1. Project Management and Engineering Services Unit in SE RAW providing consulting services for fulfilment of different tasks for the decommissioning of Units 1 to 4 and  site selection, design, safety evaluation, construction and commissioning of a National Repository for radioactive wastes (As subcontractor to Consortium with Empresarios Agrupados и Nuvia).
2. Design and implementation of a system for heatup and cooldown of the metal in the water chambers and the tube plates of the chamber type high-pressure heat exchangers at Kozloduy NPP.
3. Modernization of monitoring and control system of Auxiliary Building 3 at Kozloduy NPP (Subcontractor to Westinghouse).
4. Design for mounting of a Г-shaped crane 5,6YW00E09 in the Central Hall in the area of 5,6YD10(40) at Kozloduy NPP.
5. Preparation of an expert review report for the technical documentation of unit 6 (Kozloduy NPP) for the project “Development of a modernized fuel cycle and substantiation of the safe operation of units 5 and 6 KNPP with the modified fuel at power 3120 MWe”.
6. Survey of operational regimes of the HVAC system in RAW Treatment Facility at Kozloduy NPP site.
7. Design of steam and condensate pipelines of the system for blowing of the biofuel burning barrel for Mondi Stambolijski JSC.
8. Design of a pipeline for the paper machine PM2 in Mondi Stambolijski JSC.
9. Design of a new pipeline for draining of the high-pressure pre-heaters in no-load regime of the TG at low power up to 100 MW at Kozloduy NPP.
10. Design of a new line from the SG drainage system to the technological condenser for Kozloduy NPP units 5 and 6
11. Fulfilment of hydrodynamic test for migration of an external object in the cooling system of 10GQ generator at Kozloduy NPP
12. Computational verification of underground pipeline №5 of service water system QF at Kozloduy NPP
13. Design of a trestle bridge for deallocation of diesel devices in horizontal direction in Eurometal Bulgaria Ltd.
14. Field supervision and technical assistance during construction-and-assembling operations of the investment project „Design and implementation of the system for heating and cooling of the metal in the water chambers and tube plates of the chamber type high-pressure heaters at Kozloduy NPP“
15. Fulfilment of repair and wiring works on the main and auxiliary equipment and systems of nuclear units during 2016 planned maintenance at Kozloduy NPP
16. Supply of maintainable check-valves for the emergency feedwater system at Kozloduy NPP
17. Reconstruction of the hydrazine hydrate storage facility at Kozloduy NPP
18. Strength analysis of the tube bundles of high-pressure heaters at Kozloduy NPP
19. Design of a new expansion vessel of the turbine generators TG-9 and TG-10 at Kozloduy NPP
20. Analysis of the possibilities for a temporary storage of radioactive waste, generated as a result of decommissioning activities of units 1 to 4 of Kozloduy NPP, at the territory of the extension of Dry Storage Spent Fuel Facility (DSSFF Stage Ia)
21. Design of a new pipeline for an extra drainage of the outlet pipes of the turbine system during 9TG start up at Kozloduy NPP
22. Design of steam lines for the paper machine PM2 in Mondi Stambolijski JSC
23. Update and seismic retrofit of the metal construction 5, 6 UQ00E01 at Kozloduy NPP
24. Retracing of pipelines for condensate supply to the condensate pumps at Kozloduy NPP
25. Review of selected reports, related to the substantiation of the safe operation of reactor pressure vessel and building structures, part of Stage 2 of the Project for life-extension of Kosloduy NPP Unit 5
26. Additional analysis for assessment of the bahaviour of TVSA and TVSA-12 type fuel assemblies in mixed fuel loadings during anticipated transients at Kozloduy NPP
27. Design of technological pipelines of the system for entrapment and transportation of turpentine in the cellulose production unit of Mondi Stambolijski JSC
28. Reconstruction of the steam line for live steam drainage in TPP AES Galabovo
29. Strength analysis of membrane type flanges of heat exchangers 5TQ10,20,30W01 at Kozloduy NPP
30. Design of a new line in the drainage system of the steam generators at Kozloduy NPP

