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it is all about the Safety of People and the Environment –
… and how to Mitigate and Manage Risks and Cost.

Radiation Protection & Shielding, PTCOG61, 2023
Proton FLASH, ARC, Activation, Monte Carlo


Obtaining Permits

Every new facility requires a radiation shielding design and a radiation safety assessment. In some cases also the environmental impact must be assessed. The details are typically spelled out in local regulations. The regulatory bodies may not be specialized in the type of facility you want to build and as a result, they may have special requirements that are not always written into the regulations.

Starting the regulatory process with a sound proposal, and not with questions, sets the track for a speedy regulatory permit approval. Dr. Joern Meissner has been recognized by many regulatory bodies world wide as an expert in radiation safety for proton therapy.

Radiation Shielding

Every facility is unique in terms of proton therapy vendor’s technology, local regulations, treatment delivery mode, clinical workload and other parameters. The radiation shielding design, even if initially proposed by the vendor, needs to be verified if it fits for the specific local requirements.

We provide shielding calculations using either line-of-sight analytical models (for instance according to DIN6875-20, NCRP144, GBZ/T 201.5-2015 or other local standards) or by Monte Carlo simulations.

Personnel Safety & Training

Access to the radiation areas is a key concern. It must be safe and simple. Only simplicity of the procedures really ensure that nobody will try to bypass them. Meissner Consulting prepares procedures and specifies the access safety system and dose monitoring.

Training plays a key role in personnel safety. The IAEA recommends recurrent training at least once a year and many regulating authorities have made this mandatory.
Dr. Joern Meissner has been invited to lecture on radiation safe and efficient facility design during the past few PTCOG educational workshops. He is considered a radiation safety expert by several regulators worldwide.

We also provide customized radiation safety training in your facility.

Emissions & Environmental Aspects

Activation of cooling water, air, water and soil is a typical concern. An assessment on the impact of the release of any activated material is important not only to convince the regulatory body, but also the neighbors. As any facility is different, the assessment needs to consider the beam technology, workload, shielding, and ventilation systems of the specific facility. If exhaust stack monitoring is required, we can also provide cost effective solutions together with our partners.

Have you considered the emission standards in your area? They maybe more stringent than their appearance in the respective regulations. Some countries regulate the effect on persons or the environment, others set exhaust activity limits – or both.

Management of Activated Parts, Materials and Waste

High energy beams generate radioactivity. This radioactivity remains also when the beam is turned off. Some of these activated parts may need maintenance or replacement during the life of your facility. Some parts may need to be disposed of if they cannot be repaired and re-used.
We develop concepts for handling, receiving, shipping and disposing of radioactive parts, and resolve regulatory aspects.

We deliver designs for radio isotope laboratories complying with IAEA, ICRP, ICRU guidelines and your local regulations. We are using DIN 24 425 and other technical norms as the basis for our designs. Our expertise in gamma ray spectroscopy and other measurement methods allows us to customize the laboratory to your purpose. We guide you through the selection process for hotcell, fume hood, clean room vendors, and we support you with radioactive materials permit applications. For your operation, we support you with SOPs, Training, Corrective Actions and Preventive Actions (CAPA).

Decommissioning Plan

Also building materials may be activated by the prompt radiation from the accelerated beam. Over time, the radioactivity will build up and may reach values that require a decommissioning concept. A wise choice of building materials and construction methods in the building design phase can significantly reduce the amount of radioactivity generated. Already in the permit application phase, the regulatory body often requires a decommisioning concept and adequate funds to be available at the end-of-life of the facility.
Our expertise will help to design the facility for easy decommissioning.

Risk and Cost Mitigation

Executive and project management experience, combined with our know-how by having designed the shielding layout for all Varian Particle Therapy projects, Meissner Consulting provides cost effective and safe solutions.

Case study for radioactivity induced in shielding material – and how to reduce radioactive waste

We enable beam performance with technical know-how and business acumen!