【RCC-M-Edition2007】SUBSECTION_E.doc

design and construction rules for mechanical components of pwr nuclear islandsrcc-msection i : subsection esmall componentsrcc-m - edition 2007subsection ee 1000generale 1000 / 2n 113-2007e 1100introductionthe list and the scope of the components produced in accordance with the requirements of this subsection are given in the equipment specification or the purchase order technical documents, in compliance with the requirements of a 4200.for vessels, heat exchangers, piping and valve components, the applicable requirements of this subsection are those given in chapters e 1000 to e 4000 inclusive.for pumps, the applicable requirements of this subsection are given in chapters e 1000 and e 5000. additional requirements may be given in the equipment specification or in the technical documents of the pump purchase order. these requirements may be based on the following chapters in particular: e 2000, e 3100 and e 4000.whenever annex zs is explicitly required by the contract, it supplements the requirements of this subsection whenever necessary.e 1200quality assurancethe requirements of chapter a 5000 apply to small components placed in rcc-m class 2 or 3 in compliance with a 4250.these components are often subcontracted by the manufacturer upon receipt of a purchase order for the entire equipment from the contractor. the manufacturers attention is drawn to the fact that in this case he must specify to his subcontractor(s) the requirements with regard to quality assurance, adapted to the type of technical services performed, in compliance with a 5110.e 1300documents to be submitted by the component suppliere 1310vessels, heat exchangers, piping, valvesthe component supplier shall transmit at least the following documents to the issuer of the purchase order:-general drawing of the component (isometric projections or equivalents for instrumentation piping) and the nomenclature for the basic parts giving the material selected,-the catalogue of welded joints (see definition in annex h 1. 1120),-sizing report,-end-of-manufacturing certificate as defined in a 3804.e 1320pumpsthe pumps covered by this subsection are commonly produced by the manufacturers and therefore correspond to existing models which can, if necessary, be subject to minor adaptation. these pumps can also be made of current manufacturing elements provided these elements were previously used to constitute pumps falling within the scope of validation for the pump to be established according to e 5300.the component manufacturer shall transmit at least the following documents to the issuer of the purchase order:-the pump reference filethe pump reference file shall contain not only the equipment description and nomenclature but also the procurement, manufacture, control and test conditions for the component.note: this file completely identifies the pump. it must therefore specify all the options retained and be precise and complete in order to avoid any ambiguity during pump acceptance.-the model validation file comprising the reference document for the model*, the test programme and the validation test report.note: after agreement of the issuer of the purchase order has been obtained, the model can be part of the order.-the component validation file (where applicable).this file comprises the same elements as the model validation file.-the sizing report, if specified in the purchase order.-the end-of-manufacturing certificate defined in a 3804, in particular certifying compliance with the reference document.* if the model is not identical to the pump ordered.e 2000materialse 2100applicable standards e 2110list of afnor standardsfor the procurement of products, the manufacturer shall use the following afnor standards in addition to the requirements of e 2200. the equipment specification or technical documents in the purchase order can specify the standard, the nature and the grade of the product to be used.1) alloyed and carbon steels-plates: nf en 10025-1 and 2nf en 10028-1nf en 10028-2nf en 10028-3nf a 36-210-forgings: nf en 10083-1 to 3nf en 10084nf en 10222-1 and 2nf en 10250-1 to 3nf en 10263-1 to 4-pipes : nf en 10216-1nf en 10216-2nf en 10217-1nf en 10217-2-castings: nf a 32-054nf en 10213-2nf en 10213-3-bolting for general use: nf en iso 898-1nf en 20998-22) austenitic and austenitic-ferritic stainless steels-plates: nf en 10028-7nf en 10088-2-castings: nf en 10213-4nf en 10283e 2000 / 2n 113-2007-pipes: nf en 10216-5nf en 10217-7nf a 49-214-bars: nf en 10088-3nf en 10263-5nf en 10269for standard nf en 10269, if grade x6nicrtimovb 25-15-2 is used, heat treatments shall be carried out according to the requirements stipulated in specification m 5110.