行业组件数据 · 2026

导向套管

A precision guide thimble component for nuclear fuel assembly positioning and alignment in reactor cores.

技术定义与适配语境
典型 导向套管 会按材料、尺寸公差、适配关系和失效风险在 机械和设备制造 中评估。

A cylindrical guide thimble is a critical structural component in nuclear fuel assemblies, designed to maintain precise spacing and alignment between fuel rods while providing channels for control rod insertion and instrumentation. It ensures geometric stability under extreme thermal, hydraulic, and radiation conditions during reactor operation.

组件规格

定义
A cylindrical guide thimble is a critical structural component in nuclear fuel assemblies, designed to maintain precise spacing and alignment between fuel rods while providing channels for control rod insertion and instrumentation. It ensures geometric stability under extreme thermal, hydraulic, and radiation conditions during reactor operation.
工作原理
The guide thimble functions as a rigid tubular guide that maintains fuel rod lattice geometry through mechanical constraint, allowing control rods to move freely within its bore while withstanding axial and lateral loads from coolant flow and thermal expansion.
材料
Zirconium alloy (typically Zircaloy-4 or ZIRLO)austenitic stainless steel (304L316L)or nickel-based alloys (Inconel 718)selected for low neutron absorptioncorrosion resistanceand high-temperature mechanical properties.
Length
4000-5000 mm
Outer Diameter
12.0-15.0 mm
Surface Finish
Ra ≤0.8 μm
Wall Thickness
0.4-0.8 mm
Pressure Rating
15-20 MPa
Operating Temperature
Up to 350°C
Straightness Tolerance
≤0.1 mm/m
标准
ISO 18279ASTM B353RCC-M

行业分类与别名

导向套管 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Inadequate material purity or improper heat treatment->Premature corrosion or cracking->Strict material certification, non-destructive testing (UT, ET), and compliance with nuclear-grade standards.
Excessive vibration or flow-induced oscillation->Fretting wear at spacer grid contact points->Optimized support design, anti-vibration features, and wear-resistant coatings.

工业生态与工程逻辑

0
Stress corrosion cracking
1
Grid-to-rod fretting wear
2
Dimensional deformation under irradiation
3
Hydride embrittlement in zirconium alloys

合规与检测

tolerance
±0.05 mm on critical dimensions, per ASME Y14.5
test method
Dimensional inspection (CMM), hydrostatic pressure testing, eddy current testing for defects, and neutron absorption cross-section verification.

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the primary function of a guide thimble in a fuel assembly?

It maintains precise fuel rod spacing, provides channels for control rods and instrumentation, and ensures structural stability under reactor operating conditions.

Why are zirconium alloys commonly used for guide thimbles?

Zirconium alloys offer low neutron absorption, excellent corrosion resistance in high-temperature water, and good mechanical strength, making them ideal for nuclear applications.

我可以直接联系工厂吗?

CNFX 是开放目录,不是交易平台或采购代理。工厂资料和表单用于帮助你准备直接沟通。

CNFX Industrial Component Index · 机械和设备制造

数据基础

CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。

初步技术归类
本页用于结构化准备研究、RFQ 和供应商评估,不替代买方自己的供应商资质审查、标准核验和技术批准。

请求制造能力信息: 导向套管

说明目标数量、应用场景、交期和关键技术要求,用于准备 RFQ 或供应商评估。

谢谢,信息已发送。
谢谢,信息已收到。

需要制造 导向套管?

对比具备该组件加工或装配能力的制造商资料。

创建制造商档案 联系我们
上一个组件
导向器或保持器
下一个组件
导向孔
URN:CNFX:ME:UNIT:GUIDE_THIMBLE