We check this website, now tuvaculture.ru is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is tuvaculture Down Right Now? - NO! tuvaculture is up!
If you have problem with access to site tuvaculture, and domain tuvaculture.ru is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).