RCC-M-Edition 2007 SECTION I：SUBSECTION H SUPPORTS.pdf

1、RCC-M-Edition 2007 SECTION I：SUBSECTION H SUPPORTS_SUPPORTSSECTION I : SUBSECTION H DESIGN AND CONSTRUCTION RULESFOR MECHANICAL COMPONENTS OF PWRNUCLEAR ISLANDSRCC-MRCC-M - Edition 2007 Subsection H H 1000 GENERAL H 1100 INTRODUCTION Subsection H covers supports for components which are intended to

2、conform to the rules of the RCC-M in accordance with the requirements of chapter A 4000. Subchapter H 1200 defines the scope of this subsection. Subchapter H 1300 gives rules for classification of supports. Subchapter H 1400 defines the different types of supports and attachments, and classifies sup

3、port members into primary (or load-bearing) and secondary (or stabilizing) members. Subchapter H 1500 specifies documents required for supports and support members. Subchapter H 1600 specifies identification procedures for parts and welded joints. Chapter H 2000 contains rules for selection of mater

4、ials for support members. Chapter H 3000 contains design rules for supports. Chapter H 4000 contains rules for fabrication and examination. Chapter H 5000 defines tests and qualification procedures to which standard supports or standard support members may be subjected. Whenever annex ZS is explicit

5、ly required by the contract, it supplements the requirements of this subsection whenever necessary. H 1200 SCOPE H 1210 GENERAL The rules of this subsection apply to supports for components which are intended to conform to the rules of the RCC-M. As used in this subsection, the term support shall en

6、compass structural elements which are intended to carry these loads to the fabric or to a structural steel member of the building structure, in the extent that these structural elements were designed to fulfil this function. n 113-2007 H 1000 / 1 RCC-M - Edition 2007 Subsection H The rules of this s

7、ubsection do not apply to: a) structural steel members* referred to above, forming part of the building structure, and intervening elements in the support load path, as defined in H 1220, such as motors, valve operators, access structures, etc., b) support members, the sole function of which is to c

8、arry dynamic loads caused by loss of pressure retaining integrity. However, the technical provisions of this subsection may be used in full or in part for such members, particularly for those members which are not designed to absorb energy by nonelastic deformation, c) deterioration which may occur

9、in service as a result of corrosion, erosion, radiation effects or instability of the materials. However, where such deterioration is to be expected under normal operating conditions (e.g. deterioration of synthetic materials as a result of radiation effects), the minimum duration of support integri

10、ty shall be stipulated in the equipment specification. The rules of this subsection apply both to elements which carry the weight from above with the supporting member being in tension, and to elements which carry the weight from below the supporting member being in compression. They apply to all de

11、vices used to provide structural stability, to spring loaded sway braces and to vibration dampeners. For these components the rules defined in this subsection are not applicable to the mechanical or hydraulic systems which perform the dampening or dynamic restraint functions. Only the connection of

12、these systems to the component and to the building structure are covered by the requirements of this subsection. * Design of structural steel members shall be such as to permit adjustments during erection at least equal to civil works tolerances. H 1220 JURISDICTIONAL BOUNDARIES OF SUBSECTION H Figu

13、re H 1220 gives an overview of the jurisdictional boundaries of civil structures, of supports assigned to RCC-M Subsection H, and of components assigned to RCC-M Subsections A, B, C, D or E H 1221 JURISDICTIONAL BOUNDARY BETWEEN SUPPORTED COMPONENT AND SUPPORT H 1221.1 Connection between pressure re

14、taining component and integral support a) Integral supports encompass: - integral attachments cast or forged integral with the pressure retaining component, - supports or attachments welded to the pressure retaining component, - supports welded to integral attachments cast or forged integral with th

15、e pressure retaining component. b) In this case, the jurisdictional boundaries of subsection H are as follows: - the pressure retaining component, depending on its class, is subject to the requirements of subsection B, C, D or E, H 1000 / 2 n 113-2007 RCC-M - Edition 2007 Subsection H - integral att

16、achments cast or forged integral with the pressure retaining component shall be subject to the subsection applicable to the pressure retaining component (figure H 1221 sketch (1), - supports or supporting attachments welded to the pressure retaining component shall be subject to the requirements of

