1、 STP-NU-057 ASME CODE DEVELOPMENT ROADMAPFOR HOPE PIPE IN NUCLEAR SERVICE Prepared by: Adel N. Haddad A. N. Haddad Plastic Consulting, LLC Ml: STANDARDS TECl-INOLOGY, LLC Date oflssuance: January 31 , 2013 This report was prepared as an accomlt of work sponsored by ASME Nuclear Codes and Standards a
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9、E Standards Technology, LLC All Rights Reserved ASME JIDPE Roadmap STP-NU-057 TABLE OF CONTENTS Fo:reword . iv Ex.ecutive Summary . v Stakeholders . . vi INTRODUCTION AND ORGANIZATION 1 2 THE HDPE PIPE TECHNOLOGY ROADMAP 2 3 IDENTIFIED R only 13 years after commercial operation. To date, the HDPE pi
10、ping at Catawba Nuclear Station has performed well and has proven to be a cost effective way to address the corrosion issues in the stations service water piping. HOPE piping is durable, requires very low maintenance and has lower overall cost than metallic piping. As a result of the success at Cata
11、wba Nuclear Station, Duke Energy and other utilities have sought to use HDPE piping in buried ASME Section III, Class 3 service water system applications. In 2008, the Nuclear Regulatory Commission (NRC) approved a Relief Request for the AmerenUE Callaway Nuclear Plant for the use of HDPE in buried
12、sections of its essential service water system. The HDPE piping in the Callaway essential service water system has been in operation since late 2008. In 2009, the NRC approved a Relief Request for Catawba Nuclear Station for use of HDPE in buried sections of its nuclear service water system. Section
13、s of the HDPE piping in the Catawba nuclear service water system have been in operation since late 2010. It is the desire of ASME, Utilities, Regulators, the HDPE industry, Architect-Engineer (AE) firms and Constructors to develop a technology roadmap, which will support technology strategy and plan
14、ning goals to achieve safety, reliability, economic and research and development. Achieving a broad acceptance of HOPE pipe for use in water systems at nuclear plants will require collaboration and sponsorship from industry, regulators, government entities, research organizations, domestic and inter
15、national associations and individuals. Established in 1880, the American Society of Mechanical Engineers (ASME) is a professional not for-profit organization with more than 127,000 members promoting the art, science and practice of mechanical and multidisciplinary engineering and allied sciences. AS
16、ME develops codes and standards that enhance public safety, and provides lifelong learning and technical exchange opportunities benefiting the engineering and technology community. Visit www.asme.org for more information. The ASME Standardls Technology, LLC (ASME ST-LLC) is a not-for-profit Limited
17、Liability Company, with ASME as the sole member, formed in 2004 to carry out work related! to newly commercialized technology. The ASME ST-LLC mission includes meeting the needs of industry and government by providing new standards-related products and services, which advance the application of emer
18、ging and newly commercialized science and technology and providing the research and technology development needed to establish and maintain the technical relevance of codes and standards. Visit www.stllc.asme.org for more information. iv ASME JIDPE Roadmap STP-NU-057 EXECUTIVE SUMMARY Existing metal
19、lic piping systems in safety related and non-safety related service water in nuclear power plants are prone to tuberculation, corrosion and leaks, and require replacement, in some instances in less than ten years of service. Non-safety related HDPE piping systems currently installed in nuclear power
20、 plants have proved to be reliable since 1996. Several utility owners have successfully installed HDPE piping. The owners would then seek approval by the Nuclear Regulatory Commission (NRC) through a Relief Request process. The NRC Relief Request process normally requires one year to complete. Devel
21、opment of and NRC approval of ASME Boiler and Pressure Vessel Code rules for use ofHDPE would be very beneficial to all parties in the nuclear power industry. Much research and testing has been undertaken and is continuing in support ofHDPE use for nuclear power piping. The ASME HDPE Roadrnap propos
22、es strategies which will be used to develop appropriate rules to impart science and structure to the HDPE piping application in nuclear service. The Roadmap identifies critical technologies and infrastructure gaps, barriers and opportunities, and recognizes and prioritizes research and development p
23、rograms and new technology needs 1. Among the issues identified for resolution are: piping system design requirements and engineering properties; pipe fusion procedures; fusion integrity analyses and testing procedures development; pipe performance requirements; volumetric examination methods and de
24、termination of acceptable material flaws applicable to U.S. and international standards and procedures. The execution of these strategies requires technical and financial commitment by the nuclear industry operators and suppliers as well as academia and regulators. Immediate financial and technical
25、commitments are needed to execute several of these strategies. HDPE pipe replacement saves money and enhances safety. It is easy to install, it is corrosion free, durable and not subject to fouling. The ASME HDPE Roadmap is the first step toward establishing a disciplined structure toward creating C
26、ode rules to address pressing industrys needs. The next step will focus on follow-up activities dealing with executing current needs, and simultaneously developing future endeavors. v STP-NU-057 ASME HDPE Roadmap STAKEHOLDERS The ASME HDPE Roadmap stakeholders are members of Section Ill Stakeholders
27、 Group. The members are: Richard Barnes-BVP Standards Committee ITI Chairman Gary Park- BPV Standards Committee XI Chairman Steve Lefler* - Duke Energy Stephen Boros - Plastic Pipe Institute Craig Scott* - AREV A Bo Clark - EPRI Tim Lupoid - NRC Frank Schaaf- BPV Standards Committee XI Members with
28、an asterisk (*) next to their name were called on to become members of the Reviewers Team, whose mission was to advise the Roadmap Author and review and edit the Roadmap content. vi ASME JIDPE Roadmap STP-NU-057 1 INTRODUCTION AND ORGANIZATION The objective of the ASME HDPE Roadmap is to develop a s
