NB/T 20579-2021Reference index for commissioning of nuclear power plant construction project (English PDF)

Foreword

This document was issued on 7 January 2021 by the National Energy Administration of the PRC and takes effect on 1 July 2021.

It is a NB/T standard: recommended rather than compulsory, but it is the text a Chinese reviewer applies when assessing a submission.

It is classified under ICS 01.040.27, Chinese classification F 02.

This document has been drafted in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

This document was proposed by the Energy Industry Nuclear Power Standardization Technical Committee and is under the jurisdiction of He Gongye Biaozhunhua Yanjiusuo (Nuclear Industry Standardization Institute).

Drafting organizations of this document: China Nuclear Power Engineering Co., Ltd., Zhongguanghe Gongcheng Youxian Gongsi, and China Electric Power Planning and Engineering Institute.

Chief drafters of this document: Yuan Xu, Zhong Xiaohua, Liang Zhenyang, Xu Dalei, Zhu Fei, Luan Xianghai, Yang Liu, Gao Xiang, Zhang Jinghui, Kang Rujie, Xu Dongwei, Yu Yang, Qiao Piye, Zhang Li, Gong Boyang, Ji Kai, Li Bo, Wang Jianghong, Shan Yuqing, Ji Weiwei, Chen Jun, Cao Congmin, Luo Ya, Nong Yi'en.

1 Scope

NB/T 20579-2021 sets out reference cost indices for the commissioning of nuclear power plants - the figures an estimator uses to budget the start-up testing of a new unit, from the first system tests through fuel loading and criticality to full-power operation. Commissioning a nuclear unit is a long, labour-intensive programme with its own consumables and instrumentation, and it also produces electricity that is sold before handover, so both its cost and that revenue have to be estimated at the design stage. The reference case is a pair of improved second-generation 1000 MWe pressurised water reactors. The document gives the scope, the normative references and the defined terms, then the structure of commissioning costs and the general rules for applying the indices. It sets out the labour quotas in man-days for each phase of commissioning and for the special tests, the consumable materials with their quantities for a twin-unit plant, the depreciation of the test instruments and equipment used, and the formula for the revenue from electricity sold during start-up, based on the number of days of power generation assumed per unit. The adjustment of the indices for other reactor types, unit sizes and numbers of units is addressed. The annexes list the plant system codes to which the indices are allocated and the detailed quota tables by system and phase. It is used by owners and cost consultants preparing commissioning budgets for nuclear power projects in China.

This document specifies the commissioning engineering indexes used in the budget quotas for nuclear power plant construction projects.

This document is applicable to the commissioning works of new-build and extension projects of 1000 MWe second-generation improved pressurized water reactor nuclear power units; retrofit projects of nuclear power units and nuclear power projects of other reactor types may refer to it.

2 General description

2.1 This document has been compiled on the basis of statistics and analysis of the commissioning cost structure and cost data of nuclear power projects already built in China, and serves as the basis for preparing project estimates and budgets and the commissioning-related investment of nuclear power projects.

2.2 This document has been compiled on the basis of the current technical regulations, codes and standards issued by the competent national energy authorities, mainly including the documents listed in items a) to l).

2.2 a) Standardization Law of the People's Republic of China (implemented in 1989).

2.2 b) Regulations for the Implementation of the Standardization Law of the People's Republic of China (implemented in 1990).

2.2 c) Administrative Measures for National Standards for Engineering Construction (implemented in 1992).

2.2 d) Provisions for the Drafting of Engineering Construction Standards (2008 edition).

2.2 e) Provisions for the Compilation of Other Project Costs of Nuclear Power Plant Construction Projects (2010 edition).

2.2 f) Safety Regulations for the Operation of Nuclear Power Plants (HAF 103/04, 2004 edition).

2.2 g) Implementing Rules No. 1 of the Regulations of the People's Republic of China on the Safety Supervision and Management of Civilian Nuclear Installations - Application for and Issuance of Safety Licences for Nuclear Power Plants (HAF 001/01, 1993 edition).

2.2 h) Reporting System for Nuclear Power Plant Operating Organizations (HAF 001/02/01, 1995 edition).

