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Koeberg’s plant status system
September 2014, IT in Manufacturing


Eskom’s Koeberg nuclear power station is a critical asset in the company’s portfolio and even more critical to its rapidly-growing customer base in the Western Cape. Managing Koeberg’s advanced technology requires expert supervision by qualified engineers and managers who need to know everything from the station’s performance and status to prevailing weather patterns in real time, even when not on site.

Each nuclear plant in the world needs a structured emergency plan in place to cope with the event of a nuclear accident. Koeberg has a dedicated group of people that focuses and plans for an event that should never happen. Every year, exercises are carried out to simulate a nuclear accident in order to evaluate the plant’s response and the effectiveness of the emergency plan. This does not only include Koeberg, but also the local emergency services in Cape Town. During these exercises Koeberg and Eskom also have the support of Areva and EdF emergency response teams in France. The Plant Data System mimics to be developed by this project would allow these teams to see and access plant information more easily, thereby enabling them to make faster and more informed decisions.

Project scope

Following the requirement of the Institute of Nuclear Power Operations (INPO) AP-913 Equipment Reliability Process, Koeberg needed a tool that would help implement the performance monitoring aspect of the specification. This was to be an enhancement to the ArchestrA-based Plant Data System solution that was already in place and using similar technology to that used at Eskom’s Integrated Generation Control Centre at its head office at Megawatt Park.

System topology.
System topology.

In addition, the system would need to provide an overview as well as detailed visualisations of the plant status and KPIs (eg. nuclear core temperatures, cooling temperatures, generated power) to plant engineers as well as senior managers and executives who are not necessarily on site 24/7, or even in South Africa, so that they could remotely monitor the plant and diagnose any issues. The system would also need to provide accurate weather information and plume directions as well as assistance in the training of operators, engineers and managers.

All mimics would have to be displayed in real time and be easily understood, distributable, remotely accessible, web enabled and secure.

Solution selection

Because of a long and successful relationship with Eskom, the company chose Bytes Universal Systems, one of the largest system integrators in South Africa, for the implementation. Bytes is a certified Wonderware ArchestrA system integrator specialising in the EMI and MOM domains, experience that was key to the successful outcome of this project.

“We would be using the existing Wonderware System Platform, Historian and Information Manager for the implementation,” says Gerhard Greeff, operations manager at Bytes Universal Systems. “These solutions were initially used on the Plant Data System project and at that time, were chosen for their ability to gather real-time information as well as for enabling the definition and animation of powerful graphics. The Wonderware Information Server is a versatile and key solution for the secure display and distribution of real-time data and calculations to various workstations via the web portal.”

System overview

The system is configured for remote monitoring and is available across the entire Eskom business network and on the Internet via a controlled and secure VPN, but is not configured for control of the plant. The mimics are hosted and displayed on the business network, with all the data obtained from the plant’s control network.

The system uses redundant Application Object Servers collecting data from the plant as well as redundant Information Servers which are the main portals for everyone accessing the Koeberg mimics. Should one of the Information Servers have an issue, users can switch over to the redundant URL.

The online mimics provide everyone from the plant operator to the plant manager and even the Eskom CEO access to real-time plant status information. The mimics range from easy-to-understand overview screens to more detailed plant areas and weather information. The mimics were a great innovation for the larger Plant Data System project as it set the standard for other sites to follow – they also comply with European standards. They have a main overview that shows a high-level status of the various areas of the plant, from there engineers can drill down for more detailed mimics which focus on operations.

Implementation

“The average template for each mimic took around one week,” says Greeff. “After the initial pilot mimics were designed, approved and implemented, they were used as an example for engineers in the various plant areas to describe the functionality and benefits of the technology. Once we had buy-in from them, they assisted with providing information and design for the specific value-adding mimics in their area of expertise. Any changes they suggested were easily made within ArchestrA and republished throughout all the various nodes where the mimics are viewed.”

The system was developed within an existing live environment with no effect on production. For the testing of the user displays, a special engineering group was created on the Wonderware Information Server and only selected personnel from both the end user and the system integrator had access to the system for testing purposes before it was made available to a wider audience.

All the required software development (i.e. special calculations and the interface to the weather data) was done within ArchestrA. Bytes had also previously developed a web-based Remote Event Notification solution for mobile devices which is fully integrated with the Wonderware Historian so that engineers and managers can configure their own SMS or e-mail alerts should one or multiple tag values exceed specific conditions.

Once the mimics were made available within Eskom, they spread like wildfire from the control level to top senior managers at both Koeberg and at Head Office where all monitoring mimics that were already implemented for Koeberg in Eskom’s Integrated Generation Control Centre were replaced with these new versions.

“The system is being extended to Koeberg’s Emergency Control Centre for training purposes as well as to explain how a nuclear power station operates,” says Houston Carstens, chief engineer, Koeberg. “The National Nuclear Regulator, Nuclear Emergency Control Centre as well as the City of Cape Town Municipality will also be included in the loop for viewing these mimics.”

Benefits

* Easily accessible information to all levels of management reduces decision-making time when an issue is identified as all concerned can work from the same information even if they are not in the same location.

* Early fault identification and escalation prevented a unit shutdown when the mimics indicated an issue of which the plant operators were unaware.

* Visuals are available to assist with performance reviews and diagnostics.

* Local process engineers have remote access to visuals that reduce fault diagnostic times when they are not on site.

* Using the same overview mimics during training (on the simulator) and on the plant ensures proper skills transfer and familiarity with the effects of process control changes.

For more information contact Jaco Markwat, Wonderware Southern Africa, +27 (0)11 607 8100, jaco.markwat@wonderware.co.za, www.wonderware.co.za


Credit(s)
Supplied By: IS³ - Industry Software, Solutions & Support
Tel: +27 11 607 8100
Fax: +27 11 607 8478
Email: contact@is3.co.za
www: www.is3.co.za
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