Method and device for calculating background current of dynamic rod carving test of pressurized water reactor

Abstract

The invention provides a method and a device for calculating background current of a dynamic rod carving test of a pressurized water reactor, and the method comprises the following steps: during the dynamic rod carving test, after a first control rod group is carved, immediately lifting the first control rod group to the top of the reactor; performing exponential fitting on the power range current and time 100s + / -20s before the Doppler heating point is reached so as to solve and obtain omega and a; performing linear fitting on the power range current and time t when the first control rod group is lifted to the reactor top power range current which just starts to rise for 100s + / -20s so as to solve Ib, 1 and b; and S5, substituting Ib, 0 = Ib, 1 into a formula II for exponential fitting, repeating the step S4 and the step S5, and when Ib, 0 and Ib, 1 are the same, confirming that Ib, 1 at the moment is the real background current. According to the method, the background current is obtained through iterative solution by using the two sections of data close to the Doppler heating point interval and the background current interval, so that the technical problem that the economy of a nuclear power unit is affected due to the fact that an existing background current measurement method needs waiting time and occupies an overhaul main line is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of reactor physics of pressurized water reactor nuclear power plants, and particularly relates to a method for calculating background current of dynamic rod marking test of pressurized water reactor and a device thereof. BACKGROUND

[0002] In the process of reactivity measurement of dynamic rod marking test of pressurized water reactor nuclear power plants, the main sources of background current of power range detector of ex-core nuclear instrumentation system include: detector background noise, noise generated by circuit and current generated by neutrons. The background current will have an influence on reactivity measurement that cannot be ignored. Therefore, in the dynamic rod marking test of pressurized water reactor unit, the background current must be used to correct the reactivity.

[0003] There are two methods for measuring the existing main background current: Method one: the maximum or second largest value control rod bank is inserted into the bottom of the reactor to wait for 30 minutes, and the background current is measured after the power range detector current is stable; Method two: the maximum or second largest value control rod bank is inserted into the bottom of the reactor to wait for 5 minutes, and the background current is calculated by linear fitting.

[0004] At present, method one has been applied in engineering, and method two has not been applied in engineering. Both of the two methods need waiting time, occupy the main line of overhaul, and affect the economy of nuclear power unit. SUMMARY

[0005] Therefore, the application provides a method for calculating background current of dynamic rod marking test of pressurized water reactor and a device thereof, which solves the technical problem that the existing background current measurement method affects the economy of nuclear power unit due to the need for waiting time and the occupation of the main line of overhaul by using two segments of data close to the Doppler heating point interval and close to the background current interval to iteratively solve the background current.

[0006] The first aspect of the application provides a method for calculating background current of dynamic rod marking test of pressurized water reactor, which comprises steps S1 to S6.

[0007] Step S1, during the dynamic rod marking test, immediately lift the first set of control rod banks to the top of the reactor after marking the first set of control rod banks.

[0008] Step S2, after the first set of control rod banks is lifted to the top of the reactor, record the relationship between the power range current of the ex-core nuclear instrumentation system and the time in the process that the power range current of the ex-core nuclear instrumentation system increases to the Doppler heating point when the first set of control rod banks is in the top state.

[0009] Step S3, during the dynamic rod marking test, calculate R(t) according to formula one, R(t) is the theoretical proportion of the first exponential term relative to the total neutron flux density at time t, Equation One.

[0010] In Equation One, A1, A2, ……A7 are constants determined according to initial conditions of the nuclear power unit, and ω1, ω2, ……ω7 are seven roots of the reactivity equation.

[0011] Step S4, take the power range current in the 100s±20s before reaching the Doppler hot spot and time t, and perform exponential fitting according to Equation Two to obtain ω and a. In the first exponential fitting, let I b,0 =0.

[0012] Equation Two.

[0013] Step S5, take the power range current in the 100s±20s when the first group of control rods is lifted to the top of the reactor and the power range current just starts to rise and time t, and perform linear fitting according to Equation Three combined with the ω obtained in Step S4 to obtain I b,1 and b.

[0014] Equation Three.

[0015] Step S6, let I b,0 =I b,1 , and perform exponential fitting according to Equation Two, repeat Step S4 and Step S5, when I b,0 and I b,1 are the same, then the I b,1 at this time is the true background current.

[0016] In one specific embodiment of the present application, before Step S3, Steps S21 to S24 are further included.

[0017] Step S21, according to the theoretical reactivity ρ, the share of the i-th group of delayed neutrons , the decay constant of the i-th group of delayed neutrons and the prompt neutron lifetime , calculate ω1, ω2, ……ω7 through the reactivity equation .

[0018] Step S22, determine A1, A2, ……A7 according to the initial conditions of the nuclear power unit.

[0019] Step S23, according to ω1, ω2, ……ω7, and A1, A2, ……A7, obtain the neutron flux density n(t). , n0 is a constant.

[0020] Step S24, R(t) is solved according to the neutron flux density n(t).

[0021] In one embodiment of the present application, after step S6, the method for calculating the background current of the dynamic rod test of the pressurized water reactor further comprises step S7.

[0022] Step S7, the measured power range current is corrected by the background current, and the control rod value of each group is calculated.

[0023] The second aspect of the present application provides a device for calculating the background current of the dynamic rod test of the pressurized water reactor, which comprises a control module, a recording module, a calculation module, a fitting module and a confirmation module. The control module is used to execute step S1. The recording module is used to execute step S2. The calculation module is used to execute step S3. The fitting module is used to execute step S4 and step S5. The confirmation module is used to execute step S6.

[0024] The third aspect of the present application provides a computer device, which comprises a processor and a memory. The processor is used to execute the method for calculating the background current of the dynamic rod test of the pressurized water reactor according to the first aspect of the present application. The memory is used to store executable instructions of the processor.

[0025] The fourth aspect of the present application provides a computer readable storage medium, which stores executable instructions of the computer. The executable instructions are executed by the processor to realize the method for calculating the background current of the dynamic rod test of the pressurized water reactor according to the first aspect of the present application.

[0026] The fifth aspect of the present application provides a computer program product, which comprises computer programs / instructions. The computer programs / instructions are executed by the processor to realize the method for calculating the background current of the dynamic rod test of the pressurized water reactor according to the first aspect of the present application.

[0027] The beneficial effects of the technical scheme of the present application are as follows: when the positive reactivity is introduced, according to the principle that the exponential growth law of the first exponential term which dominates in the neutron flux density after the background current correction is unchanged, the background current is iteratively solved by using the data of the two sections close to the Doppler heating point interval and close to the background current interval. The method for calculating the background current of the dynamic rod test of the pressurized water reactor is not related to the specific multiplication period size, the unit type and the cycle, and has universality. In addition, compared with the existing engineering application method, the method provided in the embodiments of the present application does not need to occupy the main line time of the overhaul, and can effectively shorten the main line time of the pressurized water reactor nuclear power unit overhaul by 40 minutes (30 minutes of waiting + 10 minutes of rising neutron flux), for example, for a million kilowatt unit, the power generation capacity can be increased by about 660,000 degrees per unit per cycle, which has good economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1A flowchart of a method for calculating a background current of a dynamic rod worth test of a pressurized water reactor is shown.

[0029] Figure 2 A trend graph of R(t) is shown.

[0030] Figure 3 An exponential fitting graph is shown.

[0031] Figure 4 A linear fitting graph is shown. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0033] At least one embodiment of the present application provides a method for calculating a background current of a dynamic rod worth test of a pressurized water reactor, which comprises the following steps.

[0034] Step S1, during the dynamic rod worth test, immediately lift the first control rod group to the top of the reactor after the first control rod group is engraved.

[0035] Step S2, after the first control rod group is lifted to the top of the reactor, record the relationship between the power range current of the ex-core nuclear measurement system and the time in the process that the power range current of the ex-core nuclear measurement system in the ARO state of the first control rod group increases to the Doppler heating point.

[0036] It should be noted that the first control rod group refers to the control rod group with the maximum or second largest value. The relationship between the power range current of the ex-core nuclear measurement system and the time in the process that the power range current of the ex-core nuclear measurement system in the ARO state of the first control rod group increases to the Doppler heating point can also be referred to as the data of the increase of the ex-core nuclear measurement system power range current (i.e. neutron flux density) to the Doppler heating point. After the first control rod group is lifted to the top of the reactor, about 60pcm is introduced.

