Foreign Spouse need SSN or ITIN to collect spousal SS?

[stewak2]

Dual Citizen, Canadian resident, Canadian spouse, worked in US beyond 40 quarters for SS.
Spouse has never worked or resided in US.
Spouse will be eligible to 1/2 my FRA amount at her FRA.
She does not have a US SSN nor a ITIN.
Does she need one or both to collect her US SS?
I have been filing MFS and never claiming her as dependent, it appears from W-7 she cannot get an ITIN as a dependent.
Would the SSA assign her a non-work SSN at time of application ( she is not at FRA yet and I am not collecting yet - this is preparation ).
Thanks in advance