10.14489/td.2023.04.pp.004-013

2023, 04 April

DOI: 10.14489/td.2023.04.pp.004-013

Danilov V. N.
TO ASSESS THE RATIO OF ECHO SIGNAL LEVELS AND STRUCTURAL NOISE DURING ULTRASONIC TESTING OF CERTAIN TYPES OF STEEL USED IN THE MANUFACTURE OF NUCLEAR POWER PLANT EQUIPMENT
(pp. 4-13)

Abstract. Based on computer modeling, the signal-to-noise ratio estimates are made for models of reflectors in the form of a side drilled hole and a round flat bottom hole small size during ultrasonic method by an angle probe of products made of a number of types of steel used in the manufacture of equipment for nuclear power plants. It is shown that for steels of types 20, 12X1MF and 10GN2MFA, the ratio of the levels of the echo signal and structural noise (signal/noise) for both models with a large margin satisfy the criterion of Prof. I. N. Ermolov reliable detection of a useful echo signal. For steel of type 15X2MFA-A, due to a sufficiently large value of the average grain size and, accordingly, an increased level of structural noise, the signal-to-noise ratio may not meet the criterion of Prof. I. N. Ermolov, which necessitates an increase in this ratio, for example, by increasing the damping of the piezoelectric plate of the angle probe. To increase the signal-to-noise ratio and increase the amplitude of the echo signal, it may be advisable to use a angle probe with a composite piezoelectric plate.

Keywords:

+ - About the Authors Click to collapse

V. N. Danilov (JSC “RPA “CNIITMASH”, Moscow, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. Ermolov I. N., Lange Yu. V. (2006). Nondestructive Testing: Handbook: in 8 volumes. Vol. 3. Ultrasonic Testing. 2nd ed. Moscow: Mashinostroenie. [in Russian language]
2. Ermolov I. N. (1981). Theory and practice of ultrasonic testing. Moscow: Mashinostroenie. [in Russian language]
3. Danilov V. N., Ushakov V. M. (2021). Research of structure of samples of metal of power pipelines by ultrasonic method. Kontrol'. Diagnostika, (6), pp. 4 – 14. [in Russian language] DOI: 10.14489/td.2021.06.pp.004-014
4. Kuleshova E. A., Mal'tsev D. A., Fedotova S. V., Frolov A. S. (2011). Structural Investigations of 15Kh2MFA-A Steel of Modification A of Strength Category KP-45 for Prospective Nuclear Reactors. Proceedings of the 13th Scientific-Technical Conference of Young Specialists. Podol'sk: OKB «Gidropress». [in Russian language]
5. Danilov V. N., Kretov E. F., Razygraev N. P. et al. (2018). Research of the ultrasonic control of metal by the angle beam probe through the cladding fused layer. Kontrol'. Diagnostika, (7), pp. 4 – 18. [in Russian language]. DOI: 10.14489/td.2018.07.pp.004-019
6. Dragunov Yu. G., Zubchenko A. S. (Eds.) (2014). Handbook of steels and alloys. 4th ed. Moscow: Mashinostroenie. [in Russian language]
7. Danilov V. N. (2021). Calculations of acoustic paths of inclined transducers in ultrasonic flaw detection. Moscow: Izdatel'skiy dom «Spektr». [in Russian language]
8. Unified methods of control of basic materials (semifinished products), welded joints and cladding of equipment and pipelines of nuclear power plants. Ultrasonic checking. Part 2. Inspection of welded joints and surfacing. (1992). Rules and regulations in the nuclear power industry No. PNAEG-7-030-91. Moscow: TsNIIatominform. [in Russian language]
9. Danilov V. N. (2006). Computer simulation program for the operation of electroacoustic paths of flaw detectors "Impulse +". Defektoskopiya, (3), pp. 37 – 43. [in Russian language]
10. Ermolov I. N. (2004). Advances in theoretical issues of ultrasonic flaw detection, tasks and prospects. Defektoskopiya, (10), pp. 13 – 48. [in Russian language]
11. Yamshchikov V. S., Danilov V. N. (1984). About reflection of longitudinal and transverse elastic waves from a cylindrical cavity in a half-space. Defektoskopiya, (4), pp. 3 – 11. [in Russian language]
12. Danilov V. N., Ermolov I. N. (2001). Toward computer modeling of the echo signal from a lateral cylindrical hole. Defektoskopiya, (8), pp. 3 – 10. [in Russian language]
13. Danilov V. N., Ermolov I. N. (1999). Calculation of composite piezoelectric transducers on a computer model. Defektoskopiya, (3), pp. 3 – 7. [in Russian language]
14. Danilov V. N., Ermolov I. N., Ushakov V. M. (1999). Transducer with composite piezo plate. Kontrol'. Diagnostika, (10), pp. 32 – 34. [in Russian language]
15. Danilov V. N. (2021). About features of characteristics of a signal of the angle beam probe with composite piezoplate and various types piezoelectric ceramics. Kontrol'. Diagnostika, (2), pp. 6 – 16. [in Russian language]. DOI: 10.14489/td.2021.02.pp.006-016

+ - Purchase digital version of a single article Click to collapse

This article is available in electronic format (PDF).

The cost of a single article is 500 rubles. (including VAT 20%). After you place an order within a few days, you will receive following documents to your specified e-mail: account on payment and receipt to pay in the bank.

After depositing your payment on our bank account we send you file of the article by e-mail.

To order articles please copy the article doi:

10.14489/td.2023.04.pp.004-013

and fill out the form