17、subsection H. The jurisdictional boundary of subsection H shall, in this case, be the weld joining the integral support to the pressure retaining component. Such welds shall be subject to the requirements of the subsection applicable to the pressure retaining component, in accordance with A 4320 (fi

18、gure H 1221 sketches (2) and (3). H 4400 may specify additional requirements for an area adjacent to the weld, the width of which depends on the examination requirements for the weld. Alternatively, supports or attachments welded to the pressure retaining component may also be treated as parts belon

19、ging to the pressure retaining component, - integral supports welded to an integral attachment cast or forged integral with the pressure retaining component shall be subject to the requirements of subsection H. The jurisdictional boundary of subsection H shall, in this case, be the weld joining the

20、integral attachment to the support. Such welds shall be subject to the requirements of subsection H (figure H 1221 sketch (4), where they are situated outside an area of width 2t on either side of the pressure retaining component. Otherwise, they shall conform to the rules applicable to the pressure

21、 retaining component, unless it can be demonstrated that the connecting zone has no determining effect on the mechanical behaviour of the shell under pressure. * t is equal to the minimum allowable wall thickness at the point of attachment. H 1221.2 Connection between pressure retaining component an

22、d non-integral support a) Non-integral supports encompass: - supports which are bolted, pinned or clamped to the pressure retaining component or which are mechanically attached to an integral attachment cast or forged integral with the pressure retaining component, - supports on which components may

23、 bear directly. Examples of non-integral supports are sliding joints, cradles, saddles or clamps. b) In this case, the jurisdictional boundary of subsection H shall be the contact surface between the pressure retaining component or integral attachment and the non-integral support. The mechanical att

24、achment shall be subject to the requirements of subsection H (figure H 1221 sketches (5) and (6). n 113-2007 H 1000 / 3 RCC-M - Edition 2007 Subsection H H 1222 JURISDICTIONAL BOUNDARY BETWEEN COMPONENT OR SUPPORT AND BUILDING STRUCTURE H 1222.1 Connection between support and building structure a) S

25、upports may be attached to the building structure: - by welding, - by mechanical means, - or they may bear directly on the building structure, - they may also be an integral part of the building structure or be cast or forged integral with an element of the building structure. b) In accordance with

26、H 1210.a), the building structure is outside the scope of this subsection. The jurisdictional boundary of subsection H shall be the surface of the building structure. Where the support is welded to the building structure, the weld shall be subject to the requirements of subsection H (figure H 1222.a

27、 sketch (1). Where the support is attached to the building structure by mechanical means, the mechanical attachment shall be subject to the requirements of subsection H (figure H 1222.a sketch (2). Anchoring devices (anchor rods and expansion shields) are outside the scope of this subsection. Illust

28、rative examples of jurisdictional boundaries are provided in figures H 2222.b, c, d and e. H 1222.2 Connection between pressure retaining component and building structure The boundary for application of rules for pressure retaining components shall be the surface of the building structure. This boun

29、dary definition also applies to components encased in the building structure. The rules of subsection H apply to connections between the component and the building structure (figure H 1222.a sketch (3). The above provisions also apply where integral attachments cast or forged integral with the press

30、ure retaining component bear directly on the building structure (figure H 1222.a sketch (4). H 1222.3 Intervening elements Intervening elements not subject to RCC-M rules and referred to in H 1210.a) as intervening elements in the support load path between the pressure retaining component and the bu

31、ilding structure, without being specially designed to fulfil this function, may be located between the component and the support, between two support members or between the support and the building structure. Jurisdictional boundaries shall be those given in H 1222.1 for supports connected to interv

32、ening elements and in H 1222.2 for pressure retaining components connected to intervening elements. In applying these provisions, intervening elements shall be considered as part of the building structure. Connections between intervening elements and the building structure are outside the scope of s

33、ubsection H. H 1000 / 4 n 113-2007 RCC-M - Edition 2007 Subsection H H 1300 CLASSIFICATION OF SUPPORTS H 1310 SUPPORT CLASSES Supports are classified into two classes: S 1 and S 2. Support classes are a function of the class assigned to the supported component. - A support for a class 1 component is

34、 classified S 1. - A support for a class 2 or 3 component is classified S 2. Where the support is common to components of different classes, it shall be classified under the most stringent class. H 1320 CHANGES IN CLASSIFICATION For each support, the Manufacturer shall assign the applicable class de

