An improved modular reactor head shielding system (100) is provided that includes a frame (102) which is removably assembled on a reactor head (12) such that no structural or mechanical alteration of the head (12) is required. The shielding system (100) also includes hanging assemblies (110) to mount flexible shielding pads (38, 38 min ) on trolleys (108) which can be moved along the frame (102). The assemblies (110) allow individual pivoting movement of the pads (38, 38 min ). The pivoting movement along with the movement allowed by the trolleys (108) provides ease of access to any point on the reactor head (12). The assemblies (110) also facilitate safe and efficient mounting of the pads (38, 38 min ) directly to and from storage containers (128) such that workers have additional shielding throughout virtually the entire installation and removal process. The flexible shielding pads (38,38 min ) are designed to interleave with one another when assembled around the reactor head (12) for substantially improved containment of radiation leakage.
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