Method for adjusting parameter data of nuclear instrumentation system

Abstract

The invention relates to a method for adjusting parameter data of a nuclear instrumentation system, and the method comprises the steps: obtaining the parameter data of a power range before modification, the parameter data of the power range to be modified, and the current data of an ionization chamber actually measured by a nuclear instrumentation, and the parameter data of the power range before modification at least comprise a nuclear power coefficient Gk0 corrected before modification; calculating a nuclear power value before modification and an instantaneous nuclear power value to be modified; calculating a first nuclear power deviation; determining a relationship between the first nuclear power deviation and a preset nuclear power deviation; if the nuclear power value is within the preset nuclear power deviation, calculating a first group of intermediate parameter data according to the nuclear power value before modification, the instantaneous nuclear power value to be modified and the parameter data to be modified of the power range; through the first group of intermediate parameter data, it can be prevented that due to parameter modification, short-time nuclear power indication deviation is too large, and unnecessary power change rate fast alarm is triggered.

Description

Technical Field

[0001] The invention relates to the field of reactor control and protection systems, and in particular to a method for adjusting parameter data of a nuclear instrument system. Background Art

[0002] There are 4 out-of-core instrument parameters, namely K U , K L , a and G k After the calibration test of the out-of-core instrument parameters, the above four parameters need to be modified. There are three parameters related to power display in the out-of-core instrument parameters, namely K U , K L and G k . Because during the modification process G k The parameters are filtered and delayed in taking effect, resulting in only K U , K L In some cases, the short-term nuclear power indication deviation exceeds 5% FP, which triggers an unnecessary power change rate fast alarm. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the external nuclear instrument is modified G k After the parameters are adjusted, due to filtering and delay, the short-term nuclear power indication deviation is large, and it is easy to mistakenly trigger the power change rate alarm. A method for adjusting the parameter data of the nuclear instrument system is provided.

[0004] The technical solution adopted by the present invention to solve the technical problem is: construct a method for adjusting parameter data of a nuclear instrument system:

[0005] S1: Acquire parameter data of the power range before modification, parameter data of the power range to be modified, and current data of the ionization chamber actually measured by the nuclear instrument, wherein the parameter data of the power range before modification at least includes the corrected nuclear power coefficient (Gk0) before modification;

[0006] S2: Calculate the core power value before modification according to the parameter data of the power range before modification and the current data;

[0007] S3: Obtaining the instantaneous nuclear power value to be modified according to the modified nuclear power coefficient (Gk0) before modification, the parameter data to be modified of the power range and the current data;

[0008] S4: Calculating a first nuclear power deviation according to the nuclear power value before modification and the instantaneous nuclear power value to be modified;

[0009] S5: Determine the relationship between the first core power deviation and a preset core power deviation;

[0010] S6: If it is within the preset nuclear power deviation, a first set of intermediate parameter data is calculated according to the nuclear power value before modification, the instantaneous nuclear power value to be modified and the parameter data to be modified of the power range;

[0011] S7: using the first set of intermediate parameter data and the parameter data to be modified of the power range of the power range to adjust the nuclear power in sequence, so that the nuclear power deviation of each adjustment is within a safe range.

[0012] In one embodiment, the acquisition of the parameter data of the power range before modification further includes: the upper coefficient of the power range before modification (K U,0 ) and the power range lower coefficient before modification (K L,0 );

[0013] The parameter data to be modified for the power range includes: the upper coefficient of the power range to be modified (K U,2 ), it is proposed to modify the lower coefficient of the power range (K U,2 ) and the proposed revision of the revised nuclear power power factor (Gk2);

[0014] The current data of the ionization chamber measured by the nuclear instrument includes: the upper current data I U , lower current data I L .

[0015] In one embodiment, the S2 includes: U,0 ), the lower coefficient of the power range before modification (K L,0 ), the modified nuclear power coefficient before modification (Gk0), the upper current data (I U ), the lower current data (I L ) is brought into the first preset formula to obtain the nuclear power value before modification (Pr0);

[0016] The first preset formula is:

[0017] Pr0=Gk0×(K U,0 ×I U +K L,0 ×I L ).