[0037] Step S3, during the dynamic rod worth test, R(t) is calculated according to Formula One, R(t) is the theoretical proportion of the first exponential term relative to the total neutron flux density at time t, Formula One.

[0038] In formula one, A1, A2, ……A7 are constants determined according to the initial conditions of the nuclear power unit, and ω1, ω2, ……ω7 are seven roots of the reactivity equation.

[0039] Specifically, according to the dynamic equation of the point reactor model, n(t) has seven exponential terms, of which the first exponential term is dominant. Let R(t) be the theoretical proportion of the first exponential term relative to the total neutron flux density at time t, and solve R(t).

[0040] Step S4: Take the power range current in the 100s±20s period before reaching the Doppler hot spot and time t, and perform exponential fitting according to formula two to obtain ω and a. In the first exponential fitting, let I b,0 =0.

[0041] Formula two.

[0042] It should be noted that the power range current in the 100s±20s period before reaching the Doppler hot spot is generally two orders of magnitude larger than the background current, and the influence of the background current is small. Based on this, in the first exponential fitting, let I b,0 =0.

[0043] Step S5: Take the power range current in the 100s±20s period when the first group of control rods is lifted to the top of the reactor and the power range current starts to rise and time t, and perform linear fitting according to formula three combined with the ω obtained in step S4 to obtain I b,1 and b.

[0044] Formula three.

[0045] It should be noted that the power range current in the 100s±5s period when the first group of control rods is lifted to the top of the reactor and the power range current starts to rise is affected by the background current and cannot be ignored, and the time from the start of the power range current is short. Therefore, the power range current change formula is shown in formula (1).

[0046] Formula (1).

[0047] Formula (1) is transformed to obtain formula three, R(t) is calculated by step S3, and ω is obtained by step S4. According to formula three, perform linear fitting, let be the Y term, be the X term, and I b,1 and b can be solved.

[0048] Step S6: Let I b,0 =I b,1The offspring is introduced into Formula Two for exponential fitting, and steps S4 and S5 are repeated, when I b,0 and I b,1 are the same, it is confirmed that I b,1 at this time is the real background current.

[0049] According to the technical scheme provided by the embodiment of the application, when the positive reactivity is introduced, according to the principle that the exponential growth rule of the first exponential term which dominates in the background current corrected neutron flux density is unchanged, the background current is obtained by iterative solution using two data segments close to the Doppler heating point interval and close to the background current interval. The method for calculating the background current of the dynamic rod test of the pressurized water reactor is not related to the specific multiplication period size, the unit type and the cycle, and has universality. In addition, compared with the existing engineering application method, the method provided by the embodiment of the application does not need to occupy the main line time of the overhaul, and can effectively shorten the main line time of the overhaul of the pressurized water reactor nuclear power unit by 40 minutes (30 minutes of waiting + 10 minutes of rising neutron flux), and for a million kilowatt unit, the power generation capacity can be increased by about 660,000 degrees per unit per cycle, and has good economic benefits.

[0050] In at least one embodiment of the application, steps S21 to S24 are further included before step S3.

[0051] Step S21, according to the theoretical reactivity p, the share of the i-th group of delayed neutrons , the decay constant of the i-th group of delayed neutrons and the prompt neutron lifetime , ω1, ω2, … ω7 are calculated by the reactivity equation, and the reactivity equation is .

[0052] Specifically, the reactivity equation is obtained according to Formula (2) and Formula (3) of the point reactor model dynamic equation.

[0053] Formula (2).

[0054] Formula (3).

[0055] In Formula (2) and Formula (3), p(t) is the reactivity at time t; is the total share of delayed neutrons; is the concentration of the i-th group of delayed neutron precursors at time t; is the neutron generation time.

[0056] Step S22, A1, A2, … A7 are determined according to the initial conditions of the nuclear power unit.

[0057] Step S23, according to ω1, ω2, …… ω7 and A1, A2, …… A7, the neutron flux density n(t) is solved. , n0 is a constant.

