13. Nuclear Pumps
Mr. Gregg graduated from Pennsylvania State University with a BSME in 1993. He is a graduate of the United States Naval Nuclear Power School and is a Registered Professional Engineer in the Commonwealth of Pennsylvania. He is a member of Subgroup on Design Methods (SC-D)(BPV III) and is Secretary of Working Group on Pumps (SG-CD)(BPV III). Mr. Gregg has more than twenty years of experience in the design and analysis of commercial and naval nuclear power plant components. He is currently the manager of the Stress & Thermal Analysis group at Curtiss-Wright Corporation in Cheswick, PA. Prior to joining Curtiss-Wright, Mr. Gregg was a Principal Engineer at Westinghouse Electric Company in Cranberry, PA where he performed stress analysis and fracture mechanics on reactor vessels, steam generators and other commercial power plant components. Mr. Gregg began his career at Bettis Atomic Power Laboratory in West Mifflin, PA where he performed stress analysis on naval power plant components.
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This chapter focuses on specific aspects that are the driving and controlling forces in hydraulic systems for nuclear power plants. It discusses how the ASME Boiler and Pressure Vessel Code requirements are implemented for Class 1, 2, and 3 nuclear pumps designed to meet the requirements of the Code. The Design Specification defines the applicable Code, the class of construction for the pump, and all operational requirements which define how the components function in their applications. The Owner’s Responsibilities for the system design play an important part in establishing the rules applicable to the Design Specification for each safety-related pump. The chapter provides a historical perspective for the Code rules, cross-referencing other Subsections of the Code. It is written to refer to and explain the requirements for pump Subarticles NB, NC, and ND-3400, and Articles NB, NC, and ND-7000 of the 2015 Edition of the Code. A Nonmandatory Appendix divides pump internal parts into various categories and sets up requirements for appropriate quality levels.
Douglas B. Nickerson was the original author of this chapter. The second and third editions were updated by Marcus N. Bressler. The fourth edition was updated by Robert E. Comman. The fifth edition was updated by Ross R. Klein. The current online edition was updated by Ross R. Klein and John V. Gregg Jr.