《【RCC-M2000】VOLUME_G.pdf》由会员分享，可在线阅读，更多相关《【RCC-M2000】VOLUME_G.pdf（69页珍藏版）》请在三一文库上搜索。
1、DESIGN AND CONSTRUCTION RULES FOR MECHANICAL COMPONENTS OF PWR NUCLEAR ISLANDS R RC CC C- -M M S S SEE ECC CT T TIIIO O ON N N III : : : S S SUU UB B BSS SE E ECC CT T TIIIO O ON N N G G G C CO OR RE E S SU UP PP PO OR RT T S ST TR RU UC CT TU UR RE ES S RCC-M - Edition 2000 Subsection G n 92-2000 G
2、 1000 / 1 G 1000 GENERAL G 1100 INTRODUCTION G 1110 CLASSIFICATION OF COMPONENTS In accordance with A 4310, component parts of reactor internals shall be classified into two categories: core support structures (CS) and internal structures (IS). a) Core support structures (CS) are those structures or
3、 parts of structures which provide support and restraint of the fuel assemblies making up the core within the reactor pressure vessel. Structures designed to support or restrain the core only after the postulated failure of core support structures are classified as internal structures (IS). b) All o
4、ther reactor internal structures shall be classified as internal structures (IS). c) For the purposes of chapters G 4000 and G 5000 only, welds joining internal structures (IS) to core support structures (CS) shall be considered to be core support structures (CS). G 1120 ORGANIZATION OF SUBSECTION G
5、 Subchapter G 1200 specifies the documents to be prepared. Subchapter G 1300 specifies the procedure for identification of component parts and welded joints. Chapter G 2000 specifies the rules for selection of materials for all core support structures and for some internal structures. Chapter G 3000
6、 specifies rules for design. Chapter G 4000 specifies rules for fabrication and examination. Chapter G 5000 specifies supplementary requirements for non-destructive examination given in SECTION III. RCC-M Addendum June 2002 Subsection G G 1000 / 2 n 96-2002 G 1200 REQUIRED DOCUMENTS Chapter A 3000 d
7、efines these documents and describes their content. Documents required under this subsection shall be kept at the disposal of Surveillance Agents. The contract shall specify which documents are to be handed over to the relevant parties. G 1210 DOCUMENTS RELATING TO REACTOR INTERNALS The following do
8、cuments shall be prepared for components failing within the scope of subsection G. Where production conditions so permit, an entire lot of components may be covered by the same documents. G 1211 DOCUMENTS ATTACHED TO THE PURCHASE ORDER FOR REACTOR INTERNALS Equipment specification (purchase order te
9、chnical addenda) - A 3100. G 1212 PRELIMINARY DESIGN AND MANUFACTURING DOCUMENTS FOR REACTOR INTERNALS Comprehensive layout and referencing drawing - A 3201. Sizing report for core support structures (CS). Technical equipment manufacturing programme for reactor internals - A 3301. G 1213 DOCUMENTS P
10、REPARED AND UPDATED DURING FABRICATION Comprehensive layout and referencing drawing - A 3201. Stress report for core support structure (CS). Welding data package - A 3501. The welding data package shall be established for core support structures (CS) and shall be updated to take into account modific
11、ations in welding procedures. Non-conformance or deviation reports - A 3700. Follow-up documents - A 3801. G 1214 POST-MANUFACTURING DOCUMENTS End-of-manufacturing report - A 3805. Certificate of compliance - A 3804. RCC-M Addendum June 2002 Subsection G n 96-2002 G 1000 / 3 G 1220 DOCUMENTS FOR COM
12、PONENT PARTS OF REACTOR INTERNALS G 1221 PROCUREMENT DOCUMENTS Part and product manufacturing programme A 3301. Purchase order (technical and contractual clauses) - A 3302 (which refers in turn to SECTION II, chapter M 110). Procurement specification, SECTION II (chapter M 110) states the conditions
13、 under which a special procurement specification must be established. Filler material procurement specification - A 3502 (which refers in turn to S 2120). Filler material acceptance report - A 3503 (which refers in turn to S 2550). Component part follow-up documents - A 3801. This quality plan is on
14、ly drawn up for parts covered by a part procurement specification. (Other parts shall be included in the quality plan for the component of which they are a part.) G 1222 MANUFACTURING DOCUMENTS Fabrication instructions - A 3401 Welding instructions - A 3502 Welding report - A 3503 Examination instru
15、ctions - A 3601 Examination report - A 3602 Production weld data sheet - A 3503 G 1223 INSPECTION DOCUMENTS List of examination personnel (in preparation). G 1224 NON-CONFORMANCE OR DEVIATION REPORTS See A 3700. G 1300 IDENTIFICATION G 1310 PURPOSE OF EQUIPMENT IDENTIFICATION SYSTEM The equipment id
16、entification system is a means of unequivocally associating a part or weld joint with a given set of documents. RCC-M - Edition 2000 Subsection G G 1000 / 4 n 92-2000 G 1320 ADAPTATION OF IDENTIFICATION SYSTEM TO PRODUCTION CONTROL METHODS Identification procedures must, therefore, be adapted to the
