SNF MODULE
Modular System for Long-Term Dry Storage of Spent Nuclear Fuel
SNF MODULE is a modular system of specialized equipment for handling, transportation, and decentralized long-term dry storage of spent nuclear fuel (SNF) from classical nuclear reactors, including VVER, as well as small modular reactors (SMRs).
The system is designed as a universal, scalable, and regulation-ready solution, fully compatible with modern nuclear safety requirements and adapted for deployment in high-risk and post-war environments.
SNF MODULE is developed within the TRIUMPH / SYNERGOATOM technological framework as part of a broader nuclear infrastructure and energy stability architecture.
Purpose and Strategic Role
The SNF MODULE addresses one of the most critical and sensitive challenges of nuclear energy systems: safe, long-term management of spent nuclear fuel outside centralized storage paradigms.
The module is intended to:
- Enable decentralized SNF storage at nuclear sites
- Support safe transport and interim storage of spent fuel
- Reduce dependency on single centralized facilities
- Increase resilience of nuclear infrastructure
- Integrate seamlessly with SMR deployment strategies
This approach is particularly relevant for:
System Concept
SNF MODULE is conceived as a fully integrated modular system, combining storage, handling, and transportation functions within a unified design philosophy.
The system includes:
Protective Concrete Overpack
A high-strength protective structure manufactured using IBIPC concrete, providing:
- Gamma and neutron radiation shielding
- Resistance to external mechanical impacts
- Structural stability under extreme conditions
- Long-term durability for extended storage periods
MPC and Fuel Basket
An internal canister and fuel basket system designed for:
- Secure positioning of fuel assemblies
- Accommodation of intact and damaged fuel
- Neutron absorption using Allobor-5 alloy
- Compatibility with various reactor fuel geometries
Transfer and Handling Systems
Specialized equipment enabling:
- Safe loading and unloading of spent fuel
- Controlled transfer operations
- Minimized personnel exposure
- Compatibility with existing nuclear site infrastructure
Transport Overpack
A dedicated transport configuration allowing:
- Safe movement of SNF between sites
- Compliance with transport safety requirements
- Passive thermal management during transport
- Protection against environmental and mechanical hazards
Design Principles
SNF MODULE is built on the same core principles as the TRIUMPH nuclear portfolio:
Safety by Design
Multi-barrier containment, passive safety features, and conservative engineering assumptions.
Modularity
Scalable architecture suitable for single-site deployment or fleet-level implementation.
Material Innovation
Use of advanced materials optimized for radiation shielding, neutron absorption, and long-term stability.
Passive Systems
No reliance on active cooling or complex operational support systems.
Regulatory Compatibility
Designed from the outset to align with international nuclear storage and transport standards.
Compatibility and Applicability
SNF MODULE is designed to support:
- VVER reactor fuel
- PWR-type fuel assemblies
- SMR fuel formats
- Mixed fuel inventories
- Intact and damaged fuel conditions
The system is suitable for deployment at:
- Nuclear power plant sites
- SMR clusters
- Research and prototype facilities
- Controlled industrial nuclear zones
- Post-decommissioning locations
Project Scope
The project covers the full lifecycle of the system, including:
- Conceptual and detailed engineering design
- Prototyping and material validation
- Structural, thermal, and radiological testing
- Certification and regulatory preparation
- Production readiness and initial deployment
- Personnel training and operational support
SNF MODULE is developed as an industrial-grade solution, not an experimental concept.
Development Phases
The project follows a structured, multi-phase development path:
Conceptual Design
Definition of system architecture, materials, and functional principles.
Detailed Engineering
Advanced simulations of structural, thermal, and radiological behavior, including material testing.
Prototype Development
Manufacturing and testing of a full-scale prototype under controlled conditions.
Certification and Regulatory Preparation
Comprehensive testing, safety validation, and preparation of regulatory documentation.
Production and Deployment
Establishment of serial manufacturing and deployment at selected nuclear sites.
Key Engineering Challenges and Solutions
Structural and Seismic Stability
Addressed through reinforced concrete design, structural testing, and conservative load assumptions.
Passive Thermal Management
Achieved via optimized heat dissipation paths and natural convection cooling.
Multi-Use Certification
Early integration of regulatory requirements for both storage and transport applications.
Role within the TRIUMPH Ecosystem
SNF MODULE is a core element of TRIUMPH's integrated nuclear infrastructure strategy, supporting:
- SMR deployment
- Backend fuel cycle resilience
- Nuclear energy security
- Long-term environmental safety
- Decentralized nuclear architectures
It complements reactor projects such as MRIA SMR, forming a complete lifecycle approach to nuclear energy systems.
Confidentiality and Further Engagement
Detailed technical specifications, safety analyses, implementation scenarios, and all economic or financial parameters of the SNF MODULE project are not disclosed publicly.
Comprehensive information may be provided exclusively to qualified and interested stakeholders within the framework of confidential consultations and non-disclosure agreements (NDA).
