07/10/2015 Version 0.0 1 - Massachusetts Institute of ...web.mit.edu/NRL/www/TRTR 2015 Editing...
Transcript of 07/10/2015 Version 0.0 1 - Massachusetts Institute of ...web.mit.edu/NRL/www/TRTR 2015 Editing...
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Radiation. Safety.
Upgrade Considerations of Replacing
Aging Neutron Flux Instrumentation
TRTR 2015 ANNUAL MEETING Presented by Ewald LIEBHART (Mirion)
Brewster (MA) / Oct. 5, 2015
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Table of contents
Standard Neutron Flux Monitoring Systems (NFMS) Introduction proTK™
Configurations of the Digital, Modular proTK™ Examples with various requirements/degrees of complexity
Summary / Conclusion
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Table of contents
Standard Neutron Flux Monitoring Systems (NFMS) Introduction proTK™
Configure the Digital, Modular proTK™ Examples with various requirements/degrees of complexity
Summary / Conclusion
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Radiation. Safety.
proTK™ NFMS - Applications in PWRs & Research Reactors
Neutron Flux Range Code Detector Signal
Processing
Electronics
Quantities Position Type
Start-up
Range
Pulse
Range SRM
Ex-core
B10- or BF3- Proportional
Counter
Start-up Channel
DAK 250-i
2 … 3
Channels*
Intermediate
Range IRM
Compensated
Ion. Chamber
KNK 50 SAC
Start-up Channel
DAK 250-g
2 … 4
Channels*
Wide Range WRM
Ex-core
Wide-Range
Fission Ch.
Wide Range
Channel
DWK 250
3 … 4
Channels
Power
Range
Power
Range PRM
Uncompensated
Ion. Chamber
KNU 50
Power Range
Channel
DGK 250
8 … 16
Detectors,
4 DGK
Flux
Distribution
Monitoring
In-core SPN Detector
Power
Distribution
Channel DLK
250
18 … 36 det.
3 … 6 DLK
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Modular, multi-microprocessor system with a
separate microprocessor for the safety signal path
Cycle time of signal processing starting with 5 ms
Low heat C-MOS technology
Software fixed in EPROM, efficient self monitoring
Remote signal generators and signal simulation
Qualified according to KTA 3501/3505, IEC 60 880
proTK™ - Features
Simple &
Clear
Fast
Safe
Reliable
Testable
Type-tested
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Table of contents
Standard Neutron Flux Monitoring Systems (NFMS) Introduction proTK™
Configurations of the Digital, Modular proTK™ Examples with various requirements/degrees of complexity
Summary / Conclusion
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Radiation. Safety.
Example of Renewing Existing Installations in a RR
Replacement of all nuclear instrumentation
the
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... „seamless“ replacement of aging instrumentation ...
Replacement of all nuclear instrumentation at a RR
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... „seamless“ replacement of aging instrumentation ...
Example: Safety Channels for the Neutron Flux Level with DGK 250 M
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• For the replacement of the 4 „Safety Channels for
the Neutron Flux Level “ a modified power range
channel DGK 250 M has been developed
• The signal processing of the DGK 250 M was
designed to exactly replace the „old“ equipment:
same input signals, same output signals, same
response times, identical signal processing
• The new SW of the DGK 250 M has been type
tested according to IEC 60880 and KTA 3503/3505
... „seamless“ replacement of aging instrumentation ...
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Picture of one of the safety channels that have
been replaced by DGK 250 M channels
... „seamless“ replacement of aging instrumentation ...
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DGK 250 channel with customer specific SW for the
replacement of the safety channels
... „seamless“ replacement of aging instrumentation ...
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... „seamless“ replacement of aging instrumentation ...
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... „seamless“ replacement of aging instrumentation ...
Certificate, issued by TÜV Nord
for the SW of the type tested,
customized power range channel
DGK 250 M.
Type Test according to KTA 3503/3505 and IEC 60880.
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New proTK™ Channels after Installation
... „seamless“ replacement of aging instrumentation ...
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Example of Renewing Existing Installations in a RR
Start-up Channel with 16 linear measuring ranges
Replacement of the Automatic Flux Control Channel
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• DAK 250 with 16 linear measuring ranges
• 2 Variants:
- DAK 250-i: Detector signal: 0.1 ... 5e6 cps
- DAK 250-g: Detector signal: 0.1 pA ... 1 mA
• Output signals for the linear measuring ranges
- Analog Signal in the range from 0...10V in combination with
- Indication of selected measuring range (binary signal) (BCD
signal or 16 relay contacts available)
• Range switching options
- Automatic
- Only with permission form the operator (via push buttons)
Start-up Channel with 16 linear measuring ranges
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• Extension/combination of the linear measuring
ranges of the DAK 250 and the DWK 250, to
include the pulse range and Campbell range of
the fission chamber. The picture shows the
indicator for the currently selected range.
Start-up & Wide Range Channels with Combined Linear Measuring Ranges
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Example of a New Installation in a Research Reactor
Remote Control System (RCS)
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System Structure: List of Neutron Flux Monitoring Channels
NMS Channel Tag No. Channel
Type ID Tag / Device_ID /
Plant code RS 485
Bus address
RPS
Ch. A xxx-003A DWK 250 xxx-003A-W 0
DGK 250 xxx-003A-G 1
Ch. B xxx-003B DWK 250 xxx-003B-W 2
DGK 250 xxx-003B-G 3
Ch. C xxx-003C DWK 250 xxx-003C-W 4
DGK 250 xxx-003C-G 5
RRS
Ch. A yyy-001 DWK 250 yyy-001-W 6
DGK 250 yyy-001-G 7
Ch. B yyy-002 DWK 250 yyy-002-W 8
DGK 250 yyy-002-G 9
Ch. C yyy-003 DWK 250 yyy-003-W 10
DGK 250 yyy-003-G 11
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System Structure: Block Diagramm
Ethernet crossover cable
xxx
xxx
xxx
yyy
yyy
yyy
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Formula to calculate the new calibration factor value:
𝐶𝐹𝑛𝑒𝑤 = 𝐶𝐹𝑜𝑙𝑑 ∗𝑃𝑡ℎ [% 𝐹𝑃]
𝑃𝑛𝑣 %𝐹𝑃
• Pth Reference power level (current thermal power level) in %FP Entered by the operator in the first stage of the FPA
• Pnv Neutron flux based reactor power measurements in %FP Sampled form the selected channel during the FPA process by the RCS
• CFold Old calibration factor value Read from the selected channel during the FPA process by the RCS
• CFnew New calibration factor value Calculated by the RCS during the FPA process; CFnew is sent to the selected
channel
FPA: Calculate the new calibration factor CFnew
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Example of Support Equipment for Periodical Testing
Test „Trolley“ For Automatic Testing
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• With proTK™ Mirion offers a full range of neutron flux monitoring
channels for BWR, PWR and test, research and training reactors.
• These neutron flux monitors are designed and qualified for providing
signals of highest safety standards, i.e. for the reactor protection
system (RPS) and also fast signals for reactor control
• The modularity of SW and HW allows its implementation virtually any
NPP or other nuclear facility (existing or new).
• The qualified SW and HW can be configured to meet most needs.
Where needed SW or HW modules can be adapted.
SUMMARY / CONCLUSION