Reactor coolant pressure boundary
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.