INDUSTRY COMPONENT

Core Support Structure

Core Support Structure is a critical load-bearing component in reactor cores that maintains structural integrity under extreme thermal and mechanical stresses.

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Component Specifications

Definition
The Core Support Structure is an engineered assembly designed to securely position and support reactor core components including fuel assemblies, control rods, and instrumentation. It provides precise alignment, distributes mechanical loads, accommodates thermal expansion, and ensures safe operation under high-temperature, high-pressure, and radiation conditions. This structure typically consists of grids, plates, beams, and fastening systems that maintain dimensional stability throughout operational cycles.
Working Principle
The Core Support Structure operates on principles of mechanical load distribution, thermal stress management, and vibration damping. It transfers weight and operational forces to the reactor vessel while allowing controlled thermal expansion through engineered gaps and flexible connections. The structure maintains alignment through precision-machined interfaces and resists deformation via optimized cross-sectional geometry and material selection.
Materials
High-temperature alloys such as Inconel 718, Hastelloy X, or 316L stainless steel; often with neutron-absorbing coatings; minimum yield strength: 550 MPa at 400°C; thermal conductivity: 15-25 W/m·K.
Technical Parameters
  • Load Capacity ≥500 kN vertical, ≥200 kN lateral
  • Surface Finish Ra ≤ 1.6 μm on mating surfaces
  • Natural Frequency >30 Hz to avoid resonance
  • Radiation Resistance ≥10⁸ Gy total dose
  • Dimensional Tolerance ±0.1 mm on critical interfaces
  • Operating Temperature -50°C to 650°C
Standards
ISO 9001, ASME BPVC Section III, RCC-M, DIN 25413

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Core Support Structure.

reactor core support structure nuclear component load-bearing assembly high-temperature alloy structural integrity thermal stress management Core Support Structure Core Support Structure in Chemical Manufacturing

Parent Products

This component is used in the following industrial products

Reactor Core

The central component of an industrial reactor where the primary chemical or nuclear reactions occur

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Engineering Analysis

Risks & Mitigation
  • Stress corrosion cracking
  • Thermal fatigue failure
  • Radiation-induced embrittlement
  • Vibration-induced loosening
  • Creep deformation at elevated temperatures
FMEA Triads
Trigger: Cyclic thermal stresses exceeding material endurance limit
Failure: Fatigue cracking at weld joints or stress concentration points
Mitigation: Implement finite element analysis during design to optimize geometry, use post-weld heat treatment, apply compressive residual stresses via shot peening
Trigger: Neutron irradiation altering material microstructure
Failure: Reduced fracture toughness and increased brittleness
Mitigation: Select radiation-resistant alloys, incorporate neutron-absorbing shields, establish regular material surveillance programs

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Dimensional tolerances per ASME Y14.5, flatness within 0.05 mm/m, parallelism within 0.1 mm over full length
Test Method
Ultrasonic testing per ASTM E797, liquid penetrant inspection per ASTM E165, dimensional verification with coordinate measuring machines, load testing to 150% design load

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the primary function of a Core Support Structure?

The primary function is to maintain precise positioning and structural integrity of reactor core components while distributing mechanical loads and accommodating thermal expansion under extreme operating conditions.

How often should Core Support Structures be inspected?

Visual and dimensional inspections should occur during every refueling outage (typically 18-24 months), with non-destructive testing (ultrasonic, eddy current) recommended every 5-10 years depending on operating history and material conditions.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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