How can I enable the console in Survival mode?

Update:

A mod has been released that lets you enable survival mode multiple times. There is no .esp file, so no workaround is needed to load the mod. Now you can disable survival mode, use the console, and then re-enable survival. Note that all the survival stats (hunger, thirst, etc) will be reset.

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Bethesda has disabled the console for the beta Survival mode as can be seen here and here (from an official Bethesda source).

There is currently no known workaround. Since it is disabled intentionally as a feature to prevent cheating, it is likely hard-coded and not changeable through modifying config files, as that would defeat the purpose.