State-of-the-art PRA

Jacobsen Analytics Ltd is a small consultancy organisation located in the UK, operating from three offices across the country, in London, Liverpool and Cheshire. We have state-of-the-art expertise in Probabilistic Risk Assessment, which is our specialist area. Our clients are largely in the nuclear sector.


We are able to perform all the major tasks required for performance and maintenance of Probabilistic Risk Assessments - for example: Fault Tree and Event Tree analysis, data analysis and Bayesian analysis, Human reliability analysis, Monte-Carlo simulation and uncertainty analysis, Internal and external hazard analysis, Severe accident analysis and Level 2 PRA/PSA, Fire propagation simulation, Risk Monitor software and implementation.


We have a Global client base, which includes NPP vendors such as Areva NP Inc and Hitachi GE, NPP operators such as EDF Energy, First Energy and EPZ, regulators such as the UK Office for Nuclear Regulation, and industry research bodies such as EPRI in the USA and CRIEPI in Japan.

Latest updates

You can find case studies of recent projects on the Examples of our work page and more detailed presentations and reports on the Downloads and links page. You will also find a link to a Python implementation of a simple fire risk model (the link goes to a Google's Collaboratory worksheet). We would be interested in any feedback you have on that model!

Jacobsen have developed software called JSEISMIC to support seismic risk assessments and also a new database tool called JAFFdb which is now available for clients to purchase in order to manage Fire and Flood PSA data and scenario development. More information about these tools can be found on the software page.

Last updated: 8 September 2020
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