29、trategy for advancing the rules that will govern the technical aspects of the design, installation, operation and inspection of HDPE piping systems in nuclear power plants. Scientifically and statistically based rules will instill safety and confidence, and these rules are in the best interest of th
30、e nuclear industry, re!:,rulators, the HOPE industry and the general public. The ASME HDPE Roadrnap strategy aims to identify gaps, remove roadblocks, facilitate necessary research and resolve concerns. The Roadmap is intended to lead to the development of Code rules, which can subsequently be endor
31、sed by the regulator (NRC) for generic use and application to facilitate licensing without the need for an application specific Relief Request. The strategies and plans of the ASME HOPE Roadrnap (this document) attempt to identify and characterize the industry and regulators concerns, establish rele
32、vant justifications for desired research, and challenge researchers and providers to deliver solutions 2. The Roadrnap identifies codes and standards related to HDPE piping and may require modification to address HDPE piping applications in nuclear service. This document does not address the process
33、, or Roadmapping. The technology Roadmapping represents a powerful technique to support technological management and planning, especially to explore and communicate dynamic interactions between resources, organizational goals and environment changes 3. The Technology Roadrnapping process provides a
34、way to develop, organize and present information about critical requirements and desirable performance of objectives that must be achieved at the planned time 2. This report is structured as follows: It describes the research and networking leading to the development of the road!map strategies and p
35、lans It identifies major issues of concerns, gaps and roadblocks. It clarifies issues by describing their background and lays out options for technical solutions. The roadmap summarizes and prioritizes research projects deemed important to receive technical solutions. lt displays projects schedule a
36、nd mjlestones in a Gantt style chart and tabulated form. STP-NU-057 ASME HDPE Roadmap 2 THE HOPE PIPE TECHNOLOGY ROADMAP The objective of the ASME HDPE Roadmap is to lead the industry toward achieving its principal goal, which is to advance and increase the use of HDPE piping in nuclear power plants
37、. This can be achieved through the development of Code rules following proposed plans and strategies which will result in a structured and safe application. Proposed plans and strategies will serve as instruments to identify gaps and obstacles, resolve technical issues and forecast and identify rese
38、arch needed to establish an acceptable basis to support the use ofHDPE piping in nuclear plant applications. Several projects to replace worn-out metal pipes and or install new piping systems are underway. The use of HDPE piping in nuclear power plants will promote safety, durab ility and cost savin
39、g in construction and operation. The current practice to license an HDPE piping system in nudear power plants is through an application to the Nuclear Regulatory Commission (NRC) for a Relief Request. This process is complex and time consuming. Instead, ASME has developed this Roadmap which eventual
40、ly will lead to: Researching and fmding solutions to current technical issues. Developing a comprehensive Code that is specific and succinct, and which precludes the need for extensive licensing activities required for NRC acceptance. A questionnaire was developed and e-mailed to survey participants
41、 to collect information about real and perceived gaps and obstacles associated with current and future use of HDPE piping in nuclear water service applications. The composition of the survey participants were mainly members of ASME Section III Working Group on HDPE Research and Development and other
42、 contributors to ASME Sections II, 1X and XI. Additionally, input was requested from several members of the international conununity. Ensuing participant response, the questionnaire was followed by a telephone interview to discuss responders input. The total number of responders was 21 , or 70%, of
43、those invited to participate. The questionnaire or survey identified gaps, roadblocks, technical issues and proposed solutions. The responders provided a wealth of information relating to actual and perceived issues facing the continued success of HDPE piping in nuclear service. Participant input co
44、vered a wide range of subjects concerning applied engineering, product performance, regulatory, financing, etc. The table below summarizes the participant input. 2 ASME JIDPE Roadmap STP-NU-057 Table 1 - Summary of Survey Responses General Category Issues and/or Needs Category 1- Develop a clear pat
45、h to gain acceptance (EPRI TR or Topical Report) NRC 2- Acceptance criteria (Tell us what is acceptable and what is not) 3- Remove real or perceived difficulties and/or risks obtaining NRC approval 4- Clear timetable to develop and resolve NRCs concerns 5- Obtain NRCs concurrence with code requireme
46、nts for use of HDPE piping material so as to avoid the need for a Relief Request 6- Absence of overriding strategy , especially with NRC Regulatory, 1- An approved Code Case that precludes the need for extensive licensing activities Standardization Code Case 2- Place fusing requirements specific to
47、Section Ill or Section II 3- Place general fusing requirements in Section IX 1- Develop standards for tees, reducers. etc 2- Identify existing ASTM and ISO standards which need to consider nuclear applications Standards 3- Develop a standard for carbon black pigment or concentrate 4- Standardization
48、 of JIS, Code of practice and specification 1- Appropriate test method and service life models based o n fundamental knowledge of failure mechanics of PE 4710 resin (piping integrity) 2- Models to evaluate the effect of fusion variables o n thermo-rheological characteristics of PE 4710 during the fu
49、sion process 3- Reliable, repeatable and capable volumetric inspection technology including identified inspection limits and uncertainties (AIIowables) 4- Evaluate joints of pipes, valves, fittings under adverse conditions and transient behavior such as stress, chemicals/chlorine, cold fusion, vibration/earthquake, oxidation, fire/heat excursions 5- Assurance that brittle failure will not occur before piping system life-performance design 6- Develop and establish reliab