1. Project Management and Engineering Services Unit in SE RAW for consulting services for fulfilment of different tasks for the decommissioning of Units 1 to 4 and  site selection, design, safety evaluation, construction and commissioning of a National Repository for radioactive wastes (As subcontractor to Consortium with Empresarios Agrupados и Nuvia). 
2. Design and implementation of a system for heatup and cooldown of the metal in the water chambers and the tube plates of the high-pressure heat exchangers with chamber type. 
3. Design and Modernization of the systems for gas venting of units 5 and 6
4. Safety Analyzis Report (SAR) and Safety Evaluation Report (SER) for the Spent Fuel Storage (SFS) with a storage technology “under water”. 
5. Elaboration of a Detailed Design for “Enhancement of the cocks gas system in Duisburg Huckingen” (Germany) as subcontractor to Enemona as a main supplier.
6. Modernization of the system for radiation monitoring in the SFS (spent fuel  storage), part “Design” – subcontractor to Energo Service. 
7. Evaluation of the capabilities of the spray pond to retain and maintain stable material and energy balance as a thermal facility.
8. Specific analysis of the barriers to radioactive releases during operation of Kozloduy NPP at 3120 MW, Topic-2 „Analysis of beyond design basis accident sequences, contract 248000026/24.09.2014 г.
9. Modernization of the system for monitoring and control of Auxiliary Building 3 (Subcontractor to Westinghouse).
10. Modernization of the control of the monitors for radiation monitoring type RTM860TS and supply of monitors of radioactive contamination of a body with gamma and beta detectors.
11. Design of a new supporting system for the pipelines within the trestles of Auxiliary building 3 to units 5 and 6.
12. Detailed design for mounting of new pipelines for CNCG gasses and condensate in trestle 1  and  Conceptual design of a pipeline inside trestle 1 to the new Chemical treatment facility for Mondi JSC.
13. Detailed design for new heat exchangers  TS10W01, 02, 03 and cut-off and drainage armature on the lines of VB system, insuring cut off and washing of TS10W01 – 03.
14. Verification analyses of the behaviour of the compensator of the collector of the 6-th steam extraction of TG-9 (turbogenerator–9) in connection with its maintenance and repair.  

1. Peer review of selected design solutions in the Technical Design of NPP “Belene” (Generation III+ WWER NPP)
2. Analysis of the radiological consequences in case of DBA with LB LOCA Dn850 within the containment and Reactivity and thermal hydraulic analysis in case of a postulated initiating event – control rod ejection.
3. Analysis for proofing the possibility for operation of steam dump to atmosphere valves BRU-A-5,6TX50, 60, 70, 80S05 with water or two-phase (steam-water) mixture )sub-contractor to Atomtoploproekt  for the part – models for strength calculations and strength verification.
4. Uncertainty analysis for predicted neutronic and thermal-hydraulic parameters of selected accidents at WWER-1000 (contract with IAEA)
5. Investigation of the possible pathways and technical means, design and installation  of alternative FW to SGs in case of SBO for units 5 and 6 at KNPP. 

1. Project Management and Engineering Services Unit in Kozloduy NPP for fulfilment of different tasks for the decommissioning of Units 1 and 2. Important self-performance projects elaborated by ENPRO in the framework of the Project are:

• Development of Updated Decommissioning Strategy for Units 1 to 4.
• Development of Decommissioning Plan for Units 1 and 2.
• Elaboration of a Technical Design and Supply of necessary equipment for Organisation of Size Reduction Areas in Turbine Hall.
• Elaboration of a Technical Design and Supply of necessary equipment and materials for installation of new water pipeline between service water "B" group - units 3, 4 with the service water system of units 1, 2.
• Design of a pipeline connection DN400 between the service water group "Б" system - Units 3&4 - and the service water system - Units 1&2.
• Elaboration of Plate heat exchangers for redundancy of the heat exchangers 1, 2HWB-А.
• Development of a Decommissioning Safety Analysis Report.
• Assessment of the rest lifetime resource of systems, components, civil constructions in use during decommissioning.
• Elaboration of a safety analysis report for the operation of KNPP Units 1&2 as RAW management facility trough a Special Division "Decommissioning - Kozloduy"