[0018] In one embodiment, the S3 includes: modifying the pre-modification corrected nuclear power coefficient (Gk0), the proposed modified power range upper coefficient (K U,2 ), the proposed modification of the power range lower coefficient (K L,2 ), the upper current data (I U ) and the lower current data (I L) is substituted into the second preset formula to obtain the instantaneous nuclear power value to be modified (Pr2);

[0019] The second preset formula is:

[0020] Pr2=Gk0×(K U,2 ×I U +K L,2 ×I L ).

[0021] In one embodiment, the set of intermediate parameters includes: a first intermediate power range upper coefficient (K U,1 ), the first intermediate power range lower coefficient (K L,1 ) and the first intermediate corrected nuclear power coefficient (Gk1).

[0022] In one embodiment, the S6 includes:

[0023] If it is within the preset nuclear power deviation, the nuclear power value before modification (Pr0) and the instantaneous nuclear power value to be modified (Pr2) are substituted into a third preset formula to obtain a first intermediate coefficient (K);

[0024] The first intermediate coefficient (K) is multiplied by the upper coefficient (K U,2 ) to obtain the first intermediate power range upper coefficient (K U,1 );

[0025] The first intermediate coefficient (K) is multiplied by the lower coefficient (K L,2 ) to obtain the first intermediate power range lower coefficient (K L,1 );

[0026] The proposed modified nuclear power coefficient (Gk2) is divided by the first intermediate coefficient (K) to obtain the first intermediate modified nuclear power coefficient (Gk1).

[0027] In one embodiment, the third preset formula is:

[0028]

[0029] Among them, Pr0 is the nuclear power value before modification, Pr2 is the instantaneous nuclear power value to be modified, and K is the first intermediate coefficient.

[0030] In one embodiment, the method further comprises:

[0031] S8: If it is greater than the preset core power deviation, calculating a second set of intermediate parameter data and a third set of intermediate parameter data according to the core power value before modification, the instantaneous core power value to be modified and the parameter data to be modified of the power range;

[0032] S9: Use the second set of intermediate parameter data, the third set of intermediate parameter data and the parameter data to be modified of the power range to adjust the nuclear power in sequence, so that the nuclear power deviation of each adjustment is within a safe range.

[0033] In one embodiment, the second set of intermediate parameter data includes: a second intermediate power range upper coefficient (K U,1.1 ), the second intermediate power range lower coefficient (K L,1.1 ), the second intermediate corrected nuclear power factor (Gk 1.1 );

[0034] The third group of intermediate parameter data includes: the third intermediate power range upper coefficient (K U,1.2 ), the third intermediate power range lower coefficient (K L,1.2 ) and the second intermediate corrected nuclear power factor (Gk 1.2 ).

[0035] In one implementation, the S8 includes, if it is greater than the preset nuclear power deviation, substituting the nuclear power value before modification (Pr0) and the instantaneous nuclear power value to be modified (Pr2) into a fourth preset formula to obtain the second intermediate coefficient (K1);

[0036] The second intermediate coefficient (K1) is multiplied by the upper coefficient (K U,2 ) to obtain the second intermediate power range upper coefficient (K U,1.1 );

[0037] The second intermediate coefficient (K1) is multiplied by the lower coefficient (K L,2 ) to obtain the second intermediate power range lower coefficient (K L,1.1 );

[0038] The proposed modified nuclear power factor (Gk2) is divided by the second intermediate factor (K1) to obtain the second intermediate modified nuclear power factor (Gk 1.1 );

[0039] Substituting the nuclear power value before modification (Pr0) and the instantaneous nuclear power value to be modified (Pr2') into the fifth preset formula to obtain the third intermediate coefficient (K2);

[0040] The third intermediate coefficient (K2) is multiplied by the upper coefficient (K U,2 ) to obtain the second intermediate power range upper coefficient (K U,1.2 );

[0041] The second intermediate coefficient (K2) is multiplied by the lower coefficient (K L,2 ) to obtain the second intermediate power range lower coefficient (K L,1.2 );

[0042] The proposed modified nuclear power factor (Gk2) is divided by the second intermediate factor (K2) to obtain the second intermediate modified nuclear power factor (Gk 1.2 );

[0043] The fourth preset formula is:

[0044]

[0045] Wherein, K1 is the second intermediate coefficient, Pr0 is the nuclear power value before modification, and Pr2 is the instantaneous nuclear power value to be modified;

[0046] The fifth preset formula is:

[0047]

[0048] Among them, K2 is the third intermediate coefficient, Pr0 is the nuclear power value before the modification, and Pr2 is the instantaneous nuclear power value to be modified.

[0049] The implementation of the present invention has the following beneficial effects: by obtaining the parameter data before the modification of the power range, the parameter data to be modified of the power range and the measured ionization chamber current, the nuclear power values ​​before and after the modification are calculated and compared, the instantaneous nuclear power change after the modification is calculated, and it is determined whether the change is within the preset nuclear power deviation. If so, the intermediate parameter data is calculated, which effectively prevents the triggering of unnecessary power change rate fast alarm due to excessive deviation of short-term nuclear power indication caused by parameter modification. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0051] Figure 1 It is a schematic diagram of the structure of a nuclear instrument system of the present invention in which the power range has four measurement channels;

[0052] Figure 2 It is a schematic diagram of the structure of four ionization chamber detectors in the measurement channel of the present invention;

[0053] Figure 3 This is a schematic diagram of the rapid alarm of nuclear power changing with time according to the present invention;

[0054] Figure 4 It is a flow chart of a method for adjusting parameter data of a nuclear instrument system according to the present invention;

[0055] Figure 5It is a schematic diagram of nuclear power comparison trend of the method for adjusting parameter data of nuclear instrument system of the present invention. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] Aiming at the technical problems existing in the background technology: after the Gk parameter of the off-core nuclear instrument is modified, due to filtering and delay, the short-term nuclear power indication deviation is large, and it is easy to mistakenly trigger the power change rate fast alarm. The present invention provides a method for adjusting the parameter data of a nuclear instrument system, by obtaining the parameter data before the modification of the power range, the parameter data to be modified of the power range and the measured ionization chamber current, calculating and comparing the nuclear power values ​​before and after the modification, calculating the instantaneous nuclear power change after the modification, and judging whether the change is within the preset nuclear power deviation. If so, the intermediate parameter data is calculated, which effectively prevents the triggering of unnecessary power change rate fast alarms due to excessive deviations in the short-term nuclear power indication caused by parameter modification.

[0058] During the normal operation or extended operation of a nuclear power unit, it is necessary to regularly adjust the parameters of the off-core nuclear instrument system. When the parameters of the nuclear instrument system change greatly, the nuclear power value display will change significantly in a short period of time during the parameter modification process, thereby triggering an alarm of a high power change rate. According to the present invention, the final nuclear instrument parameter is used as the final value, and a set of intermediate values ​​are calculated. During the parameter modification process, the intermediate value is modified first, and then the final value is modified. This can avoid the situation where the nuclear power display value changes beyond the limit value in a short period of time and then triggers a high power change rate alarm, thereby ensuring the safety of unit control.

[0059] Nuclear power plants are equipped with nuclear instrumentation systems to monitor the reactor core power online. The nuclear instrumentation system measures the neutrons leaking out of the pressure vessel through detectors arranged outside the pressure vessel, converts them into current values, and finally obtains the core power after correction calculation. Since the leaked neutrons are directly related to the core 15 nuclear reaction rate, the nuclear power has a fast response and is generally used as a reactor power protection signal. However, its disadvantage is that the display value error is large, so it needs to be regularly calibrated through a more accurate offline core power measurement result (reference power) during the operation of the unit.

[0060] During the operation of the reactor from initial criticality to full power, the neutron flux of the core 15 changes by about 11 orders of magnitude. In order to cover the measurement range of these 11 orders of magnitude, the nuclear instrument system uses three ranges of detectors, namely source range, intermediate range and power range, to cope with the monitoring of the core 15 under reactor shutdown, low power and high power levels. During normal power operation, the core power is mainly monitored through the power range. The power range has four measurement channels, which are arranged in the four quadrants of the core 15 as follows: Figure 1 As shown, each measurement channel is divided into four ionization chamber detectors to cover the axial height of the core 15. Figure 2 As shown, the four ionization chamber detectors are a first ionization chamber 10, a second ionization chamber 11, a third ionization chamber 12, and a fourth ionization chamber 13.

[0061] Each measurement channel of the power range collects the current values ​​of four detectors arranged axially, and calculates the nuclear power and axial power deviation according to the formula (the axial power deviation represents the degree of deviation of the power of the upper and lower parts of the core 15).

[0062] Pr=Gk×(K U ×I U +K L ×I L )

[0063] ΔI=α×(K U ×I U -K L ×I L )

[0064] in:

[0065] Pr is the nuclear power, ΔI is the axial power deviation; K U , K L , α and Gk are nuclear instrument system parameters; I U I is the average current value measured by the last two ionization chambers; L The average value of the current is measured for the next two ionization chambers.

[0066] During the normal operation of the reactor, in order to prevent uncontrollable changes in the core power due to equipment failure, a power change rate fast alarm is set in the off-core nuclear instrument system. When a measurement channel shows that the nuclear power value change rate exceeds 5% FP / 2s, the alarm is triggered. When two of the four measurement channels have alarms at the same time, the reactor emergency shutdown is triggered. During the normal operation of the reactor, when the nuclear power Pr indicates a deviation, the Gk parameter is adjusted to make the nuclear power Pr consistent with the reference power. However, the axial power deviation ΔI cannot be calibrated by the Gk parameter. Therefore, when the Gk value exceeds the range of (0.95, 1.05), the nuclear power Pr and the axial power deviation ΔI need to be calibrated through the xenon oscillation test. At this time, a more accurate nuclear instrument system parameter K will be obtained. U , K L and α, and set the Gk parameter to 1.

[0067] When designing the system, in order to prevent the power indication from changing too fast in a short time and generating a power change rate alarm when the Gk parameter is modified, a first-order filter is added to the Gk parameter. When the nuclear instrument system parameters are modified after the xenon oscillation test, due to the existence of the Gk parameter filter, there is a delay in the effectiveness of the Gk parameter. At the moment when the nuclear instrument parameters take effect, the nuclear power indication changes greatly in a short time, and the change rate exceeds 5% FP / 2s in a short time, thereby generating a power change rate alarm. Figure 3 shown.

[0068] Figure 4 FIG. 1 is a flow chart of an embodiment of a method for adjusting parameter data of a nuclear instrument system according to the present invention. Figure 4 As shown, the method for adjusting the parameter data of the nuclear instrument system includes the following steps:

[0069] S1: Obtain parameter data of the power range before modification, parameter data of the power range to be modified, and current data of the ionization chamber of the nuclear instrument, wherein the parameter data of the power range before modification at least includes the corrected nuclear power coefficient Gk0 before modification.

[0070] S2: Calculate the core power value before modification based on the parameter data and current data of the power range before modification.

[0071] S3: Obtain the instantaneous nuclear power value to be modified according to the modified nuclear power coefficient Gk0 before modification, the parameter data to be modified of the power range, and the current data.

[0072] It should be noted in the above embodiment that: by obtaining the parameter data before the modification of the power range, the parameter data to be modified of the power range and the measured ionization chamber current, the nuclear power values ​​before and after the modification are calculated and compared, the instantaneous nuclear power change after the modification is calculated, and it is determined whether the change is within the preset nuclear power deviation. If so, the intermediate parameter data is calculated, which effectively prevents the triggering of unnecessary power change rate fast alarm due to excessive deviation of short-term nuclear power indication caused by parameter modification.

[0073] Furthermore, obtaining the parameter data of the power range before modification also includes: the upper coefficient K of the power range before modification U,0 and the power range lower coefficient K before modification L,0 ; The parameter data to be modified for the power range includes: the upper coefficient K of the power range to be modified U,2 , Proposed to modify the power range lower coefficient K L,2 and the proposed modification of the nuclear power power coefficient Gk2; the current data of the nuclear instrument measured ionization chamber include: the upper current data I U , lower current data I L The details are shown in Table 1:

[0074]

[0075] Where Pr is the nuclear power, ΔI is the axial power deviation, G k , K U , K L and α are nuclear instrument system parameters.

[0076] Further, S2 includes: modifying the upper coefficient K of the power range before U,0 , Modification of the lower coefficient K of the power range before L,0 , before modification, the corrected nuclear power coefficient Gk0, the upper current data I U , lower current data I L Substitute the first preset formula to obtain the nuclear power value Pr0 before modification. The first preset formula is:

[0077] Pr0=Gk0×(K U,0 ×I U +K L,0 ×I L ).

[0078] According to the data in Table 1 and the first preset formula, the nuclear power value before modification can be calculated as Pr0=0.9500×(296978×0.00017542+319883×0.00016241). By calculating, Pr0 is equal to 98.8457% FP.

[0079] Further, S3 includes: modifying the nuclear power coefficient Gk0 before modification and the upper coefficient K of the power range to be modified U,2 , Proposed to modify the power range lower coefficient K L,2 , upper current data I U and the lower current data I L Substitute into the second preset formula to obtain the instantaneous nuclear power value Pr2 to be modified. The second preset formula is:

[0080] Pr2=Gk0×(K U,2 ×I U +K L,2 ×I L )

[0081] According to the data in Table 1 and the second preset formula, it can be calculated that Pr2=0.95000×(281287×0.00017542+300652×0.00016241). After calculation, Pr2 is equal to 93.2636% FP.

[0082] S4: Calculate the first nuclear power deviation based on the nuclear power value before modification and the instantaneous nuclear power value to be modified.

[0083] Specifically, the first core power deviation is equal to Pr2 minus Pr0, which is 93.2636-98.8457=-5.5821% FP.

[0084] S5: Determine the relationship between the first core power deviation and the preset core power deviation.

[0085] S6: If it is within the preset nuclear power deviation, a first set of intermediate parameter data is calculated according to the nuclear power value before modification, the instantaneous nuclear power value to be modified and the parameter data to be modified of the power range.

[0086] The specific preset nuclear power deviation is 5% FP-10% FP. Through the above calculation, the first nuclear power deviation is 5.5821% FP, which is within the preset nuclear power deviation range, and the first group of intermediate parameter data is calculated.

[0087] Furthermore, the first set of intermediate parameters includes: the first intermediate power range upper coefficient K U,1 , the first intermediate power range lower coefficient K L,1 And the first intermediate corrected nuclear power coefficient Gk1.

[0088] Further, S6 includes: if it is within the preset nuclear power deviation, the nuclear power value before modification Pr0 and the instantaneous nuclear power value to be modified Pr2 are brought into the third preset formula to obtain the first intermediate coefficient K; the first intermediate coefficient K is multiplied by the upper coefficient K of the power range to be modified U,2 Get the first intermediate power range upper coefficient K U,1 , KU,1 =K×K U,2 ; Multiply the first intermediate coefficient K by the lower coefficient K of the power range to be modified L,2 Get the first intermediate power range lower coefficient K L,1 , that is, K L,1 =K×K L,2 ; Divide the proposed modified nuclear power coefficient Gk2 by the first intermediate coefficient K to obtain the first intermediate modified nuclear power coefficient Gk1, that is, Gk1=Gk2÷K.

[0089] Furthermore, the third preset formula is:

[0090]

[0091] Among them, Pr0 is the nuclear power value before modification, Pr2' is the instantaneous nuclear power value to be modified, and K is the first intermediate coefficient.

[0092] K is calculated to be 1.0291% FP based on Pr2 equal to 93.2636 and Pr0 equal to 98.8457.

[0093] According to K U,1 =K×K U,2 , substitute the data and calculate K U,1 It is 289460% FP / A.

[0094] According to K L,1 =K×K L,2 , substitute the data and calculate K L,1 It is 309388% FP / A.

[0095] According to Gk1=Gk2÷K, substituting the data into the calculation, we get Gk1 as 0.9718.

[0096] At the same time, we can also calculate a1=a2÷K, and substitute the data to get a1 as 1.8857.

[0097] like Figure 5 As shown, compared with the original direct modification method using the intermediate value mentioned above, the nuclear power comparison trend is shown in the figure.

[0098] S7: using the first set of intermediate parameter data and the parameter data to be modified of the power range of the power range to adjust the nuclear power in sequence, so that the nuclear power deviation of each adjustment is within a safe range.

[0099] Further: the method also includes: S8: if it is greater than a preset nuclear power deviation, calculating a second set of intermediate parameter data and a third set of intermediate parameter data according to the nuclear power value before modification, the instantaneous nuclear power value to be modified and the parameter data to be modified of the power range.

[0100] S9: Use the second set of intermediate parameter data, the third set of intermediate parameter data and the parameter data to be modified of the power range to adjust the nuclear power in sequence, so that the nuclear power deviation of each adjustment is within a safe range.

[0101] It should be noted that if the value is greater than the range of 5% FP-10% FP, two groups of intermediate parameters need to be calculated, namely the second group of intermediate parameters and the third group of intermediate parameters.

[0102] Furthermore, the second set of intermediate parameter data includes: the second intermediate power range upper coefficient K U,1.1 , the second intermediate power range lower coefficient K L,1.1 , the second intermediate corrected nuclear power factor Gk 1.1 .

[0103] The third group of intermediate parameter data includes: the third intermediate power range upper coefficient K U,1.2 , the third intermediate power range lower coefficient K L,1.2 and the second intermediate corrected nuclear power factor Gk 1.2 .

[0104] Further: S8 includes if it is greater than the preset nuclear power deviation, bringing the nuclear power value before modification Pr0 and the instantaneous nuclear power value to be modified Pr2 into the fourth preset formula to obtain the second intermediate coefficient K1.

[0105] Multiply the second intermediate coefficient K1 by the upper coefficient K of the power range to be modified U,2 Get the upper coefficient K of the second intermediate power range U,1.1 That is, K U,1.1 =K1×K U,2 .

[0106] Multiply the second intermediate coefficient K1 by the lower coefficient K of the power range to be modified U,2 Get the second intermediate power range lower part K L,1.1 That is, K L,1.1 =K1×K L,2 .

[0107] Divide the proposed modified nuclear power coefficient Gk2 by the second intermediate coefficient K1 to obtain the second intermediate modified nuclear power coefficient Gk 1.1 That is, Gk 1.1 =Gk2÷K1.

[0108] The nuclear power value before modification Pr0 and the instantaneous nuclear power value to be modified Pr2 are substituted into the fifth preset formula to obtain the third intermediate coefficient K2.

[0109] Multiply the third intermediate coefficient K2 by the upper coefficient K of the power range to be modified U,2 Get the upper coefficient K of the second intermediate power range U,1.2 That is, KU,1.2 =K2×K U,2 .

[0110] Multiply the second intermediate coefficient K2 by the lower coefficient K of the power range to be modified L,2 Get the second intermediate power range lower coefficient K L,1.2 That is, K L,1.2 =K2×K L,2 .

[0111] The proposed modified nuclear power coefficient Gk2 is divided by the second intermediate coefficient K2 to obtain the second intermediate modified nuclear power coefficient Gk 1.2 That is, Gk 1.2 =Gk2÷K2.

[0112] The fourth preset formula is:

[0113]

[0114] Among them, K1 is the second intermediate coefficient, Pr0 is the nuclear power value before modification, and Pr2 is the instantaneous nuclear power value to be modified;

[0115] The fifth preset formula is:

[0116]

[0117] Among them, K2 is the third intermediate coefficient, Pr0 is the nuclear power value before modification, and Pr2 is the instantaneous nuclear power value to be modified.

[0118] The details are shown in Table 2:

[0119]

[0120] According to the data in Table 2 and the first preset formula, the nuclear power value before modification can be calculated as Pr0=0.9500×(311827×0.00017542+335877×0.00016241). By calculating, Pr0 is equal to 103.7880% FP.

[0121] According to the data in Table 2 and the second preset formula, it can be calculated that Pr2=0.95000×(281287×0.00017542+300652×0.00016241). After calculation, Pr2 is equal to 93.2636% FP.

[0122] K1 is calculated to be 1.0725 based on Pr2 equal to 93.2636% FP and Pr0 equal to 103.7880% FP.

[0123] According to K U,1.1 =K1×K U,2 , substitute the data and calculate K U,1.1It is 301681% FP / A.

[0124] According to K L,1.1 =K1×K L,2 , substitute the data and calculate K L,1.1 It is 322450% FP / A.

[0125] According to Gk 1.1 =Gk2÷K1, substitute the data to get Gk 1.1 It is 0.9324.

[0126] At the same time through α 1.1 =a2÷K1, substitute data a 1.1 It is 1.8093.

[0127] Specifically, K2 is calculated to be 1.0350 based on Pr2 being 93.2636% FP and Pr0 being 103.7880% FP.

