DOCUMENTATION FOR QUALIFICATION SYSTEM

DOCUMENTATION FOR QUALIFICATION SYSTEM MATERIAL GROUP: PRESSURE EQUIPMENT MAINTENANCE, REPAIR INTERNAL CODE OF MATERIAL GROUP: MM10300 New code according the registration on myhome: MMGV03 CPV CODE: 45259000-7, 45262680,50530000 Version 4 of 20 May 2013 Mlynské Nivy 47 821 09 Bratislava 2 Incorporated in the Companies Register of the District Court Bratislava I, Section Sa, Insert No.: 2904/B; Company ID: 35 829 052, VAT ID: SK2020261353 Contact: nakup.backoffice@enel.com 1 / 11, Headquarters: Mlynské nivy 47, 821 09 Bratislava 2, Slovak Republic, Company ID: 35 829 052, Companies Register of the

1. Introduction 1.1. The document specifies basic qualification requirements that candidates shall fulfil to become qualified SE suppliers for contracts for Pressure equipment maintenance, repair. The qualification (inclusion into the qualification system) will be successful in case that the candidate fulfilled all requirements defined in the General qualification terms (GQT), as well as requirements defined in this documentation (Documentation). GQT form a part of the Documentation in a form of separate document. In case of differences in the conditions defined in GQT and Documentation, the conditions of the Documentation shall prevail. 1.2. The qualification system for pressure equipment repair and maintenance is kept for 2 categories: Category 1 Nuclear power plants Category 2 Conventional power plants 1.3. Each of these categories are further divided by subject of matter of the activities in subcategories: - Pressure vessels and heat - Piping systems 1.4. The candidate will be assigned to the respective category and subcategory depending on the subject of the performance - By assessment of the submitted authorization and certificates - By assessment of the submitted references 2. Description of Subject from Material Group 2.1. Subjects of contracts for execution of which suppliers will qualify: Maintenance and metalwork (services) at pressure vessels and heat in nuclear and heat power plants: o Primary circuit steam generators, hydro accumulators, pressurizers, spray system coolers, MCP oil coolers, residual heat removal system pump oil coolers, fuel storage pit coolers, pump intermediate circuit coolers, storage tanks, blow-down coolers, steam expanders, ion, heat, evaporators o Secondary circuit high-pressure heaters, low-pressure heaters, deaerators, steam expanders, motor-driven pump oil coolers, separators re-heaters, TG oil coolers, intermediate circuit coolers, technological condensers, compressed air accumulators, heat for DGS, ion, water heaters, heat, storage tanks, feed-water tanks 2 / 11, Headquarters: Mlynské nivy 47, 821 09 Bratislava 2, Slovak Republic, Company ID: 35 829 052, Companies Register of the

The contract subject execution will cover the following: a) Preparation for pressure vessel and low-pressure and high-pressure heat exchanger inspections opening vessel hatches, disassembly of heat exchanger lids cleaning jointing material, flange and lid contact surfaces manufacture of seals for closing vessels and heat sealing vessels and heat b) Repair of pressure vessels and heat cleaning pressure vessel internal surfaces, including their accessories repair of contact surfaces by mechanical machining repair of welds and base material by grinding and welding c) Removal of defects of welds in pressure vessels and heat using the following welding technologies used in vertical (PC) and horizontal (PF) positions: carbon steel of grades 11416. 1 and 12 021.1 shielding metal arc welding (111) shielded argon arc welding using a TIG method (141) stainless austenitic steels of grade 17 248.4 shielded argon arc welding using a TIG method (141) Pressure vessels and heat have been defined by Regulation No. 508/2009 Coll. as technical equipment pressure group A letters b as well as in group B letters a and b. Maintenance and welding performances and services (production of new welds at replacement or installation of new pipe parts and supports and remedy of defects of existing welds) at the following pipe systems: o thin-walled pipe systems with diameters DN 10 to DN 1800 from steels of grade 1.1 according to CR ISO 15608 o steam generator feed-water pipe system with diameters DN 25 to DN 250 with the maximum operating pressure 7 MPa from steels of grade 1.1 according to CR ISO 15608 o live steam pipe system with diameters DN 10 to DN 500 with the maximum pressure 4.6 MPa from steels of grade 1.1 according to CR ISO 15608 o thin-walled auxiliary pipe systems of the primary circuit with diameters DN 10 to DN 600 from steels of grade 8 according to CR ISO 15608 o thick-walled pipe systems of the primary circuit with diameters DN 15 to 500 with the maximum operating pressure 12.5 MPa from steels of grade 8 according to CR ISO 15608 o components with heterogeneous welds from steels of grades 1.1+8, 4+8, 5+8, and 6+8 according to CR ISO 15608 o contact surfaces and technological equipment surfaces from steels of grades 1.1, 4, 5, 6, 7, and 8 according to CR ISO 15608 o feed-water pipe system with diameters above DN 100 with the maximum operating pressure 25 MPa from steels of grade 1.1 according to CR ISO 15608 o live steam pipe system with diameters DN 10 to DN 273 with the maximum pressure 13.6 MPa from steels of grade 6 according to CR ISO 15608 o heated steam pipe system with diameters DN 10 to DN 377 with the maximum pressure 3.2 MPa from steels of grade 6 according to CR ISO 15608 3 / 11, Headquarters: Mlynské nivy 47, 821 09 Bratislava 2, Slovak Republic, Company ID: 35 829 052, Companies Register of the