17、 type of production control method applied to the part or weld: - control of individual items, using one identification number per item, - control by lot, using one identification number per lot. When a part is taken directly from stock and has only a steel grade number, the identification procedure
18、s set forth in the RCC-M shall not apply to the Manufacturer. G 1330 IDENTIFICATION METHODS Methods used to identify the components may include: - engraving, - temporary marking (with ink, paint, etc.), - labelling, - routing slips. Identification methods and shop organization procedures shall be de
19、fined with a view to ensuring compliance with the objective set under B 1310. G 1340 TYPE OF IDENTIFICATION DATA The RCC-M does not require information related to the origin of any part or weld (such as lot No., heat-treatment No., welding operator No., heat No., etc.) to be marked or written on tha
20、t item itself, its label, or its routing slip. However, marks or codes which provide clear reference to documents containing the information required for production control will always be acceptable. Where lots are subdivided into one or more fabrication lots (e.g. for heat treatment) the original l
21、ot number need not appear on each item provided that the new identification system allows for accurate identification of the items origins. G 1350 RE-MARKING AND RELABELLING If an identification code is removed or erased during fabrication, the Manufacturer shall mark or label another portion of the
22、 part as appropriate. RCC-M - Edition 2000 Subsection G n 92-2000 G 1000 / 5 Machined items belonging to the same lot do not need to be re-marked after each machining operation, provided that: - fabrication procedures provide for total segregation of lots, - rejects are marked immediately, visibly a
23、nd indelibly. In the particular case of plates, where rolling direction is of significance for subsequent fabrication or testing (e.g. removal of test sample), this information must appear on the item involved. Discard shall always be identified according to its intended use. G 1360 MARKING METHODS
24、Marking methods shall comply with requirements given in chapter F 2000. G 1370 REFERENCING OF WELDS G 1371 WELDS ON LARGE FABRICATED COMPONENTS A drawing shall be made of the location and position of welds on large fabricated components. This drawing, which may be the comprehensive layout drawing, s
25、hall give the dimensions of weld axes (whether the welds are flush or not) with respect to a set of identification marks (which may consist of marks on the part itself or of machined surfaces used as reference planes). It must mandatorily be possible to detect the marks visually or by means of an op
26、tical instrument. For radiographically examined welds, the drawing or attached document must clearly indicate the location of the welds and the position of identification marks in order that radiographic films be interpreted and their position unequivocally established. G 1372 WELDS ON OTHER STRUCTU
27、RES A referencing drawing must be made for other structures particularly interchangeable structures, to indicate their location with respect to the equipment. Sufficient information must be provided for each structure to enable the location and position of the structure to be determined. Azimuth ind
28、ication shall not be required for such structures. RCC-M - Edition 2000 Subsection G G 1000 / 6 n 92-2000 RCC-M - Edition 2000 Subsection G n 92-2000 G 2000 / 1 G 2000 MATERIALS G 2100 GENERAL Chapter G 2000 sets out conditions for selection and use of materials for the manufacture of products and p
29、arts up to acceptance for the structures covered by Subsection G. Where appropriate, reference is made to SECTION II, “MATERIALS“. Note: The terms “ferritic steels“ and “austenitic steels“ have sometimes been wrongly used in the various sections of this Code. Materials corresponding to procurement s
30、pecification series M 3300, M 3400 and M 4000 of SECTION II, shall be considered as belonging to the category “austenitic steels“. Other materials belong to the category “ferritic steels“. G 2200 APPLICATION OF SECTION II The requirements of chapter M 100 shall be applicable. Table G 2200 lists the
31、procurement specifications to which the Manufacturer shall refer for core support structures and certain internal structures. Where a choice is involved, such choice may be limited by conditions specified in the equipment specification. Class 1 criteria shall be applicable for the acceptance of mate
32、rials for core support structures. G 2300 SUSCEPTIBILITY TO INTERGRANULAR CORROSION G 2310 RULES FOR CLASSIFYING MATERIALS ACCORDING TO SUSCEPTIBILITY TO INTERGRANULAR CORROSION Reactor internals made from austenitic or austenitic-ferritic stainless steel shall be classified according to susceptibil
33、ity to intergranular corrosion into one of the following two groups: Group 1: materials which are possibly contaminated and are heated after solution heat treatment to a temperature of more than 450C. RCC-M - Edition 2000 Subsection G G 2000 / 2 n 92-2000 All items subjected to any type of welding s