2. Elaboration of a project for complete radiation surveillance of Kozloduy NPP Units 1&2 – subcontractor of EWN.
3. Independent review and safety assessment of Kozloduy Unit 5 in case of beyond design failure of the control rod drives.
4. Draft of the third national report of Republic of Bulgaria on the fulfilment of the obligations, originating from the Joint Convention on the Safety of Spent Fuel Management and on the Safety of Radioactive Waste Management.  
5. Rest life time evaluation for systems and equipment for spent fuel storage and for the technological systems in the spent fuel storage of Kozloduy NPP.
6. Development of a program for investigation, analysis and evaluation of the mechanical characteristics of pipelines group “B” for unit 6 at KNPP after 100,000 hours of operation (subcontractor to ATP).  
7. Realization of an additional possibility for emergency filling of the spent fuel pool (БОК- В,Г) in case of break of the pipelines, connected to the spent fuel pool, that ensure cooling and maintain water level, needed for a safe storage of the spent fuel.
8. Increase of the seismic stability of the pipelines, ensuring cooldown and maintaining water level in the spent fuel pool (БОК- В,Г)
9. Design of thermal insulation of equipment and pipelines in Unit 1 of Maritza Iztok 2 thermal power plant.
10. Elaboration of a detailed design for construction of a temporary scheme with supporting hanging system, needed to perform steam letdown of units 3 and 4 and provision of a monitoring during the construction.
11. Detailed design of the modernization of the destructor of the incinerator plant for burning of hazardous wastes from hospitals.

1. Participation in the Modernization Program of Kozloduy Units 5&6, subcontractor of FRAMATOME ANP – Upgraded Safety Analysis Report (USAR).
2. Project Management and Engineering Services Unit in Kozloduy NPP for fulfilment of different tasks for the decommissioning of Units 1 and 2 (subcontractor of BNFL/EDF).
3. Technical Project of Installations for treatment and storage of radioactive wastes in the National Storage Novi Han-2, EuropeAid/116740/D/SV/BG (with Empresarios Agrupados, Spain).
4. Study of power reduction modes in case of trip of two out of two turbine-driven feed water pumps at Kozloduy Unit 5&6 – contract with GRS, Germany
5. Elaboration of a supplementary package to USAR of Kozloduy Units 3&4 and substantiation of LOCA 2хDN 500 as a Design Basis Accident.
6. Analysis and substantiation of the necessity for evaluation of the rest life time of civil structures, systems, installation and components in the Spent Fuel Storage equipment.
7. Improvement of the operational reliability of main steam pipeline “Superheated steam” in the section Outlet collector of the Superheated steam header II – T-joint “Main steam pipeline balance – KA-9, KA-12, KA-10” - Maritza Iztok 2 Thermal Power Plant.
8. Detailed Design for installation and connection of a new igniting, pressure reduction and cooling facility for Boilers 1&2 of District Heating Plant Sofia-Iztok.
9. Technical solution and Detailed Design of reinforcement of the pipelines for steam blow-down at Units 1 and 2 of Maritza Iztok 2 thermal power plant
10. Strength calculations of the connection to ТQ40S08 and ТQ40S09 of Kozloduy Units 5&6
11. Design of a bypass pipeline of system UM in the heat distribution plant of Kozloduy NPP
12. Detailed design of a new support and suspension system of oil pipielines form SA51 to SC51D41,42 and from SA52 to SC52D41,42 – Kozloduy NPP Units 5&6
13. Replacement of control valves 5RN81S01, 5RN82S01, 5RN91S01, 5RN92S01, 5RN11S02, 5RN12S02, 5RN21S06, 5RN22S06 of system RN -  Kozloduy NPP Units 5&6
14. Detailed design of a stack with height + 38.6 m of the co-generation plant 32 MW – district heating plant, Pleven
15. Elaboration of technical documentation for permit application for modifications of the construction of the reinforced concrete container for transportation and storage of treated radioactive waste from Kozloduy NPP

1. Participation in the Modernization Program of Kozloduy Units 5&6, subcontractor of the European Consortium Kozloduy companies and Westinghouse more than 25 measures, including: 

