PATENT CLAIM ANALYSIS

Application Number: 15901249
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-09
Patent Classification: ["376", "298000"]

Abstract:
A nuclear reactor cooling system with passive cooling capabilities operable during a loss-of-coolant accident (LOCA) without available electric power. The system includes a reactor vessel with nuclear fuel core located in a reactor well. An in-containment water storage tank is fluidly coupled to the reactor well and holds an inventory of cooling water. During a LOCA event, the tank floods the reactor well with water. Eventually, the water heated by decay heat from the reactor vaporizes producing steam. The steam flows to an in-containment heat exchanger and condenses. The condensate is returned to the reactor well in a closed flow loop system in which flow may circulate solely via gravity from changes in phase and density of the water. In one embodiment, the heat exchanger may be an array of heat dissipater ducts mounted on the wall of the inner containment vessel surrounded by a heat sink.

Claim (Index 19):
A passive reactor cooling system usable after a loss-of-coolant accident, the system comprising:\n a metal containment vessel in thermal communication with an external annular water-filled reservoir which defines a heat sink; a monolithic concrete structure disposed inside the containment vessel and defining a reactor well; a vertically elongated reactor vessel having a lower portion disposed in the reactor well and an upper portion, the reactor vessel containing primary coolant and a nuclear fuel core heating the primary coolant which is circulated between the reactor vessel and a steam generator in a closed primary coolant flow loop; a cooling water tank disposed inside the containment vessel and containing an inventory of emergency cooling water in selective fluid communication with the reactor well via at least one flow conduit controlled by a dump valve, the dump valve having a closed position preventing flow of cooling water to the reactor well and an open position providing flow of cooling water to the reactor well; and a heat exchanger comprising a plurality of longitudinal heat dissipater duct attached to an inside surface of the containment vessel, the heat exchanger in fluid communication with the reactor well and cooling water tank via a closed cooling water flow loop in which flow is driven via gravity; wherein following a loss of primary coolant, the cooling water tank is configured and operable to flood the reactor well with cooling water which is converted into steam by heat from the fuel core and flows through the closed cooling water flow loop to the heat dissipater ducts; and wherein the steam condenses in the heat dissipater ducts via rejection of heat to the heat sink forming condensate which flows via gravity back to the cooling water tank via the closed cooling water flow loop.

Metadata:
- Claim Count in Document: 36.0
- Percentile: 88.0
- Lexical Diversity: 1.81818
- Patent Class: 376.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14289545', '14289525', '14423149', '15729376', '14403082']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7314006310254733
- 35 USC 102 Novelty (BERT): 0.6198864069735687
- Combined Prediction Score: 0.7202492086202829
- Mean Citation Score: 506.479712
- Max Citation Score: 597.58655
- Similarity Product: 522.3233861940682

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test