34、hall be classified “group 1“. Castings which may be repaired by welding shall also be classified “group 1“. Group 2: materials which are possibly contaminated and are never heated after solution heat treatment to a temperature of more than 450C. The potential impact of intergranular corrosion on saf
35、ety is so serious that even the most remote risk of contamination must be taken into consideration. G 2320 REQUIREMENTS G 2321 SELECTION OF STEEL GRADES Selection of steel shall be subject to the following restrictions. Group 1 is more restrictive than group 2. For group 1: very-low-carbon austeniti
36、c stainless (and, where appropriate, controlled nitrogen content) steels with or without molybdenum; or austenitic-ferritic steel castings. For group 2: low-carbon austenitic stainless steels (type Z5 CN 18-10) with or without molybdenum and type Z6 CND 17-12 for bolting materials. The equipment spe
37、cification may stipulate which grade of steel in the group is to be used. G 2322 DETECTING SUSCEPTIBILITY TO INTERGRANULAR CORROSION Unless otherwise stated in the procurement specifications, detecting susceptibility to intergranular corrosion is required for group 1 materials, in cases where the ca
38、rbon content as determined by ladle analysis is: - above 0.030% for austenitic stainless steels, - above 0.035% for controlled nitrogen austenitic stainless steels, - above 0.040% for cast austenitic-ferritic stainless steels, Detecting susceptibility to intergranular corrosion is required using tes
39、t specimens for group 2 materials, after non-sensitized solution heat treatment as specified in MC 1300, in cases where the carbon content as determined by ladle analysis is above 0.030%. The requirements are given in the relevant procurement specifications. RCC-M - Edition 2000 Subsection G n 92-20
40、00 G 2000 / 3 G 2400 COBALT CONTENT OF STAINLESS STEELS USED FOR REACTOR INTERNALS AND OF NICKEL-CHROMIUM-IRON ALLOYS Where the component parts of reactor internals are covered by a part or product procurement specification relating specifically to such parts, the cobalt content shall be stipulated
41、in the procurement specification. Other component parts fall into two groups: - components located near to the reactor core and subjected to high neutron bombardment shall have a maximum cobalt content of 0.10%. These components must be individually listed in the equipment specification. This covers
42、 the following components in particular: lower core barrel, baffles, formers, upper and lower neutron pads. - other components shall have a maximum cobalt content of 0.20%. TABLE G 2200 CORE SUPPORT STRUCTURES INTERNAL STRUCTURES Forgings M 3301 Castings. M 3405 Plates. M 3310 Forgings for: -upper s
43、upport plate -core support plate M 3302 Tubes. M 3304 Bars for bolting material and fuel assembly positioning pins M 3308 Bolts M 5140 Inconel 600 forgings M 4102 Parts made from Inconel X 750 M 4104 Outlet nozzlesM 3301 class 2 Thermal screens.M 3307 (where applicable) class 2 Bars for bolting mate
44、rials M 3308 M 5110 (1) Bolts.M 5140 Hold-down springM 3205 Inconel X 750 split pins.M 4104 (1) Only applies to the attachment screws for the guide tubes alignment frames. RCC-M - Edition 2000 Subsection G G 2000 / 4 n 92-2000 RCC-M - Edition 2000 Subsection G n 92-2000 G 3000 / 1 G 3000 DESIGN G 30
45、10 GENERAL REQUIREMENTS FOR ACCEPTABILITY The requirements for the acceptability of core support structure design are provided by satisfying either (1) or (2) below. (1) ASME Code Section III: NG 3100, NG 3200 plus NCA paragraphs and various technical annexes cited. Code cases listed in the equipmen
46、t specification. RCC-M G 3300. The applicable editions of each document shall be specified in the equipment specification. (2) RCC-M G 3100, G 3200 and G 3300. G 3100 GENERAL DESIGN RULES G 3110 PURPOSE This chapter provides the rules applicable to the sizing of core support structures and to the an
47、alysis of their behaviour under the effect of loadings stipulated in equipment specifications. These design rules are not intended to address the satisfaction of functional requirements such as leaktightness, mobility, or maintenance of acceptable geometry. These considerations will be covered by th
48、e equipment specifications. G 3120 CONDITIONS During operation, a component may be subjected to various conditions; these conditions are classified into four categories to which is added a conventional reference condition G 3121 DESIGN CONDITION The design condition is characterized by the design lo
49、ads (G 3132) defined on the basis of the most severe loads to which the component is subjected under the normal conditions defined below. RCC-M - Edition 2000 Subsection G G 3000 / 2 n 92-2000 G 3122 NORMAL CONDITIONS Normal conditions are the conditions to which the component may be subjected in the course of normal operation (i.e. steady-state power operation and transients corresponding to normal operation). G 3123 UPSET CONDITIONS Upset conditions are the conditions to which components may be subjected in the course of