EP2984653A1 - Dispositif de traitement de signaux detectes par des detecteurs de neutrons et dispositif de controle commande associe - Google Patents
Dispositif de traitement de signaux detectes par des detecteurs de neutrons et dispositif de controle commande associeInfo
- Publication number
- EP2984653A1 EP2984653A1 EP14713508.1A EP14713508A EP2984653A1 EP 2984653 A1 EP2984653 A1 EP 2984653A1 EP 14713508 A EP14713508 A EP 14713508A EP 2984653 A1 EP2984653 A1 EP 2984653A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pulses
- series
- neutron detectors
- clock
- switches
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000004992 fission Effects 0.000 claims description 16
- 238000001514 detection method Methods 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008054 signal transmission Effects 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T3/00—Measuring neutron radiation
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
- G21C17/108—Measuring reactor flux
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/36—Control circuits
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Definitions
- the invention relates to a device for processing signals detected by neutron detectors and the associated nuclear reactor core control device.
- the control and protection of the core of a civil nuclear power reactor is currently ensured by the use of multi-section neutron detectors providing a continuous signal that covers the height of the core to measure the neutron flux and the axial distribution of power. emitted by the reactor core.
- Each neutron detector provides a detection signal that is transmitted to the control room.
- the electrical system that transmits the detection signals to the control room consists of a plurality of cables (there are as many cables as detectors). Such a system is complex in structure and its maintenance is often difficult to implement. It is an expensive system. Moreover, the quality of certain electrical connections may not be excellent because of poor impedance matching of certain connections. Detected signals can then be partially reflected.
- the transmission system of the invention does not have these disadvantages.
- the invention relates to a signal processing device detected by a set of n neutron detectors, the device comprising: switches each having an input and an output, each switch receiving, on its input, a detected signal coming from a different detector, the outputs of the n switches being connected together, and
- a clock generator which comprises a clock circuit and a sequential counter controlled by the clock circuit and able to simultaneously deliver a plurality of series of pulses, each series of pulses of the plurality of series of pulses; constituting the control signal of a different switch, the pulses of any two sets of pulses of the plurality of sets of pulses being temporally disjointed.
- the signal processing device comprises means for widening the pulse width of at least a first series of pulses with respect to the pulse width of at least a second series of pulses. pulses.
- the signal processing device further comprises means for electrically isolating the switches from a high DC power supply voltage of the neutron detectors.
- This characteristic of the invention is implemented in the case where the high DC power supply voltage of the neutron detectors is present where the detection signal is taken.
- the invention also relates to a nuclear reactor core control device which comprises a plurality of neutron detectors and a signal processing device according to the invention.
- the neutron detectors are fission chambers.
- FIG. 1 shows the block diagram of an example of a control device which comprises a detection signal transmission system according to the invention
- FIG. 2 represents the block diagram of an example of a detection signal transmission system according to the invention
- FIGS. 3A-3D represent clock signals associated with the transmission system of FIG. 2;
- FIGS. 4 and 5 illustrate two different modes of operation of an example of a detection signal transmission system of the invention.
- FIG. 1 represents the block diagram of an exemplary control device which comprises a device for processing detection signals of the invention.
- a transmission line L and an electrical bushing T make it possible to extract from building B the signal delivered by the processing device D.
- the neutron detectors of the control device are fission chambers.
- the neutron detectors are, for example, ionization chambers with boron deposition compensated or not with gamma rays, proportional counters with boron deposition, etc.
- FIG. 2 represents the block diagram of an exemplary detection signal processing device of the invention.
- the processing device D. of the invention comprises n analog switches.
- the sequential counter Sq comprises three cascaded clock circuits Hi, H 2 , H 3 .
- the clock circuit H operates preferentially autonomously in astable configuration.
- the clock signal delivered by the clock circuit H controls the clock circuit Hi of the sequential counter.
- the clock signal Ci delivered by the clock circuit Hi controls the clock circuit H 2 of the sequential counter and constitutes the control signal of the switch Ki.
- the clock signal delivered by the clock circuit H 2 controls the clock circuit H 3 which delivers a clock signal which constitutes the control signal C 2 of the switch K 2 .
- the frequency and the duty cycle of the clock signals delivered by the clock circuits Hi, H 2 , H 3 are adjustable using components.
- FIG. 3A represents the clock signal h delivered by the clock circuit H and FIGS. 3B, 3C, 3D respectively represent the clock signals hi, h 2 , h 3 delivered by the respective clock circuits Hi, H 2 , H 3 .
- the clock signal h 2 is not used as a switch control signal.
- the clock signals hi and h 3 constitute the control signals Ci and C 2 of the respective switches K 1 and K 2 .
- the duration in the high state of the signal delivered by the clock circuit H 2 makes it possible to define the time in the low state between the output of the clock circuit Hi and the output of the clock circuit H 3 .
