Characteristics of radiation porosity formed upon irradiation in a BN-600 reactor in the fuel-element cans of cold-deformed steel EK-164 (06Kh16N20M2G2BTFR)-ID c.d.

Abstract

At present, it is the austenitic cold deformed steel EK164 (06Kh16N20M2G2BTFR) ID that is considered as a promising material for the achievement of a maximum damage (no less than 110 dpa) and max imum burnup (≥15%). In this work, we have determined the characteristics of porosity formed upon irradiation in a BN 600 reactor to the maximum damaging dose of 77 dpa in the materials of fuel element cans made of cold deformed steel EK164 ID c.d. A comparison has been made with analogous characteristics obtained ear lier using the standard material, i.e., the cold deformed steel ChS68 (06Kh16N 15M2G2TFR) ID c.d.

Effect of Multistage High Temperature Thermomechanical Treatment on the Microstructure and Mechanical Properties of Austenitic Reactor Steel

“…Austenitic stainless steels are used as structural materials in various industries, including the nuclear power engineering [1][2][3]. In Russia, austenitic stainless steels ChS-68 (Fe-16Cr-15Ni-2Mo-Mn-Ti-V-B) and EK-164 (Fe-16Cr-19Ni-2Mo-2Mn-Nb-Ti-B) are used for the manufacture of fuel cladding shells of fast-neutron (Generation III) nuclear reactors BN-600 and BN-800 [4][5][6]. These steels have a number of attractive qualities, such as high ductility, increased heat resistance, lack of tendency to low-temperature embrittlement compared to other structural materials.…”

“…A common problem limiting the use of austenitic steels in the nuclear power industry is their radiation-stimulated swelling at high irradiation doses. The studies of radiation porosity under irradiation in the BN-600 reactor (maximum damaging dose 77 dpa) [5,6] showed that under identical irradiation conditions, steel EK-164 swells 1.5-2 times less than steel ChS-68. Some authors [5] attribute this to the increased content of Ni (19% wt.)…”

“…The studies of radiation porosity under irradiation in the BN-600 reactor (maximum damaging dose 77 dpa) [5,6] showed that under identical irradiation conditions, steel EK-164 swells 1.5-2 times less than steel ChS-68. Some authors [5] attribute this to the increased content of Ni (19% wt.) and the complex system of alloying-the presence of Ti, Nb, V, B, Si, etc.…”

Neural Network Model of Iron Diffusion in Austenitic Steels

“…В работах [19,20] Из табл. 2 видно, что материал оболочки ТВЭЛа № 9 имеет более высокое распухание по сравнению с ТВЭЛом № 50 при одинаковых эксплуатационных режимах.…”

“…Заметим, что в состав стали ЭК164 включены бор и церий, не участвовавшие в процессе облучения искусственной нейронной сети. Подставляя параметры всех элементов во входной набор данных, проведем расчет при минимальном (min) и максимальном (max) содержании легирующих элементов стали ЭК164 [19]…”