Lifetime Management of EDF PWR Pressure Vessels and Pipings

2004 ◽  
Author(s):  
F. Hedin ◽  
J. C. Legendre
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Pressure Vessels ◽  
Destructive Testing ◽  
Key Points ◽  
Cast Stainless Steel ◽  
Non Destructive

Lifetime management of EDF PWR vessels and pipings are one of the main technical key points of safety and competitivness. This paper describes the EDF global approach in this field, which is applied to the nuclear fleet i.e 58 nuclear power plants, and particularly to the first 34 three loops, as far as lifetime is concerned: • operating procedures and routine maintenance, special maintenance and ten years safety reassessment, • engineering analysis, based on feed back experience, scientific knowledge, degradations mechanisms, causes and consequences management, • operating loadings decrease, • complementary deterministic and cost-benefit analysis, • fit for service justifications, • anticipation strategy to prepare future, based on Non Destructive Testing investigations, ability to repair and/or to replace components, in situ expertises, ... Some examples are given: lifetime management of reactor vessels heads and bottom penetrations of pressure vessels, fit for service of cast stainless steel primary pipings, primary nozzles and auxiliary pipings special maintenance.

Codes Comparison and Analysis of Dissimilar Metal Welds: Ultrasonic Testing in Nuclear Power Plants

2010 ◽  
Author(s):  
Zhimin Zhong ◽  
Goufeng Zhang ◽  
Guanghua Yuan
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Pressure Vessels ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Dissimilar Metal ◽  
The Difference ◽  
Non Destructive ◽  
Performance Demonstration

Dissimilar Metal Welds have been widely used at safe-related pressure vessels and piping in Nuclear Power Plants. Some industry codes have been developed for nuclear power plants, such as ASME BPVC volume III & XI, Germany KTA 3201.3 and 3201.4 code and Russia code of light water nuclear power plants. The difference of those codes and some industry feed backs and some experiment results have been briefly introduced and discussed. Furthermore, the inspection qualification or performance demonstration, one of new requirements of some codes, especially for pre-service and inservice inspection of nuclear power plants, really promote continual improvements of DMWs UT both on detection rate and sizing accuracy. Additional, these works really benefit the revision of EJ/T 1039-1996, Non-destructive testing for mechanical components in nuclear island of nuclear power plants, as china building more and more nuclear power plants.

Non-destructive testing of equipment and pipelines in nuclear power plants with RBMK

Atomic Energy ◽  
2012 ◽  
Vol 113 (1) ◽  
pp. 57-63
Author(s):  
Yu. G. Dragunov ◽  
B. P. Strelkov ◽  
A. A. Arefyev ◽  
A. S. Mokrousov ◽  
N. G. Roshchin
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Equipment And Pipelines ◽  
Non Destructive

NOMAD: Non-Destructive Evaluation (NDE) System for the Inspection of Operation-Induced Material Degradation in Nuclear Power Plants — Overview of the Neutron Irradiation Campaigns

2020 ◽  
Author(s):  
Inge Uytdenhouwen ◽  
Rachid Chaouadi
Keyword(s):  
Neutron Irradiation ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Pressure Vessels ◽  
Material Heterogeneity ◽  
Non Destructive Evaluation ◽  
Surveillance Programs ◽  
Non Destructive

Abstract Worldwide there are more than 449 nuclear power plants (NPPs) in operation among which 329 reactors are older than 25 years and 94 will be operating for more than 40 years in 2020. Lifetime extensions are requested up to 50–60 years and sometimes even up to 80 years of operation for many existing NPPs. Long-term operation (LTO) of existing NPPs has therefore been accepted in many countries as a strategic objective to ensure supply of electricity for the coming decades. Within this strategy, the European Commission launched the NOMAD project, among others, through the Horizon-2020 programme. The reactor pressure vessels (RPVs) cannot be tested destructively in a direct way, neither can it be replaced. An indirect way is the use of Charpy samples from the so-called surveillance programs. The general strategy on the long term should focus on the ability to perform direct non-destructive evaluation (NDE) of the embrittlement of the vessel. NDE can be used to confirm that the data obtained by surveillance programs are being representative of the real state of the vessel for LTO. Moreover, a generic concern of large nuclear components such as the reactor vessel is the possible material heterogeneity such as macro-segregated regions which could eventually be located in the component but not in the baseline material used as surveillance material. Local non-destructive material inspection and comparison to reference materials in similar irradiation conditions would lead to a better assessment of the properties of the materials at any location of the vessel. The objective of NOMAD is to develop a tool that is capable of non-destructively evaluate the embrittlement of the vessel wall. The final system should be capable of inspecting the microstructure of the materials through the cladding. The tool that will be developed, will use existing and proven nondestructive testing techniques (NDT) with optimized and adjusted sensors. A combination of several techniques based on micro-magnetic, electrical and ultrasonic methods are investigated. Within NOMAD, they are calibrated and validated on a set of existing and newly irradiated samples consisting out of the most common RPV steels from Eastern and Western design, such as 22NiMoCr37, 18MND5, A533-B, A508 Cl.2, A508 Cl.3 and 15kH2NMFA. For the first time, a systematic study on a well-characterized set of samples that correlates the microstructure, mechanical properties, neutron irradiation conditions and non-destructive properties will be carried out. It will not only extend the existing database, but will include issues such as reliability, and uncertainty of the techniques as well as on material heterogeneity. The focus is laid on unbroken Charpy samples and large blocks with and without cladding to “simulate” the actual RPV inspection scenario. This paper gives an overview of the present status of the NOMAD project with focus on the outcome in WP1. The first preliminary NDE results from 6 set-ups and 28 parameters were compared with DBTT results from Charpy impact tests. They are very promising. Final results and detailed analysis will however only be available at the end of the project.

