前言:这是CSA N299的第二版。4，核电厂项目和服务供应的质量保证计划要求，第4类。它取代了2016年出版的前一版。CSA N299系列标准定义了客户和供应商之间合同中规定的为核电厂提供物项和服务的质量保证计划要求。本版本最重要的更新包括a）在第8条中增加了关于奉献的要求。然而，奉献不适用于第4类；b） 增加附件C，以提供关于假冒、欺诈和可疑物品（CFSI）的指导；c） 增加附录D，为风险评估提供指导；和d）增加附录E，以提供记录指南。 为了更好的可读性，本标准也进行了重组和重新排序。提醒本标准用户，加拿大民用核设施应遵守《核安全与控制法案》及其法规的规定。范围:1.11.1.1本标准规定了供应商的最低要求？为核电厂提供物项和服务的美国质量保证计划（以下简称“质量保证计划”）第4类。注:1）本标准不包括单独的实施指南；相反，相关指南在整个标准中以注释的形式出现，或在相关附件中出现（见附件B至E）。2）本标准中的要求没有限制或规定供应商？项目应采取措施；他们也没有具体说明如何建立这样的项目。 这些要求只规定了这些计划涵盖的内容；它们允许供应商决定如何组织他们的计划，以适应他们自己的情况和目标。供应商有责任以一致和系统的方式制定计划，允许客户、公认的资格认证机构或监管机构调查和审计计划。3） 本标准可为核电站以外的核设施提供指导。这些设施的操作员可确定本标准的适用性和适用性。1.1.2质量保证计划的主要目的是（a）将不合格项与合格项进行分类；和b）达到要求，然后证明已满足要求。1.2本标准适用于客户指定的供应商和子供应商。 注:如果满足本标准的要求，可以使用其他质量保证计划标准或管理体系标准。1.3在本标准中，“应”用于表示要求，即用户为遵守本标准而有义务满足的规定；“应该”用于表示建议或建议但不需要的建议；“可”用于表示一个选项或在标准范围内允许的选项。注释随附条款不包括要求或替代要求；随附条款的注释的目的是将解释性或信息性材料与文本分开。表和图的注释被视为表或图的一部分，可以作为要求编写。附件被指定为规范性（强制性）或信息性（非强制性）- 必须）定义其应用程序。

Preface:This is the second edition of CSA N299.4,Quality assurance program requirements for the supply of items and services for nuclear power plants, Category 4. It supersedes the previous edition published in 2016.The CSA N299 series of Standards defines quality assurance program requirements for the provision of items and services for nuclear power plants when specified in the contract between the customer and the supplier.The most significant updates to this edition includea) the addition of requirements on dedication in Clause 8. However, dedication is not applicable to Category 4;b) the addition of Annex C to provide guidance on counterfeit, fraudulent, and suspect items (CFSIs);c) the addition of Annex D to provide guidance on risk evaluation; andd) the addition of Annex E to provide guidance on records.This Standard has also been restructured and reordered for better readability.Users of this Standard are reminded that civilian nuclear facilities in Canada are subject to the provisions of theNuclear Safety and Control Actand itsRegulations.Scope:1.11.1.1This Standard defines minimum requirements for a supplier?s quality assurance program (hereafter referred to as "QA program") for the supply of items and services to nuclear power plants — Category 4.Notes:1) This Standard does not include a separate implementation guide; instead, relevant guidance is found throughout the Standard as notes, or within the relevant annex (see Annexes B through E).2) The requirements in this Standard do not restrict or specify the form that suppliers? programs should take; nor do they specify how to establish such programs. The requirements only specify what these programs cover; they allow suppliers to determine how their programs should be structured in order to suit their own situations and objectives. The onus is on suppliers to develop programs in a consistent and systematic way that allows customers, recognized qualifying authorities, or regulatory authorities to survey and audit the programs.3) This Standard may provide guidance for nuclear facilities other than nuclear power plants. The operators of these facilities may determine the applicability and suitability of this Standard.1.1.2The QA program is aimed primarily ata) sorting nonconforming items from conforming items; andb) achieving the requirements and then demonstrating that they have been met.1.2This Standard applies to suppliers and subsuppliers when specified by the customer.Note: Other QA program standards or management system standards may be used provided that the requirements of this Standard are met.1.3In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the Standard. 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 considered 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.