[0058] It should be noted that n0 is equal to the neutron flux density at t=0.

[0059] Step S24, according to the neutron flux density n(t), R(t) is solved.

[0060] In at least one embodiment of the present application, after step S6, the method for calculating the background current of the dynamic rod test of the pressurized water reactor further comprises step S7.

[0061] Step S7, the measured power range current is corrected by the background current, and the control rod value of each group is calculated.

[0062] The background current calculated by the method for calculating the background current of the dynamic rod test of the pressurized water reactor provided by the embodiments of the present application is verified and compared by multi-unit and multi-cycle dynamic rod test data, and the precision is basically the same as that of the traditional method, which proves that the obtained background current can be applied to the unit, and the test results all meet the acceptance criteria.

[0063] Hereinafter, a method for calculating a background current of a dynamic rod test of a pressurized water reactor provided by an embodiment of the present application will be described with reference to specific embodiments.

[0064] Embodiment 1: Taking a unit of a certain nuclear power plant as an example 1. During the dynamic rod test, after the first group of control rods is lifted to the top of the reactor (ARO) state, the power range current of the ex-core nuclear measurement system rises to the data of the Doppler heating point (corresponding to steps S1 and S2); 2. According to the theoretical control rod value, the delayed neutron parameter and the prompt neutron lifetime, ω1, ω2, …… ω7 are calculated by the reactivity equation (corresponding to step S21), and then A1, A2, …… A7 are determined by the initial condition (corresponding to step S22). In this way, the undetermined constants of R(t) can be determined, and the change trend is as shown in Figure 2 According to formula one, R(t) is calculated (corresponding to step S3).

[0065] Among them: 3. Take the power range current and time of about 100s before reaching the Doppler heating point, and perform exponential fitting according to formula two (corresponding to step S4), as shown in Figure 3 Among them, ω=0.011571, a=2.8047E-12.

[0066] The first group of control rods to the top of the pile after the power range current just started to rise around 100s of data. According to formula three linear fitting (corresponding to step S5), as shown in Figure 4 I b，1 =4.6760×10 -10 A, b = 2.2210E-12.

[0067] I b,0 =I b,1 =4.6760×10 -10 A into the formula two exponential fitting, re-solved to get ω and a, and then according to formula three linear fitting to get new I b,1 and b. When the new I b,1 with I b,0 , then confirm the I b,1 at this time is the true background current (corresponding to step S6). The true background current I b,1 =4.68×10 - 10 A, and the current engineering application method to measure the background current, as shown in Table 1.

[0068] Table 1 Comparison of the background current calculated by the method of the present application and the background current measured by the current engineering application method 6, the background current correction measured power range current, and calculate the value of each group of control rods, the results are shown in Table 2.

[0069] Table 2 Comparison of the background and the control rod value calculated by the method of the present application and the background and the control rod value calculated by the current engineering application method From the above data analysis shows that the method of the present application to calculate the background current and the background current measured by the current engineering application method is basically the same, the relative deviation is only -1.06%, the calculated rod value and the design value relative deviation meet the acceptance criteria, and the maximum relative deviation of the rod value calculated by the current engineering application method is only -2.68%. Therefore, the background current calculated by the method of the present application is reliable, and the precision meets the requirements of practical engineering application.

[0070] The device for calculating the background current of the dynamic rod test of the pressurized water reactor comprises a control module, a recording module, a calculation module, a fitting module and a confirmation module. The control module is used for performing step S1. The recording module is used for performing step S2. The calculation module is used for performing step S3. The fitting module is used for performing steps S4 and S5. The confirmation module is used for performing step S6.

[0071] Step S1, when the control module is used for the dynamic rod test, the first group of control rods is immediately lifted to the top of the reactor after the first group of control rods is completed.

[0072] Step S2, after the first group of control rods is lifted to the top of the reactor, the relationship between the power range current of the out-of-core nuclear measurement system and the time in the process that the power range current of the out-of-core nuclear measurement system increases to the Doppler hot spot is recorded.

[0073] Step S3, during the dynamic rod test, R(t) is calculated according to formula one, R(t) is the theoretical proportion of the first exponential term relative to the total neutron flux density at t, Formula one.