At execution of works, one of the following technologies should be used: shielding metal arc welding (111 according to STN EN 24063) inert-gas-shielded tungsten arc welding (141 according to STN EN 24063) shielded metal arc welding (131, 135, 136, and 137 according to STN EN 24063) for steam ducts (141 according to STN EN 24063), filling and cover sheets, shielding metal arc welding (111 according to STN EN 24063) Piping systems have been defined by Regulation No. 508/2009 Coll. as technical equipment pressure group A letters e and group B letters e, 1,2. 2.2. The supplier will perform works by one of the following methods: 2.2.1. In work teams of the client managed by a client s technical supervisor based on SE technological procedures and technical documentation. 2.2.2. Independently completely based on design documentation submitted to SE and own technological procedures of working and welding procedures. 2.3. In the event that contract is performed in the controlled area of the nuclear power plant, the contract with the qualified successful tenderer will be concluded provided that the following certificates for all qualified workers are submitted: 2.4.1 Certificate of health, mental competence and impeccability in accordance with Act No. 541/2004 Coll. on peaceful use of nuclear energy (Atomic Act) 26 Sect. 5,. 2.4.2 Document of impeccability a valid abstract from the criminal record no older than three months for the workers, who will perform work in the controlled area 2.4.3 Document of health competence a certificate issued by a doctor authorised to issue such confirmations 2.4.4 Document of mental competence a confirmation of successfully passed psychological tests, issued by the psychological workplace authorised to issue such confirmations. 2.4.5 Certificate of competence in accordance with Act No. 355/2007 Coll. as amended on the protection, support and development of public health pursuant to 15 Sect.1 Letter c) d) e) in compliance with 45 of the respective act, required.. In the event that the people, who will perform the subject of the qualification system, have valid entry permits issued by SE, for which they proved necessary trainings for work in the NPP issued by VÚJE, impeccability, health and mental competence, it will not be necessary to submit such documents again. 4 / 11, Headquarters: Mlynské nivy 47, 821 09 Bratislava 2, Slovak Republic, Company ID: 35 829 052, Companies Register of the

3. Qualification Requirements 3.1. Basic requirements the candidate must fulfil in order to fulfil the qualification conditions are as follows:. personal status conditions; economic and financial standing conditions; technical ability and professional suitability conditions, quality assurance and environmental management conditions Personal status conditions, economic and financial standing conditions, as well as the way of submitting and proving of qualification requirements by the candidates for this qualification system is defined in the GQT. 3.2. Technical ability and professional suitability, quality assurance, environmental management requirements 3.2.1. The candidate fulfils technical ability and professional suitability, quality assurance, environmental management requirements for the contract fulfilment if: - it has provable experience with implementation of similar projects; - it has manufacturing facilities, technology, qualified personnel and organisational structure for fulfilment of similar subjects at disposal; - it has a qualify management system related to the given subject documented and functional, and the quality management system has been validly verified by a successful audit made by SE pursuant to Annex 1 to Regulation of NRA SR No. 56/2006 Coll. The required verification is required only for category Nuclear Power plants; - it has an occupational health and safety (OH&S) system documented and functional; - it has an environmental management system documented and functional according to ISO 14001:2004 or EMAS. 3.2.2. The candidate shall prove its technical and professional competence by submitting the following documents in myhome, depending on assigning to the qualification categories and subcategories pursuant to clause 1.2. and 1.3.: a. A list of contracts (supplies), at least one, of the same or similar character, performed for last 5 years in the following equipment listed in The Annex 1 for required category and subcategory: The candidate shall submit information on performed contracts (references) on a form, template of which will be available after registration to the relevant qualified material group in myhome. Execution of each contract shall be confirmed by the customer, if it is not possible, the fact shall be confirmed by the candidate. SE, a. s. shall be entitled to verify the facts stated in the List of Contracts at the customer. b. A supplier s certificate to perform activities pursuant to Act no. 124/2006 Z.z. according to 15. 1 for the equipment listed in Annex 1 to Decree č.508/2099 Coll Part 1 The distribution of technical equipment of pressure under the name listed in Annex 1 of the required categories and subcategories 5 / 11, Headquarters: Mlynské nivy 47, 821 09 Bratislava 2, Slovak Republic, Company ID: 35 829 052, Companies Register of the

