ICS13.280 CCSF73 BSRS 北京市辐射安全研究会团体标准 T/BSRS098—2023 小型氟盐冷却高温堆总体安全评价方法 Overallsecurityevaluationmethodforsmallfluoridesalt-cooledhigh-temperature reactor （发布稿） 2023-9-13发布 2023-9-13实施 北京市辐射安全研究会  发布 全国团体标准信息平台 全国团体标准信息平台 T/BSRS098—2023 I目次 前言······························································································································II 1范围····························································································································1 2规范性引用文件·············································································································1 3安全目标······················································································································1 4基本安全功能················································································································1 5安全评价······················································································································2 6纵深防御······················································································································2 7总的设计基准················································································································2 状态划分·················································································································2 正常运行·················································································································2 预计运行事件··········································································································2 设计基准事故··········································································································2 设计扩展工况··········································································································3 8外部事件的防护·············································································································3 9事故源项······················································································································3 10应急计划····················································································································3 11安全分析软件的验证·····································································································3 全国团体标准信息平台 T/BSRS098—2023 II前言 本文件按照GB/T1.1－2020《标准化工作导则第1部分：标准化文件的结构和起草规则》的规定 起草。 请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。 本文件为指导性参考方法。 本文件的应用对象为氟盐冷却高温堆（Fluoridesalt-cooledHigh-temperatureReactor,FHR）， FHR使用高温气冷堆中的包覆颗粒作为燃料，FLiBe熔盐作为冷却剂。 本文件由北京市辐射安全研究会提出并归口。 本文件起草单位：生态环境部核与辐射安全中心。 本文件主要起草人：左嘉旭、安婕铷、庄少欣、黄旭阳、宋维、石兴伟、任广益、韩静茹、攸国顺、 胡家驹、张大林、傅瑶。 全国团体标准信息平台 T/BSRS098—2023 1小型氟盐冷却高温堆总体安全评价方法 1范围 本文件规定了小型氟盐冷却高温堆安全评价过程中的总体方法，并且提供了适用于小型 氟盐冷却高温堆的设计和安全分析的指导。 本文件适用于采用固体燃料，氟盐冷却的小型氟盐冷却高温堆设计和运行的安全评价， 也可为小型氟盐冷却高温堆的设计、运营等单位的安全分析及评估提供参考。 2规范性引用文件 下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期 的引用文件，仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本（包括 所有的修改单）适用于本文件。 HAD102-17核动力厂安全评价与验证 HAF201研究堆设计安全规定 HAF202研究堆运行安全规定 HAD202-01研究堆运行管理 小型压水堆核动力厂安全审评原则（试行） 3安全目标 基本安全目标：在小型氟盐冷却高温堆中建立并保持对放射性危害的有效防御，以保 护人员、社会和环境免受危害。 保证在所有运行状态下小型氟盐冷却高温堆的辐射照射或由于其任何计划排放放射性 物质引起的辐射照射保持低于规定限值,且合理可行尽量低，还应采取措施减轻任何事故的 放射性后果。 采取一切合理可行的措施预防小型氟盐冷却高温堆的事故，并且一旦发生事故时减轻 其后果；对于在小型氟盐冷却高温堆设计时考虑过的所有可能事故，包括概率很低的事故， 要以高可信度保证任何放射性后果尽可能小且低于规定限值。保证实际消除可能导致高辐射 剂量或大量放射性释放的事故序列；必须保证发生频率高的事故序列没有或仅有微小的潜在 放射性后果。 小型氟盐冷却高温堆安全设计的基本目标是在技术上实现减轻放射性后果的场外防护 行动是有限的甚至是可以取消的。 4基本安全功能 必须保证在小型氟盐冷却高温堆所有状态下实现以下基本安全功能： 4.1.1控制反应性； 4.1.2排出堆芯余热，导出乏燃料贮存设施所贮存燃料的热量； 4.1.3包容放射性物质、控制放射性的计划排放，以及限制事故的放射性释放。 必须提供对小型氟盐冷却高温堆状态进行监测的手段，以保证实现所要求的安全功能。 全国团体标准信息平台 T/BSRS098—2023 25安全评价 在小型氟盐冷却高温堆的整个设计过程中进行全面的评价，以保证在寿期内的各个阶 段满足全部设计安全要求。设计过程中必须尽早开展安全评价，随着设计和确认性分析的不 断迭代，安全评价的范围和详细程度随着设计的进展不断地扩大和提高。必须将安全评价形 成文件以便于独立评估。 必须保证工作人员和公众在整个寿期内受到的辐射剂量，在运行状态下不超过剂量限 值，在事故工况下不超过可接受限值，并可合理达到的尽量低。在设计阶段，考虑便于放射 性废物管理以及退役和拆除的特性。 安全评价要考虑以下内容：（1）正常运行；（2）预计运行事件；（3）事故工况。在 分析的基础上，确认设计抵御假设始发事件和事故的能力，验证安全重要物项的有效性，以 及确定应急计划的输入。 6纵深防御 纵深防御概念，即保证安全有关的全部活动，包括与组织、人员行为或设计有关的方 面，均置于重叠措施的防御之下，即使有一种故障发生，它将由适当的措施予以探测、补偿 或纠正，以便对由设备故障或人员活动及事件等引起的各种