Method and apparatus for control rod drop monitoring
This paper describes a system for continuously monitoring control rod drop times in a reactor. It comprises: means for receiving a reactor trip signal and for generating an initiation signal; timer circuits, each timer circuit being associated with one of a plurality of control rods, including means for receiving a control rod position signal indicative of each associated control rod at a predetermined insert position and for generating a deactivation signal, first latching means for retaining the initiation signal generated by the receiving means, second latching means for retaining the deactivation signal received by the receiving means, a timer actuated by the initiation signal and the timer being deactivated by the deactivation signal, and means for displaying the output of the timer to represent the individual rod drop time.
- Assignee:
- Joyner Engineers and Trainers, Inc., Forest, VA (USA)
- Patent Number(s):
- US 5006301; A
- Application Number:
- PPN: US 7-327251
- OSTI ID:
- 5079193
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220400* -- Nuclear Reactor Technology-- Control Systems
220600 -- Nuclear Reactor Technology-- Research
Test & Experimental Reactors
CONTROL ELEMENTS
DESIGN
FASTENERS
MONITORING
REACTOR COMPONENTS
REACTOR MONITORING SYSTEMS
ROD DROP METHOD
TIME MEASUREMENT