The Nuclear Waste Management Organization is evaluating the safety and feasibility of the permanent disposal of used nuclear fuel in a deep geological repository. Their current design concept utilises copper-coated steel used fuel containers to isolate the waste from the environment. Immediately following repository closure, a finite quantity of O2 will be trapped inside the repository and could cause some amount of oxic corrosion to the outer copper layer of the containers. On a per container basis, 13 mol of O2 will be trapped in the repository rooms at the time of closure, based on reference design dimensions. This corresponds to a maximum depth of copper corrosion of 81 μm, assuming a uniform distribution. This work also considers the sensitivity of this oxic corrosion allowance to various hypothetical design changes to the repository that may occur before or during construction.
BoyleCHMeguidSA.Mechanical performance of integrally bonded copper coatings for the long term disposal of used nuclear fuel. Nucl Eng Des. 2015; 293: 403–412. doi: 10.1016/j.nucengdes.2015.08.011
2.
HallDSKeechPG.An overview of the Canadian corrosion program for the long-term management of nuclear waste. Corros Eng Sci Technol. 2017; 52: 2–5. doi: 10.1080/1478422X.2016.1275419
3.
DiomidisNJohnsonLH.Materials options and corrosion-related considerations in the design of spent fuel and high-level waste disposal canisters for a deep geological repository in opalinus clay. JOM. 2014; 66: 461–470. doi: 10.1007/s11837-014-0876-4
4.
GuoR.Thermal response of a mark II conceptual deep geological repository in crystalline rock. NWMO-TR-2016-03. Toronto: Nuclear Waste Management Organization; 2016.
5.
KingFHallDSKeechPG.Nature of the near-field environment in a deep geological repository and the implications for the corrosion behaviour of the container. Corros Eng Sci Technol. 2017; 52: 25–30. doi: 10.1080/1478422X.2017.1330736
6.
KingFLiljaCPedersenKAn update of the state-of-the-art report on the corrosion of copper under expected conditions in a deep geologic repository. SKB TR-10-67. Stockholm: Svensk Kärnbränslehantering AB; 2010.
7.
SKB2006Long-term safety for KBS-3 repositories at Forsmark and Laxemar – a first evaluation. SKB TR-06-09. Stockholm: Svensk Kärnbränslehantering AB; 2006
8.
KwongGM.Status of corrosion studies for copper used fuel containers under low salinity conditions. NWMO TR-2011-14. Toronto: Nuclear Waste Management Organization; 2011.
9.
NWMO. Postclosure safety assessment of a used fuel repository in crystalline rock. NWMO-TR-2017-02. Toronto: Nuclear Waste Management Organization; 2017.
10.
KingF.Overview of the corrosion behaviour of copper and steel used fuel containers in a deep geologic repository in the sedimentary rock of the Michigan basin, Ontario. OPG 06819-REP-01300-10101-R00. Toronto: Ontario Power Generation; 2005.
11.
KingF.Evolution of environmental conditions in a deep geologic repository in the sedimentary rock iof the Michigan Basin, Ontario. OPG 06819-REP-01300-10102-R00. Toronto: Ontario Power Generation; 2005.
12.
NWMO2012Used fuel repository conceptual design and postclosure safety assessment in crystalline rock. NWMO TR-2012-16. Toronto: Nuclear Waste Management Organization; 2012
13.
NWMO2013Postclosure safety assessment of a used fuel repository in sedimentary rock. NWMO TR-2013-07. Toronto: Nuclear Waste Management Organization; 2013
14.
SKB2010Design and production of the KBS-3 repository. SKB TR-10-12. Stockholm: Svensk Kärnbränslehantering AB; 2010
15.
Posiva Oy2012Description of the KBS-3H design variant. POSIVA 2012-50. Eurajoki: Posiva Oy; 2012
16.
KeechPGVoPRamamurthySDesign and development of copper coatings for long term storage of used nuclear fuel. Corros Eng Sci Technol. 2014; 49: 425–430. doi: 10.1179/1743278214Y.0000000206
17.
VoPPoirierDLegouxJ-GKeechPGDoyleDJakupiPDevelopment of cold spray technology for copper coating of carbon steel used fuel container prototypes for CANDU fuel. NWMO TR-2015-29. Toronto: Nuclear Waste Management Organization; 2015.
18.
VoPPoirierDLegouxJ-G. Application of copper coatings onto used fuel canisters for the Canadian nuclear industry. In: KarthikeyanJKayC, editors. High pressure cold spray: principles and applications. Novelty: ASM International; 2016. p. 253–276.
19.
HungC-CWuY-CKingF.Corrosion assessment of canister for the disposal of spent nuclear fuel in crystalline rock in Taiwan. Corros Eng Sci Technol. 2017; 52: 194–199. doi: 10.1080/1478422X.2017.1285855
20.
FitzGeraldKPNairnJSkennertonGAtmospheric corrosion of copper and the colour, structure and composition of natural patinas on copper. Corros Sci. 2006; 48: 2480–2509. doi: 10.1016/j.corsci.2005.09.011
21.
JohnsonLHKingF.Canister options for the disposal of spent fuel. Nagra NTR 02-11. Wettingen: National Cooperative for the Disposal of Radioactive Waste; 2003.
22.
KingFAhonenLTaxénCCopper corrosion under expected conditions in a deep geologic repository. SKB TR-01-23. Stockholm: Svensk Kärnbränslehantering AB; 2001.
23.
QinZDaljeetRAiMThe active/passive conditions for copper corrosion under nuclear waste repository environment. Corros Eng Sci Technol. 2017; 52: 45–49. doi: 10.1080/1478422X.2016.1274088
24.
HallDSRamamurthySStandishT. 2016Corrosion of copper-coated steel containers for long-term used nuclear fuel storage. 3rd Canadian conference on nuclear waste management; Decommissioning and Environmental Resoration; Ottawa, 2016
25.
StandishTChenJJacklinRCorrosion of copper-coated steel high level nuclear waste containers under permanent disposal conditions. Electrochim Acta. 2016; 211: 331–342. doi: 10.1016/j.electacta.2016.05.135
26.
StandishTEZagidulinDRamamurthySGalvanic corrosion of copper-coated carbon steel for used nuclear fuel containers. Corros Eng Sci Technol. 2017; 52: 65–69. doi: 10.1080/1478422X.2017.1306972
27.
BattinoRubin.Oxygen and ozone. In: BattinoRubin, editor. IUPAC solubility data series. Oxford: Pergamon Press; 1981. p. 1–40.
28.
GevantmanLH.Solubility of selected gases in water. In: LideDr, editor. CRC handbook of chemistry and physics. Boca Raton (FL): Taylor & Francis; 2007. p. 8-81-8-84.
29.
GuoR.Thermal response of a Canadian conceptual deep geological repository in crystalline rock and a method to correct the influence of the near-field adiabatic boundary condition. Eng Geol. 2017; 218: 50–62. doi: 10.1016/j.enggeo.2016.12.014
30.
Berberan-SantosMNBodunovENPoglianiL.On the barometric formula. Am J Phys. 1997; 65: 404–412. doi: 10.1119/1.18555
31.
BaumgartnerPTranTVBurgherR.Sensitivity analyses for the thermal response of a nuclear fuel waste disposal vault. Chalk River: Atomic Energy Canada Limited; 1994; AECL TR-621, COG-94-258.
