The micro structural study of 15Kh2MFA and 15Kh2NMFA reactor pressure vessel steels using positron-annihilation spectroscopy, mössbauer spectroscopy and transmission electron microscopy

Fe–Cr alloys behavior after helium implantation

“…by cascade collisions. To simulate high neutron fluences, helium implanted specimens have been studied by conventional positron annihilation lifetime spectroscopy (PALS) and positron annihilation lifetime spectroscopy with the slow pulsed positron beam Pulsed Low Energy Positron System (PLEPS) [2] at the high intensity positron source NEPOMUC [3]. Applications of the PLEPS techniques on reactor pressure vessel steels and advanced nuclear materials are described mostly in [4].…”

Phase Composition Study of Corrosion Products at NPP

“…Our experiences with such measurements applied on different VVER-440 construction materials were published in [15,[20][21]. From other works it is possible to mention [22].…”

“…Published online 21 This book covers various topics, from thermal-hydraulic analysis to the safety analysis of nuclear power plant. It does not focus only on current power plant issues.…”

Positron Lifetime Study of Reactor Pressure Vessel Steels

“…This is mainly due to the sensitivity of the PL spectroscopy to the open-volume defects of the size as small as a single vacancy [7]. Subsequent PL studies of the same steels revealed, however, a lower value of the mean positron lifetime of about 140 ps [9]. Subsequent PL studies of the same steels revealed, however, a lower value of the mean positron lifetime of about 140 ps [9].…”

“…The Cr±Mo±V RPV steels were studied by PL spectroscopy [3,8] and the mean positron lifetime around 155 ps was found. Decomposition of the PL spectra of the Cr±Mo±V RPV steels into two components resulted in the lifetime of trapped positrons of % 150 ps [9,10]. Despite of this discrepancy, both the values are significantly higher than the bulk positron lifetime in a-Fe (108 ps, see Section 3.1).…”