Coffin said until AECL is certain it has solutions to problems found during the project, they won't issue a new target date for completion.
The pressure tubes have to be crimped around the end fittings. You can't use glue here! But this is good old 60's technology, and they can't seem to do it anymore. This could be major-major, such as the wrong metal for the pressure tubes. NB should just build a new reactor to forget about this little problem... :)