- the frequency as well as the duty cycle of the input signal of the sequential counter are defined so that the duration in the low state is identical between the signal C 2 and the signal Ci and between the signal Ci and the signal C 2 .
- the different currents i, (t) are collected at the output of the processing device D to form a total current i T (t) which is the sum of the currents i, (t).
- FIGS. 4 and 5 illustrate two different modes of operation of a detection signal transmission system of the invention consisting, by way of non-limiting example, of two transmission paths.
- the control signals Ci and C 2 consist, respectively, of two series of pulses of the same frequency and the same width.
- a pulse that participates in the series of pulses constituting the control signal Ci is located, in time, equidistant from two successive pulses which constitute the signal C 2 and vice versa.
- the control device can identify the appearance of the fault, but it is not possible to identify the fission chamber that has the default.
- the width of the current pulses ii (t) is set to be different from the width of the current pulses i 2 (t).
- the width of the current pulses i 2 (t) is set greater than the width of the pulses of current ii (t). This is achieved by a judicious choice of the clock signals which constitute the control signals of the switches K 1 and K 2 .
- a selection time is then defined for the currents delivered by the different fission chambers different from one fission chamber to the other.
- the current i T (t) consisting of currents ii (t) and i 2 (t) is then digitized.
- the digitization of the current i T (t) leads to obtain a different number of digital samples for each fission chamber. It is thus possible to identify the fission chambers. As soon as a fault appears on a fission chamber, it is then possible to identify the chamber concerned by this fault.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Measurement Of Radiation (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1353197A FR3004272B1 (fr) | 2013-04-09 | 2013-04-09 | Dispositif de traitement de signaux detectes par des detecteurs de neutrons et dispositif de controle commande associe |
| PCT/EP2014/056452 WO2014166776A1 (fr) | 2013-04-09 | 2014-03-31 | Dispositif de traitement de signaux detectes par des detecteurs de neutrons et dispositif de controle commande associe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2984653A1 true EP2984653A1 (fr) | 2016-02-17 |
Family
ID=48979906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14713508.1A Withdrawn EP2984653A1 (fr) | 2013-04-09 | 2014-03-31 | Dispositif de traitement de signaux detectes par des detecteurs de neutrons et dispositif de controle commande associe |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20160070009A1 (fr) |
| EP (1) | EP2984653A1 (fr) |
| JP (1) | JP6461094B2 (fr) |
| FR (1) | FR3004272B1 (fr) |
| WO (1) | WO2014166776A1 (fr) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL279979A (fr) * | 1961-06-22 | 1900-01-01 | ||
| JPS4947465B1 (fr) * | 1968-09-14 | 1974-12-16 | ||
| US3827026A (en) * | 1971-01-04 | 1974-07-30 | Honeywell Inf Systems | Encoding technique for enabling a device to process different types of digital information transmitted along a single information channel |
| US4568514A (en) * | 1981-07-06 | 1986-02-04 | Gamma-Metrics | Fission chamber detector system for monitoring neutron flux in a nuclear reactor over an extra wide range, with high sensitivity in a hostile environment |
| JPH0980159A (ja) * | 1995-09-13 | 1997-03-28 | Toshiba Corp | 出力領域監視装置 |
| FR2776914B1 (fr) * | 1998-04-03 | 2000-06-23 | Thomson Tubes Electroniques | Procede d'acquisition de mesures et tomodensitometre a detecteurs groupes |
| JP4825443B2 (ja) * | 2004-05-11 | 2011-11-30 | 株式会社東芝 | X線ct装置、放射線検出器および放射線検出器における電気信号の読出方法 |
| JP5598905B2 (ja) * | 2010-02-26 | 2014-10-01 | 独立行政法人日本原子力研究開発機構 | 中性子イメージ検出方法及びその方法を用いた中性子イメージ検出器 |
-
2013
- 2013-04-09 FR FR1353197A patent/FR3004272B1/fr active Active
-
2014
- 2014-03-31 US US14/783,335 patent/US20160070009A1/en not_active Abandoned
- 2014-03-31 JP JP2016506848A patent/JP6461094B2/ja not_active Expired - Fee Related
- 2014-03-31 WO PCT/EP2014/056452 patent/WO2014166776A1/fr not_active Ceased
- 2014-03-31 EP EP14713508.1A patent/EP2984653A1/fr not_active Withdrawn
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2014166776A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016516207A (ja) | 2016-06-02 |
| FR3004272A1 (fr) | 2014-10-10 |
| WO2014166776A1 (fr) | 2014-10-16 |
| US20160070009A1 (en) | 2016-03-10 |
| FR3004272B1 (fr) | 2015-05-15 |
| JP6461094B2 (ja) | 2019-01-30 |
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