When Rand and Nynaeve cleansed Saidin, the female half of the saángreal was destroyed.
During the Battle near Shadar Logoth, Nynaeve al'Meara and Rand linked outside Shadar Logoth, and tapped the Choedan Kal through the access ter'angreal. Rand was successful in cleansing the taint from saidin, but in the attempt, the female access key was destroyed as well as the sa'angreal itself.
From my understanding, Rand being more powerful channeled way more one power as compared to Nynaeve. Shouldn't the male half thus be more susceptible to destruction? Why is it then that the female access key and saángreal were destroyed and not the male one?