c. A list of workers with their technical qualifications for performed activities that are a subject of this qualification. The List shall contain the workers' names, surnames, qualifications and their legal relations to the supplier. To verify the workers qualifications, copies of certificates must be attached in myhome. i. Certificate pursuant to Regulation No. 508/2009 Coll. according to Article 18(1) the equipment listed in Annex 1 to Decree č.508/2099 Coll Part 1: Distribution of technical equipment of pressure under the name listed in Annex 1 of the required categories and subcategories. ii. Certificate pursuant to Regulation No. 508/2009 Coll. according to 17 paragraph 2 for binding loads listed in Annex 1 of the required categories and subcategories iii. Certificate to the inspector within the meaning of Regulation no. 508/2009 Coll. 16 set out in Annex 1 of the required categories and subcategories iv. Certificate for welding documented by a test certificate according to STN TN EN 287-1 + A2:2006 for a respective welding method, group of materials, weld dimensions, a welding material type, and weld joint position and type (TIG 141, MIG 135, 111) listed in Annex 1 of the required categories and subcategories. v. Diploma of a European welding technologist listed in Annex 1 of the required categories and subcategories. vi. Certificate pursuant to NV SR 396/2006 Z.z. the minimum safety requirements for construction sites to coordinate safety, listed in Annex 1 of the required categories and subcategories d. A list of machinery and hardware the candidate has at disposal for execution of the contract subject. The List must contain the equipment name, its description and relation to the candidate (ownership, operative leasing, rental). SE is entitled to verify facts mentioned in the List by an audit made at the candidate or its supplier. For fulfilment of the qualification conditions, the supplier has to have the following equipment at disposal: i. general utility tools, tools for work with austenitic steel (a list of torque wrenches and other tools, including their metrological inspection certificates should be submitted); ii. iii. bevelling equipment to DN 500, welding apparatus for welding by the TIG method; a transport vehicle for transporting workers and material; e. A qualify certificate related to the corresponding subject of qualification issued by an independent institution according to requirements of EN ISO 9001:2008 or other document (e.g. Quality Manual) proving that the candidate has a qualify management system implemented according to EN ISO 9001:2008 requirements. f. A statement of external audit performed by SE for the category nuclear power plants. If the candidate was not audited or the audit certificate validity expired, the candidate will submit a solemn statement that the candidate and its supplier agree with its execution. 6 / 11, Headquarters: Mlynské nivy 47, 821 09 Bratislava 2, Slovak Republic, Company ID: 35 829 052, Companies Register of the

The audit purpose is to verify information obtained about the candidate, and to check a quality management system s functionality by qualified SE personnel. The supplier the quality management system of which was audited by SE will be included in a List of Audited SE Suppliers at a respective level during the audit validity term. g. An OH&S management system certificate according to OHSAS 18001 standards, or the following documents based on which SE will assess the OH&S management functionality: i. Company safety policy by which the company proves an obligation to prevent accidents and to establish a safe work environment; ii. Working procedure for performed activity (Safety Plan) containing a safe working procedure for provision of service/work, and proving a candidate's ability to follow the safety principals and to prevent occurrence of accidents in a workplace; iii. iv. A list of workers responsible for the OH&S management with specification of their positions in the company's organisational chart, data and certificates related to their technical qualification in OH&S; A list of registered industrial accidents with a sick leave exceeding 30 days and fatal accidents with specification of adopted measures to prevent them for the last 3 years. h. An environmental management system certificate issued by an independent authority according to EN ISO 14001:2004 requirements, or other document (e.g. by a registration in EMAS) proving that the supplier has an environmental management 7 / 11, Headquarters: Mlynské nivy 47, 821 09 Bratislava 2, Slovak Republic, Company ID: 35 829 052, Companies Register of the