• Increase the reliability of the Steam Generator Safety Valves (planning and design of the valves replacement); 
•  Install an Automatic device for Cold Overpressure Protection (studies, analyses, design); 
• Install Hydrogen Detection and Hydrogen Monitoring Systems; 
• Filtered System for Pressure Suppression in the containment; 
• Diagnostic systems (e.g. Leak Detection, Loose Part Monitoring, Fatigue Monitoring - KUS, FLUS, FAMOS); 
• Implementation of a system for monitoring of critical parameters during accident and post-accident situations (SPDS, PAMS); 
• Internal Hazards Analysis (e.g. internal flooding, high energy pipes breaks); 
• Safety, Seismic and Quality classification of the systems and equipment of Units 5&6; 
• Upgraded Safety Analysis Report (USAR) - bring the analyses in SAR in compliance with international practice, etc.

1. Implementation of System for control of decommissioning KNPP Units 1&2 subcontractor of EWN.
2. Assessment of some safety aspects of WWER-440/230 and WWER-1000/320 contract with GRS, Germany.
3. Participation in the development of Severe Accident Management Guidelines for units 3&4 and for units 5&6 at Kozloduy NPP (elaboration of all SA analyses needed for the project).
4. Preliminary Safety Assessment of the reconstruction of KNPP Units 1&2 (together with Risk Engineering).
5. Organize a Project Management and Engineering Services Unit in Kozloduy NPP for fulfilment of different tasks for the decommissioning of Units 1 and 2 (subcontractor of BNFL/EDF).
6. Analysis of dependent failures in case of feed water lines ruptures in the containment of KNPP Units 3 and 4.
7. Thermal-hydraulic analysis of LOCA DN 200 mm and LOCA 2?DN 500 mm with consideration for the interlocks for refilling of the High pressure safety injection tank from the containment sump and for the modified interlocks for opening of the delivery valves of the Low pressure safety injection pumps of KNPP Units 3 and 4.
8. Filtered Pressure Suppression System for KNPP Units 3 and 4 subcontractor of FANP Germany.
9. Install Hydrogen Detection and Hydrogen Monitoring Systems for KNPP Units 3 and 4 subcontractor of FANP Germany.
10. Analysis of the isolation of systems, connected to the primary circuit of KNPP Units 3 and 4.
11. Detailed Design of the physical separation of the safety systems equipment in the boron compartments of KNPP Units 3 and 4.

1. Substantiation and Detailed Design of a system for Gas-evacuation from the reactor and Measurement of the reactor level under normal operational conditions, during DBA and BDBA, in case of formation of a steam-gas volume under the reactor cover Kozloduy NPP Units 3&4.
2. Justification of the Critical Safety Functions of and their degree of degradation for KNPP 5&6.
3. Organize a Project Management and Engineering Services Unit in Kozloduy NPP for fulfilment of different tasks for the decommissioning of Units 1 and 2 (subcontractor of BNFL/EDF).
4. Detailed Design for installation of additional check valves on the feed water pipelines to the SGs inside the containment KNPP 3&4.
5. Substantiation of conservative calculations for LOCA DN 500 for the purposes of the Safety Analysis of KNPP 3&4 (in co-operation with ENCONET).
6. Detailed Design of a FLUS system for KNPP 3&4.
7. Expert evaluation of the radiological consequences of LOCA at KNPP 3&4 after the implementation of the Jet-Vortex Condenser.
8. Study and Detailed Design for the protection of the high pressure safety injection tank from overpressurization after the implementation of the scheme for its automatic re-filling by the Low pressure safety injection pumps under different operational modes of KNPP 3&4.
9. Thermal-hydraulic analysis of a Small Break LOCA at KNPP unit 3 and elaboration of a design for upgrading of the interlocks of the ventilation systems of the hermetic compartments of KNPP 3&4.

