Explosion mitigating vault

A controlled pressure relief vault panel capable of moving to an unseated position from a seated position with respect to a vault opening to relieve pressure, the vault opening having a vault panel receiving surface and peripheral wall, the vault panel comprising:

• a vault panel inner surface, outer surface opposing said inner surface, and a vault panel peripheral edge;
• at least one projection with a first end affixed to said vault panel inner surface and a second end including a retention assembly defining a length therebetween, said retention assembly including at least one retainer leg extending perpendicularly to said projection, a spring associated with said projection and positioned on said projection relative to said retainer leg;
• wherein, in an active position, said retainer leg extends radially past said vault panel peripheral edge and beneath the vault such that in response to increased pressure, the panel has a panel range of vertical movement outwardly from the vault to allow the escape of fluids through the vault opening;
• and
• an access opening in the vault panel extending from said vault panel inner surface through said vault panel outer surface and defining a cover frame;
• and
• a cover adapted to move from a cover seated position to a cover unseated position with respect to said cover frame.

A controlled pressure relief vault panel capable of moving to an unseated position from a seated position with respect to a vault opening to relieve pressure, the vault opening having a vault panel receiving surface and peripheral wall, the vault panel comprising:

• a vault panel inner surface, outer surface opposing said inner surface, and a vault panel peripheral edge;
• at least one projection with a first end affixed to said vault panel inner surface and a second end including a retention assembly defining a length therebetween, said retention assembly including a spring having a first end and a second end opposing the first end, said spring affixed to said projection at or near said second end of said projection;
• wherein said first and second ends of said spring each extend radially past said vault panel peripheral edge and beneath the vault such that in response to increased pressure, the vault panel has a vault panel range of vertical movement outwardly from the vault to allow the escape of fluids through the vault opening;
• and
• an access opening in the panel extending from said vault panel inner surface through said vault panel outer surface and defining a cover frame;
• and
• a cover positioned within and covering said access opening.