2.2 i) Safety Regulations for Quality Assurance of Nuclear Power Plants (HAF 003, 1991 edition).

2.2 j) Commissioning Procedures for Nuclear Power Plants (HAD 103/02, 1987 edition).

2.2 k) Quality Assurance during Commissioning and Operation of Nuclear Power Plants (HAD 003/09, 1988 edition).

2.2 l) Organization and Safe Operation Management of Nuclear Power Plant Operating Organizations (HAD 103/06, 2006 edition).

2.3 This document covers two parts: commissioning expenditure and commissioning revenue of nuclear power projects.

2.3 a) 1) Commissioning expenditure includes the expenditure for preparation, performance and related management of commissioning test items.

2.3 a) 2) Commissioning expenditure includes the expenditure for items used in the commissioning process, including electricity purchased from outside for commissioning.

2.3 a) 3) Commissioning expenditure includes the expenditure for the cooperation of the construction contractors with commissioning work during the commissioning period.

2.3 b) The commissioning revenue of a nuclear power project is the revenue from electricity sold during the commissioning period.

2.4 This document has been compiled taking as reference the commissioning programme and commissioning test list of a gigawatt-class, twin-unit, fully digital, second-generation improved pressurized water reactor. Test items are divided into two categories: commissioning tests and special tests.

2.5 Commissioning tests are described in separate chapters for three stages: single-system tests, partial start-up tests and integrated start-up tests. Values are assigned in the form of a man-day quota, and costs are calculated as: commissioning test cost = man-day quota multiplied by man-day comprehensive unit price.

2.5 Note: The definitions of man-day quota and man-day comprehensive unit price are given in 2.10 and 2.11.

2.6 Compared with commissioning tests, special tests are technically more difficult and carry higher risk, and impose higher requirements on the technical ability and qualifications of test personnel and on tools and instruments (see Chapter 6). Costs are calculated as: special test cost = man-day quota multiplied by man-day comprehensive unit price plus amortization of tool and instrument costs.

2.7 Commissioning items are divided into two categories, commissioning consumables and commissioning tools and instruments; the quota costs are listed by item type and reference price. Commissioning consumables are included in the commissioning cost as one-off consumption.

2.7 Among commissioning tools and instruments, fixed assets such as instruments and meters are amortized by the straight-line method over their service life, and non-fixed assets are included in the commissioning cost as one-off consumption (see Chapter 7).

2.7 Note: Commissioning items do not include items supplied together with equipment or items for production preparation.

2.8 The cooperation of construction contractors with commissioning work is charged at a rate, calculated as a set proportion of the installation works cost (excluding the cost of installed materials) as the base.

2.9 a) Cooperation work of construction contractors includes installation, removal and maintenance of temporary commissioning facilities, scaffolding and working platforms.

2.9 b) Cooperation work includes transport of commissioning equipment, tools and instruments, and crane support during the commissioning period.

2.9 c) Cooperation work includes dismantling and restoration of related equipment, piping and insulation, and penetrations, piping openings and wall openings and their plugging.

2.9 d) Cooperation work includes surface cleaning, anti-corrosion treatment and paint touch-up of equipment and piping, and site cleaning work.

2.9 e) Cooperation work includes installation and removal of commissioning instruments and meters.

2.9 f) Cooperation work includes removal, replacement and restoration of strainers and orifice plates.

2.9 g) Cooperation work includes temporary ventilation, water supply, power supply and lighting.

2.9 h) Cooperation work includes adjustment and measurement of supports, hangers and snubbers.

2.9 i) Cooperation work includes the production and installation of labels and signs.

2.9 j) Cooperation work includes temporary facilities for flushing of process systems.

2.9 k) Cooperation work includes other related commissioning support work.

2.10 In this document a man-day is based on an eight-hour working day, and the number of working days per year is 250 days as specified by the state.

2.10 The man-day quota for commissioning tests is the number of man-days required to complete the commissioning work of two units, estimated from the number of system tests: commissioning tests total 253 497 man-days, of which single-system tests 77 496 man-days, partial start-up tests 89 499 man-days and integrated start-up tests 86 502 man-days; special tests total 35 031 man-days.

