Safety & Compliance

Demonstrably increased safety for Nyrstar


With around 460 employees, Nyrstar produces approximately 290,000 tonnes of very high-quality zinc per year in Budel-Dorplein in the province of North-Brabant. The company strives for maximum returns on the use of the mineral resources and by-products that it manufactures. The company attaches great importance to safety. In order to continuously improve, Nyrstar asked KH Engineering to improve safety at the location in a structured way and to demonstrate the higher level of safety to the government.


For this assignment, Nyrstar called on KH Engineering’s (HSE) Safety Engineering department. In order to meet the client’s needs, we carried out HAZOP studies with Nyrstar. This is a recognised method of identifying process risks for each plant component. Nyrstar employees were trained in the HAZOP methodology and the implementation of a better software package for the registration of the HAZOP sessions and the follow-up of the various actions were ensured.

In addition to process safety, KH Engineering also classified instrumental safety using the SIL (Safety Integrity Level) methodology. KH Engineering thus demonstrates the reliability of the safety instruments. And Nyrstar can take proportional measures to continuously improve safety, in accordance with the Layer Of Protection Analysis (LOPA) method. A team of discipline specialists from Nyrstar carried out these studies, under the chairmanship of an independent specialist from KH Engineering.

We updated the required documentation, which provides insight into the explosion hazard within the ATEX framework. In addition, KH Engineering advised the client on minimising the risk of potential ignition sources.


KH Engineering closely supervised the process, carried out an assessment of the system according to the client’s wishes and government requirements, and advised on measures to continuously improve safety.

Benefits to the client

Because KH Engineering shared its knowledge with the Nyrstar team, the safety level was systematically increased and also made more demonstrable. Relevant industrial expertise and the latest methods were applied during the project. The quality of the studies meets the latest industry standards, enabling Nyrstar to make well-founded decisions and demonstrate to the government that the correct actions have been taken.
Better control of the production process and good collaboration with Nyrstar have not only reduced the risks but have also enabled Nyrstar to increase production capacity.

KH Engineering activities

• Independent chairmanship of the safety study team
• HSSE Engineering
• HAZOP studies
• ATEX studies
• ATEX area classification
• SIL classification and verification
• Advice and guidance on transitioning to new documentation software PHA_Pro and BowTie XP
• Identification of control measures.
• Preparing recommendations for further improvements in the procedures.

Projectleider: Twan van den Broek

Click here for more information about Nyrstar

More projects: