Loose parts vibration monitoring system Flashcards
Two types of categories
Loose and free
Purpose/locations monitored
At least 6 channels and associated amplifier operable and monitoring ‘natural collection regions” of the RCS (reactor head, reactor bottom, and a channel head associated with each SG).
Accelerometer is used for vibration monitoring and produces an output by…….
Vibrations cause base to move, moves weight which compresses and stretches the crystal stack. Develops electric current for input to VLPMS.
Rod motion will send a signal to the master control module and _____ any output alarms.
Inhibit
Which locations specifically are monitored?
Reactor head, reactor bottom, SG hot and cold channel heads, rcp #1 seal injection lines, shell cones, steam drums
Two alarms, _____ indicates a component alarming, _____indicates problem with the system.
Loose part alarm; system alarm
Channel high alarm comes in when both the ______ and ______ setpoints exceeded.
Fixed and floating
TRM requirements regarding LPVM system apply in which modes?
Modes 1 and 2
Time limit:
No alarm sent to operator unless 2 alarms within 2 minutes.
Power for this system come from ________
Non ESF 134X5
What is a loose part?
A metallic object that can be moved by fluid flow.
Flow path from component to alarm:
Accelerometer to Pre amp to patch panel to signal control module to switch to master control module to plant computer