2.10 The man-day quota includes the total man-days of all personnel participating in commissioning and comprehensively reflects the man-days required for the preparation, performance and related management of the test items.

2.10 a) 1) Commissioning preparation work includes establishing the organization and the management system.

2.10 a) 2) Commissioning preparation work includes mobilization, training and authorization of personnel.

2.10 a) 3) Commissioning preparation work includes becoming familiar with engineering design and equipment documentation, and supporting design and equipment procurement work.

2.10 a) 4) Commissioning preparation work includes following and participating in on-site construction and installation.

2.10 a) 5) Commissioning preparation work includes preparing commissioning documents, schedules and plans.

2.10 a) 6) Commissioning preparation work includes the preparation of commissioning items.

2.10 b) 1) Commissioning performance work includes organization and performance of the test items.

2.10 b) 2) Commissioning performance work includes recording test data and writing commissioning test reports and stage summary reports.

2.10 b) 3) Commissioning performance work includes raising improvement requirements and recommendations for deviations or non-conformances found during commissioning.

2.10 b) 4) Commissioning performance work includes equipment maintenance and upkeep.

2.10 b) 5) Commissioning performance work includes operation training.

2.10 b) 6) Commissioning performance work includes cooperation with nuclear safety inspections of commissioning.

2.10 b) 7) Commissioning performance work includes cooperation with nuclear safety reviews of commissioning.

2.10 c) 1) Commissioning management work includes schedule (progress) control.

2.10 c) 2) Commissioning management work includes interface management.

2.10 c) 3) Commissioning management work includes turnover (handover) management.

2.10 c) 4) Commissioning management work includes change management.

2.10 c) 5) Commissioning management work includes quality management.

2.10 c) 6) Commissioning management work includes HSE management.

2.10 c) 7) Commissioning management work includes risk management.

2.10 c) 8) Commissioning management work includes cost management.

2.10 c) 9) Commissioning management work includes management of commissioning items.

2.10 c) 10) Commissioning management work includes procurement of items and services, and operating experience feedback.

2.10 c) 11) Commissioning management work includes document management.

2.10 c) 12) Commissioning management work includes participation in the provisional acceptance (PAC) and final acceptance (FAC) of the units.

2.11 The man-day comprehensive unit price includes, apportioned to each commissioning person, labour costs, technical training costs, costs of preparing technical and management documents, technical measures costs, overhead and site management costs of the commissioning organization, as well as financial costs and taxes. According to the technical grades and qualifications of personnel required, it is charged under four cost standards: man-day comprehensive unit price for single-system tests, for partial start-up tests, for integrated start-up tests and for special tests.

2.12 a) This document is compiled on the condition that the reference units are gigawatt-class, twin-unit, fully digital, second-generation improved pressurized water reactor nuclear power units.

2.12 b) This document is compiled on the condition of the standard commissioning schedule (see 2.14).

2.12 c) Equipment, materials and chemicals are complete and undamaged, meet quality standards and design requirements, and are accompanied by product certificates and detailed test records.

2.12 d) Equipment installation complies with the design drawings and the technical codes for construction acceptance, and the quality inspection and assessment sign-off has been completed.

2.12 e) The site, roads, water/gas/steam/power supply, lighting, communication, air conditioning and fire protection facilities at the commissioning site meet the prerequisites for starting commissioning tests.

2.12 f) Technical preparations such as the commissioning command organization, operator examinations, operating rules and systems, system diagrams, tools and instruments, equipment and system labelling, and isolation facilities meet the requirements of trial operation.

2.12 g) This document is compiled on the condition of normal weather conditions.

2.12 h) This document is compiled on the condition of compliance with current laws, regulations and standards.

2.13 a) This document does not include commissioning schedule extensions, additional or repeated commissioning work caused by parties other than the commissioning party.

2.13 b) This document does not include support investment by design organizations and equipment suppliers.

2.13 c) This document does not include investment in technical modifications beyond the design standard.

