News
 Industry News  
 Company News  
 
Home > News > Industry News
Greenland ice sheet project contributes to repository safety
2016-9-9

Newly published findings from a five-year international project to study conditions at the surface and below the Greenland Ice Sheet will be used in evaluations of the future safety of deep geological repositories over time frames of up to a million years.

The Greenland Analogue Project (GAP) has been carried out by the nuclear waste management organizations of Canada, Finland and Sweden. All three countries have experienced multiple ice ages over the last million years - with one occurring every 100,000 years on average - so an understanding of ice sheet conditions is vital in planning for the long-term management of a deep geological repository for used nuclear fuel.

The GAP ran from 2008 to 2013 as a collaborative research project of Canada's Nuclear Waste Management Organizations (NWMO), Finland's Posiva and Sweden's Svensk Kärnbränslehantering AB (SKB), bringing together specialists, research scientists and engineers from six countries. It focused on increasing understanding of how an ice sheet reacts with areas both above and below ground. The Greenland Ice Sheet, on which the studies were conducted, is the second largest in the world and is comparable to ice sheets predicted to extend over both Scandinavia and Canada in future ice ages.

The studies involved direct and indirect observations of ice sheet movement, meltwater runoff, water pressure due to the weight of the sheet, and water transfer from the ice sheet to areas below the ice surface. Boreholes were drilled through the ice sheet to the point of contact with the underlying rock to measure the underground pressure exerted by the ice sheet. A borehole was also drilled at the edge of the sheet at a depth approximating repository conditions to enable hydraulic and chemical monitoring to be carried out. Weather stations monitored climate conditions.

The three partner organizations described the findings of the study as "positive". Posiva's Anne Kontula, research manager and deputy project manager for GAP, said: "Having a greater understanding of the pressure and movement of water at depths associated with deep geological repositories will help further international understanding and best practices associated with the management of used nuclear fuel."

The NWMO's Monique Hobbs said the results from the project provided "never-before-seen information" on the water pressure at the base of an ice sheet, as well as details about where and how much meltwater is generated, at both the surface and the base of the ice sheet, and on how water travels from the surface through the ice.

Lillemor Claesson Liljedahl, GAP Manager for SKB, said the boreholes and results from modelling studies confirmed that water pressure corresponding to 92% of ice thickness accurately describes the average water pressure under the entire ice sheet over a one-year period. "This new information indicates that the conditions under an ice sheet assumed in both earlier and ongoing safety assessments were realistic," she said.

The findings from GAP will be used in comprehensive, detailed studies used to evaluate the safety of deep geological repositories over long time-frames. Liljedahl also said the findings, which had increased the available data on the processes in and under an ice sheet, would be of ongoing value for glaciaologists and climate scientists. Further data gathered from ongoing monitoring of the borehole and from the weather stations will help broaden knowledge of the conditions and processes under the ice, she said.

SKB's application for an integrated system for the final disposal of used nuclear fuel and radioactive waste received approval from the country's Radiation Safety Authority earlier this year. Posiva last year received a licence from the Finnish government to construct an encapsulation plant and final repository for used fuel at Olkiluoto, while the NWMO is conducting a phased process to identify a site for a deep repository for Canada's used nuclear fuel.

Researched and written
by World Nuclear News

  
 
