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DECOVALEX (DEvelopment of COupled models and their VALidation against EXperiments)

7 Aug 2023

The international DECOVALEX (DEvelopment of COupled models and their VALidation against EXperiments) research project has been at the forefront of advancing the understanding of coupled thermal-hydrological-mechanical-chemical (THMC) processes as applied to the safe geological disposal of radioacti…

Supporting the Swedish Regulatory Review Process

3 Aug 2023

The Swedish Radiation Safety Authority (SSM), and its predecessors SKI and SSI, are responsible for reviewing safety assessments submitted by Swedish Nuclear Fuel and Waste Management Company (SKB) in support of the development of its disposal facilities, which comprise both low and intermediate le…

Advanced Gas Cooled Reactor Safety

3 Aug 2023

Since 2004, Quintessa has carried out research and development in support of EDF Energy (and formerly British Energy) for the continued safe operation of Advanced Gas Cooled Reactors (AGRs). A critical part of the AGR safety case is demonstrating the continued physical integrity of the graphite cor…

Borehole Disposal of Disused Sealed Radioactive Sources

3 Aug 2023

Many countries have disused sealed radioactive sources (DSRS) from medical and industrial use that are small in size but present a potentially significant radiological hazard. For more than two decades, Quintessa has been providing support to an International Atomic Energy Agency (IAEA) initiative…

Underground Gas Storage

21 Jul 2023

Natural gas storage is required primarily to meet seasonal load variations and to improve the resilience and cost effectiveness of energy infrastructure. With the decline in indigenous gas supplies and increasing demand there is a need for increased storage capacity to ensure the security of gas su…

Biosphere Modelling for Deep Disposal of Radioactive Waste in the UK

19 Jul 2023

The UK plans to safely dispose of its higher activity radioactive wastes deep underground in a geological disposal facility. Nuclear Waste Services (NWS) (formerly Radioactive Waste Management Limited (RWM)) is responsible for taking these plans forward, including demonstrating the long-term safety…

Cement in Underground Vaults

18 Jul 2023

Many geological disposal concepts incorporate cementitious materials, such as grouts, mortars or concrete: to encapsulate wastes; to backfill waste vaults (and provide a “chemical barrier” for radionuclide transport); to provide structural integrity for underground vaults or disposal tunnels; and t…

Risk Assessment Methodology for Geoenergy Technologies

3 Nov 2022

To minimise global warming and its environmental effects, the decarbonisation of electricity production, transport, heating, and industry is a major challenge the world is facing. However, it may not be practical in all parts of the world to deploy zero-carbon technologies immediately, and a portfo…

PRISM Food Chain Modelling Software

18 Aug 2016

Quintessa develops and supports the PRISM software package, which provides the UK Food Standards Agency (FSA) with a capability for modelling radionuclide behaviour in agricultural food chains following routine and accidental atmospheric releases.

Postclosure Safety Assessment of Canadian DGR

12 May 2015

Quintessa and its subcontractors, Geofirma Engineering and SENES Consultants, completed the postclosure safety assessment of Ontario Power Generation's proposed Deep Geologic Repository (DGR) for Low and Intermediate Level Waste at the Bruce nuclear site in the Municipality of Kincardine, Ontario i…