PRESSURE EQUIPMENT MAINTENANCE, REPAIR Category / subcategory Requirements a) provable experiences with similar performances b) Technical qualification on performing the activity c) Qualified personnel c) Qualified personnel Required document The list of contracts on following equipments: pressure systems and pipe systems Certificate pursuant to Article 15 (2) of Act of the Slovak National Council No. 124/2006 Coll., the equipment listed in Annex 1 to Decree č.508/2099 Coll Part 1: Distribution of technical equipment of pressure under the title: A list of workers 1 authorized in accordance with Decree no. 508/2009 Z.z. according to 18 paragraph 1, the equipment listed in Annex 1 to Decree č.508/2009 Coll Part 1: Distribution of technical equipment of pressure under the title: A list of workers authorized in accordance with Decree no. 508/2009 Z.z. according to 17 paragraph 2 for slinging loads A list of workers* authorized to inspection under Decree no. 508/2009 Z.z. 16 Nuclear power plants Pressure vessels and heat Conventional power plants Pressure vessels and heat equipment group A; b 1.2 Group B; a,b equipment group A; b 1.2 Group B; a,b equipment group A; e Group B; e 1.2 equipment group A; e Group B; e 1.2 equipment group A; b 1.2 Group B; a,b equipment group A; b 1.2 Group B; a,b equipment group A; e Group B; e 1.2 equipment group A; e Group B; e 1.2 c) Qualified personnel A list of workers * with Diploma of a European welding technologist 1 The List shall contain the workers' names, surnames, qualifications and their legal relations to the supplier. To verify the workers qualifications, authentic copies of certificates must be attached. / 811, sídlo: Mlynské nivy 47, 821 09 Bratislava 2, Slovenská republika, IČO: 35 829 052, Obchodný register Okresného súdu Bratislava I, Oddiel: Sa, Vložka číslo:2904/b

PRESSURE EQUIPMENT MAINTENANCE, REPAIR Category / subcategory Requirements c) Qualified personnel Required document A list of workers* with test certificate for welding according to STN TN EN 287-1 + A2:2006 for a respective welding method, group of materials, weld dimensions, a welding material type, and weld joint position and type (TIG 141, MIG 135, 111). Nuclear power plants Pressure vessels and heat Conventional power plants Pressure vessels and heat c) Qualified personnel A list of workers* authorized in accordance with NV SR 396/2006 Z.z. the minimum safety requirements for construction sites to coordinate safety / 911, sídlo: Mlynské nivy 47, 821 09 Bratislava 2, Slovenská republika, IČO: 35 829 052, Obchodný register Okresného súdu Bratislava I, Oddiel: Sa, Vložka číslo:2904/b

PRESSURE EQUIPMENT MAINTENANCE, REPAIR Category / subcategory Requirements d) machinery: - general utility tools, tools for work with austenitic steel; torque wrenches and other tools, including their metrological inspection certificates bevelling equipment to DN 500, welding apparatus for welding by the TIG method a transport vehicle for transporting Nuclear power plants Pressure vessels and heat Conventional power plants Pressure vessels and heat Required document A list of machinery and hardware 1 e) qualify management system Audit of Supplier 3 A qualify certificate related to the corresponding subject of qualification issued by an independent institution according to requirements of EN ISO 9001:2008 or other document (e.g. Quality Manual) proving that the candidate has a qualify management system A statement of external audit performed by SE If the candidate was not audited, the candidate solemn statement that the candidate and its supplier agree with its execution No No 1 The List must contain the equipment name, its description and relation to the candidate (ownership, operative leasing, rental). 3 10 / 11, sídlo: Mlynské nivy 47, 821 09 Bratislava 2, Slovenská republika, IČO: 35 829 052, Obchodný register Okresného súdu Bratislava I, Oddiel: Sa, Vložka číslo:2904/b

PRESSURE EQUIPMENT MAINTENANCE, REPAIR Category / subcategory Requirements OH&S management system according to OHSAS 18001 standards f) An environmental management system certificate according to ISO 14001:2004, or according podľa EMAS Required document An OH&S management system certificate according to OHSAS 18001 standards or the following documents: 1. Company safety policy 2. A list of workers responsible for the OH&S management with specification of their positions in the company's organisational chart, data and certificates related to their technical qualification in OH&S; 3. A list of registered industrial accidents with a sick leave exceeding 30 days and fatal accidents with specification of adopted measures to prevent them for the last 3 years 4. safe working procedures An environmental management system certificate issued by an independent authority according to EN ISO 14001:2004 requirements, or other document (e.g. by a registration in EMAS) proving that the supplier has an environmental management system implemented. Nuclear power plants Pressure vessels and heat Conventional power plants Pressure vessels and heat 11 /, sídlo: Mlynské nivy 47, 821 09 Bratislava 2, Slovenská republika, IČO: 35 829 052, Obchodný register Okresného súdu Bratislava I, Oddiel: Sa, Vložka číslo:2904/b