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Safety
H157655_1_008 17
2.6 Safety from Nearby Construction
In a magnet system hazards come basically from two sources:
• Mechanical breakdown of the mounting suspension in the magnet system.
• Quench as a result of mechanical movement of the superconductor and as a result the
magnet reaching a critical temperature.
No permanent damage results from the mechanical movement of the superconductor,
however when the suspension is damaged, it must be repaired.
These amplitudes are mainly in the vertical direction. For permanent faults we give a
maximum peak value of 0.01 g (0.981 m/s
2
) for systems with activated ADI or API dampers.
Undamped systems can be operated up to a maximum of 1 mg or 9.81 mm/s
2
. NMR
measurements are not possible in these vibration entries.
For short term accelerations, which can occur during earthquakes, we have experienced that
the NMR magnet systems survive a strength of 6.0 or accelerations up to 0.2 g > 90%.
2.7 Country-Specific Safety Regulations
In addition to the above safety precautions, any country-specific safety regulations for
operating NMR systems must be fulfilled. These may include, for example, regulations on:
• Facilities of a controlled access area around the magnet
• Working conditions at computer stations
• Use of anesthesia gases
• Handling of laboratory and transgenic animals
2.8 Emergency Planning
Due to the strong magnetic fields and presence of cryogens when using NMR systems, it is
important to define and communicate what to do in case of problems or an emergency. An
Emergency Plan can be defined as a documented set of instructions on what to do if
something goes wrong. Emergency Plans are often defined as part of the Standard Operating
Procedures (SOP), or as a stand-alone document. In any case every NMR laboratory should
have an Emergency Plan in effect.
As every organization has its own policies and procedures, as well as varying laboratory
layouts, an Emergency Plan should be individually defined by the customer for their
laboratory as appropriate. The Emergency Plan is the responsibility of the customer and of
the building and facility management.