ultrasonic testing of replacement pipe for nuclear reactor

(PDF) Analysis of Ultrasound Propagation in High

The flow rate of nuclear reactor feedwater is an important factor in the operation of a nuclear power reactor. Venturi nozzles are widely used to measure the flow rate.

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Mar 22, 2021 · Their replacement is time consuming, expensive and results in an interruption of the nuclear reactors productivity. Some uses of ultrasonic sensors include non-destructive testing (NDT), where components or systems are tested without causing damage, or condition monitoring of materials, components or systems, such as a nuclear reactor. Federal Register ::Approval of American Society of

  • Executive SummaryTable of ContentsI. BackgroundII. DiscussionIII. Opportunities For Public ParticipationIV. Public Comment AnalysisA. Need for the Regulatory Action
    The purpose of this regulatory action is to incorporate by reference into the NRC's regulations the latest revisions of three regulatory guides (RGs). The three RGs identify new, revised, and reaffirmed Code Cases published by the American Society of Mechanical Engineers (ASME), which the NRC has deterB. Major Provisions
    The three RGs that the NRC is incorporating by reference are RG 1.84, Design, Fabrication, and Materials Code Case Acceptability, ASME Section III, Revision 38; RG 1.147, Inservice Inspection Code Case Acceptability, ASME Section XI, Division 1, Revision 19; and RG 1.192, Operation and MaintenUS3664922A - In-service inspection of reactor vessel welds Method and apparatus for in-service inspection of nuclear reactor vessel welds. A support mechanism housing an inspection device is positioned within the reactor vessel after the internals thereof are removed. The hoist mechanism for the refueling device is then used to manipulate the inspection device from its support mechanism to the weld areas to be inspected.

    Flow Meters:To Clamp Or Not To Clamp? IMPO

    Dec 01, 2016 · Clamp-on fixtures with ultrasonic transducers strap or clamp onto the outside of either a new or existing pipe without the need to cut into the pipe or to shut down the process, saving time and money. Clamp-ons can be installed at any time, in difficult locations and without process contamination. Flow accelerated corrosion of carbon steel feeder pipes Oct 01, 2012 · Wall thinning of carbon steel feeder pipes due to FAC led to severe thinning in an Indian PHWR (Rajasthan Atomic Power Station unit #2). Based on an exhaustive wall thickness management program, an en-mass feeder pipe replacement was carried out in this reactor after 15.67 EFPY of reactor operation.

    Major overhaul of Russias Balakovo 4 completed - Nuclear

    Replacement of drainage concrete and floor cladding increased the reliability of structural elements of the compartments and the safety of nuclear power plant equipment. During the latest outage of Balakovo 4, the main and auxiliary equipment of the reactor and turbine sections, electrical equipment and instrumentation were repaired. Non Destructive Testing - Ultrasonic Testing

    • What Is Ultrasonic Testing?What Sort of Materials Can Be Tested?How Does It Work?What Are The Advantages of Ultrasonic Testing?What Are The Potential Limitations of Ultrasonic Testing?Ultrasonic Testing of WeldsStandardsUltrasonic Testing FAQUltrasonic nondestructive testing, also known as ultrasonic NDT or simply UT, is a method of characterizing the thickness or internal structure of a test piece through the use of high frequency sound waves. The frequencies, or pitch, used for ultrasonic testing are many times higher than the limit of human hearing, most commonly in the range from 500 KHz to 20 MHz.NDE and inspection, diagnostics News, Page 1 - Nuclear Sep 01, 2020 · Russia tests new nuclear reactor quality assurance method Thursday, January 04, 2018 by A new electroanalytical non-destructive testing technique has shown promise for diagnosing potential problems in nuclear reactors in a simulated environment.

