1、N290.13-05(reaffirmed 2015)Environmental qualification of equipment for CANDU nuclear power plantsLegal Notice for StandardsCanadian Standards Association (operating as “CSA Group”) develops standards through a consensus standards development process approved by the Standards Council of Canada. This
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15、orm:sLOADTHISDOCUMENTONTOACOMPUTERFORTHESOLEPURPOSEOFREVIEWINGITsSEARCHANDBROWSETHISDOCUMENTANDsPRINTTHISDOCUMENTIFITISIN0$ “should” is used to express a recommendation or that which is advised but not required; “may” is used to express an option or that which is permissible within the limits of the
16、 standard; and “can” is used to express possibility or capability. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are conside
17、red part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.1(Replaces p. 1, February 2005)N290.13-05 Canadian Standards AssociationOctober 20092 Reference publicationsThis Standard refers
18、 to the following publications, and where such reference is made, it shall be to the edition listed below.CSA (Canadian Standards Association)N286 series of Standards:N286.2-00Design Quality Assurance for Nuclear Power PlantsN289 series of Standards:CAN3-N289.1-80 (R2003)General Requirements for Sei
19、smic Qualification of CANDU Nuclear Power PlantsCAN3-N289.4-M86 (R2003)Testing Procedures for Seismic Qualification of CANDU Nuclear Power PlantsZ299 series of Standards:CAN3-Z299.0-86 (R2002)Guide for Selecting and Implementing the CAN3-Z299-85 Quality Assurance Program StandardsASME (American Soci
20、ety of Mechanical Engineers)QME-1-2001Qualification of Active Mechanical Equipment used in Nuclear Power PlantsIEC (International Electrotechnical Commission)60780:1998Nuclear power plants Electrical equipment of the safety system QualificationIEEE (Institute of Electrical and Electronics Engineers,
21、 Inc.)323-2003IEEE Standard for Qualifying Class 1E Equipment for Nuclear Power Generating Stations3 DefinitionsThe following definitions apply in this Standard:Note: To maintain consistency in all aspects of the program, the terminology described in this Clause is to be used in the presentation and
22、 evaluation of related environmental qualification topics and issues.Acceptance criteria the established physical, measurable parameters that relate to the capability of a piece of equipment to perform its required safety function.Aging stressor an agent or stimulus that results from exposure to ser
23、vice conditions and that can produce a time-dependent degradation of systems, structures, or components. Aging stressors include heat, radiation, and mechanical cycling.Arrhenius model a mathematical model of the relationship of the variables of time and temperature to the deterioration of non-metal
24、lic materials. (See Annex A.)Condition monitoring the techniques employed to assess degradation related to aging of EQ equipment in the field. Condition monitoring is both quantitative and predictive, and therefore provides information necessary to track trends in equipment aging and to estimate the
25、 equipments useful life.(Replaces p. 2, February 2005)2 Canadian Standards AssociationEnvironmental qualification of equipment for CANDU nuclear power plantsOctober 20094.4.3 Accident service conditions4.4.3.1 Accident environmental conditionsAccident environmental conditions are a subset of acciden
26、t service conditions and are associated with the stressors imposed by the plants accident environment. These stressors include temperature, pressure transients, radiation, humidity, submergence, and any other environmental stressor. Accident environmental conditions result from design basis accident
27、s that impact on a wide area and cause increased stress on equipment. These conditions shall be defined. 4.4.3.2 Accident operating conditionsAccident operating conditions are a subset of the accident service conditions associated with the stressors imposed by equipment operation during a design bas
28、is accident, including any of those stressors outlined in Clause 4.4.2.2. These conditions shall be defined.4.5 Equipment requiring qualificationEnvironmental qualification of equipment shall address the equipments capability to operate in the potentially harsh conditions resulting from a design bas
29、is accident. Equipment shall require qualification if the conditions resulting from a design basis accident increase the relevant stressors. If it can be shown that the change in environmental conditions does not increase the stress on the equipment under consideration, qualification might not be re
30、quired.Annex B provides non-mandatory guidelines for threshold values of environmental stressors for which qualification is required.4.6 Documentation of EQ requirementsBased upon the identification of EQ requirements, a list of equipment shall be prepared. The list shall contain the following attri
31、butes for each piece of equipment or shall reference the source of such information:(a) equipment identification (e.g., make, model number, manufacturer, stock identification, plant system, installed location, and relevant interfaces);(b) safety function;(c) applicable design basis accident;(d) miss
32、ion times; and(e) normal and accident service conditions.4.7 Demonstration of qualificationA review shall be performed for each piece of equipment in the list prepared in accordance with Clause 4.6 to determine the need for formal qualification. In some cases there might be no known failure mode for