2018-6-14
Decommissioning plan for Tokai approved
2018-6-14
Cooperation strengthens mining radiation protection
2018-6-14
Ontario Power Generation starts rebuilding Darlington 2
2018-6-14
Steam generators in place at Hongyanhe 5
2018-6-14
USA launches Summit supercomputer
2018-6-8
First criticality achieved at Chinese EPR
2018-6-8
SNC-Lavalin signs agreement on Bellefonte completion
2018-6-8
WIPP returns to routine operations
2018-6-8
ERA publishes closure plan for Ranger
2018-6-8
EDF agrees to nuclear energy cooperation with Brazil
2018-6-1
US energy regulators back Illinois legislation
2018-6-1
Toshiba scraps project to build ABWRs in Texas
2018-6-1
Kansai cuts power rates as reactors restart
2018-6-1
Olkiluoto EPR prepares for fuel loading
2018-6-1
France, Russia extend nuclear power cooperation
2018-5-25
Alliance launched to highlight nuclear on world stage
2018-5-25
New Jersey clean energy laws signed
2018-5-25
Belarus, Kazakhstan to cooperate in nuclear power
2018-5-25
Dome installed at first Fangchenggang Hualong One
2018-5-25
GNF to fuel Entergy BWRs with advanced fuel
2018-5-18
Belgium and China award simulator contracts
2018-5-18
Progress for WIPP infrastructure upgrade
2018-5-18
Perry scraps completion of US MOX facility
2018-5-18
Rosatom expands overseas links with new agreements
2018-5-18
NWMO broadens its international cooperation
2018-5-11
FirstEnergy responds to PJM grid reliability findings
2018-5-11
Nuclear for US grid resilience and climate
2018-5-10
Dome installed on Tianwan 6 containment building
2018-5-10
Other signatories express support for JCPOA
2018-5-10
TVA completes major flood protection
2018-5-8
Robots get smarter to help with decommissioning
2018-5-4
Fuel supply contracts signed for Swedish reactors
2018-5-4
New cracks delay restart of Hunterston B reactor
2018-5-4
Training milestones for new plant operators
2018-5-4
First Energy responds to PJM grid reliability findings
2018-5-4
NASA successfully tests Kilopower reactor
2018-4-27
Philippines to draw up nuclear energy policy
2018-4-27
IAEA reviews safety at South Ukraine unit 3
2018-4-27
Fuel loading under way at Chinese AP1000
2018-4-27
Macron: Europe must prioritise emission reductions
2018-4-27
Iran's Bushehr I changes to TVS-2M fuel
2018-4-20
6th Annual Nuclear Information Technology China Forum
2018-4-20
2nd Nuclear Power Maintenance Tool Seminar
2014-9-19
The Preparation Meeting of the First International Nuclear Plant Operation and Maintenance Conference 2014 Successfully held in Shanghai.
2014-9-19
NNBCS2014 Concluded a Great Success on August 27-29 in Shanghai!
2014-7-21
China's Xi hails 'new horizons' in ties with Argentina
2014-7-21
China nuclear contractor seeks merger with CPIC
2014-7-11
Investment program for Slovenian repository
2014-7-11
Supercomputer team wins award for core work
2014-6-17
Chinese Premier expected to sign UK nuclear deal
2014-6-17
Changjiang 2 vessel put in place
2014-6-13
Fourth Yangjiang unit gets its dome
2014-6-13
Sogin, CGN cooperate on waste management
2014-6-13
China produces first AP1000 vessel
2014-6-12
The 6th Annual Nuclear New Build China Summit
2014-6-6
Fuel loading at Fuqing 1
2014-6-6
China schedules new nuclear power reactors
2014-6-6
Fukushima ice wall under construction
2014-6-3
China Association of Plant Engineering Consultants
2014-5-27
China, Iran agree to push bilateral cooperation to new stage
2014-5-12
Mining operations begin at Husab
2014-5-9
Yangjiang 2 approaches start up
2014-5-8
Ningde 2 in commercial operation
2014-5-4
MBIR reactor supplier selected
2014-4-28
Political discord places Lungmen on hold
2014-4-28
Landmarks for Chinese reactors
2014-4-22
The 6th Annual Nuclear New Build China Summit 2014 will start up on August 27th in Shanghai, China!
2014-4-22
NITF2014 Concluded a Great Success on April 10-11 in Shanghai!
2014-4-22
Accelerating the Progress of Nuclear Power Informatization, building a safe and high-efficiency operation environment! —NITF 2014 will Start up on April 10-11, 2014 in Shanghai, China!
2014-4-22
Expanding Your Company’s Value in Nuclear IT Industry——The 2nd Annual Nuclear Information Technology China Forum 2014 is Coming Back!
About Us
Who We Are
Our Culture
Nuclear Summit
Event Center
Professional Service
Industry Information
Project Consulting
Training Course
Event Outsourcing
Join Us
Job Opportunities
Career Development
Contact Us
Tel: (+86-21) 6073 7200
Fax: (+86-21) 6176 8133
Email: info@innchinc.com
 
© 2018 INNCH INTERNATIONAL CO.,LTD. All Rights Reserved 技术支持:上海网站建设