Apparatuses for steam separation, and nuclear boiling water reactors including the same

A steam separation system comprising:

• a steam separator;
• and
• an elbow extension attached to the steam separator,
• the elbow extension including a channel,
• the elbow extension configured to receive a two-phase flow stream (FS) of water and steam from the steam separator, separate at least some water from a two-phase FS, and pass the separated at least some water through the channel and out of an exit portion of the elbow extension.

A steam separator comprising:

• a skirt;
• a barrel inside the skirt;
• a first separator stage;
• and
• a second separator stage adjacent to the first separator stage,
• the first separator stage including a first pick-off ring that protrudes from the skirt past the barrel towards an interior of the steam separator,
• the second separator stage including an inner surface which has a diameter that gradually increases from a first diameter value at a first portion of the second separator stage to a second diameter value at a second portion of the second separator stage.