公开(公告)号：US20240312650A1

公开(公告)日：2024-09-19

申请号：US18228635

申请日：2023-07-31

Applicant: GE-Hitachi Nuclear Energy Americas LLC

Inventor： Brian S. Hunt ,  Christer N. Dahlgren ,  Wayne Marquino

IPC: G21C9/004 ,  G21C1/02 ,  G21C1/08 ,  G21C9/016 ,  G21C9/033 ,  G21C13/02 ,  G21C13/087 ,  G21C13/093 ,  G21C15/18 ,  G21C17/04

CPC classification number: G21C9/004 ,  G21C1/028 ,  G21C1/086 ,  G21C9/016 ,  G21C13/02 ,  G21C15/18 ,  G21C9/033 ,  G21C13/087 ,  G21C13/093 ,  G21C17/042

Abstract: Nuclear reactors have very few systems for significantly reduced failure possibilities. Nuclear reactors may be boiling water reactors with natural circulation-enabling heights and smaller, flexible energy outputs in the 0-350 megawatt-electric range. Reactors are fully surrounded by an impermeable, high-pressure containment. No coolant pools, heat sinks, active pumps, or other emergency fluid sources may be present inside containment; emergency cooling, like isolation condenser systems, are outside containment. Isolation valves integral with the reactor pressure vessel provide working and emergency fluid through containment to the reactor. Isolation valves are one-piece, welded, or otherwise integral with reactors and fluid conduits having ASME-compliance to eliminate risk of shear failure. Containment may be completely underground and seismically insulated to minimize footprint and above-ground target area.

公开(公告)号：US20210090753A1

公开(公告)日：2021-03-25

申请号：US16582638

申请日：2019-09-25

Applicant: GE-Hitachi Nuclear Energy Americas LLC

Inventor： Derek Bass ,  Christer N. Dahlgren

IPC: G21C19/307 ,  G21C15/243 ,  G21D1/00 ,  F22B35/00

Abstract: Combined cleanup and heat sink systems work with nuclear reactor coolant loops. Combined systems may join hotter and colder sections of the coolant loops in parallel with any steam generator or other extractor and provide optional heat removal between the same. Combined systems also remove impurities or debris from a fluid coolant without significant heat loss from the coolant. A cooler in the combined system may increase in capacity or be augmented in number to move between purifying cooling and major heat removal from the coolant, potentially as an emergency cooler. The cooler may be joined to the hotter and colder sections through valved flow paths depending on desired functionality. Sections of the coolant loops may be fully above the cooler, which may be above the reactor, to drive flow by gravity and enhance isolation of sections of the coolant loop.

公开(公告)号：US20200321136A1

公开(公告)日：2020-10-08

申请号：US16888766

申请日：2020-05-31

Applicant: GE-Hitachi Nuclear Energy Americas LLC

Inventor： Brian S. Hunt ,  Christer N. Dahlgren ,  Wayne Marquino

IPC: G21C9/004 ,  G21C1/08 ,  G21C1/02 ,  G21C15/18 ,  G21C13/02 ,  G21C9/016

Abstract: Nuclear reactors have very few systems for significantly reduced failure possibilities. Nuclear reactors may be boiling water reactors with natural circulation-enabling heights and smaller, flexible energy outputs in the 0-350 megawatt-electric range. Reactors are fully surrounded by an impermeable, high-pressure containment. No coolant pools, heat sinks, active pumps, or other emergency fluid sources may be present inside containment; emergency cooling, like isolation condenser systems, are outside containment. Isolation valves integral with the reactor pressure vessel provide working and emergency fluid through containment to the reactor. Isolation valves are one-piece, welded, or otherwise integral with reactors and fluid conduits having ASME-compliance to eliminate risk of shear failure. Containment may be completely underground and seismically insulated to minimize footprint and above-ground target area.