2.13 d) This document does not include preventive and corrective maintenance services during commissioning, minor repair services requested by the operator before commercial operation of the units, or technical services and support after completion of unit performance tests.

2.13 e) This document does not include item consumption, maintenance, routine repair and similar expenditure for system trial production after system commissioning is completed and handed over to the production department, or expenditure such as early introduction of contractors for unit production needs.

2.14 a) Standard commissioning schedule: the period of a single unit from first concrete (FCD) to commercial operation is 60 months, and the interval between the start of construction of the two units is 10 months.

2.14 b) Standard commissioning schedule: commissioning preparation starts 8 months after FCD, and commissioning of the first process system starts 23 months after FCD.

2.14 c) Standard commissioning schedule: the integrated start-up test period runs from the start of the primary circuit hydrostatic test to the end of the unit performance tests, and lasts 13 months.

2.14 d) Standard commissioning schedule: the commissioning work period runs from the start of commissioning preparation to final acceptance (FAC).

2.15 Test numbers in this document are identified by a mixed alphanumeric code of eight characters in four groups, XX-N-YYY-MM, as shown in Table 1 (Composition of test numbers).

Table 1, Note 1: The first group consists of two letters, identifying a commissioning test as SY and a special test as TP.

Table 1, Note 2: The second group is one digit or letter distinguishing the unit to which the test item belongs: 0 for plant common facilities, 9 for facilities shared by two units, and X for items applicable to both units simultaneously.

Table 1, Note 3: The third group consists of three letters and is the system code (or special test code); see Annex A System code list and Annex B Special test code list.

Table 1, Note 4: The fourth group consists of two digits and represents the test sequence number.

Table 1, Note 5: The groups are separated from each other by a hyphen (-).

2.16 For matters not fully covered in this general description, the chapters, clauses and annexes shall prevail.

3 Single-system tests

3.1 The single-system test stage mainly includes turnover of systems to commissioning, commissioning isolation, and functional verification of equipment within systems (subsystems).

3.1 a) Main work for system (subsystem) turnover and isolation: participating in all activities of the installation-to-commissioning turnover process, tracking installation status, and reviewing and signing turnover documents.

3.1 b) Main work for system (subsystem) turnover and isolation: establishing and managing the test area of the system (subsystem).

3.2 Functional verification of equipment within a system (subsystem) means starting, running, stopping and general functional checking of individual equipment to verify its design, manufacture and installation quality.

3.2 a) Checking the conformity of equipment installation with mechanical installation drawings and electrical wiring diagrams.

3.2 b) Flushing or blowing systems with fluids such as demineralized water, oil or compressed air, monitoring the cleanliness and chemical properties of the fluid during cleaning to meet requirements, and removing foreign matter from important systems.

3.2 c) Inspection and calibration of electrical and compressed-air actuators and their control systems.

3.2 d) Checking the relevant parameters and working status of components such as valves and motors.

3.2 e) Testing the continuity, integrity and insulation of electrical control and power circuits.

3.2 f) Inspection and calibration of system instrumentation and control channels.

3.2 g) Testing power supply and distribution, instrumentation and control circuits, and the emergency power supplies and compressed-air circuits used in control, to verify their stability and reliability.

3.2 h) Testing pumps on the minimum-flow line to verify the correct working status of the motor-driven pump unit itself and of associated systems (including cooling, ventilation and lubrication).

4 Partial start-up tests

The main work of the partial start-up test stage is local or preliminary joint start-up testing of several physically connected or functionally interlocked systems, for example the tests listed in items a) to l).

4 a) Pump station water intake test (including circulating water system, circulating water filtration system, essential service water system and plant sewage system).

4 b) Nuclear circuit joint flushing test (including reactor coolant system, safety injection system, chemical and volume control system and residual heat removal system).

4 c) Cold functional test of the pressure vessel with the head open.

4 d) Pressurizer relief tank and safety valve tests.

4 e) Nuclear island ventilation and fire protection system interlock test.

4 f) Cold start-up test of the radioactive waste (three wastes) systems.

4 g) Dry and wet preliminary tests of the fuel handling machine.

