Nuclear

Nuclear

Engineered sealing systems for the world’s most high-risk power environments. CSD’s advanced sealing solutions deliver certified, long-life protection for nuclear facilities, where safety and compliance are paramount. From new builds and maintenance shutdowns to long-term operations, our systems support nuclear operators with multi-hazard defence at every stage of the asset lifecycle.

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Designed for nuclear demands

With proven resistance to fire, water, gas, smoke and EMP, our sealing technologies help you manage risk, maintain containment integrity, and meet stringent regulatory standards, ensuring peace of mind in the most demanding nuclear environments.

Our Case Studies

Up to 4 hours fire resistance (EI-rated) without additional insulation or coatback

Tested up to 10 bar pressure in wall and floor penetrations

Proven 50+ year durability with no maintenance required

Certified for high temperature and chemical resistance

EMP protection to prevent equipment disruption or data loss

Applications in nuclear facilities

Some of the elements of your nuclear facility that CSD Sealing Systems can protect with our world leading solutions:

Cable and pipe penetrations in reactor containment buildings
Fire-rated ducting, utility corridors and plant rooms
Control rooms and data centre infrastructure
Electrical and instrumentation enclosures
Emergency backup power systems
Flood defence and water ingress mitigation

Multiple cooling towers producing steam in the evening

Key Sealing Solutions

Explore the products designed to help protect the cable and pipe entries, entry points and cable ducts in your nuclear facility.

NOFIRNO Flexible Pipe Penetration Seal

NOFIRNO® Rapid Duct Seal

A fast-install, high-performance sealing system designed for speed-critical or restricted-access environments, offering reliable, water and gastight protection with full re-entry capability.

SLIPSIL Plugs

SLIPSIL® Sealing Plugs

Maintenance-free, tool-less installation for single or trefoil cable and pipe penetrations, providing a gas and watertight seal that remains fully re-enterable without the need for mechanical fixings.

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NOFIRNO® Flexible Pipe Penetration Seals

A versatile, certified system for metallic, GRP and plastic-coated pipes, providing up to four hours’ fire resistance alongside watertight and gastight performance. Flexible and re-enterable, it’s trusted worldwide for its long-term durability and ease of installation.

OFIRNO Flexible Pipe Penetration Seal

NOFIRNO® Plastic Pipe Penetration System

Specifically designed for the unique challenges of plastic pipes, this system provides certified fire and smoke protection while maintaining sealing performance as pipes soften or melt under heat. Ideal for civil, industrial and commercial projects where plastic services are widely used.

NOFIRNO Multi Cable Transits

NOFIRNO® Multi Cable Transits

Certified for up to four hours of fire resistance and pressure-tested for watertight performance, NOFIRNO® offers unmatched versatility for sealing mixed-diameter cables. Durable, re-enterable, and proven worldwide in civil, marine, offshore and industrial applications.

FYLLOFOAM Fire Protection

FYLLOFOAM® Fire Protection

A lightweight, flexible foam-based sealing solution, FYLLOFOAM® provides fire-rated protection for grouped cables while simplifying installation in irregular or hard-to-access spaces.

ACTIFOAM

ACTIFOAM® Fire Protection

Engineered for environments requiring adaptive sealing performance, ACTIFOAM® expands under heat to maintain fire integrity around grouped cables, offering an innovative solution for challenging layouts.

GlandMod Multi-Gland System

GlandMod® Multi-Gland System

A modular gland system that allows multiple cables to pass through a single entry point with individual sealing for each. Designed to reduce installation time while maintaining fire, water and gas protection.

Conduit

Frames and Conduit Systems

Robust steel frames and conduit systems designed to house CSD sealing solutions. Available in multiple configurations to suit round, square or rectangular penetrations, with proven fire and watertight performance.

Let’s protect your facility together

Reach out to discuss tailored sealing strategies for your nuclear project.

Two cooling towers of a nuclear plant producing steam

“The service provided by CSD was excellent. The installation crew were skilled, hard-working and resourceful. The team at CSD also integrated with our own men, supporting them with the external duct sealing.”

CSD client

Offshore