Small Modular Reactors (SMRs) are transforming nuclear energy by offering greater flexibility and efficiency. As these reactors embrace advanced digital systems, they open new opportunities to enhance safety and reliability. With digitalization, SMRs can benefit from innovative technologies that support secure and resilient operations. Cybersecurity plays a vital role, not just as an IT consideration, but as an essential part of nuclear safety and the protection of modern facilities and critical infrastructure. By proactively strengthening cybersecurity measures, SMR operators can confidently manage evolving digital environments and maintain the highest standards of safety and trust.
This article explores why SMRs require robust cybersecurity, how the NIST Cybersecurity Framework (CSF) supports nuclear safety and security, and how these principles align with standards like CSA N290.7. Finally, we’ll show how Alithya helps operators build resilience through integrated cybersecurity programs tailored to nuclear environments.
Ensuring safe and secure SMR operations with robust cybersecurity practices
SMRs operate in environments where safety and reliability are non-negotiable. Digitalization introduces vulnerabilities that can undermine nuclear safety. As these systems become more connected, SMRs face a growing need to manage cyber threats that can affect both operational performance and nuclear security.
- Operational technology (OT) risks: Control systems are no longer "air gapped" and are more interconnected, possibly increasing their exposure.
- Supply chain complexity: Third-party software and hardware can introduce hidden threats.
- Regulatory requirements: Nuclear safety and security regulations demand rigorous cyber readiness.
Even isolated cyber incidents can impact reactor safety systems, emphasizing why cybersecurity is a key part of nuclear safety.
How the NIST cybersecurity framework strengthens nuclear cybersecurity for SMRs
The NIST cybersecurity framework is a proven model for managing cyber risk across critical infrastructure sectors, including nuclear facilities. Its latest version, CSF 2.0, adds a govern function to strengthen leadership accountability, which is essential for nuclear safety governance. For SMRs adopting increasingly digital control systems, NIST CSF provides a structured approach to defending against cyber threats that could impact reactor safety and operational resilience.
Six functions applied to SMRs
- Govern: Embed cybersecurity into nuclear safety culture; assign executive responsibility.
- Identify: Recognize critical OT/IT assets and vulnerabilities impacting nuclear security.
- Protect: Implement safeguards like network segmentation and system hardening controls to protect reactor systems.
- Detect: Monitor for anomalies that could compromise nuclear safety.
- Respond: Define clear escalation paths for cyber incidents affecting reactor operations.
- Recover: Ensure rapid restoration of safety-critical systems after an attack.
Aligning NIST cybersecurity guidance with nuclear safety standards
Standards like CSA N290.7 complement NIST CSF by focusing on nuclear-specific requirements. Together, these frameworks create a structured approach that strengthens nuclear cybersecurity across critical infrastructure and supports consistent protection of reactor control systems.
- Defense-in-depth: Multiple layers of protection for reactor safety systems.
- Lifecycle security: Cybersecurity integrated from design to decommissioning.
- Vendor assurance: Secure supply chain to maintain nuclear safety and security.
Mapping NIST CSF functions to CSA N290.7 ensures compliance and resilience.
Practical actions to strengthen nuclear cybersecurity for SMR operators
To strengthen nuclear safety and security, SMR operators must adopt a structured approach that aligns cybersecurity activities with nuclear regulatory expectations. These measures help protect critical infrastructure, reduce exposure to cyber threats, and ensure the resilience of reactor control systems across modern nuclear facilities.
- Conduct gap analysis: Compare current practices against NIST CSF and CSA N290.7.
- Perform risk assessments: Identify and prioritize systems important to nuclear safety and security.
- Segment networks: Isolate OT from IT to protect reactor controls.
- Implement countermeasures: Protect systems from the attack pathways identified in risk assessments
- Train staff: Build cybersecurity awareness into nuclear safety protocols.
- Test incident response: Simulate cyber events impacting reactor safety.
- Maintain and audit: Validate and verify the cyber security governance and controls are working as expected.
- Engage vendors: Validate supplier cybersecurity posture.
Evolving cyber threats affecting nuclear safety
To maintain robust nuclear security, SMR operators should stay informed about the evolving cyber risk landscape. Examples of current risks include:
- Ransomware attacks: Targeting OT systems to disrupt reactor operations.
- Supply chain compromise: Malicious code in third-party components.
- AI-driven threats: Automated attacks exploiting nuclear system vulnerabilities.
Continuous monitoring and proactive defense are essential for nuclear safety.
Why Alithya is your trusted partner in nuclear safety, cybersecurity, and software qualification
Alithya brings deep expertise in nuclear safety and security, helping SMR operators and nuclear facilities navigate complex regulatory and technical challenges. Our mission: safeguard nuclear safety while enabling innovation.
What we deliver
- Cybersecurity assessments: Identify gaps that could impact nuclear security.
- NIST & CSA compliance: Align governance, technology, and processes for reactor safety.
- Secure digital transformation: Establish secure architectures without compromising nuclear safety.
- Software qualification expertise: Proven track record qualifying hundreds of safety-critical components under standards like CSA N290.14 and IEC 61508.
- Ongoing support: From incident response planning to compliance audits.
Our advantage
- Right people: Experts in nuclear software, cybersecurity, and regulatory standards.
- Right process: Structured, independent methodology for risk mitigation and compliance.
- Right technology: A qualified engineering lab for verification, validation, and qualification.
When it comes to reducing risks in nuclear safety systems, there’s no room for error. Alithya ensures your systems are safe, reliable, and compliant so you can focus on innovation with confidence.
Ready to strengthen your SMR cybersecurity and nuclear safety posture?
Contact us today to integrate NIST best practices and meet nuclear regulatory requirements.