4 h) Secondary circuit joint flushing test (including high-pressure feedwater heater system, low-pressure feedwater heater system, deaerator system and condensate extraction system).

4 i) Conventional island oil system joint adjustment test (including turbine control oil system, turbine-generator lubricating oil system, generator seal oil system and conventional island closed cooling water system).

4 j) Conventional island cold vacuum-drawing test (including lubricating oil system and turning gear operation).

4 k) Generator tightness test.

4 l) Logic circuit actuation test of reactor protection and engineered safety features.

5 Integrated start-up tests

The main work of the integrated start-up test stage is the unit functional tests from the start of the primary circuit hydrostatic test to the end of the unit performance tests, and the start-up tests of the main auxiliary systems (including water, gas, steam, oil, air and electrical systems).

5 a) Nuclear island cold functional tests.

5 b) Nuclear island hot functional tests.

5 c) First fuel loading.

5 d) Pre-criticality tests.

5 e) Tests for criticality and power ascension to the 50 %FP stage.

5 f) Tests for the stage of reactor power ascension step by step from 50 %FP to 100 %FP full power.

5 g) First turning gear test of the conventional island.

5 h) Hot vacuum-drawing of the conventional island secondary circuit.

5 i) First run-up (roll-off) test of the turbine-generator.

5 j) First grid synchronization test of the turbine-generator.

5 k) Load test of the turbine-generator.

6 Special tests

Special tests verify that, with the nuclear power unit under specified accident or transient conditions, the related systems and equipment actuate and the unit responds correctly, meeting design criteria, and that the unit is finally brought to a safe state or the release of radioactive products to the environment is prevented. Such tests directly verify the safety performance of the nuclear power unit and are subject to strict operating criteria and nuclear safety acceptance criteria.

Special tests are characterized by long test preparation periods, high personnel qualification requirements, wide scope of test design, high inherent test risk, complex test organization and performance, and strict supervision by the National Nuclear Safety Administration. Because of their special, complex and specialized nature, they impose special requirements on equipment and higher qualification requirements on participating personnel. Dedicated facilities and special equipment are more complex than in system tests; the main participants are senior project personnel such as experienced operators, shift engineers and shift supervisors, whose labour cost is higher than that of ordinary system test personnel. In terms of staffing, facilities and resources mobilized, special tests require considerably more than system tests.

7 Commissioning items

7.1 Commissioning consumables are materials used up in one-off consumption during the test stage, including oil, grease, water, electricity, gas, steam and chemicals used for commissioning, as well as general materials; their reference quantities and reference prices are given in Table 2.

Table 2, item 1 (commissioning oils and greases): diesel oil, unit tonne, twin-unit consumption 1 550; reference unit price and amount not given.

Table 2, item 1 (commissioning oils and greases): lubricating oil, unit barrel, twin-unit consumption 1 000; reference unit price and amount not given.

Table 2, item 1 (commissioning oils and greases): other oils (yellow oil, engine oil, gasoline, kerosene, hydraulic oil, etc.), quantity not given.

Table 2, item 1 (commissioning oils and greases): greases (high-temperature lubricating grease, calcium-based grease, lithium-based grease, anti-seize compound, radiation-resistant lubricating grease, silicone grease, conductive paste, etc.), quantity not given.

Table 2, item 2 (commissioning water): unit tonne, twin-unit consumption 1 100 000; reference unit price and amount not given.

Table 2, item 3 (commissioning electricity): purchased electricity, unit 10 000 kWh, twin-unit consumption 30 000.

Table 2, item 4 (commissioning gases): hydrogen, unit cubic metre, twin-unit consumption 52 000.

Table 2, item 4 (commissioning gases): nitrogen (liquid nitrogen), unit cubic metre, twin-unit consumption 1 600.

Table 2, item 4 (commissioning gases): other gases (argon, carbon dioxide, argon-methane, helium, hydrogen chloride, argon shielding gas, freon, standard gases, etc.), quantity not given.

Table 2, item 5 (commissioning steam): no quantity or price given; amount column marked NA (steam cost is already converted into commissioning electricity and water, see Note 2).

