NPO’s new Cono Seals shield package exemplifies another unique and ideal application for T – Flex®. The Cono Seals are a significant dose contributor during reactor head disassembly and, most recently, reactor head cavitation peening in PWR’s. NPO used Tungsten T – Flex to achieve a HVL (half value layer) of shielding from Co – 60. Simple Velcro straps are used for quick securement. The shielding was designed with flexibility to accommodate some unknown dimensions in the Cono Seals themselves. For example, the middle piece acts as a ‘slip joint’ to cover a 4 inch uncertainty/variation in height.