There's no "successful" treatment which ensures immunity from HPV infections.
Radiation and chemotherapy action is only to destroy the malignant cells, not to "train" nor to protect the immune system.
Au contraire-my opinion only- these procedures weaken the immune system further, by also killing healthy cells in the process.
Your best option is to always practice safe sex and to take all necessary precautions, including avoidance of sexual contact with high risk partners.
Best Regards,
Niko