[0128] According to K U,1.2 =K2×K U,2 , substitute the data and calculate K U,1.2 It is 291127% FP / A.

[0129] According to K L,1.2 =K2×K L,2 , substitute the data and calculate K L,1.2 It is 311170% FP / A.

[0130] According to Gk 1.2 =Gk2÷K2, substitute the data and calculate Gk 1.2 It is 0.9662.

[0131] At the same time through a 1.2 =a2÷K2. Substitute the data and calculate a 1.2 It is 1.8749.

[0132] It should be noted that rounding may occur in the above data calculation. This deviation is a normal phenomenon in the data processing process and is generally considered to be within an acceptable error range.

[0133] The method for adjusting parameter data of a nuclear instrument system of the present invention comprises the steps of: obtaining parameter data of a power range before modification, parameter data of the power range to be modified and current data of an ionization chamber of a nuclear instrument, wherein the parameter data of the power range before modification at least includes a corrected nuclear power coefficient Gk0 before modification, calculating a nuclear power value before modification and an instantaneous nuclear power value to be modified; then calculating a first nuclear power deviation; judging the relationship between the first nuclear power deviation and a preset nuclear power deviation; if the deviation is within the preset nuclear power deviation, calculating a first group of intermediate parameter data according to the nuclear power value before modification, the instantaneous nuclear power value to be modified and the parameter data of the power range to be modified; the first group of intermediate parameter data can prevent the triggering of an unnecessary power change rate fast alarm due to excessive deviation of a short-term nuclear power indication caused by parameter modification.

[0134] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A method for adjusting parameter data of a nuclear instrument system, characterized in that: include: S1: Acquire parameter data of the power range before modification, parameter data of the power range to be modified, and current data of the ionization chamber actually measured by the nuclear instrument, wherein the parameter data of the power range before modification at least includes the corrected nuclear power coefficient (Gk0) before modification; S2: Calculate the core power value before modification according to the parameter data of the power range before modification and the current data; S3: Obtaining the instantaneous nuclear power value to be modified according to the modified nuclear power coefficient (Gk0) before modification, the parameter data to be modified of the power range and the current data; S4: Calculating a first nuclear power deviation according to the nuclear power value before modification and the instantaneous nuclear power value to be modified; S5: Determine the relationship between the first core power deviation and a preset core power deviation; S6: If it is within the preset nuclear power deviation, a first set of intermediate parameter data is calculated according to the nuclear power value before modification, the instantaneous nuclear power value to be modified and the parameter data to be modified of the power range; S7: using the first set of intermediate parameter data and the parameter data to be modified of the power range of the power range to adjust the nuclear power in sequence, so that the nuclear power deviation of each adjustment is within a safe range.

2. The method for adjusting parameter data of a nuclear instrument system according to claim 1, characterized in that: The acquisition of the parameter data before the power range is modified also includes: the upper coefficient of the power range before modification (K U,0 ) and the power range lower coefficient before modification (K L,0 ); The parameter data to be modified for the power range includes: the upper coefficient of the power range to be modified (K U,2 ), it is proposed to modify the lower coefficient of the power range (K L,2 ) and the proposed revision of the revised nuclear power power factor (Gk2); The current data of the ionization chamber measured by the nuclear instrument includes: the upper current data (I U ), lower current data (I L ).

3. The method for adjusting parameter data of a nuclear instrument system according to claim 2, characterized in that: The S2 includes: modifying the upper power range coefficient (K U,0 ), the power range lower coefficient before modification (K L,0 ), the modified nuclear power coefficient before modification (Gk0), the upper current data (I U ), the lower current data (I L ) is brought into the first preset formula to obtain the nuclear power value before modification (Pr0); The first preset formula is: Pr0=Gk0×(K U,0 ×I U +K L,0 ×I L )。 4. The method for adjusting parameter data of a nuclear instrument system according to claim 2, characterized in that: The S3 includes: modifying the pre-modification corrected nuclear power coefficient (Gk0), the proposed modified power range upper coefficient (K U,2 ), the proposed modification of the power range lower coefficient (K L,2 ), the upper current data (I U ) and the lower current data (I L ) is substituted into the second preset formula to obtain the instantaneous nuclear power value to be modified (Pr2); The second preset formula is: Pr2=Gk0×(K U,2 ×I U +K L,2 ×I L )。 5. The method for adjusting parameter data of a nuclear instrument system according to claim 2, characterized in that: The set of intermediate parameters includes: a first intermediate power range upper coefficient (K U,1 ), the first intermediate power range lower coefficient (K L,1 ) and the first intermediate corrected nuclear power coefficient (Gk1).