[0074] In formula one, A1, A2, …… A7 are constants determined according to the initial conditions of the nuclear power unit, and ω1, ω2, …… ω7 are seven roots of the reactivity equation.

[0075] Step S4, the power range current and the time t of 100s±20s before reaching the Doppler hot spot are taken , and exponential fitting is performed according to formula two to obtain ω and a. When performing the exponential fitting for the first time, I b,0 =0.

[0076] Formula two.

[0077] Step S5, the power range current and the time t of 100s±20s when the power range current of the first group of control rods begins to rise after being lifted to the top of the reactor are taken , linear fitting is performed according to formula three in combination with ω obtained in step S4, so as to obtain I b,1 and b.

[0078] Formula three.

[0079] Step S6, I b,0 =I b,1 is taken, and exponential fitting is performed according to formula two, steps S4 and S5 are repeated, when I b,0 and I b,1 are the same, I b,1The true background current.

[0080] The computer device includes a processor and a memory. The processor is configured to execute a method for calculating a background current of a dynamic rod test of a pressurized water reactor according to any one of the embodiments of the present application. The memory is configured to store executable instructions of the processor, such as an application program. The number of processors can be one or more. The application program stored in the memory can include one or more than one module each corresponding to a set of instructions. In addition, the processor is configured to execute the instructions to perform the method for calculating the background current of the dynamic rod test of the pressurized water reactor.

[0081] The computer device can further include a power supply component configured to manage power supply of the computer device, a wired or wireless network interface configured to connect the computer device to a network, and an input / output (I / O) interface. The computer device can operate based on an operating system stored in the memory, such as Windows Server TM , Mac OSX TM , Unix TM , Linux TM , FreeBSD TM or the like.

[0082] The computer device can further include a power supply component configured to manage power supply of the computer device, a wired or wireless network interface configured to connect the computer device to a network, and an input / output (I / O) interface. The computer device can operate based on an operating system stored in the memory, such as Windows Server TM , Mac OSX TM , Unix TM , Linux TM , FreeBSD TM or the like.

[0083] A non-transitory computer readable storage medium, when the instructions in the storage medium are executed by the processor of the computer device, enable the computer device to perform the method for calculating the background current of the dynamic rod test of the pressurized water reactor. The method for calculating the background current of the dynamic rod test of the pressurized water reactor is executed by an agent program.

[0084] Those skilled in the art can appreciate that the algorithm steps of the examples described in conjunction with the embodiments disclosed in the present application can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0085] The computer device includes a processor and a memory. The processor is configured to execute a method for calculating a background current of a dynamic rod test of a pressurized water reactor according to any one of the embodiments of the present application. The memory is configured to store executable instructions of the processor, such as an application program. The number of processors can be one or more. The application program stored in the memory can include one or more than one module each corresponding to a set of instructions. In addition, the processor is configured to execute the instructions to perform the method for calculating the background current of the dynamic rod test of the pressurized water reactor.

[0086] The above functions are realized in the form of software function units and sold or used as independent products, and can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a computer program product stored in a storage medium, including a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method for calculating the dynamic rod test background current of a pressurized water reactor. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0087] It should be noted that the combination of various technical features in the embodiments of the present application is not limited to the combination described in the embodiments of the present application or the combination described in the specific embodiments. All the technical features described in the present application can be freely combined or combined, unless contradictory.

