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1、Safety Standards of the Nuclear Safety Standards Commission (KTA) KTA 3702 (06/2000) Emergency Power Generating Facilities with Diesel-Generator Units in Nuclear Power Plants (Notstromerzeugungsanlagen mit Dieselaggregaten in Kernkraftwerken) This safety standard was previously issued in two parts,
2、06/80 and 06/91 If there is any doubt regarding the information contained in this translation, the German wording shall apply. Editor: KTA-Geschaeftsstelle c/o Bundesamt fuer Strahlenschutz (BfS) Willy-Brandt-Str. 5 ? 38226 Salzgitter ? Germany Telephone +49-5341/885-(0) 901 ? Telefax +49-5341/885-9
3、05 KTA SAFETY STANDARD June 2000 Emergency Power Generating Facilities with Diesel-Generator Units in Nuclear Power Plants KTA 3702 Previous versions of this safety standard:KTA 3702.1 06/80(BAnz No. 185a of October 3, 1980) KTA 3702.206/91(BAnz No. 7a of January 11, 1992) Contents Fundamentals1 1Sc
4、ope1 2Definitions1 3Design1 3.1General Requirements1 3.2Power Balance and Static Tolerances1 3.3Power Load Steps and Dynamic Tolerances2 3.4Quiet-run Tolerances3 3.5Power Rating and Number of the Diesel- generator Units in each Train3 3.6Suitability3 3.7Diesel Engine Requirements4 3.8Requirements fo
5、r the Generator5 3.9Requirements for Auxiliary Systems5 3.10 Arrangement and Installation7 3.11 Instrumentation and Control Systems7 3.12 Testability8 4Documents to be Submitted for the Suitability Tests, Type Tests and Production Tests9 4.1General Requirements9 4.2Documents on the Design of the Eme
6、rgency Power Generating Facilities9 4.3Documents on the Diesel Engine10 4.4Documents on the Generator10 4.5Documents on the Auxiliary Systems10 4.6 Documents on the Instrumentation and Control Equipment10 4.7Documents on the Type Tests and Production Tests11 4.8Documents on Tests and Inspections Dur
7、ing On- site Assembly, Commissioning and Inservice Inspection11 4.9Documents on Tests During Repairs11 5Suitability Tests, Type Tests and Production Tests11 5.1Type Test of the Diesel Engine11 5.2Production Test and Acceptance Test of the Diesel Engine13 5.3Type Test of the Generator13 5.4Production
8、 Test of the Generator14 5.5Suitability Test for Components of the Auxiliary Systems14 5.6Production Tests of the Components of the Auxiliary Systems14 5.7Suitability Test for Components of the Instrumentation and Control Equipment14 5.8Production Tests of the Components of the Instrumentation and C
9、ontrol Equipment14 6Tests and Inspections During On-site Assembly 18 7Commissioning Tests18 7.1Tests and Inspections during Pre-nuclear Operation18 7.2Tests During Initial Nuclear Startup Operation19 8Inservice Inspections19 8.1General Requirements19 8.2 Function Test Run19 8.3Test Run at Overload P
10、ower Capacity19 8.4Testing the Instrumentation and Control Equipment19 8.5Examination of the Operating Media19 9Operation, Servicing and Repair20 9.1General Requirements20 9.2Operation20 9.3Servicing and Repair20 10Tests Subsequent to Servicing or Repair 20 11Testers 21 12Test Certification and Docu
11、mentation21 Appendix A Monitoring and Protective Shutdown of an Emergency Power Generating Facility with a Standby Diesel Generator Unit and a Rated Continuous Power Larger than 800 kW22 Appendix B Design Example for the Equipment Protection of a Diesel Engine24 Appendix C Design Example for the Equ
12、ipment Protection of a Generator25 Appendix D Type Testing of a Diesel Engine26 Appendix E Regulations Referred to in this Safety Standard30 PLEASE NOTE: Only the original German version of this safety standard represents the joint resolution of the 50-member Nuclear Safety Standards Commission (Ker
13、ntechnischer Ausschuss, KTA). The German version was made public in Bun- desanzeiger BAnz No. 159a of August 24, 2000. Copies may be ordered through the Carl Heymanns Verlag KG, Luxem- burger Str. 449, 50939 Koeln, Germany (Telefax +49-221-94373603). All questions regarding this English translation
14、should please be directed to: KTA-Geschaeftsstelle c/o BfS, Willy-Brandt-Str. 5, 38226 Salzgitter, Germany Comments by the editor: Taking into account the meaning and usage of auxiliary verbs in the German language, in this translation the fol- lowing agreements are effective: shallindicates a manda
15、tory requirement, shall basicallyis used in the case of mandatory requirements to which specific exceptions (and only those!) are permitted. It is a requirement of the KTA that these exceptions - other than those in the case of shall normally - are specified in the text of the safety standard, shall
16、 normallyindicates a requirement to which exceptions are allowed. However, exceptions used shall be substantiated during the licensing procedure, shall normallyindicates a recommendation or an example of good practice, mayindicates an acceptable or permissible method within the scope of this safety
17、standard. KTA 3702 Page 1 Fundamentals (1)The safety standards of the Nuclear Safety Standards Commission (KTA) have the task of specifying those safety related requirements which shall be met with regard to pre- cautions to be taken in accordance with the state of science and technology against the
18、 damage arising from the con- struction and operation of the facility (Sec. 7 para. 2 sub- para. 3 Atomic Energy Act), in order to attain the protection goals specified in the Atomic Energy Act and Radiological Protection Ordinance (StrlSchV) and which are further de- tailed in “Safety Criteria for
19、Nuclear Power Plants” and in “Guidelines for the Assessment of the Design of PWR Nu- clear Power Plants against Incidents pursuant to Sec. 28 para. 3 of the Radiological Protection Ordinance (StrlSchV) Incident Guidelines”. (2)Based on Criterion 7.1 “Emergency Power Supply” of the Safety Criteria, t
20、his safety standard specifies the requirements for emergency power generating facilities with diesel-gen- erator units. (3)This safety standard was set up under the assumption that the conventional regulations and standards (e.g. German Accident Prevention Regulations, DIN standards and VDE regulati
21、ons) are applied, provided, no other requirements are superposed due to the specifics of the nuclear power plant. (4)General requirements applying to the electrical power supply in nuclear power plants are specified in safety stan- dard KTA 3701. (5)Requirements for emergency power generating facili
22、ties with batteries and rectifiers in nuclear power plants are speci- fied in safety standard KTA 3703. (6)Requirements for emergency power generating facilities with rotary converters and static inverters in nuclear power plants are specified in safety standard KTA 3704. (7)Requirements for switchg
23、ear facilities, transformers and distribution networks for the electrical power supply of the safety system in nuclear power plants are specified in safety standard KTA 3705. (8)Requirements for the fire protection of mechanical and electrical components are specified in safety standard KTA 2101.3.
24、(9)Requirements for the reactor protection system and monitoring system of the safety system are specified in safety standard KTA 3501. (10) General requirements for the quality assurance in nu- clear power plants are specified in safety standard KTA 1401. 1Scope This safety standard applies to emer
25、gency power generating facilities with diesel-generator units (referred to in this safety standard text as emergency power generating facility) in stationary nuclear power plants. N o t e : The boundaries of an emergency power generating facility are shown in Figure 1-1. 2Definitions (1)Standby dies
26、el-generator unit A standby diesel-generator unit is a power generating unit driven by a diesel engine which, upon demand, will take over the power supply to a power load after a voltage interruption. (2)Continuous operating time of diesel engine The continuous operating time of the diesel engine is
27、 the permissible uninterrupted running time for a specified power load cycle over a given time until a scheduled maintenance takes place with the diesel engine at standstill. (3)Rated continuous power of diesel engine The rated continuous power of the diesel engine is the highest power the diesel en
28、gine, when used for an emergency power unit, can continuously supply at nominal speed and specified ambient conditions. (4)Individual diesel-generator unit An individual diesel-generator unit is a power generating unit consisting of a diesel engine and a generator. (5)Operating fuel tank An operatin
29、g fuel tank is the tank allocated to the individual diesel engine and installed between diesel engine and fuel storage tank. (6)Fuel storage tank A fuel storage tank is a tank designed for the storage of fuel on the power plant site. 3Design 3.1General Requirements (1)Design and installation of all
30、parts of the emergency power generating facility shall normally be such that proper maintenance and short repair times are possible. Unambigu- ous instructions shall be provided for operation, servicing and repair. The instructions of the manufacturers shall be taken into consideration. (2)The emerg
31、ency power generating facilities for nuclear power plants shall normally employ standby diesel-generator units. (3)It shall be demonstrated that the components of the emergency power generating facilities are quality assured. 3.2Power Balance and Static Tolerances 3.2.1General Requirements The emerg
32、ency power requirement shall be determined for each train taking into account the design basis accidents (incidents) to be considered and the corresponding accident sequences. Hereby, the power requirements of all power loads that can be connected to the one train in case of the individual design ba
33、sis accident considered shall be deter- mined. 3.2.2Determination of the Active Power (1)In order to determine the diesel engine power rating, the active power shall be assessed in detail for each train. This detailed assessment shall take into account: a) motoric power loads, b) non-motoric power l
