Why I rarely allow “Release in enclosed space, in direct contact with outside air” to be credited in my WCS’s (NH3)

So I asked Google Gemni + to calculate the pressure wave in a room that is 40′ X 40′ X 20′ tall with a 5,000-gallon pressure vessel 85% full of liquid NH3, and it catastrophically fails. How much of a pressure wave will this event create in psig? I promise you this… No Engine Room I have ever been in could withstand this event! Google Gemini + equated it to TNT!