Passive containment cooling system for boiling water reactor and method of installation

A boiling water reactor comprising:

• a reactor building including,
• a top wall defining a penetration therein,
• a bottom wall, and
• at least one side wall, the top wall, the bottom wall, and the at least one side wall defining a chamber in the reactor building;
• a reactor cavity pool adjacent the reactor building;
• a primary containment vessel, at least a portion of the primary containment vessel is in the chamber of the reactor building;
• and
• a passive containment cooling system configured to receive water and expel hot water, the passive containment cooling system including,
• at least one thermal exchange pipe including,
• an outer pipe having a first outer pipe end and a second outer pipe end, the first outer pipe end being closed and the second outer pipe end being open, the first outer pipe end being within the primary containment vessel, and the second outer pipe end extending through the penetration in the top wall of the reactor building and into the reactor cavity pool such that the outer pipe is in fluid communication with the reactor cavity pool, the outer pipe including,
• a side pipe wall defining an opening therein, and
• an inner pipe at least partially within the outer pipe, the inner pipe having a first inner pipe end and a second inner pipe end, the first inner pipe end and the second inner pipe end being open, and the second inner pipe end extending out of the outer pipe and into the reactor cavity pool such that the second inner pipe end is in fluid communication with the reactor cavity pool, the inner pipe including,
• a curved portion between the first inner pipe end and the second inner pipe end, the curved portion extending through and past the opening in the side pipe wall and into the reactor cavity pool.