33、 the equipment that would prevent it from performing its required safety function. Where this can be documented, no further qualification effort is necessary. All other equipment shall be qualified as described in Clause 5. For all qualified equipment, the following shall be provided:(a) an overall
34、conclusion as to the qualification of the equipment, including limitations to the validity of the qualification;(b) identification of any installation or configuration constraint that is imposed to ensure that equipment qualification is preserved throughout the life of the plant; and(c) identificati
35、on of a qualified life and all maintenance and surveillance required to ensure that qualification is preserved throughout the life of the plant.5(Replaces p. 5, February 2005)N290.13-05 Canadian Standards AssociationOctober 20095 Establishing environmental qualification5.1 GeneralEnvironmental quali
36、fication shall demonstrate that equipment will perform its required function during and following a design basis accident, taking into consideration stressors associated with all service conditions. This requires that a method be in place to simulate those stressors that result from normal service a
37、nd accident conditions. The mere presence of an agent or stimulus is not an aging stressor; the stressor must have a demonstrably deleterious effect, given the service conditions and design life of the equipment. Specific stressors may be excluded from programs when it is demonstrated that the stres
38、sor has no impact on the required safety function of the equipment.The different methods of establishing qualification shall meet the following criteria, where applicable:(a) equipment qualification shall not extend beyond the limit of available experimental or operational data;(b) recognized analyt
39、ical and validated experimental models shall be used to predict equipment performance; and(c) simulated conditions shall be as severe as those described in the accident service conditions.Qualification methods include testing, operating experience analysis, or a combination of these methods.5.2 Qual
40、ification documentation5.2.1 GeneralFor qualification of specific nuclear-safety-related equipment, it is recommended that the equipment qualification requirements and a qualification plan be produced and accepted prior to starting the qualification process. The format and control of the document sh
41、all meet the appropriate requirements of the CSA N286 series of Standards.Depending on the selected method of qualification, other documents such as test plans and test reports may be generated by the supplier for acceptance by the purchaser. Requirements related to test plans and test reports are p
42、rovided in Clauses 5.3.4.2 and 5.3.4.3.5.2.2 Equipment qualification requirementsPlant-specific technical specifications for environmental qualification shall include the following, where applicable:(a) details of aging stressors resulting from normal environmental conditions, including temperature,
43、 pressure, radiation, humidity, and any other aging stressor. (b) details of aging stressors resulting from normal operating conditions, including voltage, current, frequency, load, wear, air pressure, inlet and outlet temperature and pressure (for valves), and any other aging stressor;(c) details o
44、f in-plant configuration, including mounting orientation (i.e., horizontal or vertical supports) and electrical, pneumatic, and hydraulic interfaces;(d) a description of control, indication, and other auxiliary devices required for proper operation;(e) functional requirements under the defined norma
45、l and accident service conditions;(f) required qualified life for the equipment or maintenance intervals for specific components, or both;(g) seismic qualification requirements;(h) the required sequence of seismic and harsh environmental condition testing;(i) details of aging stressors resulting fro
46、m accident environmental conditions, including temperature, pressure, radiation, humidity, chemistry, and any other aging stressor;(j) details of aging stressors resulting from accident operating conditions, including voltage, current, frequency, load, operational cycles, air pressure, inlet and out
47、let temperature and pressure (for valves), and other characteristics of operation that impact on the capability of equipment to perform its required safety function;(k) performance requirements and acceptance criteria; and(l) mission time of equipment.(Replaces p. 6, February 2005)6 Canadian Standar
48、ds AssociationEnvironmental qualification of equipment for CANDU nuclear power plantsOctober 20095.7 Ongoing qualificationQualification methods described elsewhere in Clause 5 can yield a qualified life that is less than the installed life of the equipment. When this occurs, an ongoing qualification
49、 program may be implemented. This may be achieved by the use of one or more of the following methods:(a) Aging simulations and testing of identical equipment or components is continued during the qualified life period of the installed equipment.(b) Sample equipment is installed in an environment similar to that in which qualified components are installed. This equipment is removed before th