6. The method for adjusting parameter data of a nuclear instrument system according to claim 5, characterized in that: The S6 includes: If it is within the preset nuclear power deviation, the nuclear power value before modification (Pr0) and the instantaneous nuclear power value to be modified (Pr2) are substituted into a third preset formula to obtain a first intermediate coefficient (K); The first intermediate coefficient (K) is multiplied by the upper coefficient (K U,2 ) to obtain the first intermediate power range upper coefficient (K U,1 ); The first intermediate coefficient (K) is multiplied by the lower coefficient (K L,2 ) to obtain the first intermediate power range lower coefficient (K L,1 ); The proposed modified nuclear power coefficient (Gk2) is divided by the first intermediate coefficient (K) to obtain the first intermediate modified nuclear power coefficient (Gk1).

7. The method for adjusting parameter data of a nuclear instrument system according to claim 6, characterized in that: The third preset formula is: Among them, Pr0 is the nuclear power value before modification, Pr2 is the instantaneous nuclear power value to be modified, and K is the first intermediate coefficient.

8. The method for adjusting parameter data of a nuclear instrument system according to claim 1, characterized in that: The method further comprises: S8: If it is greater than the preset core power deviation, calculating a second set of intermediate parameter data and a third set of intermediate parameter data according to the core power value before modification, the instantaneous core power value to be modified and the parameter data to be modified of the power range; S9: Use the second set of intermediate parameter data, the third set of intermediate parameter data and the parameter data to be modified of the power range to adjust the nuclear power in sequence, so that the nuclear power deviation of each adjustment is within a safe range.

9. The method for adjusting parameter data of a nuclear instrument system according to claim 8, characterized in that: The second set of intermediate parameter data includes: a second intermediate power range upper coefficient (K U,1.1 ), the second intermediate power range lower coefficient (K L,1.1 ), the second intermediate corrected nuclear power factor (Gk 1.1 ); The third group of intermediate parameter data includes: the third intermediate power range upper coefficient (K U,1.2 ), the third intermediate power range lower coefficient (K L,1.2 ) and the second intermediate corrected nuclear power factor (Gk 1.2 ).

10. The method for adjusting parameter data of a nuclear instrument system according to claim 9, characterized in that: The step S8 includes, if it is greater than the preset nuclear power deviation, substituting the nuclear power value before modification (Pr0) and the instantaneous nuclear power value to be modified (Pr2) into a fourth preset formula to obtain the second intermediate coefficient (K1); The second intermediate coefficient (K1) is multiplied by the upper coefficient (K U,2 ) to obtain the second intermediate power range upper coefficient (K U,1.1 ); The second intermediate coefficient (K1) is multiplied by the lower coefficient (K L,2 ) to obtain the second intermediate power range lower coefficient (K L,1.1 ); The proposed modified nuclear power factor (Gk2) is divided by the second intermediate factor (K1) to obtain the second intermediate modified nuclear power factor (Gk 1.1 ); Substituting the nuclear power value before modification (Pr0) and the instantaneous nuclear power value to be modified (Pr2) into the fifth preset formula to obtain the third intermediate coefficient (K2); The third intermediate coefficient (K2) is multiplied by the upper coefficient (K U,2 ) to obtain the second intermediate power range upper coefficient (K U,1.2 ); The second intermediate coefficient (K2) is multiplied by the lower coefficient (K L,2 ) to obtain the second intermediate power range lower coefficient (K L,1.2 ); The proposed modified nuclear power factor (Gk2) is divided by the second intermediate factor (K2) to obtain the second intermediate modified nuclear power factor (Gk 1.2 ); The fourth preset formula is: Wherein, K1 is the second intermediate coefficient, Pr0 is the nuclear power value before modification, and Pr2 is the instantaneous nuclear power value to be modified; The fifth preset formula is: Among them, K2 is the third intermediate coefficient, Pr0 is the nuclear power value before the modification, and Pr2 is the instantaneous nuclear power value to be modified.

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