Table 2, item 6 (commissioning chemicals): hydrazine hydrate, unit tonne, twin-unit consumption 10.

Table 2, item 6 (commissioning chemicals): boric acid, unit tonne, twin-unit consumption 180.

Table 2, item 6 (commissioning chemicals): sodium hydroxide, unit tonne, twin-unit consumption 160.

Table 2, item 6 (commissioning chemicals): ammonia water, unit tonne, twin-unit consumption 10.

Table 2, item 6 (commissioning chemicals): nuclear-grade resin (anion, cation, mixed), unit litre, twin-unit consumption 72 650.

Table 2, item 6 (commissioning chemicals): lithium hydroxide, unit kg, twin-unit consumption 50.

Table 2, item 6 (commissioning chemicals): sulfuric acid, unit tonne, twin-unit consumption 50.

Table 2, item 6 (commissioning chemicals): hydrochloric acid, unit tonne, twin-unit consumption 118.

Table 2, item 6 (commissioning chemicals): nitric acid, unit tonne, twin-unit consumption 3.

Table 2, item 6 (commissioning chemicals): composite aluminium, unit tonne, twin-unit consumption 120; other salts, quantity not given.

Table 2, item 7 (commissioning general materials): the collective term for wearing parts and consumables widely used on site and difficult to recover; quantity not given.

Table 2, Note 1: The above prices are estimated on the basis of 2014 market prices; for subsequent units the effect of price fluctuations shall be considered.

Table 2, Note 2: The cost of commissioning steam has been converted into commissioning electricity and commissioning water.

Table 2, Note 3: Seawater desalination is not considered in the technical scheme; if seawater desalination is adopted, the electricity for desalination and seawater resource charges shall be added.

7.2 Commissioning tools and instruments are the instruments, meters and tools used during the commissioning test stage. Fixed assets such as instruments and meters are amortized by the straight-line method: annual depreciation rate = (1 - net residual value rate) / (service life x 100 %), with a net residual value rate of 5 % and a service life of 5 years. Non-fixed assets are included in the commissioning cost as one-off consumption; the tools and instruments are listed in Table 3.

7.2 Note: Special tools are not included; they are covered in the special test part.

Table 3, item 1 (commissioning instruments and meters): metrological verification and usage fee; estimated cost (10 000 yuan) not given.

Table 3, item 2 (general tools): fixed assets and non-fixed assets; estimated cost (10 000 yuan) not given.

8 Electricity sales during commissioning

Electricity sales during commissioning are the on-grid electricity generated from the start of grid connection and joint adjustment of the unit until it enters commercial operation.

Starting from the zero-power physics tests, the unit raises power on power plateaus of 15 %, 30 %, 50 %, 75 %, 87 % and 100 % (or 97 %) and completes the tests of each stage.

Under the standard schedule, the number of load trial operation days is converted to full power: the load trial operation period of a single unit during commissioning is 36.05 days, and that of twin units is twice that of a single unit.

Calculation formula: electricity sales revenue of a single unit during commissioning = generator capacity x rated capacity factor x number of load trial operation days x trial operation on-grid electricity price.

Annex A System code list (informative)

Annex A item 1 - system code ABP: low-pressure feedwater heater system.

Annex A item 2 - system code ACO: AC building power supply system.

Annex A item 3 - system code ADG: feedwater deaerator system.

Annex A item 4 - system code ADS: low-voltage AC system.

Annex A item 5 - system code AGM: motor-driven main feedwater pump lubrication system.

Annex A item 6 - system code AHP: high-pressure feedwater heater system.

Annex A item 7 - system code APA: motor-driven main feedwater pump system.

Annex A item 8 - system code APD: start-up feedwater system.

Annex A item 9 - system code APG: steam generator blowdown system.

Annex A item 10 - system code ARE: main feedwater flow control system.

Annex A item 11 - system code ASG: auxiliary feedwater system.

Annex A item 12 - system code ATE: condensate polishing system.

Annex A item 13 - system code ATO: feedwater virtual system.

Annex A item 14 - system code CAR: turbine low-pressure cylinder spray water system.

