10.14489/td.2015.06.pp.018-025

2015, 06 June

DOI: 10.14489/td.2015.06.pp.018-025

Sudakov A. V., Polupan A. V., Slovtsov S. V., Rybnikov A. I., Goriunov O. V., Ovchinnikova Yu. A.
NUMERICAL AND EXPERIMENTALR OF THE STRESS-STRAIN STATE AND FATIGUE DAMAGE ACCUMULATION IN THE WALLS OF STAINLESS STEEL PIPES FOR LOCAL TEMPERATURE INFLUENCES. PART 1
(pp. 18-25)

Abstract. Results of experimental research of the origin and development of thermal fatigue damage in pipes of Æ16x1, Æ16x1,5, Æ16x2 and Æ63x3 mm of steel 12X18H10T (12Cr18Ni10T) and 12X18H9T (12Cr18Ni9T) are presented. Investigation is carried out on the stand, in-vented by JSC “NPO CKTI ” for research cracking of nuclear power plant equipment. Pipes specimens are heated with superheated vapour of water. Places of development of thermal fatigue cracks are cooled with water of ambient temperature. Temperatures, tensions and pressure are measured with special equipment. Dynamics of development thermal fatigue cracks is researched by visual measurement, capillary, ultrasonic (with Rayleigh waves) and eddy current testing. Wide nondestructive testing is being held both during cracks appearance and during cracks growth. Also, calculations of thermal stresses arising in pulsation of temperature are performed. The experimental data of preliminary research are compared with the fatigue curves obtained by calculation on regulatory procedures. The chemical composition and mechanical properties of the metal test tubes are defined by experimental way. It is performed metallographic examination of pipes with thermal fatigue damage accumulation.

Keywords: thermal fatigue cracks, nuclear power plant, Rayleigh waves, nondestructive testing.

+ - About the Authors Click to collapse

A. V. Sudakov
JSC “NPO CKTI”, Saint Petersburg, Russia.

A. V. Polupan
“Lenstroyekspertiza” Ltd., Saint Petersburg, Russia. E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

S. V. Slovtsov, A. I. Rybnikov, O. V. Goriunov, Е. A. Ovchinnikova
JSC “NPO CKTI”, Saint Petersburg, Russia

+ - References Click to collapse

1. Slovtsov S. V., Sudakov A. V. (1980). The study of tem-perature field in the sample during testing on thermal fatigue and deformation in environments. Trudy TsKTI, 175, pp. 33-36.
2. Slovtsov S. V., Sudakov A. V. (1982). The reliability of power equipment elements under random stresses caused by tem-perature pulsation. Trudy TsKTI, 192, pp. 71-79.
3. Slovtsov S. V., Sudakov A. V. (1982). The reliability and durability of the elements of the generator in terms of temperature pulsation. Trudy TsKTI, 199, pp. 84-92.
4. Slovtsov S. V., Sudakov A. V. (1983). Evaluation of du-rability of steam generator pipes. Prikladnaia mekhanika, XIX(4), pp. 74-78.
5. Slovtsov S. V., Sudakov A. V. (1983). The durability of the equipment in condition of the temperature pulsation. Heat transfer and applied fluid dynamics. Kiev: Naukova dumka, pp. 178-182
6. Slovtsov S. V., Krasnoukhov Iu. V., Paskar' B. L., Sudakov A. V. (1983). The study of heat transfer and durability assessment of steam generators. Trudy TsKTI, 202, pp. 117-126.
7. Kudriavtsev I. S., Paskar' B. L., Sudakov A. V., Slovtsov S. V. (1985). Investigation of temperature and thermal-hydraulic characteristics during boiling of water in the annulus. Energomashinostroenie, (3), pp. 35-38.
8. Piven' L. V., Slovtsov S. V., Sudakov A. V. (1985). The influence of temperature pulsation on the resource direct-flow steam generator of NPP. Trudy TsKTI, 219, pp. 51-56.
9. Kozlov B. M., Sudakov A. V., Slovtsov S. V. (1985). Study of transient temperature fields direct-flow steam generator during the flow variation. Proceedings of the VII All-union confer-ence «Two-phase flow in energy machines and devices». Vol. 2, pp. 393–394.
10. Krasnoukhov Iu. V., Slovtsov S. V. (1986). Calculation of temperature fields of the tube plate of the steam generator BN-600 in terms of the cast of moisture. Trudy TsKTI, 232, pp. 79-83.
11. Sudakov A. V., Slovtsov S. V., Piven' L. V. (1989). Cal-culation of temperature fields and stresses in the elements of power equipment under arbitrary variation of ambient temperature. Trudy TsKTI,254, pp. 3-8.
12. Sudakov A. V., Trofimov A. S. (1989). Temperature pul-sation and durability of the elements of power equipment. Leningrad: Energoatomizdat.
13. Sudakov A. V., Slovtsov S. V. (1990). The resource of the elements of power equipment, working in conditions of pulsating temperatures. Tiazheloe mashinostroenie, (3), pp. 8-12.
14. Sudakov A. V., Slovtsov S. V. (1991). Engineering calcu-lations of transient temperatures and thermal stresses. Tiazheloe mashinostroenie, (8), pp. 9-11;38.
15. Sudakov A. V., Slovtsov S. V. (2004). Resource of the el-ements of power equipment at voltages caused by the temperature pulsations. Methods to improve the technical level and reliability of elements of the power equipment of thermal and nuclear power plants: collection of scientific papers. Vol. 293, pp. 8 – 12.
16. Sudakov A. V., Slovtsov S. V., Polupan A. V. (2008). The study of dynamics of development of thermal fatigue cracks. Kontrol'. Diagnostika, (6), pp. 6-8; 13-16.
17. Polupan A. V., Slovtsov S. V. (2009). Dependency «Ul-trasonic testing diagnostic parameters – metal characteristics» in ther-mal fatigue testing. Kontrol'. Diagnostika, (11), pp. 11-18.
18. Sudakov A. V., Slovtsov S. V., Polupan A. V. (2010). Thermal stress caused by temperature pulsation is practically always followed by heat exchange processes in high-efficiency power-generating equipment. The Journal of Russian Society for Non-Destructive Testing and Technical Diagnostics. Testing. Diagnostics, (1), pp. 14-18.
19. Sudakov A. V., Slovtsov S. V. (2013). Modern methods of evaluating the strength and resource of power in the conditions of thermal pulsations and vibrations. Teploenergetika, (1), pp. 1-8.

+ - 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 350 rubles. (including VAT 18%). 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 fill out the form below: