INTEGRAL ISOLATION VALVE SYSTEMS AND METHODS OF OPERATING SAME FOR LOSS OF COOLANT ACCIDENT (LOCA) PROTECTION
First Claim
1. A nuclear island comprising:
- a nuclear reactor including a nuclear reactor core comprising fissile material disposed in a reactor pressure vessel;
an emergency core cooling (ECC) system connected to the nuclear reactor through an ECC vessel feedthrough;
a reactor coolant inventory and purification system (RCIPS) connected to the nuclear reactor to inject coolant into the reactor pressure vessel through a make-up line vessel feedthrough and to extract coolant from the reactor pressure vessel through a let-down line vessel feedthrough; and
an integral isolation valve (IIV) system including;
a passive IIV comprising a check valve built into a forged flange that is connected directly to the ECC vessel feedthrough,a passive IIV comprising a check valve built into a forged flange that is connected directly to the make-up line vessel feedthrough, andan active IIV comprising an active valve built into a forged flange that is connected directly to the let-down line vessel feedthrough.
5 Assignments
0 Petitions
Accused Products
Abstract
A nuclear reactor includes a nuclear reactor core comprising fissile material disposed in a reactor pressure vessel having vessel penetrations that exclusively carry flow into the nuclear reactor and at least one vessel penetration that carries flow out of the nuclear reactor. An integral isolation valve (IIV) system includes passive IIVs each comprising a check valve built into a forged flange and not including an actuator, and one or more active IIVs each comprising an active valve built into a forged flange and including an actuator. Each vessel penetration exclusively carrying flow into the nuclear reactor is protected by a passive IIV whose forged flange is directly connected to the vessel penetration. Each vessel penetration carrying flow out of the nuclear reactor is protected by an active IIV whose forged flange is directly connected to the vessel penetration. Each active valve may be a normally closed valve.
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Citations
19 Claims
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1. A nuclear island comprising:
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a nuclear reactor including a nuclear reactor core comprising fissile material disposed in a reactor pressure vessel; an emergency core cooling (ECC) system connected to the nuclear reactor through an ECC vessel feedthrough; a reactor coolant inventory and purification system (RCIPS) connected to the nuclear reactor to inject coolant into the reactor pressure vessel through a make-up line vessel feedthrough and to extract coolant from the reactor pressure vessel through a let-down line vessel feedthrough; and an integral isolation valve (IIV) system including; a passive IIV comprising a check valve built into a forged flange that is connected directly to the ECC vessel feedthrough, a passive IIV comprising a check valve built into a forged flange that is connected directly to the make-up line vessel feedthrough, and an active IIV comprising an active valve built into a forged flange that is connected directly to the let-down line vessel feedthrough. - View Dependent Claims (2, 3, 4, 5)
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6. A nuclear island comprising:
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a nuclear reactor including a nuclear reactor core comprising fissile material disposed in a reactor pressure vessel that has a plurality of vessel penetrations that exclusively carry flow into the nuclear reactor and at least one vessel penetration that carries flow out of the nuclear reactor; and an integral isolation valve (IIV) system including; a plurality of passive IIVs each comprising a check valve built into a forged flange and not including an actuator, and one or more active IIVs each comprising an active valve built into a forged flange and including an actuator, wherein; each vessel penetration that exclusively carries flow into the nuclear reactor is protected by a passive IIV whose forged flange is directly connected to the vessel penetration, and each vessel penetration that carries flow out of the nuclear reactor is protected by an active IIV whose forged flange is directly connected to the vessel penetration. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A nuclear island comprising:
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a nuclear reactor including a nuclear reactor core comprising fissile material disposed in a reactor pressure vessel; a plurality of auxiliary systems in fluid communication with the nuclear reactor via vessel penetrations wherein each said vessel penetration is either a fluid inlet vessel penetration carrying fluid into the nuclear reactor or a fluid outlet vessel penetration carrying fluid out of the nuclear reactor; and an integral isolation valve (IIV) system including; at least one passive IIV comprising a check valve built into a forged flange and not including an actuator, and at least one active IIV comprising an active valve built into a forged flange and including an actuator, wherein; each fluid inlet vessel penetration is protected by a passive IIV whose forged flange is directly connected to the vessel penetration, and each fluid outlet vessel penetration is protected by an active IIV whose forged flange is directly connected to the vessel penetration. - View Dependent Claims (18, 19)
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Specification