Seismic Analysis

Services have been provided for eDf Energy at Heysham 1 and 2, Sizewell, Torness and Hartlepool Power Stations and at Wylfa and Hunterston A Power Stations for Magnox. We have completed a number of high QA Grade projects involving Seismic Qualification of new and existing structures involving complex 3D dynamic modelling using Finite Element Analysis (FEA).

Seismic Analysis is undertaken in accordance with ASCE: 4-98; Seismic Analysis of Safety Related Nuclear Structures
Where required structures are designed for Seismic Loading Conditions encountered during a 1 x 10-4 event (earthquake)
Analysis is done via the SRSS Combination method using Response Spectra Graphs.


  • Seismic Analysis using the SRSS method for given response spectra graphs is undertaken using STAAD Pro finite element software
  • Existing structures are checked in accordance with appropriate design codes and with due consideration to the age of the structure. This may include where necessary retrospective assessment to historical or obsolete codes of practice
  • Finite element analysis is also used when designing/checking plate elements and reinforced concrete structures


Is the largest UK earthquake measured at Doggers Bank in 1931

A message from Thomas Consulting
Here at Thomas Consulting as other organisations during this time of uncertainty with COVID-19 we are responding to the Government recommendations to try and reduce the spread of the virus. Staff have been made aware of the steps that need to be taken if they show any signs of the infection or have been in contact with others with the symptoms and are updated with any changes daily. That said we are focused on delivering safe, reliable on-going support to both new and existing clients; having implemented measures to ensure that we are able to have staff working remotely (i.e. at home) reducing their contact both with each other and clients to keep all as safe as is possible.

Unfortunately site meetings are postponed until the current restrictions are reviewed and updated and each meeting/site visit will be assessed individually at that time. All other elements of each project will continue to be progressed where possible and each member of the team will be updating clients on their progress.

Thomas Consulting are committed to continue to review the Governments recommendations and make the necessary changes that enable our projects to be delivered on time collaboratively during this period with the minimum amount of risk.

Unfortunately this is going to be an ongoing process for the next few months with constant review; however should you need to contact any member of our team the following numbers will always be available during our normal working hours of 9am - 5pm Monday - Friday 01743 237940 (Shrewsbury), 01772 299040 (Chorley) and 01524 846022 (Lancaster).