Annex A item 15 - system code CDF: fluid chemistry monitoring.

Annex A item 16 - system code CET: turbine gland sealing system.

Annex A item 17 - system code CEX: condensate extraction system.

Annex A item 18 - system code CFI: circulating water filtration system.

Annex A item 19 - system code CGR: circulating water pump lubrication system.

Annex A item 20 - system code CPA: cathodic protection system.

Annex A item 21 - system code CRF: circulating water system.

Annex A item 22 - system code CTE: circulating water treatment system.

Annex A item 23 - system code CVI: condenser vacuum system.

Annex A item 24 - system code DEG: nuclear island chilled water system.

Annex A item 25 - system code DEL: electrical building chilled water system.

Annex A item 26 - system code DSI: site alarm and surveillance system.

Annex A item 27 - system code DTK: 500 kV switchyard communication system.

Annex A item 28 - system code DTL: nuclear island closed-circuit television system.

Annex A item 29 - system code DTQ: solid waste building closed-circuit television system.

Annex A item 30 - system code DTV: site communication system.

Annex A item 31 - system code DVA: radioactive maintenance workshop ventilation system.

Annex A item 32 - system code DVC: main control room air conditioning system.

Annex A item 33 - system code DVD: diesel generator building ventilation system.

Annex A item 34 - system code DVE: cable floor ventilation system.

Annex A item 35 - system code DVF: electrical building smoke exhaust system.

Annex A item 36 - system code DVG: auxiliary feedwater pump room ventilation system.

Annex A item 37 - system code DVH: charging pump room emergency ventilation system.

Annex A item 38 - system code DVI: component cooling water system room ventilation system.

Annex A item 39 - system code DVK: fuel building ventilation system.

Annex A item 40 - system code DVL: electrical building main ventilation system.

Annex A item 41 - system code DVM: turbine building ventilation system.

Annex A item 42 - system code DVN: nuclear auxiliary building ventilation system.

Annex A item 43 - system code DVP: circulating water pump station ventilation system.

Annex A item 44 - system code DVQ: waste auxiliary building ventilation system.

Annex A item 45 - system code DVR: essential service water pump house ventilation system.

Annex A item 46 - system code DVS: ventilation system of the motor-driven pump rooms of the containment spray system and low-pressure safety injection system.

Annex A item 47 - system code DVT: demineralized water workshop ventilation system (YA building).

Annex A item 48 - system code DVV: auxiliary boiler and air compressor building ventilation system (VA building).

Annex A item 49 - system code DVW: peripheral equipment room ventilation system.

Annex A item 50 - system code DVY: No. 5 diesel generator building ventilation system.

Annex A item 51 - system code DWA: AC building hot maintenance workshop and warehouse ventilation system.

Annex A item 52 - system code DWB: SA canteen ventilation system.

Annex A item 53 - system code DWC: simulator training centre ventilation system (EA).

Annex A item 54 - system code DWD: security building ventilation system.

Annex A item 55 - system code DWE: main switchyard ventilation system (TB/TC building).

Annex A item 56 - system code DWG: reactor outage changing room ventilation system.

Annex A item 57 - system code DWI: seawater desalination building HVAC system.

Annex A item 58 - system code DWJ: LY building HVAC system.

Annex A item 59 - system code DWL: hot laundry ventilation system.

Annex A item 60 - system code DWM: emergency centre ventilation system (EM building).

Annex A item 61 - system code DWN: site laboratory ventilation system (AL building).

Annex A item 62 - system code DWQ: chemical drain tank room ventilation system.

Annex A item 63 - system code DWR: LY building HVAC system.

Annex A item 64 - system code DWS: essential service water pump station ventilation system (PX building).

Annex A item 65 - system code DWT: ground drain tank room ventilation system.

Annex A item 66 - system code DWU: fire training centre ventilation system (EB building).

Annex A item 67 - system code DWV: oil storage ventilation system (FC building).

Annex A item 68 - system code DWW: laboratory and office ventilation system (XL building).

Annex A item 69 - system code DWX: air compressor room ventilation system (ZC building).

