Ah okay. HT is given either as tablets or injections, depending on which type. it varies from onco to onco but some will suggest 6 months, 2 years or 3 years of HT with the RT while others think that HT is unnecessary with salvage or adjuvant RT. Some will say that the man should have a month of tablets and then 2 - 3 years of injections (that is to stop tumour flare when the injections start) while others will recommend 6, 9 months or 2 years of tablets. It is crazy how much variation there is.
Research says that ART / SRT are more likely to be successful if given with HT, and other research says the longer you stick with the HT the better the outcome. Much is down to the side effects though - my husband stopped the hormones early because he hated the side effects. Usually, the hormones are given for 3 months before the RT starts although research suggests that the longer he takes hormones before RT the better the outcome.
At this stage, you can't even begin to guess what will be recommended in your case. Hopefully, the urologist is just going to tell you that he is making a referral to an oncologist so you can talk to the onco about what s/he recommends.