[0088] As shown in the present application and claims, unless the context clearly indicates otherwise, "one", "a", and / or "the" do not refer to the singular, but can also include the plural. Generally, the term "comprising" only indicates that the steps and elements explicitly identified are included, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0089] The above is only a preferred embodiment of the present application and does not limit the present application. Any modification, equivalent replacement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method of calculating a background current for a dynamic rod test of a pressurized water reactor, characterized by, Comprising: Step S1, during the dynamic rod test, immediately after the first control rod bank is completed, the first control rod bank is lifted to the top of the reactor; Step S2, after the first control rod bank is lifted to the top of the reactor, the relationship between the power range current of the ex-core nuclear measurement system and the time during which the power range current of the ex-core nuclear measurement system increases to the Doppler heat point in the state of the first control rod bank at the top of the reactor is recorded; Step S3, during the dynamic rod test, R(t) is calculated according to Formula One, R(t) is the theoretical proportion of the first exponential term relative to the total neutron flux density at t, Formula One, In Formula One, A1, A2, ……A7 are constants determined according to the initial conditions of the nuclear power unit, and ω1, ω2, ……ω7 are seven roots of the reactivity equation; Step S4, take the power range current 100s ± 20s before reaching the Doppler hot spot and time t, exponential fitting according to formula two, to solve ω and a, the first time exponential fitting, let I b,0 =0, Formula Two; Step S5, take the first group of control rods to the top of the power range of the current group to enhance the current just start to rise 100s ± 20s power range of the current and time t, according to the formula three combination step S4 to solve the ω linear fitting, to solve I b,1 and b, Formula Three; Step S6, let I b,0 = I b,1 Substitute the offspring into equation two for exponential fitting, repeat step S4 and step S5, when I b,0 and I b,1 are the same, then confirm that I b,1 at this time is the real background current.

2. The method of claim 1, wherein, Before step S3, further comprising: Step S21, calculating ω1, ω2, … ω7 from the theoretical reactivity ρ, the fraction of the ith group delayed neutrons , the decay constant of the ith group delayed neutrons , and the prompt neutron lifetime , by the reactivity equation ; Step S22, determining A1, A2, ……A7 according to the initial conditions of the nuclear power unit; Step S23, according to ω1, ω2, …… ω7, and A1, A2, …… A7, the neutron flux density n(t) is solved, n0 is a constant; Step S24, solving R(t) according to the neutron flux density n(t).

3. The method of claim 1, wherein, After step S6, further comprising: Step S7, correcting the measured power range current by the background current, and calculating the value of each control rod.

4. An apparatus for calculating a background current of a dynamic rod worth test of a pressurized water reactor, characterized by, The control module is used to execute step S1, the recording module is used to execute step S2, the calculation module is used to execute step S3, the fitting module is used to execute step S4 and step S5, and the confirmation module is used to execute step S6, Step S1, during the dynamic rod test, immediately after the first control rod bank is completed, the first control rod bank is lifted to the top of the reactor; Step S2, after the first control rod bank is lifted to the top of the reactor, the relationship between the power range current of the ex-core nuclear measurement system and the time during which the power range current of the ex-core nuclear measurement system increases to the Doppler heat point in the state of the first control rod bank at the top of the reactor is recorded; Step S3, during the dynamic rod test, R(t) is calculated according to Formula One, R(t) is the theoretical proportion of the first exponential term relative to the total neutron flux density at t, Formula One, In Formula One, A1, A2, ……A7 are constants determined according to the initial conditions of the nuclear power unit, and ω1, ω2, ……ω7 are seven roots of the reactivity equation; Step S4, take the power range current 100s ± 20s before reaching the Doppler hot spot and time t, exponential fitting according to formula two, to solve ω and a, the first time exponential fitting, let I b,0 =0, Formula Two; Step S5, take the first group of control rods to the top of the power range of the current group to enhance the current just start to rise 100s ± 20s power range of the current and time t, according to the formula three combination step S4 to solve the ω linear fitting, to solve I b,1 and b, Formula Three; Step S6, let I b,0 = I b,1 Substitute the offspring into equation two for exponential fitting, repeat step S4 and step S5, when I b,0 and I b,1 are the same, then confirm that I b,1 at this time is the true background current.

5. A computer apparatus, characterized by Comprising: A processor for executing the method for calculating the background current of the dynamic rod test of the pressurized water reactor according to any one of claims 1 to 3; And A memory for storing executable instructions of the processor.

6. A computer readable storage medium having stored thereon executable instructions of a computer, characterized in that, The executable instructions are executed by the processor to implement the method for calculating the background current of the dynamic rod test of the pressurized water reactor according to any one of claims 1 to 3.

7. A computer program product comprising computer programs / instructions, characterized in that, The computer program / instructions are executed by the processor to implement the method for calculating the background current of the dynamic rod test of the pressurized water reactor according to any one of claims 1 to 3.

Images