KR101561829B1 - Data accuracy improved flx program for calculating power of heavy water reactor - Google Patents

Abstract

The present invention relates to a recording medium storing a computer program for calculating an output of a nuclear power plant using a heavy water reactor. According to the present invention, a method includes the steps of: (a) storing an integer value of vanadium detector data to first register; (b) a decimal value of the vanadium detector data to a second register; (c) determining whether to round off the decimal value stored in the second register; (d) adding one bit to the binary code of the integer value stored in the first register when the decimal value is rounded off according to the determination result of a determining unit; (e) determining whether an overflow to the top-level binary code occurs when the single bit is added; and (f) removing and correcting the overflow when such overflow occurs. The present invention corrects the overflow of the vanadium detector data to correct an error occurring in a heavy water reactor control signal, thereby improving the reliability of the computer program.

Description

Technical Field [0001] The present invention relates to a computer program recording medium for calculating an output of a nuclear power plant having improved reliability,

The present invention relates to a recording medium on which a computer program for calculating the output of a heavy water reactor is recorded, and more particularly to a recording medium on which a computer program having improved reliability of data for heavy water control is recorded.

The FLX program can be used as a computational program to calculate the output of a nuclear water reactor in a reactor control system. (FLX program) The FLX program calculates the neutron flux (Flux Power) of 14 areas using the vanadium detector signal distributed in 14 areas.

On the other hand, the detector for stopping the heavy water channel has an operating margin of about 10% to 12% at a full power of 100%. However, due to aging deterioration of facilities, the operation margin is gradually reduced, and in severe cases, the output of the reactor must be continuously reduced.

The vanadium detector has been found to have an average life span of about 10 years. Conventionally, vanadium detectors have been nearing the end of their lifetime and are experiencing failures. In this case, the conventional Walsh 1, 2, 3 and 4 FLX programs have a problem of generating an error in calculating the neutron flux output.

More specifically, in the process of calculating the neutron flux output by the FLX program, an overflow occurs in the value of the vanadium detector data, which causes a sudden conversion from a positive (+) value to a negative (-) value.

In this case, the output of the control signal was incorrectly indicated due to an error in the vanadium detector data value calculated by the FLX program. In July 2003, the continuous output discharge phenomenon occurred in Wolsong 1 of Korea Hydro & Nuclear Power Co., There was a crisis of power generation stoppage in the exhalation.

In the past, CANDU Energy, the designer of Wolsong Nuclear Power Plant, had the technology for calculating the correction factor for the control of the water quality control, but the reliability of the computer program to calculate the output of the water power plant was not secured There is a problem.

In addition, there is a problem in reliability of the FLX program for calculating the output of the heavy water reactor nuclear power plant, which causes problems such as power output of the nuclear power plant, generation stoppage, and the like.

In addition, when the technical support service is requested from the Canadian Atomic Energy Corporation (AECL) for solving the above problem, a cost of about one billion is consumed, which causes a great economic loss.

The related art related to the above problem has not been found, and Korean Patent No. 10-1146948 discloses a technique for measuring the degree of reactivity of the control system in the liquid-to-medium water region by using the neutron detection signal.

Therefore, it is an object of the present invention to secure the reliability of the output signal for the heavy water control by correcting the error of the computer program for calculating the output of the heavy water reactor.

According to an aspect of the present invention, there is provided a computer program for calculating an output of a heavy water reactor using data of a vanadium detector, comprising: (a) storing an integer value of vanadium detector data in a first register; (b) storing the decimal value of vanadium detector data in a second register; (c) determining whether the prime number stored in the second register is rounded; (d) adding 1 bit to the binary code of the integer value stored in the first register at the rounding of the decimal value as a result of the determination by the determination unit; (e) if one bit is added, determining whether overflow occurs in the highest binary code of the integer value; And (f) if an overflow occurs, removing the overflow and correcting the overflow.

Advantageously, the present invention provides a method for detecting vanadium in a semiconductor device, said method comprising the steps of: (g) combining said corrected integer value and said decimal value to produce corrected vanadium detector data; And (h) transforming the output scale of the heavy water reactor by multiplying the corrected vanadium detector data by a scale variable.

According to the present invention, the overflow phenomenon of the vanadium detector data is corrected to solve the error generated in the output signal for the heavy water control, thereby improving the reliability of the computer program.

Further, the present invention has an advantage in that safety and stability of the nuclear power plant are improved by improving the reliability in calculation of the output of the heavy water reactor nuclear power plant. In addition, the present invention has the advantage of reducing the cost used for technical support of nuclear power plants.

1 shows a computational program algorithm for computing the output of a heavy water nuclear reactor according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to or limited by the exemplary embodiments. Like reference numerals in the drawings denote members performing substantially the same function.

For a program that calculates the output of a heavy water reactor, the numerical representation method is as shown in [Table 1] below. Referring to Table 1, when the final value exceeds the maximum value that can be expressed in the computer program, an overflow occurs at the most significant bit indicating the sign.

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 One 0 Binary method One One One One One One One One One One One One One One One Octal 077777 7 7 7 7 7 Binary method negative One 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Decimal notation -32768 One 0 0 0 0 0

As shown in Table 1, bit 15 indicates a sign bit in a computer program using 16 bits. When bit 15 is 1, it is negative. When bit 15 is 0, it is positive. If bits 0 to 14 are all 1, the maximum value is 01111 ... (Omitted) converted to decimal is 32767.

However, if 1 is added to this value in the rounding process, it will eventually exceed the allowable value range, and the overflow will occur at bit 15, which is the most significant bit. In this case, an error occurs in which the maximum value changes to the minimum value due to the overflow.

Therefore, the embodiment according to the present invention divides and stores an integer value and a decimal value of data in order to solve an error occurring at a design limit of a program for calculating the output of a heavy water reactor (hereinafter referred to as FLX program) And determines whether the overflow of the overflow occurs.

1 shows an FLX program algorithm according to an embodiment of the present invention. Referring to FIG. 1, an algorithm of a computer program for calculating the output of a heavy water reactor includes the steps of: (a) storing (S201) an integer value of the vanadium detector data 10 in a first register; (b) storing the decimal value of the vanadium detector data 10 in a second register (S202); (c) determining whether the prime number stored in the second register is rounded off (S203); (d) adding (S205) 1 bit to the binary code of the integer value stored in the first register at the rounding of the decimal value as a result of the judgment of step (S203); (e) if one bit is added, determining whether overflow occurs in the highest binary code of the integer value (S206); And (f) if an overflow occurs, removing the overflow and correcting (S207).

(G) generating (S208) vanadium detector data corrected by adding the corrected integer value and the decimal value; And (h) converting the output scale of the heavy water reactor nuclear power plant by multiplying the corrected vanadium detector data by a scale variable (S209).

The FLX program is an algorithm that calculates the output value of the heavy water reactor by matrix-calculating the data (10) of the vanadium detector stored in the memory. However, it is preferable to divide the vanadium detector data 10 stored in the memory into an integer value and a decimal value to store the output value of the heavy water reactor in the register in order to solve the above-mentioned overflow error.

Accordingly, in step (a) (S201), a value corresponding to an integer when converting the vanadium detector data 10 into a decimal number is stored in the first register. (b) In step S202, a value corresponding to a prime number is stored in the second register when converting the vanadium detector data 10 into decimal numbers. Thus, it is possible to determine whether or not rounding is performed on the decimal value causing overflow.

(c) In step S203, binary codes of decimal values stored in the second register are analyzed to determine whether the rounding is performed. In this embodiment, if the most significant bit of the decimal binary code is 1, it means that the value is more than half of the representable decimal value, so it can be determined that rounding is required.

(d) In step S205, if it is determined in step S203 that rounding should be performed, a step of adding 1 bit to the integer value stored in the first register is performed, and in step (e) S206 ). If rounding is not necessary, the process may proceed to step (g) S208, which will be described later.

(e) Step S206 performs a process of determining whether overflow occurs in the most significant binary code of the integer value when 1 bit is added. In the present embodiment, (d) in the FLX program using 16 bits, it is checked whether or not bit 15 is changed after step (S205).

If the bit 15 changes from 0 to 1 or from 1 to 0, it is determined to be an overflow, and the process proceeds to step S207. If there is no change, the process proceeds to step S208, which will be described later.

(f) Step S207 performs a function of removing the overflow occurring in Step (d) and correcting the overflow occurring in Step S205. In this case, the correction method may be performed in various manners, such as a method of coding an instruction to add 1 bit to the 15th bit again, or to fix the binary code of the 15th bit.

(g) Step S208 performs the function of generating corrected vanadium detector data. In this embodiment, an error corrected vanadium detector data is generated by adding integer values and decimal values distributed and stored in the first register and the second register.

In this embodiment, the decimal value stored in the second register may be moved to the first register, summed with the integer value, and the second register may be deleted.

(h) Step S209 performs the function of converting the output scale of the heavy water reactor by multiplying the corrected vanadium detector data by the scale variable. In the present embodiment, since the vanadium detector data added through the matrix operation is a scale-converted value for convenience of operation, a matrix normalizing process is required.

For example, the matrix nomalizing factor may be a value of 0.1223066. By multiplying the scale variable, a value corresponding to the output scale for heavy water control can be generated.

The above-described steps can be algorithmized through an instruction (coding) for performing each step, and the program can be recorded and used on a recording medium.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. will be. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by all changes or modifications derived from the scope of the appended claims and equivalents of the following claims.

10: Vanadium detector
S201: (a) storing an integer value of vanadium detector data in a first register
S202: (b) storing the decimal value of the vanadium detector data in the second register
S203: (c) judging whether the prime number stored in the second register is rounded off
S205: (d) adding 1 bit to the binary code of the integer value stored in the first register
S206: (e) judging whether overflow occurs in the highest binary code of the integer value
S207: (f) Step of correcting by removing overflow
S208: (g) generating corrected vanadium detector data
S209: (h) Converting the output scale of the heavy water reactor nuclear power plant

Claims (3)

A computer program for calculating an output of a heavy water reactor using data of a vanadium detector,
(a) storing an integer value of the vanadium detector data in a first register;
(b) storing a decimal value of the vanadium detector data in a second register;
(c) determining whether the prime number stored in the second register is rounded off;
(d) adding 1 bit to the binary code of the integer value stored in the first register at the rounding of the decimal value as a result of the determining in the step (c);
(e) if the 1-bit is added, determining whether overflow occurs in the most significant binary code of the integer value; And
and (f) if the overflow occurs, removing the overflow and correcting the overflow. < Desc / Clms Page number 19 >
The method according to claim 1,
(g) generating corrected vanadium detector data by summing the corrected integer value and the decimal value. < RTI ID = 0.0 > 8. < / RTI >
3. The method of claim 2,
(h) converting the output scale of the heavy water reactor by multiplying the corrected vanadium detector data by a scale variable.

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