35、fined in H 1310. However, if the Manufacturer wishes, for example, to standardize production, he may assign a more severe class to certain supports (or support members). He shall inform the Contractor of this action and shall apply in full the requirements of the most stringent class to the support

36、or member concerned. H 1330 APPLICATION OF THIS SUBSECTION ACCORDING TO CLASS For the purposes of materials acceptance, fabrication, examination, or storage, the Manufacturer may apply to any support (or support member) the rules corresponding to a more severe class than that initially assigned. How

37、ever, such supports (or support members) shall not be reclassified unless all the rules corresponding to the more stringent class are fully applied. H 1400 TYPES OF SUPPORTS AND ATTACHMENTS H 1410 TYPES OF SUPPORTS H 1411 GENERAL a) In this subsection, all component supports are categorized into thr

38、ee separate types which are defined in paragraphs H 1412, H 1413 and H 1414. b) In applying the requirements of H 4100, members of supports are classified into two groups according to their function and the stresses to which they are subjected: - group 1 members are primary (or load bearing) members

39、 the function of which is to carry the specified loads associated with the various loading conditions, n 113-2007 H 1000 / 5 RCC-M - Edition 2007 Subsection H - group 2 members are secondary members typically used as bracing to maintain group 1 member system geometry; such members are not designed t

40、o sustain any significant stress under operating conditions, or are only required to perform their function during installation. Accordingly, only members which are subjected to stresses less than 50% of the allowable limits permitted in H 3000 or annex Z VI, or members which are not considered in s

41、ubstantiating the mechanical behaviour of supports, may be considered as group 2 members. However, standard support members, as defined in H 1414, may be considered as group 2 members irrespective of function, provided that the level of stress in the member is less than 50% of the allowable limits p

42、ermitted in H 3000 or annex Z VI. H 1412 PLATE OR SHELL TYPE SUPPORTS Plate or shell type supports are supports such as vessel skirts and saddles which are fabricated from plate and shell elements and are normally subjected to a biaxial stress field. H 1413 LINEAR TYPE SUPPORTS A linear type support

43、 is defined as acting under essentially a single component of direct stress. It is defined in accordance with beam theory. Examples: tension and compression struts, beams and columns subjected to bending, trusses, frames, rings, arches and cables. Such elements may also be subjected to shear stresse

44、s. H 1414 STANDARD SUPPORTS OR STANDARD SUPPORT MEMBERS a) Definition A standard support is a support assembly consisting of one or more member usually normalized or listed in a catalogue of items and generally mass produced. Standard supports and standard support members may be approved: - either i

45、n accordance with the requirements of H 5000, - or in accordance with the requirements of H 2000 to H 4000. Typical standard support members are shown in figure H 1414. Standard supports are usually of the linear type but may also be of the plate or shell type. H 1000 / 6 n 113-2007 RCC-M - Edition

46、2007 Subsection H b) Types of standard supports The types of standard supports considered are those listed in (a) to (e) below: (a) : rigid supports: anchors, guides, restraints, rolling or sliding supports, and rod type hangers, (b) : constant and variable type support spring hangers, (c) : snubber

47、s, (d) : sway braces and vibration dampeners, (e) : integral and non-integral structural attachments, such as ears, shoes, lugs, rings, clamps, straps, and clevises. H 1420 TYPES OF ATTACHMENTS Connections between components and supports may be obtained by welding or by use of integral attachments c

48、ast or forged integral with the pressure retaining component or mechanical means. The jurisdictional boundaries of subsection H are given in H 1221. H 1500 REQUIRED DOCUMENTS Required documents and their contents are given in chapter A 3000. Documents required under this subsection are those which a

49、re kept available for Surveillance Agents; documents to be submitted shall be as stipulated in the contract. H 1510 DOCUMENTS RELATING TO COMPONENT SUPPORTS The documents listed in the following paragraphs shall be prepared for all supports subject to the requirements of this subsection. They may be prepared per lot of supports where this is compatible with fabrication conditions, e.g. in the case of standard supports acceptance tested in accordance with H 5000. H 1511 DOCUMENTS ATTACHED TO THE PURCHASE ORDER - Equipment specification