Support arrangement for core modules of nuclear reactors
- Schenectady, NY
A support arrangement is provided for the core modules of a nuclear reactor which provides support access through the control drive mechanisms of the reactor. This arrangement provides axial support of individual reactor core modules from the pressure vessel head in a manner which permits attachment and detachment of the modules from the head to be accomplished through the control drive mechanisms after their leadscrews have been removed. The arrangement includes a module support nut which is suspended from the pressure vessel head and screw threaded to the shroud housing for the module. A spline lock prevents loosening of the screw connection. An installation tool assembly, including a cell lifting and preloading tool and a torquing tool, fits through the control drive mechanism and provides lifting of the shroud housing while disconnecting the spline lock, as well as application of torque to the module support nut.
- Research Organization:
- Knolls Atomic Power Laboratory (KAPL), Niskayuna, NY
- DOE Contract Number:
- AC12-76SN00052
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4643868
- OSTI ID:
- 866146
- Country of Publication:
- United States
- Language:
- English
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arrangement
arrangement provides
assembly
attachment
axial
cell
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control
control drive
core
core modules
detachment
disconnecting
drive
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including
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installation
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leadscrews
lifting
lock
loosening
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module
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nuclear
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nut
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screw
screw thread
shroud
spline
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suspended
threaded
tool
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torque
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vessel
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