Environmental Engineering Reference
In-Depth Information
7
Materials management strategies for
pressurized water reactors (PWRs)*
Y. H. JEONG and S. S. HWANG , Korea Atomic
Energy Research Institute, Korea
DOI: 10.1533/9780857097453.3.315
Abstract : This chapter discusses management strategies in terms of
mitigation and repair techniques for degradation in pressurized water
reactors (PWRs). We begin by introducing PWR materials management
strategies followed by details of ageing and life management of the PWR
components. International cooperation activities for ageing management
are also included. Development and application of mitigation techniques
for reactor pressure vessels, reactor internals, steam generators,
pressurizer nozzles, control rod drive mechanisms, and secondary piping
are described next. Mitigation and repair methods for degradation of
PWR components include: material changes, isolation techniques, weld
material changes, design changes, weld overlays, stress improvements,
environment improvement, mechanical repair and component
replacement or removal. Finally, cracking history of components around
the world and countermeasures are introduced.
Key words : PWR, life management, reactor pressure vessel, reactor
internals, steam generators, pressurizer nozzles, control rod drive
mechanisms, primary and secondary pipings.
7. 1
Introduction
￿ ￿ ￿ ￿ ￿ ￿
In the case of PWR power plants, Korea, China and Europe continue to
build nuclear power plants which show advanced performance, whereas the
* Copyright information: Please note that some material in the following sections has been
published previously in the cited articles:
Section 7.2 (IAEA 2011. Chapter 3) Reprinted with permission from the International Atomic
Energy Agency.
Sections 7.2.1 and 7.3.3 (Shah and MacDonald 1993. Chapter 3.6 and 3.7) Reprinted with per-
mission from © Elsevier 1993.
Sections 7.2.1, 7.2.2 and 7.2.3 (Morgan and Livingston 1995. Chapter 2.1.2, 3.1, 4.2 and 4.5)
Courtesy Pacifi c Northwest National Laboratory, operated by Battelle Memorial Institute
for the U.S. Department of Energy.
 
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