for filtering of pump suction water during emergency cooling of containment in NPP Krško. Companies placing the order were CCI AG Winterthur, Switzerland and Numip Ltd. Ljubljana, who was...

Replacement of synchro verifier relays and relocation of LV fuses

Replacement of  synchro verifier relays and relocation of LV fuses

Purpose of modification 709-EE-L was replacement of worn synchronization verification relays. These relays serve purpose during ''Fast Transfer'' procedure, when power supply is switched from regular T1 and T2 transformers to auxiliary transformer T3. T1 and T2 are supplied from plants generator, while T3 gets...

TEŠ 6 – Design Documentation for Construction Permission for Water Pumping Plant, Water Treatment Facility, Bypass Filtration Station and Ammonia Water Plant

TEŠ 6 – Design Documentation for Construction Permission for Water Pumping Plant, Water Treatment Facility, Bypass Filtration Station and Ammonia Water Plant

Sipro Engineering was involved in the design for construction permission for 600 MWe block 6 of Thermal Power Plant Šoštanj (Slovenia). Sipro developed the design of mechanical installations, technology and equipment and the design of electrical installation and equipment, for the following technological parts: Water pumping...

SX Sampling Panel Replacement

 SX Sampling Panel Replacement

In association with the companies SWAN AG from Switzerland and Iskra Sistemi from Slovenia we thoroughly updated the on-line process water analysis equipment in Nuclear power plant Krško. We also integrated modernization into process information system.  Turbine Building SX sampling panel SX101RCK-001 have been replaced due...

Work Platform

 Work Platform

Sipro established project documentation for Nuclear power plant Krško working platforms and access ladders installation in various locations inside and outside of the radiological controlled area, as well as in the reactor building. This involves locations which were not accessible for maintenance, examinations or operation...

Switchgears breaker status information of NEK Process Information System

Sipro prepared design modification package for providing status information of 22 breakers of safety related and non-safety related 6,3 kV switchgears, and status of 31 breakers of safety related and non-safety related 400 V switchgears of Nuclear Power Plant Krško. The modification provided new 150...

Obstruction Lights Replacement

Obstruction Lights Replacement

Our client, Krško NPP has contracted us to do an obstruction lights replacement project at their meteorological measurements tower. This is a 70 m tall antenna like structure that has to be lit at night and in poor weather conditions in order to be visible...