Office for Nuclear Regulation
An agency of HSE

Key milestones

December 2011
ONR publishes Step 4 summary, assessment and other reports which set out its findings and conclusions of the assessment. ONR also issues an interim DAC for the EDF and AREVA UK EPR™ reactor and the Westinghouse AP1000® reactor.
October-November 2011
Requesting Parties submit resolution plans for the Fukushima lessons learnt GDA Issue.
October 2011
HSE and the Environment Agency publish their third quarterly report for 2011 (July-September). HM Chief Inspector of Nuclear Installation publishes his final report on the lessons learnt from Fukushima accident in Japan.
July 2011
HSE and the Environment Agency publish their second quarterly report for 2011 (April-June), identifying and listing the GDA Issues, which are also published on the GDA website. The Requesting Parties, resolutions plans, with the exception of the resolution plan for identifying and applying the lessons learnt from the Fukushima accident, are also published.
May 2011
HM Chief Inspector of Nuclear Installations publishes his interim report on the lessons learnt from the Fukushima accident in Japan.
 
May 2010
Environment Agency will begin a public consultation, running until September 2010, to help inform its decision on the designs.
April 2010
HSE and the Environment Agency publish their first Quarterly Report for 2010 (January-March). This provides an update on their work to assess new nuclear power station designs.
February 2010
HSE and the Environment Agency publish their fourth Quarterly Report for 2009 (October-December). This provides an update on their work to assess new nuclear power station designs.
November 2009
HSE published Step 3 reports. The detailed Step 4 assessment begins.
October 2009
HSE and the Environment Agency publish their third Quarterly Report for 2009 (July-September) today. This provides an update on their work to assess new nuclear power station designs.
July 2009
HSE and the Environment Agency, publish their second Quarterly Report (April -June 2009). This provides an update on their work to assess new nuclear power station designs.
May 2009
HSE and the Environment Agency publish their first Quarterly Report (Jan-March 2009), which provides an update on their assessment work. This is the first of a series of regular updates to be produced.
September 2008
GE-Hitachi requested a temporary suspension from GDA. As a result, both regulators suspend assessment work on the ESBWR.
June 2008
HSE and the Environment Agency announce that they are starting the next, more detailed stage of the assessment process for the remaining three designs (Step 3).
April 2008
Atomic Energy of Canada Ltd (AECL) announces that it is withdrawing its ACR 1000 design from the assessment process.
March 2008
HSE and the Environment Agency announce that their initial assessment of four new nuclear power stations designs found no shortfalls at this stage.
September 2007
Initial assessment of the designs begins (Step 2).
August 2007
GDA process launched (Step 1).
July 2007
Four companies make valid applications for GDA.
  • AREVA and Electricité de France's (EDF) UK EPR
  • Westinghouse Electric Company's AP1000
  • GE-Hitachi Nuclear Energy's ESBWR
  • Atomic Energy of Canada Limited's (AECL) ACR-1000
Jan 2007
HSE and EA publish guidance on the GDA process.
Updated 25.07.12