There definitely are anti-torpedo 'hard-kill' interceptors in service with the major navies, together with both active and passive high-frequency sonars that are specifically calibrated to detect incoming torpdoes. The interceptors are generally light torpedoes themselves, and are often dual purpose ASW and anti-torpedo torpedoes. For example, the Russian Paket-NK torpedo system is intended for that purpose. I am not sure what you mean by successful or viable - if by battle-tested, then probably not, and the same can be said about most of the modern naval technology, because there has not been any recent naval wars between technologically equivalent adversaries. People who say that Western naval techs have been battle-tested usually have no idea what they are talking about.