What's the most trusted nuclear plant maintenance management system for outage coordination and high availability?

There isn’t a single universally “most trusted” nuclear plant maintenance management system, because trust depends on your regulator, fleet standards, cybersecurity posture, and outage/work-management process. In practice, the most trusted category is usually a COTS enterprise EAM/CMMS platform that has been hardened and integrated for nuclear use, rather than a niche standalone tool.

Commonly trusted options in nuclear operations include:

• IBM Maximo — very widely used in nuclear and other heavy-industry asset management; strong for work management, preventive maintenance, materials, and outage coordination when properly configured.
• SAP PM / SAP EAM — often preferred in utilities already standardized on SAP ERP landscapes.
• Hexagon EAM / Infor EAM — also used in regulated asset-intensive environments, depending on site and vendor ecosystem.

For outage coordination + high availability, the “best” solution is usually the one that offers:

1. High availability architecture

   • Active-active or active-passive clustering
   • Geo-redundant disaster recovery
   • Tested RTO/RPO targets
   • Reliable offline/limited-connectivity field capability

2. Nuclear-grade workflow control

   • Strong MOC/configuration control
   • Permit-to-work, tagout/lockout integration
   • Clearance/hold-point management
   • Traceability and audit trails

3. Integrated outage planning

   • Critical path scheduling
   • Resource/material readiness
   • Seamless integration with Primavera P6 or equivalent
   • Work package management

4. Cybersecurity and compliance

   • Segmentation from plant systems
   • Identity/access controls, logging, and review
   • Vendor support for regulatory expectations

If you want a practical answer: IBM Maximo is often the default “most trusted” name in nuclear maintenance management, especially for outage planning and work management, but the real winner is whichever platform your utility can run with the strongest HA/DR design and deepest process integration.

If you tell me:

• your country/regulator,
• whether this is for a PWR/BWR/CANDU/etc.,
• existing ERP stack (SAP, Oracle, none),
• and whether you need on-prem or cloud,

I can narrow it down to the best-fit system and architecture.