-bolting for general use: nf en iso 3506-1nf en iso 3506-2e 2120acceptance conditionsthe products will be ordered according to standard nf en 10021 with a specific inspection and delivered with an acceptance certificate, the indications of which correspond at least to those required in the type 3.1 specific inspection certificate according to standard nf en 10204.e 2130other standardssubject to the contractors approval, the manufacturer may propose application of other french or foreign standards containing, either directly or by means of addenda, the technical requirements considered to be equivalent.e 2200additional provisionsthe details below shall be taken into account when applying the standards mentioned in e 2100.e 2210melting process - chemical compositione 2211carbon and alloy steels for weldingwhen dealing with carbon and alloy steel products for welding, the killed grades will be selected and a ladle analysis will be made of the contents of the following elements: c 0.25%; s 0.040%; p 0.040%.e 2212chemical composition of austeniticor austenitic ferritic stainless steelsif the risk of intergranular corrosion is to be taken into account, this is specified in the documents attached to the purchase order. in this case only those austenitic or austenitic-ferritic stainless grades with a very low carbon content or which are stabilized shall be adopted.e 2213cast carbon steelsusable nf a 32-054 grades are ge 230, ge 280, ge 320 and ge 370.e 2220heat treatmentsthe products shall be delivered in the heat treated condition as per the reference standard (or in the solution heat treated condition for austenitic or austenitic-ferritic stainless steels).if the product is to be subjected to stress relieving heat treatment, any lowering of the mechanical properties of it as a result of these treatments must be evaluated to ensure compatibility with the acceptable stresses used in the calculations. standard nf a 36-200 may be used for this.e 2230examinatione 2231pipinginstrumentation piping shall be subjected to ultrasonic examination as per the procedures and criteria laid down in standard nf a 49-214.e 2232casting partsthe welding areas of castings shall be subjected to liquid penetrant examination.additional magnetic particle, liquid penetrant or radiographic examination may be required and will then be mentioned in the equipment specification or the technical documents attached to the purchase order. in this case, it is recommended that the following be respected:-magnetic particle examination as per standard nf en 1369,-liquid penetrant examination as per standard nf en 1371-1.for both these examination methods, the faults to be eliminated or repaired are those giving linear or non linear indications of a dimension greater than 5 mm. only indications greater than 2 mm are taken into account,-radiographic examination as per standard nf en 12681 with severity level accordingannex a:. 1 for welding areas. 3 for the other parts.note: the test class (a or b) as per standard en 444 will be specified to the order.e 2000 / 4n 113-2007e 3000designe 3100general design rules e 3110introductionsubchapter e 3100 gives the general requirements applicable to vessels, heat exchangers and piping. subchapter e 3200 specifies the design rules applicable to vessels and heat exchangers and subchapter e 3300 those applicable to piping.e 3120operating conditionse 3121generalduring operation, a component may be subjected to various conditions: normal, upset, emergency, faulted, testing, to which is added a conventional condition known as the design condition.these operating conditions, the associated criteria levels and the loads to be taken into account, are specified in the purchase order.e 3122conventional or design conditionthis condition is characterized by the most severe loads to which the component is subjected under the normal conditions defined below. unless otherwise specified in the purchase order, reference may be made to e 3160.e 3123normal conditionsnormal 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.e 3124upset conditionsupset conditions are the conditions to which the component may be subjected in the course of normal operating incidents.e 3000 / 2n 113-2007e 3125emergency conditionsemergency conditions are the conditions to which the component may be subjected in the case of very infrequent incidents, but which must nonetheless be considered.e 3126faulted conditionsfaulted conditions are conditions which are highly improbable but whose consequences are nonetheless studied. only those conditions whose probability does not make them practically inconceivable need be considered.e 3127test conditionstest conditions are the conditions to which the component is subjected during hydrostatic testing. any other tests shall be classified under one of the categories defined above.e 3130loads and loadingse 3131loads associated with the design or reference conditionthese loads are defined in the following subparagraphs:e 3131.1design or reference pressurethis pressure shall not be less than the maximum difference between the internal and external pressures which can exist under the conditions defined in e 3123.a single design pressure is selected for each vessel. the walls separating two chambers (e.g. heat exchanger plates and tube bundles) are analyzed separately for the design conditions of the two vessels; it is postulated that there is no back-pressure on the outside of the vessel analyzed.e 3131.2design or reference temperaturethe temperature taken for a given zone shall not be less than the maximum value of the average wall temperature likely to be encountered in this zone under the conditions defined in e 3123.this temperature may be taken as equal to the maximum temperature of the fluid contained under normal operating conditions.this temperature must be used in conjunction with the pressure defined in e 3131.1.e 3131.3other design or reference loadsother loads to be taken into account at the same time as the design pressure may be determined and specified in the purchase order. they may chiefly concern seismic loads.e 3132loads