Nuclear power plant primary circuit voltage regulator water level measurement and calculation

Abstract: the nuclear power plant primary circuit voltage regulator water level measurement and calculation of information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. A, voltage regulator, water level control and protection of plant regulator is a nuclear reactor coolant system ( RCP) The important equipment, in the steady state operation when its maintain normal RCP pressure, when the transient its limit RCP pressure within the allowable values. In addition, the voltage regulator. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a nuclear power plant primary circuit voltage regulator water level measurement and calculation the article details. A, voltage regulator, water level control and protection of plant regulator is a nuclear reactor coolant system ( RCP) The important equipment, in the steady state operation when its maintain normal RCP pressure, when the transient its limit RCP pressure within the allowable values. In addition, the voltage stabilizer as buffer tank reactor coolant, ensure that the circuit is in a state full of water. Under the rated power, voltage regulator in about 60 ring is saturated with water, 40% for saturated steam, stabilizer (at the bottom of the Liquid area) By wave tube and RCP a loop heat pipe segment. RCP is a full of water system, pressure of regulator will spread to the whole RCP. Voltage regulator level not too high or too low, otherwise it will lead to pressure regulation failure or electric heater bare burned. There are many factors that lead to voltage regulator water level change: ( 1) Load change make the reactor coolant average temperature coolant volume change with the change; （ 2) Stabilizer on the filling flow and analyzed imbalance ( Such as open or orifice, coolant leaks and starting stage 2 pump, etc. ) 。 Stabilizer function of water level control protection system is the stabilizer of water level control near the setting value, to ensure that the voltage regulator operation condition can meet the need of pressure control, and protect the security of the equipment. Stabilizer water level measurement and monitoring water level role not only in the transmitter, and used for water level control and protection of the voltage regulator. Voltage regulator control level protection simulation diagram as shown in figure 1. From figure 1 shows, voltage regulator of the water by three independent series 6000 nuclear differential pressure level transmitter ( 0 llmn 008 mn, 007 mn) Measured at the same time, its measurement signal is sent to the electric respectively between three separate SIP protection cabinet ( SIPl group, the SIP2, SIP3 group) For data conversion, 4 ~ 20) MA current signal by the converter ( RS) Convert ( 1 ~ 5) VDC voltage signals, voltage signals and the 3 points two road, including all the way to the threshold of relay ( XU） In logic processing unit after three choose two logic operations to produce high voltage regulator level nuclear reactor trip signal. In addition to switch all the way ( 444CC） , the regulator ( 404RG） Control voltage regulator charging feed water regulator of water level control. Thus, three participating stabilizer water level control of water level measurement signal, and participate in a nuclear reactor protection tripping logic, so three water level transmitter, accurate measurement of voltage regulator and water level regulation water level protection plays an important role. Second, the water level measurement and calculation of voltage regulator figure 2 for voltage stabilizer water level measuring installation drawing. Differential pressure transmitter are connected to the lower voltage regulator tube mouth side, reflect the water pressure, on the other side connected to a reference solution capillary, capillary upper reference fluid by condensing tank connected to the voltage regulator air space, among them there is a diaphragm separates the reference fluid of capillary water and the cooling tank, in order to prevent the water stabilizer separated hydrogen bubbles into the reference fluid in the capillary formation, affect the accuracy of measurement. In voltage regulator, steam and water two phase coexistence, in the saturated state. Stabilizer water level measurement transducer, for example, to calculate the full power and stable operation condition during the time of 007 mn in O and 100% by differential pressure value and shutdown refueling maintenance required to check 007 mn to the differential pressure value of the transmitter. Hypothesis validation when the environment temperature is 25 ℃, according to the data shown in figure 2 and given the known data of 007 mn in O and 100% water level can be calculated when the pressure value. At full power, stable operating condition stabilizer absolute pressure is 15. 5 mpa, its corresponding to the saturation temperature of 344 ℃.

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