Living Safety Cases for Nuclear Licensees
An ONR SAPs-style risk matrix, live fault-sequence bowtie diagrams, and a tamper-evident audit trail — built for licensees and the assessors who review their safety cases.
Modelled Around ONR's Safety Assessment Principles
The Office for Nuclear Regulation's SAPs framework requires licensees to demonstrate that risks from a nuclear facility are reduced As Low As Reasonably Practicable (ALARP), assessed against defined risk targets and severity/frequency bands. SAFOPS's nuclear project template starts from an ONR SAPs-style matrix — four exposure groups and a Class 1-3 PFD/PFH reliability ladder for safety measures — as a reviewable starting point you adjust to your own facility's specific targets, not a fixed black box. An automated consistency check keeps the template and its example project aligned, so a new project always starts from the reviewed baseline.
Interactive Bowtie Diagrams: Every Fault Sequence Traced to Its Barriers
Initiating events, preventative and mitigative barriers, and consequences are modelled as interactive bowtie diagrams rather than static PDF pages. Hover any barrier to see its zone of influence, spot single points of failure, and open deficiencies directly on the diagram — the same live model your ALARP justification and safety measure schedule are built from. Deficiencies raised on the diagram flow straight into the Deficiencies Schedule, and a barrier shared between fault sequences is recognised once rather than credited twice.
A Tamper-Evident Audit Trail for ONR Inspection
Every edit to the safety case, whether made by an engineer or suggested by the optional AI copilot, is logged in a SHA-256 hash chain. Altering any past entry is immediately detectable — a verifiable record for internal review and regulator inspection alike. For sites that require it, SAFOPS also runs fully on-premise or air-gapped, so nothing has to leave your network. Scrub back through that history with Time Machine, or freeze an approved version as a formal issue.
Software, With Safety Engineers Behind It
You don't have to adopt SAFOPS alone. Our safety engineers can do the work in the platform for you — performing the fault and risk assessments, building and managing the hazard log, and structuring the ALARP justification — from a one-off migration of a legacy paper safety case to ongoing management of the live case between periodic reviews. Use SAFOPS as a tool, a fully managed service, or anything in between.