Published April 2018 | Version v1
Journal article Metadata-only

Micro-structure and properties analysis of nuclear power stem material 17-4PH stainless steel at different service time

Creators

  • 1. China Institute of Atomic Energy, Beijing (China)

Description

In this paper, the micro-structure and properties of the stem material 17-4PH stainless steel operating at 300℃ for a long time in nuclear power plant were studied. The materials were taken from the vital vapor plant of a nuclear power plant in China, VVP-1 to VVP-3 are main steam isolation valves of 11, 14 and 19 years, respectively. The micro-structure and properties of 17 materials were studied by impact performance test, metallographic and fracture morphology analysis. The results showed that the VVP stem materials of different service time appeared different degrees of embrittlement. The impact absorption at 0℃decreases by 118J, 132J and 156J, respectively. The growth of martensite and large size ferrite were observed. By fitting the data in the experiment and literature, the thermal aging life curve was obtained. (authors)

Additional details

Publishing Information

Journal Title
Chinese Journal of Nuclear Science and Engineering
Journal Volume
38
Journal Issue
2
Journal Page Range
p. 318-325
ISSN
0258-0918

INIS

Country of Publication
China
Country of Input or Organization
China
INIS RN
55007004
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
ABSORPTION; AGING; CHINA; DIAGRAMS; EMBRITTLEMENT; FERRITE; FERRITES; FRACTURES; MARTENSITE; METALLOGRAPHY; MICROSTRUCTURE; MORPHOLOGY; NUCLEAR POWER; NUCLEAR POWER PLANTS; PWR TYPE REACTORS; STAINLESS STEELS; STEAM; VALVES; VAPORS
Descriptors DEC
ALLOYS; ASIA; CARBON ADDITIONS; CONTROL EQUIPMENT; ENRICHED URANIUM REACTORS; EQUIPMENT; FAILURES; FERRIMAGNETIC MATERIALS; FLOW REGULATORS; FLUIDS; GASES; HIGH ALLOY STEELS; INFORMATION; IRON ALLOYS; IRON BASE ALLOYS; IRON COMPOUNDS; MAGNETIC MATERIALS; MATERIALS; NUCLEAR FACILITIES; OXYGEN COMPOUNDS; POWER; POWER PLANTS; POWER REACTORS; REACTORS; SORPTION; STEELS; THERMAL POWER PLANTS; THERMAL REACTORS; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENT COMPOUNDS; WATER COOLED REACTORS; WATER MODERATED REACTORS

Optional Information

Notes
8 figs., 3 tabs., 15 refs.