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1、A2011.12CFCie stage 2版次日期状态编写校对审核批准修改-说明GUANGXICHENGGANG NUCLEARER SION PROJECT PHASE I (21000MW)广西防城港核电厂一期（21000MW）工程DOC. NO.BLX17SVA004GJS045GNTITLE:题目SYSTEM DESIGN MANUAL AUXILIARYDISTRIBUTION SYSTEMCHAPTER 4 DESCRIPTION AND DEFINITION OF EQUIPMENT辅助蒸汽分配系统设计手册第四章 设备的说明和定义参考电站编码 ReferenceREV.C A T

2、 E G O R YA: Identical（+FCR，FCN，DEN，CIN，OROTHERS，IFANY）B: ModifiedC: NewIed by国 家 综 合 甲 级号: A144004317GEDI省电力GUANGDONG ELECTRICER DESIGN INSTITUTE设计院内部编码44-H0201S-J4110-04ernal Identification NumberThisis the property of GEDI. It must not be used, reproduced, transmitted or disclosed without the pri

3、or written permis of GEDI. 本文件之产权属于 省电力。未获我院 ，任何人不得擅自使用、 、传递或泄露该文件。批准：张鹏审核：校对：郑军编写：胡琨CHAPTER 4 - DESCRIPTION AND DEFINITION OF EQUIPMENT4.1DESCRIPTIONRefer to the following diagrams and assoted systems, listed below.(i)Diagram of Auxiliary BL117SVA502GJS045DDDistribution System(ii)Diagram of Auxilia

4、ry BL217SVA503GJS045DD.Distribution SystemUnit 1Refer to the diagram BL117SVA502GJS045DD.Auxiliaryat 12 bar abs and 188 is fedo the distributionmain from the pipe to supplyTransformer system (STR). There is also anerconnectingauxiliaryfrom Auxiliary boilers(XCA) via the 0SVA.A prere reducing sion ob

5、tainfrom Auxiliary boilers (XCA) via the 0SVA inUnit 1 Conventional Island only and which reduprere and temperature to4.5 bar abs and 165 for distribution to the Nuclear Island and the Auxiliary Feedwater system (ASG) .The systemppd from the auxiliarydistribution system are described below.4.1.1Hot

6、Watroduction only for unit 1(SES)Depending on the prevailing climatic conditions heatingmay bed to the above calorifier at a rate of 2.0446t/hr, 12 bar abs and 188.Of thisall will return as condensate to the auxiliarydeaerator.4.1.2Feedwater Deaeratingand Gas Stripper (Unit 1) (ADG)A supply of heati

7、ng 12 bar abs and 188.ippd to the deaerator during start up of 18t/hr4.1.3Transformer Deaerator (STR)IeABCDEFGDate2011.12BLX17SVA004GJS045GNGEDI1/4CHENGGANGUnder normal running conditions a supply of 2.355 t/hr ofat 12 bar abs188 is fed by the distribution systemo the transformer deaerator.During a

8、start up condition of one unit the demand of auxiliary4.548 t/hr.rises to4.1.4Auxiliary Feedwater (ASG)may be condition. Thed to this system for heating, although only on a standbyippd at 4.5 bar abs and 165 from the prerereducing sion in Unit 1 conventional island. The normal demand, if required,is

9、 4.3 t/h and condensate returns to thetransformer deaerator. Theflowrate can under exceptional conditions momentarily reach 10 t/h (rare occurrence).4.1.5Turbine Gland (CET)During start up conditions auxiliaryis required fland sealing. Theisd at 6.5 bar abs and 172 from the prere reducingsion. Note:

10、 When consumptionthe turbine glands are in new condition, the gland will be 6.012 t/h. When the glands are worn, theconsumption will increase to 9.0 t/h.Unit 2Refer to the diagram BL217SVA503GJS045DD.This diagram dcts three feed user sions taking theirions are on Unit 2, theirs from the auxiliarycon

11、sumptionsfeed main. Although these user s are identical to those already described.Please refer to4.1.2For Feedwater Deaerating and Gas StripperADG (at 12 bar abs 188)4.1.34.1.5ForTransformer DeaeratorSTR ( CET (at 12 bar abs 188) at 6.5 bar abs 172)For Turbine GlandIeABCDEFGDate2011.12BLX17SVA004GJ

12、S045GNGEDI2/4CHENGGANG4.2CHARACTERISTICS4.2.1System Design DataThe auxiliarytransmitted by this system is at a prere of 12 bar absand a temperature of 188. A taphemain feeds a prerereducing sion where a supply of 4.5 bar abs 165 is made available forheating the Nuclear Island and the auxiliary feedw

13、ater deaerator. A tapinthemain feeds a prere reducing sion where a supply of 6.5 bar land seal heater(CET).abs 172 is made available f4.2.2Prere Reducing SionValve Type Material Inlet pre Outlet preTo ASGGlobe Carbon steel 124.5To CETGlobe Carbon steel 126.5rerebar abs bar abs4.2.3Ref ValveDesign pr

14、e Set prererebar g bar g3.54.54.2.4Trapstraps are egrated.ofthe ball floattype and are provided with astrainerIeABCDEFGDate2011.12BLX17SVA004GJS045GNGEDI3/4CHENGGANG4.3LAYOUT4.3.1A branch from the auxiliarymain in the balance of plant, running at-9.078m level enters the auxiliaries annexe adjacent to B row column 1. Thissupply will be at 12 bar abs 188. The main rises vertically toapproximay +12m level prior to running horizontally to B row betncolumn 6 and column 7. At this poit rises to the +32m level terminating attheconverters near B row column 8