Interlock explanation
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Could someone explain this interlock mechanism, especially FY10402A and B? And why are there so many flow meters installed on the furnace?
In this interlock, FY10402A and B are the horizontal control valves for the two fuel pools. When the water level in a fuel pool is too high, FY10402A will shut down to prevent excessive water from entering the fuel pool ； And when the water level in another fuel pool is too low, FY10402B will open to allow more water to enter the fuel pool in order to maintain a safe level. As for why there are so many flow meters installed on the furnace, it is likely to ensure uniform flow and temperature of the cooling water around the fuel rods, thereby ensuring the stable operation of the nuclear reactor. At the same time, the measurement data from multiple flowmeters can verify each other, enhancing the reliability and security of the system. .
Ratio control? SP is externally given, while FY10402A (÷) and FY10402B (+) are operation modules. It depends on the instructions.
Okay, thank you. The SP value for FC10402 comes from LC10702; is it a level compensation? Is it calculated along with traffic control?
This post was last edited by jlshnlhj on 2023-3-29 at 11:29. Generally, LC10702-FC10402 are used in cascade control, and it depends on the purpose of the control. If the purpose of control is to stabilize the liquid level, it is cascade control. If the goal of control is to avoid severe and frequent fluctuations in liquid level or flow rate, then it can be considered as uniform control. Its characteristic is that both the proportional gain and the integration time are high; the curve fluctuates within acceptable limits, making large but slow movements rather than sharp ones.
So many flow monitors and interlocks are installed to ensure the safety of the furnace
It’s not clear how the two controllers, FC10402 and FC10403, operate
This post was last edited by jlshnlhj on 2023-3-30 at 16:00. Upon seeing this diagram, it seems that there is a misunderstanding regarding LC10702-FC10402 – the FV10402 valve is not present. 4th floor: FC10402-FY10402A(÷)-FY10402B-FC10403(+) to the SP of FC10403 (given), ratio control? It depends on the instructions. 6th floor: LC10702-FC10402 are used to constitute cascade control or uniform control. It’s impossible to tell now, as this diagram is quite comprehensive and there is no FV10402 valve at all. Summary: LC10702-FC10402-FY10402A(÷)-FY10402B-FC10403(+) to SP of FC10403 (given), ratio control? Multivariate? It depends on the instructions and calculation formulas. In particular, the modules and relationships of LC10702-FC10402.
If you work in the process field, take a look at HGT 20505
HGT 20505-2014 Functional indicators and graphic symbols for process measurement and control instruments https://bbs.hcbbs.com/thread-1784642-1-1.html
Can you tell what the X in FXT14000 means?