公开(公告)号：US20220254522A1

公开(公告)日：2022-08-11

申请号：US17623701

申请日：2020-07-03

Applicant: FRAMATOME

Inventor： Pierre BARBERIS ,  Philippe LEGRAND

IPC: G21C3/07 ,  G21C21/00 ,  C22C16/00 ,  C22F1/18

Abstract: A tubular component for a pressurised-water nuclear reactor, has the following composition by weight: 0.8%≤Nb≤2.8%; traces≤Sn≤0.65%; 0.015%≤Fe≤0.40%; preferably 0.020%≤Fe≤0.35%; traces≤C≤100 ppm; 600 ppm≤O≤2300 ppm; preferably 900 ppm≤O≤1800 ppm; 5 ppm≤S≤100 ppm; preferably 8 ppm≤S≤35 ppm; traces≤Cr+V+Mo+Cu≤0.35%; traces≤Hf≤100 ppm; F≤1 ppm; the remainder being zirconium and impurities resulting from production. The tubular component has an outer surface with a roughness Ra less than or equal to 0.5 μm, obtained following a final mechanical polishing step. The outer surface has a roughness Rsk≤1 in absolute value and a roughness Rku≤10.

公开(公告)号：US20220115155A1

公开(公告)日：2022-04-14

申请号：US17275969

申请日：2019-09-12

Applicant: FRAMATOME

Inventor： Mathieu SEGOND

IPC: G21C17/108 ,  G06N3/04 ,  G21C9/00 ,  G21D3/00

Abstract: The method comprises the following steps: acquisition of a plurality of quantities characterizing the operation of the nuclear reactor; calculation of at least one critical thermal flux ratio using a deep neural network, the entries of the deep neural network being determined by using the acquired quantities, the deep neural network comprising at least two hidden layers of at least five neurons each; calculation of the deviations between the at least one calculated critical thermal flux ratio and a plurality of predetermined reference threshold values; formulation of a control signal for a reactor control system by using the calculated deviations, the control signal being: automatic reactor shutdown or alarm; do nothing; emergency shutdown of the nuclear reactor or emission of an alarm signal if relevant.

公开(公告)号：US11289216B2

公开(公告)日：2022-03-29

申请号：US16414233

申请日：2019-05-16

Applicant: Framatome Inc.

Inventor： Kenneth Wade Markham ,  David John Peckham

IPC: G21C13/024 ,  G21C13/02 ,  G21C13/028 ,  G21C13/032 ,  G21C15/10 ,  G21C19/20

Abstract: A securing device is installable on an outer circumferential surface of a nuclear reactor core shroud and in contact with an inner circumferential surface of a pressure vessel. The securing device includes a base configured for contacting the outer circumferential surface of the nuclear reactor core shroud. The securing device also includes a radial extender including an actuator, a stationary support section fixed to the base and a movable contact section. The radial extender is configured such that the movable contact section is movable along the stationary support section by the actuator to force the movable contact section radially into the inner circumferential surface of the pressure vessel.

公开(公告)号：US11287537B2

公开(公告)日：2022-03-29

申请号：US16608114

申请日：2018-04-27

Applicant: FRAMATOME

Inventor： Angéla Peterzol-Parmentier

IPC: G01T1/20

Abstract: A detector (10) for high-energy radiography includes, in the following order: a metal screen (12) arranged to receive incident radiation, at least part of the incident radiation being transmitted through the metal screen and forming a transmitted radiation, a scintillator component (14) arranged to convert the radiation transmitted by the metal screen into light, and a detection layer (16) arranged to detect the intensity of the light emitted by the scintillator component. The screen (12) is made of a metal having an atomic number that is strictly greater than 70 or is made of an alloy comprising at least 50% mass content of one or more metals having an atomic number that is strictly greater than 70 and in that the thickness of the screen is between 20 μm and 900 μm.

公开(公告)号：US11257601B2

公开(公告)日：2022-02-22

申请号：US16571262

申请日：2019-09-16

Applicant: FRAMATOME GMBH

Inventor： Thomas Fuchs ,  Kerstin Gauter

IPC: G21C19/07 ,  G21C19/40 ,  F28D1/02 ,  F28D20/00

Abstract: A nuclear facility has a fuel pool containing a liquid and an associated cooling circuit for a circulating cooling agent. The cooling circuit contains a cooling module with a first heat exchanger which immerges into the liquid, a second heat exchanger which is located outside the fuel pool, and connecting lines between the first exchanger and the second heat exchanger. In order to provide for reliable cooling even if a filling level drops, the cooling module contains a lifting body and floats in the liquid such that its altitude varies with the filling level of the liquid in the fuel pool.

