Resolution of Generic Safety Issues: Item A-39: Determination of Safety Relief Valve Pool Dynamic Loads and Temperature Limits (Rev. 1) (Rev. 3) ( NUREG-0933, Main Report with Supplements 1–34 )
Operation of BWR primary system pressure relief valves can result in hydrodynamic loads on the suppression pool retaining structures or those structures located within the pool. These loads result from initial vent clearing of relief valve piping and steam quenching due to high local pool temperatures. The item addresses GE MARK I, II, and III containments and was originally identified in NUREG-03712 but was later determined to be a USI.