      Nuclear Pipe Nightmares - Union of Concerned Scientists

      Oct 27, 2015 · Surry Nuclear Plant. On December 9, 1986, the 18-inch diameter pipe supplying water to main feedwater pump A for the Unit 2 reactor at the Surry nuclear plant in Virginia ruptured. This feedwater pipe provided water to the steam generators where it absorbed the heat produced by the reactor Overview of Nondestructive Testing (NDT) InspectioneeringNondestructive Testing (NDT) consists of a variety of non-invasive inspection techniques used to evaluate material properties, components, or entire process units. The techniques can also be utilized to detect, characterize, or measure the presence of damage mechanisms (e.g. corrosion or cracks).NDT is also commonly referred to as nondestructive examination (NDE), nondestructive evaluation

      Repair of Pressure Equipment and Piping in Nuclear Power

      Feb 15, 2017 · Finally, PCC-2 Part 5 addresses the general question of pressure or leak testing a repair. Note that, technically, PCC-2 has benefited from the work done in the nuclear industry, within Section XI. Some of the PCC-2 repairs were first drafted by nuclear power plant engineers. ASME XI Repairs with PCC-2 as a Roadmap Replacement Of Radiography Testing Of Nozzle To Shell 2.2 Ultrasonic Testing (Pulse-Echo, Contact Manual Technique) It is the most widely used ultrasonic method and involves the detection of echoes produced when an ultrasonic pulse is reflected from a discontinuity or an interface of a test piece. Short bursts of ultrasonic energy are introduced into a test piece at regular intervals of time.

      Replacement of split-pin assemblies in guide tubes

      Ultrasonic testing on the reactor at Point Beech, Wis. has revealed indications of cracks in about 90% of the split pins. Based on this relevation, it appears that discovery of a crack in a split pin would demand that corrective action be taken not only with respect to the guide tube involved but with respect to all guide tubes, typically about Sensor Technology Assessment for Advanced Reactors" Gen IV reactors whose coolant exit temperatures exceed ~650 °C and are moderated (as opposed to fast reactors). " Gas-cooled reactors that have been built and operated throughout the world to date, such as Dragon (UK), AVR (Germany), High Temperature Test Reactor or HTTR (Japan), etc. " Molten salt reactors

      U.S. NUCLEAR REGULATORY COMMISSION June

      vessel welds in light-water-cooled nuclear power plants by ultrasonic testing (UT). The scope of this guide is limited to reactor vessel welds and does not apply to other structures and components such as piping. B. DISCUSSION Reactor vessels must periodically be volumetrically examined according to Section XI of the ASME Code. ULTRASONIC INSPECTION OF NOZZLE WELDS (Journal The objective of this investigation was to evaluate the efficacy of ultrasonic testing (UT) for primary water leak path assessments of reactor pressure vessel (RPV) upper head penetrations. Operating reactors have experienced leakage when stress corrosion cracking of nickel-based alloy penetrations allowed primary water into the annulus of the interference fit between the penetration and the low-alloy steel

      Ultrasonic Pipe / Tank Testing - eci-ndt

      Ultrasonic Pipe / Tank Testing. ULTRASONIC PIPE TESTING. Due to the combination of a wide variety of physical factors, building operations and management personnel are finding themselves faced with new and more complex corrosion related piping problems. Many are clearly related to the quality of the water treatment program or a past lack of corrosion protection, some are due to past problems which Ultrasonic imaging techniques for non-destructive ultrasonic under-sodium viewing system in Fast Breeder Test Reactor. The system was used as a sweep-arm to scan the space below the core cover plate mechanism (CCPM) of the reactor to find any obstacle and also to image CCPM. The viewer is 6 m long and 90 mm in the diameter. It uses the ultrasonic transducer mounted horizontally at its

      Ultrasonic non-destructive testing solutions - Ultrasound

      Researchers of KTU Ultrasound Research Institute have extensive experience and know-how on development of new advanced ultrasonic measurement, imaging and non-destructive testing techniques for extreme conditions (high temperatures, strong radioactive radiation, high pressure and chemical activity), non-conventional applications of NDT, development of ultrasonic transducers, Weld Residual Stress Analysis and the Effects of The incidences of defects had been located by ultrasonic testing in various pressurizer nozzle dissimilar metal welds (DMW) at nuclear power plants. In order to evaluate the crack propagation, it is required to calculate the stress distribution including weld residual stress and operational stress through the wall thickness in the weld region.

      PNNL-19086:Replacement of Radiography with

      Ultrasonic testing (UT) has been proposed as a potential replacement method. While RT and UT are both volumetric nondestructive evaluation (NDE) methods, the physics of these processes are substantially different. Radiography relies on transmission and absorption/attenuation of small wavelength electromagnetic energy (x-rays and gamma rays).