Modular head assembly and method of retrofitting existing nuclear reactor facilities

Patent · Tue Jul 07 00:00:00 EDT 1987

OSTI ID:6299864

Malandra, L J; Ledue, R J; Hankinson, M F; Kowalski, E F

A method is described of retrofitting existing nuclear reactor facilities so as to form a modular closure head assembly for a nuclear reactor pressure vessel, where the existing nuclear reactor facilities comprise control rod drive mechanism cooling systems which include vertically extending elbow air ducts inter-connecting vertically spaced upper and lower air manifolds. The elbow air ducts extend radially beyond the peripheral envelope of the closure head, comprising the steps of: removing the upper air manifold; removing the vertically extending elbow air ducts; capping the air ports of the lower air manifold which ports were previously fluidically connecting the lower air manifold to the vertically extending elbow air ducts; disposing vertically upwardly extending air exhaust ducts above the lower air manifold in such an manner that the air exhaust ducts are disposed within the peripheral envelope of the closure head; fluidically connecting exhaust fans to the upper regions of the air exhaust ducts; fluidically connecting the lower regions of the air exhaust ducts the lower air manifold; permanently securing lift rods to the closure head at positions disposed radially outwardly of the lower air manifold; attaching a seismic support platform to the lift rods; proving fluidic passage of the vertically extending air exhaust ducts through the seismic support platform; attaching a missile shield plate to the lift rods; and proving fluidic passage of the vertically extending air exhaust ducts through the missile shield plate.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA
• Patent Number(s): US 4678623
• Application Number: TRN: 87-031835
• OSTI ID: 6299864
• 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
POWER REACTORS
PRESSURE VESSELS
RETROFITTING
CLOSURES
AIR FLOW
BLOWERS
CONTROL ROD DRIVES
COOLING SYSTEMS
DUCTS
EXHAUST SYSTEMS
FLUID FLOW
MODULAR STRUCTURES
NUCLEAR POWER PLANTS
SPACE DEPENDENCE
SUPPORTS
CONTAINERS
ENERGY SYSTEMS
GAS FLOW
MECHANICAL STRUCTURES
NUCLEAR FACILITIES
POWER PLANTS
REACTOR COMPONENTS
REACTORS
THERMAL POWER PLANTS
220200* - Nuclear Reactor Technology- Components & Accessories