SOME ASPECTS OF NON-DESTRUCTIVE TESTING OF EQUIPMENT AND PIPELINES OF NUCLEAR POWER PLANTS

2021 ◽  
pp. 20-26
Author(s):  
V. M. Ushakov
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Energy Agency ◽  
Safety Standards ◽  
Equipment And Pipelines ◽  
Non Destructive

Topical aspects of non-destructive testing (NDT) of equipment and pipelines of power units of nuclear power plants (NPP) are considered. Non-destructive testing is an integral part of the entire life cycle of a nuclear power plant. Briefly analyzed documentation and types of non-destructive testing at the stage of manufacturing equipment and pipelines. Power of ultrasonic testing of welded joints of pipelines with a thickness of 2 to 6 mm. The main points of drawing up technological maps of non-destructive testing are noted. A brief analysis of the application of non-destructive testing in accordance with the requirements of the regulatory documents of the Russian Federation and the safety standards of the International Atomic Energy Agency is provided. It is shown that in recent years there has been a tendency to expand the role of NDTs from the classical approach of detecting and assessing defects to the use of NDTs in the study of metal degradation and ageing processes during the operation of NPP equipment and pipelines.

THE NON-DESTRUCTIVE TESTING FOR AGING MANAGEMENT OF EQUIPMENT AND PIPELINES AT NUCLEAR POWER PLANTS. REVIEW

2020 ◽  
pp. 6-18
Author(s):  
V. M. Ushakov ◽  
S. G. Evtushenko ◽  
A. D. Zhukov ◽  
A. S. Yurechko
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Noise Analysis ◽  
Efficient Solutions ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Degradation Factor ◽  
Equipment And Pipelines ◽  
Non Destructive

The paper presents some approaches and methods for assessing and evaluation of different properties of equipment and pipelines metal of nuclear power plants during an operation such as a stress-strain state, a temperature and electrochemical effects. A problem statement for ageing management is considered for such metal properties of the heat – bearing agents. For this purpose, an observation of literature is provided for non – destructive testing (NDT) methods that have a correlation to a degradation factor defined by certain properties. There is has been made a case to apply NDT methods as a promising tool for an estimation and evaluation of degradation factor for a metal of potentially hazardous equipment. For this purpose there are proposed some rational and efficient solutions likes of acoustic methods based on structural – reverberation noise analysis, electromagnetic methods based on a coercive field strength deviation and electrical methods based on principles of potentiometry.

scholarly journals The Challenges of Implementing the Indonesian Experimental Power Reactor (RDE) Program

2021 ◽  
Vol 2048 (1) ◽  
pp. 012001
Author(s):  
D S Wisnubroto ◽  
G R Sunaryo ◽  
Y S B Susilo ◽  
S Bahri ◽  
T Setiadipura
Keyword(s):  
Cost Estimation ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Fossil Fuels ◽  
Cost Benefit Analysis ◽  
Small And Medium Enterprises ◽  
Cost Benefit ◽  
Long Run ◽  
Medium Enterprises

Abstract This paper shows the effort to implement the RDE and its challenges from 2013 to 2018. RDE was a program to introduce nuclear power plants by building non-commercial power reactors. The RDE program was also used to prove that Indonesian engineers can design a reactor that will later supply electricity and steam for industry. The technology used is a high-temperature gas-cooled reactor. This RDE program is a very strategic intermediate target for energy security and national sovereignty. The development of RDE-based nuclear power plants, in the long run, is expected to have implications for reducing reliance on fossil fuels, more self-sufficiency in energy supply increases national industrial capacity and competitiveness in the global economic order, as well as enhance energy and political diplomacy. Also, RDE can be a reference installation for PeLUIt (Power and Steam Generators for Industry) power plants for small and medium enterprises to meet the demand for electricity and industrial heat in an area’s needs. However, many challenges occurred to implement this program; among them were cost estimation and cost-benefit analysis. Although the program has not been realized, mainly for financial reasons, many positive things have been obtained from these activities.

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