CARE AND PRECAUTION REQUIRED FOR 'WIRE' & 'WIRING' IN REACTOR CONTROL AND INSTRUMENTATION SYSTEM: EXPERIENCE FROM KAKRAPAR TO KAIGA

摘要

A salient point may be put to conclude this: "A wire which is a short circuit for LF signal may be an open circuit for HF". The PCB, mother board and design may be robustly made, but "spurious" stoppage is observed in NPP C&L Do not always blame the EC Bus board design or ECPS, but have a look at basic WIRES. Enquire if the PS wiring as implemented in NPP takes care of high speed design. Find out whether spacers are essential for FRC separation, or whether we need to braid the FRC for EMI protection ?, etc. Hence, in order to elevate plant availability due to state- of-the-art high speed C&l, look at the basic WIRES & RESPECT them; the answer may as well be there, instead of blaming Indigenous EC bus board design & ECPS. The compact reactor C&l wiring inspection does raise EMI red flag, hence some technique ought to. be sought there. Here, deviation from FRC to point-to-point I/O wiring was done without G-S-G-S concept; perhaps signal profiling there will be aberrated and will not be so EMI/EMC friendly. Hence, do give weightage to each and every wire & wiring, they are not trivial, but as important as state-of-the-art C&l. Change in mindset of using only ROUND, wire in C&l is too required to elevate plant C&l availability with state-of-the-art computer control systems.