Annex A item 70 - system code DWZ: hydrogen production station ventilation system (ZB building).

Annex A item 71 - system code EAS: containment spray system.

Annex A item 72 - system code EBA: containment air exchange ventilation system.

Annex A item 73 - system code ETY: containment atmosphere monitoring system.

Annex A item 74 - system code EUF: containment filtered exhaust system.

Annex A item 75 - system code EUH: containment hydrogen elimination system.

Annex A item 76 - system code EVC: reactor pit ventilation system.

Annex A item 77 - system code EVF: containment purification system.

Annex A item 78 - system code EVR: containment continuous ventilation system.

Annex A item 79 - system code GCA: conventional island preservation system.

Annex A item 80 - system code GCT: turbine bypass system.

Annex A item 81 - system code GEV: main transformer and high-voltage auxiliary transformer.

Annex A item 82 - system code GEW: 500 kV extra-high-voltage system.

Annex A item 83 - system code GEX: generator, excitation and voltage regulation system.

Annex A item 84 - system code GFR: turbine governing oil system.

Annex A item 85 - system code GGR: turbine-generator lubrication, jacking oil and turning gear system.

Annex A item 86 - system code GHE: generator seal oil system.

Annex A item 87 - system code GME: turbine monitoring system.

Annex A item 88 - system code GPA: generator-transformer unit protection system.

Annex A item 89 - system code GPV: turbine, steam and drain system.

Annex A item 90 - system code GRE: turbine governing system.

Annex A item 91 - system code GRH: generator hydrogen extraction and cooling system.

Annex A item 92 - system code GRV: generator hydrogen and cooling system.

Annex A item 93 - system code GSE: turbine protection system.

Annex A item 94 - system code GSS: moisture separator reheater system.

Annex A item 95 - system code GST: generator stator cooling system.

Annex A item 96 - system code GTP: generator grid synchronization system.

Annex A item 97 - system code GTH: turbine lubricating oil treatment system.

Annex A item 98 - system code JDT: fire detection system.

Annex A item 99 - system code JPD: fire water distribution system.

Annex A item 100 - system code JPH: conventional island pneumatic pressure water supply system.

Annex A item 101 - system code JPI: nuclear island fire protection system.

Annex A item 102 - system code JPL: electrical building fire protection system.

Annex A item 103 - system code JPM: conventional island fixed gas fire extinguishing system.

Annex A item 104 - system code JPP: fire water production system.

Annex A item 105 - system code JPT: transformer water spray fire extinguishing system.

Annex A item 106 - system code JPU: site fire water distribution system.

Annex A item 107 - system code JPV: diesel generator building fire protection system.

Annex A item 108 - system code KCP: plant process control cabinet system, non-safety-class part.

Annex A item 109 - system code KCS: plant process control cabinet system, safety-class part.

Annex A item 110 - system code KDO: test data acquisition system.

Annex A item 111 - system code KIC: plant computer and control system.

Annex A item 112 - system code KIR: loose parts and vibration monitoring system.

Annex A item 113 - system code KIS: seismic instrumentation system.

Annex A item 114 - system code KKK: access control system.

Annex A item 115 - system code KKO: metering and fault recording system.

Annex A item 116 - system code KLP: 500 kV line protection system.

Annex A item 117 - system code KME: test instrumentation system.

Annex A item 118 - system code KOO: overall operation system.

Annex A item 119 - system code KPR: emergency shutdown panel system.

Annex A item 120 - system code KRS: site radiation and meteorological monitoring system.

Annex A item 121 - system code KRT: plant radiation monitoring system.

Annex A item 122 - system code KSC: main control room system.

Annex A item 123 - system code KSN: nuclear auxiliary building radioactive waste treatment control system.

Annex A item 124 - system code KSU: security management system.

Annex A item 125 - system code KZC: controlled area access monitoring system.

Annex A item 126 - system code LAA: 220 V DC power supply and distribution system.

Annex A item 127 - system code LAB: turbine-generator lubricating oil pump uninterruptible power supply system.

Annex A item 128 - system code LB1: 110 V DC power supply and distribution system, train A.