Patent Number: 044329326
Section: claims

1. A reactor head shielding system for a nuclear power reactor head, said system comprising: a nuclear power reactor head; a plurality of flexible shielding means secured to said reactor head in an interleaved manner to form a double layer of said shielding means at all points around the covered portion of said reactor head, said plurality of shielding means substantially covering said reactor head on at least a substantial portion around the sides of said reactor head for substantially negating radiation exposure;  each of said shielding means including an offset configuration for interleaving along the length thereof with adjacent ones of said shielding means around the reactor head, said offset configuration formed by at least two sleeves secured and assembled together, each of said sleeves being secured to one another longitudinally along the length thereof to form a sealed seam therebetween and offset transversely to one another so as to enable the formation of said interleaved double layer of said shielding means at all points around said covered portion of said reactor head when said shielding means are juxtaposed to one another and secured longitudinally to each other and to said reactor head sufficiently to substantially eliminate any direct radiation paths between said juxtaposed shielding means;  each of said sleeves including therein a pair of radiation attenuating blankets secured and assembled within an outer casing, said casings secured to one another longitudinally along the length thereof, each of said blankets and casings being secured transversely and longitudinally within its respective sleeve to eliminate any shifting and settling of radiation attenuating material when said shielding means are secured to said reactor head; and  each of said shielding means including assembly means for detachably securing said shielding means to said reactor head, said assembly means including a mounting plate and plate-type means to secure one end of each of said two sleeves to said mounting plate in said offset configuration.  each blanket is formed from lead wool.  said blankets are tapered along the length thereof to conform to a tapered reactor head.  said assembly means includes straps adapted to be secured to each of said adjacent shielding means.  means for covering the vent ports in the reactor head.  said vent covering means including plate means shaped to cover the vent ports and adapted to fit thereover. 2. The reactor shielding system of claim 1 wherein: 3. The reactor shielding system of claim 1 wherein: 4. The reactor shielding system of claim 1 wherein: 5. The reactor shielding system of claim 1 further including: 6. The reactor shielding system according to claim 5 including: