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Seismic reinforcement of a linac installation
Martin Szegedi1, Vikren Sarkar1, Adam Paxton1
1Department of Radiation Oncology, University of Utah, Salt Lake, Utah, USA.
Journal of Applied Clinical Medical Physics
|March 8, 2021
Summary
Securing linear accelerators in seismic zones requires careful planning and adherence to building codes. Proper fixation of the linac base frame to the vault floor ensures stability and safety during earthquakes.
Area of Science:
- Medical Physics
- Civil Engineering
- Seismic Engineering
Background:
- Medical facilities in seismically active regions must comply with updated building codes for equipment installation.
- New linear accelerators (linacs) were acquired, necessitating seismic stability considerations during installation in both new and existing vaults.
Purpose of the Study:
- To detail the procedures for ensuring seismically stable installations of linear accelerators.
- To provide guidance for facilities on verifying and achieving seismic fixation requirements for linac installations.
Main Methods:
- Verification of the structural integrity and fixation of the linac base frame within existing vaults.
- Exploratory removal of grouted flooring to assess previous fixation methods.
- Analysis of local seismic load requirements and vendor-provided seismic calculations.
Main Results:
- Seismic stability requires the linac base frame to be securely fixed to the vault floor.
- Existing installations may require verification of prior fixation methods, potentially involving exploratory work.
- Prospective installations allow for direct integration of the base frame with necessary seismic strength.
Conclusions:
- Facilities must verify linac installations meet site-specific seismic requirements, using vendor calculations as a baseline.
- Understanding local seismic conditions enables cost-effective and appropriate installations.
- Adherence to seismic stability protocols is crucial for medical equipment safety in earthquake-prone areas.
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