The Core Verification System outputs a substantial amount of data throughout its operation and stores it
on redundant devices: the internal hard drive and the external USB memory stick. The NM200E output provides three alternative, user
friendly file options: CSV, PDF and PNG.
The standard, CSV file format contains a sequential list of all data present
in an XML file of the core map, separated by commas. By converting a core
map XML file into a CSV file, the data can then be easily imported into
common word processors, such as Microsoft Excel.
The PDF file is the primary means of reviewing the results of the core mapping process, providing both an
overview of the entire core with information and statistics about the mapping performed, as well as detailed information on each individual
fuel assembly, including s-hole locations and gap measurements.
PNG Image Files
Images of fuel assemblies at each mapping stop in the core are automatically taken and stored. The system may be directed to capture
individual images as well. All images are tagged as to their location, date and time.
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Core Verification System, please contact:
Features of NM200E Core Verification Software
In this UI screen shot, the NM200E software has identified
the core baffle and has found the location of all s-holes at
this position of the mapping head. The software has recorded
global coordinates of the fuel assemblies as well as the gaps
between them and has determined that all are within tolerance.
The accuracy of the NM200E Core Verification System is based on proprietary Newton-developed machine
vision software algorithms that accurately identify and measure the positions of all fuel assemblies in a PWR reactor and compares
them with ideal positions (supplied by the reactor operators) even in the presence of significant thermals.
The sophisticated software enables the precise global mapping of fuel assembly positions, including any degree of misalignment or nozzle rotation, while compensating for the visually distorting issues of thermal turbulence and light refraction.
NM200Esoftware determines the positions of Westinghouse and AREVA PWR fuel assemblies based in part upon s-hole positions, and it is also able to map the more symmetrical Babcock and Wilcox nozzles.
There are two software applications that are provided with the NM200E system:
- The utility application that allows the user to easily input all desired core and mapping specifications and
- The mapping
application with the main user interface to guide the user through the core mapping operation.
Both applications run on the control box utilizing the Ubuntu Linux operating system. No prior knowledge of the Linux operation
system is required to operate the system.
Core Layout Utility Application
The Core Layout Utility has the following functions:
- Specify layout patterns for used and new fuel assemblies
- Specify gaps globally, or on a per-row or per-column basis
- Specify the North cardinal direction in relation to the core layout
- Specify the mapping head positions (stops) to be used for the core mapping
- Modify global settings such as the site name, label order and nozzle dimensions
Core Mapping Application
The Core Verification System is the primary application and interface used to perform a core mapping. During deployment, it displays
processed images from the mapping head, and guides the operator through the mapping procedure by providing instructions and feedback
on the current status of the process.
On the NM200E operator's console the actual s-hole positions of individual nozzles are graphically superimposed upon the "ideal"
or "design" locations. Out-of-tolerance s-holes are immediately apparent and their precise locations are digitally recorded for
Pre-Deployment Data Input Requirements
Before deployment and mapping can begin, a number of parameters relating to the reactor vessel and fuel need to be identified and entered into the NM200E software. An outage questionnaire for the NM200E Core Verification System has been developed that lists all the required information needed for the NM200E software to function properly.
The necessary information includes:
- Site name and reactor number, which is used primarily for annotating all data and documents produced by the system.
- Detailed measurements about the fuel and baffle plates are needed. The NM200E uses these values to help locate the s-holes in a global reference frame based on the baffle locations.
- Configuration of the core must be specified. This includes the number of fuel assemblies, fuel bundle re-load plan, and the ideal nozzle gaps. All of this information is used during both the mapping process and generation of results data.
Learn more about deploying the NM200E and core mapping process HERE.