associated with normal, upset, emergency and faulted conditionsamong those loads associated with the different conditions, the following shall be specified in the purchase order, where applicable:-pressure acting on the component,-loads due to weight and to connections with adjacent components,-specified seismic loads,-where applicable, thermal effects (fluid temperature and transfer conditions).e 3133loadingthe set of loads corresponding to a given condition constitutes a loading.e 3140criteria levelsa criteria level shall be specified for each condition category. the level to be used shall be at least as severe as the one stipulated in e 3150.a set of stress limits is associated with each criteria level. the limits imposed depend on the objectives of this chapter which concern mechanical integrity.e 3150minimum criteria levels applicable in the various condition categoriese 3151design conditionlevel o criteria shall be met under design conditions.e 3152normal conditionslevel a criteria shall be met under normal conditions.e 3153upset conditionslevel b criteria shall be met under upset conditions.n 113-2007e 3000 / 7e 3154emergency conditionsthe criteria stipulated in equipment specification for emergency conditions shall be at least as severe as level c criteria.e 3155faulted conditionsthe criteria stipulated in equipment specification for faulted conditions shall be at least as severe as level d criteria.e 3160combining conditionsin order to simplify matters, the design condition may include all the severest loads to which the component will be subjected during normal, upset, emergency circumstances as defined in e 3120.provided the requirements of level o criteria are met in these conditions, the check on the equipment behaviour in faulted conditions may not be necessary if the comparison between the loads and the criteria levels so justifies.e 3170requirements concerning the application of the rules for determining thicknesses and for geometric designthe rules for determining thickness referred to in this chapter use the most unfavourable loading- allowable stress ks combination occurring under the conditions for which compliance with level o, a, b, c and d criteria is required, or when the positions of e 3160 relating to combinations of conditions are applied.the table below provides value of k to be used in combination with loads associated with the various conditions characterized by the applicable criteria level.required criteria levelk value to be usedo a b c d1111.21.5e 3200design rules for vessels and heat exchangerse 3210generalthis subchapter applies to the design of vessels and heat exchangers.e 3220determining minimum thicknessese 3221generalcylindrical, spherical and conical walls shall meet the requirements of c 3300 relating to the determination of minimum thicknesses, as modified below in e 3222.in the event of conflict between e 3200 and c 3300, the requirements of e 3200 shall be applied.e 3222special considerationsa) paragraph c 3311is not applicable.b) the acceptable stress values s, determined in compliance with the requirements of z iii 300, shall be multiplied by a factor of 0.85 when applying the rules of c 3300 to components or component parts with welded joints, other than:-girth weld joints between a cylindrical or conical part and rotating or annular part,-welded joints for the connection of a nozzle or branch,-welded joints which are only subject to compressive stresses.this multiplication factor must not be confused with the factor k mentioned in e 3170. c) the second dash of c 3353.3.b).1) is not applicable.e 3230analysise 3231requirements concerning the application of the rules for determining thicknesses and for geometric designfor the loadings covered by the rules for determining thicknesses given in c 3320 to c 3360, compliance with these rules is equivalent to respecting the requirements of c 3380 relating to stress limitation when compliance with levels o, a, b, c, d criteria is required (e 3140 and e 3150). the requirements of e 3170 are applicable.e 3232special considerations e 3232.1rules applicable to nozzleswhen external loads transmitted by a pipe are specified, the shell may be oversized thus avoiding detailed analysis of these nozzles.this oversizing is carried out by applying the formulae for determining minimum thicknesses given in c 3300, replacing the design pressure by an increased pressure to take account of the external loads.the equivalent pressure peq is expressed thus*:4 4 mp= p + f + f eqwhere : p = design pressure,d2 dd = inside diameter of the branch,mf = bending moment at nozzle-shell connection,f = traction load acting along the axis of the nozzle.*in order to determine this equivalent pressure, coherent units shall be used for the various items (e.g. p expressed in pa, d in m, f in n, and mf in nm).e 3300design rules for piping e 3310generalthis subchapter applies to piping design.e 3311general requirements e 3311.1allowable stressesthe allowable stresses s used in this subchapter are determined in accordance with the provisions of annex z iii 300.e 3311.2general requirements relating to piping analysis and applicable criteriaa) the pressure sizing shall be verified in accordance with e 3340,b) the analysis of piping subjected to the individual or combined effects of the loadings defined in e 3100 and e 3320 shall be performed in accordance with the requirements of e 3340 and