公开(公告)号：US20210347653A1

公开(公告)日：2021-11-11

申请号：US17283003

申请日：2018-10-09

Applicant: FRAMATOME

Inventor： Bruno MESONA ,  André FEUGIER ,  Alain YAKOUBI

IPC: C01G43/025 ,  G21C3/62

Abstract: A conversion process for converting uranium hexafluoride into uranium dioxide includes the steps of hydrolysis of UF6 to uranium oxyfluoride (UO2F2) in a hydrolysis reactor (4) by reaction between gaseous UF6 and dry water vapour injected into the reactor (4), pyrohydrolysis of UO2F2 to UO2 in a pyrohydrolysis furnace (6) by reacting UO2F2 with dry steam and gaseous hydrogen (H2) injected into the furnace (6), extracting excess gas in the reactor (4) via a collecting device (50) comprising several filters (52), periodically cleaning the filters (52) by injecting a neutral gas into the filters (52) from the outside to the inside of the reactor (4) to remove powder stuck on the filters (52), and measuring the relative pressure in the reactor (4). The conversion method further includes carrying out point cleaning of the filters (52) when the relative pressure in the reactor (4) exceeds a predetermined point cleaning threshold.

公开(公告)号：US11043949B2

公开(公告)日：2021-06-22

申请号：US16492112

申请日：2018-03-08

Applicant: FRAMATOME

Inventor： Mathieu Allory ,  Nicolas Dupuy

IPC: G21D3/00 ,  H03K19/17728 ,  H03K19/17736 ,  H03K19/17704 ,  H03K19/1776

Abstract: A programmable logic circuit (10) for controlling an electrical facility, in particular a nuclear facility, includes an operating unit (14). The operating unit includes a plurality of types of functional blocks (FB1, FBi, FBN), two distinct types of functional blocks being suitable for executing at least one distinct function, at least one processing module suitable for receiving at least one sequence (46) of functional block(s) to be executed, and at least one internal memory (38) configured to store at least said sequence (46). The programmable logic circuit (10) includes a single functional block of each type, a given functional block being suitable for being called several times, and an execution module (22) configured to execute the called functional block(s) in series, according to said sequence (46).

公开(公告)号：US20210125739A1

公开(公告)日：2021-04-29

申请号：US17046607

申请日：2018-04-13

Applicant: Framatome Inc.

Inventor： Wade MARKHAM ,  Ryan MELCHER

IPC: G21C17/017 ,  G21C19/20 ,  G21C7/10 ,  G21C13/036

Abstract: A method for restraining a sleeve lining a tube passing through a nuclear reactor pressure vessel is provided. The method includes attaching in situ a radial protrusion on an external surface of the sleeve; and attaching a collar to an end of the tube and coupling the radial protrusion with the collar to retain the thermal sleeve in position.

公开(公告)号：US20210083671A1

公开(公告)日：2021-03-18

申请号：US16492112

申请日：2018-03-08

Applicant: FRAMATOME

Inventor： Mathieu ALLORY ,  Nicolas DUPUY

IPC: H03K19/17728 ,  H03K19/17736 ,  H03K19/1776 ,  H03K19/17704 ,  G21D3/00

Abstract: A programmable logic circuit (10) for controlling an electrical facility, in particular a nuclear facility, includes an operating unit (14). The operating unit includes a plurality of types of functional blocks (FB1, FBi, FBN), two distinct types of functional blocks being suitable for executing at least one distinct function, at least one processing module suitable for receiving at least one sequence (46) of functional block(s) to be executed, and at least one internal memory (38) configured to store at least said sequence (46). The programmable logic circuit (10) includes a single functional block of each type, a given functional block being suitable for being called several times, and an execution module (22) configured to execute the called functional block(s) in series, according to said sequence (46).

公开(公告)号：US20200347679A1

公开(公告)日：2020-11-05

申请号：US16960038

申请日：2019-01-04

Applicant: FRAMATOME

Inventor： Marc LACROIX

IPC: E21B7/18

Abstract: A boring assembly extends along a main axis and comprises a boring head comprising at least one first nozzle; at least one second nozzle, the or each second nozzle being different from the or each first nozzle; a first delivery device configured to deliver a jet of abrasive-free water at a pressure comprised between 2000 bar and 4000 bar to the at least one first nozzle; and a second delivery device configured to deliver a jet containing at least one abrasive material at a pressure comprised between 2000 bar and 6000 bar to the at least one second nozzle.