34、oads (e.g., rectifiers, heating systems, lighting systems), c) non-uniform distribution of the power load to the individual trains, d) switchable power loads and buses, e) electrical transmission losses, generator losses (degree of efficiency). KTA 3702 Page 2 Figure 1-1:Boundaries of the emergency
35、power generating facility (2)In the case of motoric power loads, the power balance shall include the power requirement of each drive or drive group on the shaft divided by their individual degree of effi- ciency. (3)In the case of intermittently operated drives or drive groups (short-time or interru
36、pted operation), the power bal- ance shall include the rated electrical power multiplied by simultaneity factors. If an actuation can occur at the same point in time, a simultaneity factor of 1 is required. 3.2.3Determination of the Apparent Power In order to specify the generator rating, the balanc
37、e of appar- ent power shall be determined for each train. This requires dividing the active power of the power loads or power load groups determined as specified under Section 3.2.2 by their individual power factors. 3.2.4Safety Margin of the Power Balance A safety margin shall be added to the maxim
38、um power deter- mined from the power balances. At the start of the construc- tion of the emergency power generation facility building the safety margin shall be equal to at least 10 %. 3.2.5Static Tolerances In the static operating range of up to 100 % rated continuous power, the tolerances for spee
39、d and voltage characteristics specified in Table 3-1 shall not be exceeded. 3.3Power Load Steps and Dynamic Tolerances 3.3.1Power Load Steps and Power Load Acceptance Times Under consideration of the accident analysis, the tolerances of the power-load specific design data, the viable power load acce
40、ptance time and the power load acceptance behavior of the diesel engines used, the size, sequence and time inter- vals of the power load steps of each train shall be specified such that a) the process-technologically required sequence and maxi- mum permissible power interruption for the safety relat
41、ed power loads are adhered to, Air conditioning External cooling system Emergency power switch gear Power supply for auxiliary drives Power supply for instrumen tation and control system Priority control of reactor protection system Emergency Power Generating Facility Diesel-generator UnitAuxiliary
42、Systems Fuel and lubricating oil supply system Compressed air supply system Gas-exhaust system Air intake system Instrumentation and control system Diesel engine A : main startup valve K : heat exchangers for water, charge air, oil G : generator KTA 3702 Page 3 b) the permissible dynamic tolerances
43、as specified under Section 3.3.2 are not exceeded under consideration of the transients when the power loads are connected or discon- nected and c) the connection of power loads can be enabled by a simply structured program code. The program code shall be suited to trigger the emergency power supply
44、 at any point in time during the accident sequence. 3.3.2Dynamic Tolerances In the case of power load changes up to the overload power capacity specified under Section 3.7.2, the dynamic toler- ances of the speed and voltage characteristics specified in Table 3-2 shall not be exceeded. 3.4Quiet-run
45、Tolerances (1)The vibrations transmitted from the diesel-generator unit to the structure and from the diesel engine to the generator shall be limited within the rotational speed adjustment range as follows: a) The vibrational power loads transmitted from the diesel- generator unit to the civil struc
46、ture shall not exceed 3 % of the static power load. b) The vibrations transmitted from the diesel engine to the generator shall not exceed the vibrational fatigue resis- tance of the generator. When designing the diesel- generator unit, an agreement shall be reached between manufacturers of the dies
47、el engine and the generator re- garding the generator design or the additional measures regarding vibration isolation. (2)A torsional vibration analysis shall be carried out for the torsional vibration system of diesel engine, coupling and gen- erator to demonstrate that the vibration range does not
48、 in- clude any critical values. This requires taking spark failures of one cylinder into account. 3.5Power Rating and Number of the Diesel-generator Units in each Train (1)The statically required power rating shall be specified on the basis of the power balance determined for each train (Sections 3.
49、2.2 and 3.2.3) including the safety margin (Sec- tion 3.2.4). The power rating of the diesel-generator unit shall be chosen such that it meets the dynamic tolerances as specified under Section 3.3.2 taking the units mass moment of inertia into account. The design of the diesel-generator unit shall be based on the most unfavorable ambient conditions at the installation site. (2)Each train shall normally be provided with an individual diesel-generator unit. 3.6Suitability 3.6.1Suitability of the Emergency Power Generating Facil- ity (1)The suitabilit
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