Document: 10 CFR Part 50
Document ID: 95bb6c95-4469-43d8-aa77-b4d3038159b8
Document Type: cfr
Title: Definitions.
Source: 10 CFR Part 50
Source URL: https://www.ecfr.gov/current/title-10/part-50/section-50.2
Revision Date: 
Chapter: 
Section ID: 50.2
CFR Part: 50
CFR Title: 10

Content:
of U-235 and has fission product activity not in excess of 0.25 millicuries of fission products per gram of U-235, and ( iii ) facilities in which processing is conducted pursuant to a license issued under parts 30 and 70 of this chapter , or equivalent regulations of an Agreement State, for the receipt, possession, use, and transfer of irradiated special nuclear material, which authorizes the processing of the irradiated material on a batch basis for the separation of selected fission products and limits the process batch to not more than 100 grams of uranium enriched in the isotope 235 and not more than 15 grams of any other special nuclear material. Prototype plant means a nuclear reactor that is used to test design features, such as the testing required under § 50.43(e) . The prototype plant is similar to a first-of-a-kind or standard plant design in all features and size, but may include additional safety features to protect the public and the plant staff from the possible consequences of accidents during the testing period. Reactor coolant pressure boundary means all those pressure-containing components of boiling and pressurized water-cooled nuclear power reactors, such as pressure vessels, piping, pumps, and valves, which are: ( 1 ) Part of the reactor coolant system, or ( 2 ) Connected to the reactor coolant system, up to and including any and all of the following: ( i ) The outermost containment isolation valve in system piping which penetrates primary reactor containment, ( ii ) The second of two valves normally closed during normal reactor operation in system piping which does not penetrate primary reactor containment, ( iii ) The reactor coolant system safety and relief valves. For nuclear power reactors of the direct cycle boiling water type, the reactor coolant system extends to and includes the outermost containment isolation valve in the main steam and feedwater piping. Research and development means ( 1 ) theoretical analysis, exploration, or