Reactor vessel head permanent shield

Patent · Tue May 09 00:00:00 EDT 1989

OSTI ID:5913590

Hankinson, M F; Leduc, R J; Richard, J W; Malandra, L J

A nuclear reactor is described comprising: a nuclear reactor pressure vessel closure head; control rod drive mechanisms (CRDMs) disposed within the closure head so as to project vertically above the closure head; cooling air baffle means surrounding the control rod drive mechanisms for defining cooling air paths relative to the control rod drive mechanisms; means defined within the periphery of the closure head for accommodating fastening means for securing the closure head to its associated pressure vessel; lifting lugs fixedly secured to the closure head for facilitating lifting and lowering movements of the closure head relative to the pressure vessel; lift rods respectively operatively associated with the plurality of lifting lugs for transmitting load forces, developed during the lifting and lowering movements of the closure head, to the lifting lugs; upstanding radiation shield means interposed between the cooling air baffle means and the periphery of the enclosure head of shielding maintenance personnel operatively working upon the closure head fastening means from the effects of radiation which may emanate from the control rod drive mechanisms and the cooling air baffle means; and connecting systems respectively associated with each one of the lifting lugs and each one of the lifting rods for connecting each one of the lifting rods to a respective one of each one of the lifting lugs, and for simultaneously connecting a lower end portion of the upstanding radiation shield means to each one of the respective lifting lugs.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA
• Patent Number(s): US 4828789
• OSTI ID: 5913590
• Resource Relation: Patent File Date: Filed date 3 Feb 1984
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
CONTROL ELEMENTS
RADIATION PROTECTION
REACTOR VESSELS
SHIELDS
AIR FLOW
CONTROL ROD DRIVES
PRESSURE VESSELS
REACTOR SAFETY
CONTAINERS
FLUID FLOW
GAS FLOW
REACTOR COMPONENTS
SAFETY
220900* - Nuclear Reactor Technology- Reactor Safety
220300 - Nuclear Reactor Technology- Fuel Elements