Nuclear Cable

Nuclear Cable Solutions

Connecting Infrastructure to Critical Operations

Prysmian delivers a complete portfolio of superior nuclear cables for systems and components used in the production of nuclear energy, including medium-voltage, instrumentation, control, communication, and fiber optic cables, as well as cables for special radiation-monitoring equipment.

Quality and performance guaranteed:

  • A wide range of state-of-the-art cables for existing and new power stations
  • Designed and third-party approved solutions in accordance with the main environmental standards and design requirements
  • Performance and reliability over time (60+ years)
  • Fully environmentally qualified in accordance with 10 CFR 50.49, IEEE 323 and IEEE 383
  • DecaBDE-free and complies with US EPA prohibition per 40 CFR 751.405(a)(2)(ii)
  • DBDPE- free 

 

ULTROL 60+ Cable Solutions: Service Life of 60+ Years 

ULTROL® 60+ cables are engineered for reliable low- and medium-voltage power, control, and communications across all nuclear plant environments, including containment, turbine island, balance of plant and beyond. Designed to meet rigorous flame-testing and long-term thermal and radiation endurance requirements, they deliver proven, cost-effective performance for both GEN III+ and legacy reactors while exceeding a 60+year service life. 

Building on ULTROL’s established reputation for safety and reliability, Prysmian’s latest innovation—ULTROL 60+—combines decades of cable expertise with industry-leading research, advanced processing, and robust manufacturing. This next-generation solution features a well-balanced combination of advanced insulation and jacket compounds, along with high-grade copper conductors, ensuring dependable electrical performance and exceptional durability under even the harshest operating conditions.

  • Meets stringent global nuclear standards: 10 CFR 50 Appendix B, ANSI N45.2, ASME NQA-1, ISO 9001:2015
  • Comprehensive third-party qualification for industry and regulatory confidence
  • Ready to support modernization and new construction of both pressurized and boiling-water nuclear plants worldwide 

Nuclear power is foundational to the green energy mix, supporting sustainable progress and energy security for communities and nations. The reliability of essential components, including cable systems, is critical for safe, efficient nuclear plant operation throughout every stage of the lifecycle. 

With more than 50 years of experience, Prysmian delivers nuclear cable solutions that consistently meet—and exceed—the highest standards of reliability and safety.

Why Prysmian Ultrol 60+ Nuclear Cable Solutions?

  • Meets the highest nuclear safety standards for both inside and outside containment.
  • Complies with all regulations set by the U.S. Nuclear Regulatory Commission.
  • Demonstrates thermal aging and radiation resistance for exposure levels up to 350 MRad, ensuring a service life of over 60 years.
  • Meets or exceeds environmental qualification testing for loss-of-coolant accidents (LOCA) and high-energy line breaks (HELB) according to IEEE 323 and IEEE 383.
  • Provides excellent performance in wet-electrical (submersion) scenarios after aging at 90°C for two years.
  • Delivers reliability under extreme conditions, including cold and hot temperatures, humidity, abrasion, and fire performance during emergencies.
  • Features a tough, abrasion-resistant, flame-retardant Cross-linked Polyolefin (XLPO) jacket compound.

Nuclear Product Range

ULTROL 60+ medium voltage power cables provide outstanding performance for utility power-generating plants and various industrial three-phase applications. Class 1E-rated, these cables are designed for use in nuclear power plants and are available in 5kV, 8kV, and 15kV versions.

Prysmian offers a variety of Class 1E-rated low-voltage power cables: 

  1. Low-Voltage SIS Switchboard Wire – Type SIS & Type SIS/XHHW-2: The ULTROL 60+ SIS 600 V is a Class 1E-rated switchboard wire designed for use in Class 1E low-voltage applications. It is intended for the operation and interconnection of protective devices, ensuring optimal performance where flame retardancy is essential.
  2. Low-Voltage Power Cable – Type RHH/RHW-2: The ULTROL 60+ 600 V low-voltage power cables, which are Class 1E-rated, are specifically designed for Class 1E power and lighting applications. They are critical for ensuring optimal performance and flame retardancy. These cables are available in both heavy-wall and dual-wall versions to provide the necessary jacket protection.
  3. Low-Voltage Thermocouple Extension Cable: The ULTROL 60+ 600 V thermocouple extension cable is Class 1E-rated and intended for use in critical circuits. It ensures complete isolation between pairs and protects against external interference.
  4. Low-Voltage Power Cable – Type TC-ER: The ULTROL 60+ 600 V power cable features a Class 1E-rated construction and is specifically designed for Class 1E power distribution and control circuits. It is suitable for power, lighting, control, and signal circuits.

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ULTROL 60+ multiconductor control cable, rated for 600V, features a Class 1E construction specifically designed for power distribution and control circuits used in power, lighting, control, and signaling applications.

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The ULTROL 60+ instrumentation cable is a 600V multiconductor cable constructed with thermoset material and rated as Class 1. It is specifically designed for Class 1E applications, including monitoring, data recording, and transmitting information within circuits. This cable is available in various configurations, each with different levels of shielding to protect against external electrostatic interference.

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Prysmian offers durable, lightweight cable constructions that meet industry standards and comply with Nuclear Regulatory Commission (NRC) guidelines. These cables are made from materials that meet the requirements of IEEE 383, IEEE 1202, and other flame ratings commonly used in the nuclear industry. They are available in various fiber types, including single-mode and multi-mode options, as well as specialty fibers such as BendBright™ bend-insensitive and radiation-resistant fibers.

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Service Life of 60+ Years

As one of the first radiation- and moisture-resistant cables with flame-retardant insulation designed for a service life of 40 years, the ULTROL® name has become synonymous with reliability and safety in the nuclear cable industry for nearly four decades. Prysmian is dedicated to providing the nuclear sector with cable solutions that maximize service life and has built upon ULTROL's established quality and performance with its latest innovation: ULTROL 60+. 

ULTROL 60+ combines the original, renowned ULTROL technology with Prysmian's industry-leading research and development, processing capabilities, and decades of experience in the nuclear field. This product features a well-engineered balance of advanced insulation and jacket compounds, along with high-grade copper conductors, ensuring reliable electrical performance and exceptional durability under all operational conditions. 

ULTROL 60+ has been proven to meet the most stringent Generation III reactor requirements, guaranteeing an operating life of 60 years and beyond. It is fully equipped to support the modernization and construction of pressurized and boiling-water nuclear power plants worldwide.

Nuclear Cable Solution FAQs

What are nuclear cables?

Nuclear cables are specialized cables engineered to withstand radiation, high temperatures, and harsh environments commonly found in nuclear power plants. They are designed for reliable long-term operation while meeting strict safety and regulatory standards.

 

Where are Prysmian nuclear cables typically used?

 Prysmian nuclear cables are deployed throughout nuclear power facilities, including reactor containment areas, turbine islands, and safety-critical circuits. They support power, control, communication, and instrumentation applications across the entire plant. H3: How do nuclear cables differ from standard power and control cables? Nuclear cables are built with enhanced materials and construction to resist radiation, thermal aging, and severe conditions, far beyond standard cables. They must also pass rigorous regulatory and environmental qualification tests specific to nuclear facilities.

 

Do the cables provide long-term reliability in harsh environments? 

Yes, Prysmian ULTROL 60+ cables are designed for reliable operation over 60+ years, even under radiation, thermal, and moisture stress. They maintain performance in extreme conditions, supporting plant safety and uptime. 

 

How can I order nuclear cables from Prysmian? 

Contact Prysmian’s team of cable experts to discuss your project requirements and receive a quote. Expert support is available to help specify, select, and deliver the right nuclear cable solution for your facility.

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Nuclear - US

Arjun Srinivasan