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Nuclear Power
Nuclear Grade Stainless Steel: Absolute Safety, Purity, and Traceability
Page Overview
In the nuclear energy sector, safety is not just a requirement—it is the absolute baseline. Tsisco Industrial Ltd. understands that materials used in nuclear reactors must withstand radiation, extreme pressure, and corrosive environments for decades without failure. We provide Nuclear Grade (NG) materials that strictly comply with ASME Section III and RCC-M codes, ensuring 100% traceability from raw material melting to final component delivery.
1. Primary Circuit: Reactor Core Internals & Piping
The Challenge: Materials in the primary loop face the most hostile environment: intense neutron radiation and high-temperature water. This can lead to Radiation Embrittlement and Intergranular Stress Corrosion Cracking (IGSCC), compromising the reactor's integrity.
The Solution:
* Material Purity: We supply Nuclear Grade (NG) Seamless Pipes (P07), specifically modified 304NG and 316L (NG).
* Chemical Control: These alloys feature Controlled Nitrogen (to maintain strength) and strictly Restricted Cobalt content (typically < 0.05% or even lower) to minimize activation and radiation buildup, effectively mitigating IGSCC risks.
Mapped Products:
* [P07] Stainless Seamless Pipe: Nuclear Grade (NG) pipes with restricted Cobalt and Boron levels for primary loop piping.
P07 Stainless Seamless Pipe
Nuclear Grade (NG) pipes with restricted Cobalt and Boron levels for primary loop piping.
2. Secondary Circuit: Steam Generators (SG)
The Challenge: The Steam Generator is the critical heat exchange interface between the radioactive primary loop and the non-radioactive secondary loop. The tubing here is prone to stress corrosion cracking and pitting, which can lead to leaks.
The Solution:
* Superior Corrosion Resistance: Tsisco provides Inconel 690 Heat Exchanger Tubes (P11). Compared to the older Alloy 600, Alloy 690 offers vastly superior resistance to primary water stress corrosion cracking (PWSCC) and intergranular attack, ensuring the long-term reliability of the steam generator.
Mapped Products:
* [P11] Heat Exchanger Tube: High-precision Nickel Alloy (Inconel 690) tubes for steam generators.
P11 Heat Exchanger Tube
High-precision Nickel Alloy (Inconel 690) tubes for steam generators.
3. Containment & Critical Structures
The Challenge: The containment building is the final barrier against radioactive release. It requires structural steel that guarantees impact toughness and leak-tightness under accident scenarios.
The Solution:
* Structural Integrity: We supply extra-wide and heavy-gauge Heavy Plates (P04) used for the steel containment liner (CV liner) and critical structural supports. These plates undergo rigorous impact testing to ensure safety margins are never compromised.
Mapped Products:
* [P04] Heavy Plate: High-strength structural plates for containment liners and pressure vessel shells.
P04 Heavy Plate
High-strength structural plates for containment liners and pressure vessel shells.
Quality Assurance & Certification
* Standards Compliance: All nuclear products are manufactured in strict adherence to ASME Boiler and Pressure Vessel Code Section III (Rules for Construction of Nuclear Facility Components) and the French RCC-M code.
* Traceability: We implement a rigorous quality management system that guarantees 100% traceability. Every pipe, tube, and plate can be traced back to its specific heat number, chemical analysis, and mechanical test results.