1. Analysis of the feasibility for installation of a leak monitoring system for the primary coolant pipelines qualified for LBB – p. 1.320.1 of PRG’99.
2. Thermal hydraulic analysis of transients for the validation of the full-scope simulator of Unit 6, KNPP.
3. Detailed Design of FAMOS – KNPP Unit 4.
4. Detailed Design for the decommissioning of KNPP 1&2 – subcontractor to Belgatom and EWN.
5. Studies for WWER-440/230 – a contract with GRS, Germany.
6. Detailed Design for a new system for SG level control and replacement of the feedwater control valves, KNPP 3&4.
7. Participation in the Rest Life Time evaluation of KNPP 1?4 of - subcontractor to the companies from the CONSART consortium (Siemens and Atomstroyexport).
8. Participation in the reconstruction of the Localization System of KNPP 3&4 with installation of a Jet-vortex Condenser - subcontractor to Atomstroyexport.
9. Independent evaluation of the safety of KNPP 3&4 – subcontractor to ENCONET.
10. Elaboration of the upgraded SAR of KNPP 3&4 (in co-operation with RISK Engineering Ltd.).
11. Detailed Design of FAMOS, KNPP Unit 3

1. Modernization of the full-scope simulator at the training centre of VUJE, Trnava: elaboration of the plant model for RELAP5 R/T code for real time simulation.
2. Review of the Programme for Safety upgrading of KNPP 1?4.
3. Thermal-hydraulic analyses of the behaviour of the primary and secondary circuit and of the hermetic compartments of KNPP Units 1?4 in case of break of a blow-down line of SG, DN 80. Evaluation of the emergency operating procedures.
4. Analysis of high energy pipelines breaks in Rooms 002/3,4 with regard to the installation of an additional emergency feed water system at KNPP 3&4.
5. Preparation of input data for the Basic Engineering Phase of the Modernization Programme for KNPP 5&6.
6. Expert evaluation of the Detailed Design “Replacement of the SG Safety Valves at KNPP Unit 2”.
7. Expert evaluation of the RNC report “LB LOCA Analyses and Reliability Study of the Primary Coolant Pipelines of Kozloduy NPP Units 1-4”.
8. Participation in the elaboration of the Report of the Republic of Bulgaria on the Fulfilment of the Convention on Nuclear Safety.
9. Analyses for the validation of EOPs of KNPP Units 1-4.
10. Participation in the Basic Engineering Phase of the Modernization Programme for KNPP 5&6 – subcontractor to the companies of the European Consortium Kozloduy and Westinghouse.
11. Detailed Design: Replacement of the main steam lines from the boilers 1÷4 to the turbine-generators 1÷4 at the Sofia–Iztok District Heating Plant.
12. Detailed Design: Replacement of the main steam lines of Boiler No. 4; analysis and adjustment of the support/suspension system of the main steam lines of Boilers 1÷6 of Maritza Iztok Thermal power plant.
13. Expert evaluation of SAR, Revision 3, Part 1, of the additional emergency feed water system of KNPP 3&4.
14. Multifunctional Simulator for WWER 230 at KNPP – organization of pilot training courses and programmes – subcontractor for the Tasis/Phare Nuclear Safety Project No. PH 2.01/94- U2.04/94-R2.15/94.
15. Contract for an exclusive representative in Bulgaria of the German company svt BRANDSCHUTZ for the “svt PYRO-SAFE” products.

1. IAEA Projects :

• Safety assessment of WWER-440/213 (reference plant Bohunice V2, Slovakia)
• Elaboration of a MELCOR code-based severe accident simulator (reference plant Bohunice V2, Slovakia)
• Safety assessment of WWER-1000 (reference plant Zaprozhie Unit 5)
• CRP J4.20.04 “Assessment of the Interfaces between Neutronic, Thermal-Hydraulic, Structural and Radiological Aspects in Accident Analysis”
• CRP J7.20.05 “Evaluation of Uncertainties in Best Estimate Accident Analysis”

2. Preparation of lectures and IAEA training courses:

• Basics of NPP with WWER-1000/320
• Analysis of severe accidents using the MELCOR code (Peking, China)
• RELAP5/3, SCDAP/RELAP and MELCOR application for analysis of design and beyond design basis accidents (Mexico)

3. Participation of international research projects

• OECD/NEA VVER-1000 Coolant Transient Benchmark (main steam line break in WWER-1000 plant)
• BMU (Germany) project “Scientific-Technical Co-operation with Middle and East European Countries”