Back to results
US 10,706,975 B2Granted
Operating floor confinement and nuclear plant
AssigneeKabushiki Kaisha Toshiba
InventorsTakashi Sato, Keiji Matsumoto, Keisuke Taguchi
Life of this patent
Estimating the term…
Abstract
An operating floor confinement has an operating floor, a sidewall that surrounds the operating floor, a ceiling that is provided on an upper portion of the sidewall, a reactor well, a fuel pool, a dryer and separator pit, an equipment hatch that is provided on the sidewall, an air lock that is provided on the sidewall, and an isolation valve that is provided in a penetration line. The operating floor confinement forms a pressure boundary having pressure resistance and a leakage protection function. The operating floor confinement is separated from an equipment area of the reactor building and has no blowout panel.
Claims8
An operating floor confinement that constitutes part of a nuclear plant, the nuclear plant including:
- a reactor pressure vessel that houses a core;
- a dry well housing the reactor pressure vessel and having a top slab;
- a wet well housing a suppression pool in its lower portion and a gas phase in its upper portion;
- a LOCA vent pipe connecting the dry well and the suppression pool;
- a containment vessel that includes at least the dry well, the LOCA vent pipe and the wet well;
- a containment vessel head;
- a main steam line;
- and
- a reactor building including an equipment area that houses a section of the main steam line, wherein
- the operating floor confinement is fluidically isolated from the equipment area of the reactor building and forms a pressure boundary that has pressure resistance that is at least the same level as that of the containment vessel and a leakage protection function, wherein the operating floor confinement comprises:
- a reactor well that surrounds the containment vessel head and is in contact with the containment vessel via the containment vessel head,
- an operating floor that is provided around the reactor well, the operating floor having a larger area than a cross-sectional area of the dry well, wherein the operating floor constitutes a part of the pressure boundary and has no staircase, elevator, elevator shaft, or equipment hatch that communicates with the equipment area of the reactor building,
- a sidewall that surrounds the operating floor, the sidewall being arranged wider than the cross-sectional area of the dry well, wherein the sidewall constitutes a part of the pressure boundary and has no blowout panel,
- a ceiling that is provided on an upper portion of the sidewall, constitutes a part of the pressure boundary and has no blowout panel,
- a fuel pool extending horizontally beyond the top slab of the dry well and constituting a part of the pressure boundary,
- a dryer and separator pit extending horizontally beyond the top slab of the dry well and constituting a part of the pressure boundary,
- an equipment hatch that is provided on the sidewall,
- an air lock that is provided on the sidewall,
- a penetration line that passes through the sidewall, and
- an isolation valve that is provided on the penetration line.
17 more elements
A nuclear plant comprising:
- a core;
- a reactor pressure vessel that houses the core;
- a dry well housing the reactor pressure vessel and having a top slab;
- a wet well housing a suppression pool in its lower portion and a gas phase in its upper portion;
- a LOCA vent pipe connecting the dry well and the suppression pool;
- a containment vessel that includes at least the dry well, the LOCA vent pipe and the wet well;
- a containment vessel head;
- a main steam line;
- a reactor building including an equipment area that houses a section of the main steam line;
- and
- an operating floor confinement that is fluidically isolated from the equipment area of the reactor building and forms a pressure boundary that has pressure resistance that is at least the same level as that of the containment vessel and a leakage protection function, wherein the operating floor confinement includes:
- a reactor well that surrounds the containment vessel head, constitutes the pressure boundary and is in contact with the containment vessel via the containment vessel head,
- an operating floor that is provided around the reactor well, the operating floor having a larger area than a cross-sectional area of the dry well, wherein the operating floor constitutes a part of the pressure boundary and has no staircase, elevator, elevator shaft, or equipment hatch that communicate with the equipment area of the reactor building,
- a sidewall that surrounds the operating floor, the sidewall being arranged wider than the cross-sectional area of the dry well, wherein the sidewall constitutes a part of the pressure boundary and has no blowout panel,
- a ceiling that is provided on an upper portion of the sidewall, constitutes a part of the pressure boundary and has no blowout panel,
- a fuel pool extending horizontally beyond the top slab of the dry well and constituting a part of the pressure boundary,
- a dryer and separator pit extending horizontally beyond the top slab of the dry well and constituting a part of the pressure boundary,
- an equipment hatch that is provided on the sidewall,
- an air lock that is provided on the sidewall,
- a penetration line that passes through the sidewall, and
- an isolation valve that is provided on the penetration line.
18 more elements
Dependencies are inferred from the claim text.