Back to the Polar 10. Thanks to this handy
online resource from the
Marine Museum of the Great Lakes at Kingston, I found a few interesting things. Among them is a reference that seems to suggest that CECO Consultants Ltd. was also involved in the domestic side of the Polar 10 project, at least at the outset:
3492 ------- CECO Nuclear Icebreaker 1976
This reference may refer to German & Milne's hybrid (nuclear-conventional) design, though it is not 100% certain:
3789 --------- Propulsion System Study for 1979 Icebreaker [three boxes]
This reference though is definitely related to German & Milne's two primary designs for the program:
3800 -------- C.C.G. Nuclear Icebreaker 1975-79
This reference seems to be in regards as to the pure nuclear design, circa 1980:
3855 -------- Nuclear Icebreaker 1979-80
While this seems to be related to the hybrid design:
3856 --------- Nuclear Polar Icebreaker 1979
It is unclear if this is related to Polar 10, though it seems likely. Perhaps a study into a common propeller for both Polar 7 and Polar 10?:
l3870 ------- Polar Icebreaker Propeller Study 1976-80
Little ambiguity about this one:
3889 -------- Nuclear Icebreaker Propeller 1973,77,80
I think these are the two separate design proposals as of 1979:
6015 --------- Proposal Nuclear Icebreaker 1979
6016 --------- Proposal Nuclear Icebreaker 1979
Was this one a variant of the pure design with a Rolls Royce reactor? Possibly even directly related to the British proposal for the program?:
6017 --------- Proposal Nuclear Icebreaker 1979 Rolls Royce
Could this one be a variant of the pure nuclear design with a Franco-Canadian reactor?:
6018 --------- Proposal Nuclear Icebreaker 1979 Alsthom Canatom
Interestingly, with regards as to the supposedly non-nuclear Polar 7 project, I found mention of at least two German & Milne nuclear powered designs:
D1206 C3316 Polar 7 Nuclear Icebreaker CCG. 1974
D1222 C3393 Polar 7 Nuclear Icebreaker n.d.
And a reference to other documentation which seems to suggest that interest in a nuclear powered icebreaker actually dated back to 1965, six years before work began on the Polar 7 project:
3393 1220 Polar 7 Nuclear Icebreaker [three cases]1965,74-75
Quite likely all this ultimately led to the Polar 10 project being approved in 1976.
This reference supports the idea that the work on nuclear designs for Polar 7 were split off into the Polar 10 project. It also indicates that CECO were involved in the Polar 7 project, at least pre-split:
3540 -------- CECO Polar 7 Nuclear Icebreaker 1976-77