10.0   Conclusions

10.1   Facility is Safe to Operate

A set of fire scenarios based on identified fuels and possible ignition sources has been presented. A qualitative risk assessment has been made for each scenario. The level of risk is approximately the same for most of the identified scenarios; no one sce nario presents significantly greater risks. In no case has it been found that a clearly possible fire scenario results in a severe loss (risk class 3). Operation of the facility with the mitigations given in this document may be undertaken with an accepta ble level of risk. A summary of hazards and their risk classes is given in See Also: A summary of scenarios and risk classes. The relevant mitigations are summarized in each individual scenario section.

TABLE 11. A summary of scenarios and risk classes.

Scenario

Risk Class

See Also: Drift Chamber Low Voltage On-board Electronics Ignites Cables

2

See Also: Drift Chamber Low-Voltage Power Ignites Cables at Disconnect

1

See Also: High Current Electronics Ignites Cables by Inadequate Connection

2

See Also: High Current Fast Electronics Ignites Cables by Sparking

2

See Also: Minitorus Magnet Supply Ignites Cables by Inadequate Connection

2

See Also: Pair Spectrometer Magnet Supply Ignites Cables by Sparks

1

See Also: Photomultiplier Tube Base Ignites Time-of-Flight Detectors

2

See Also: Transient Electrical Device Ignites Cable

2

See Also: Target Failure Causes Hydrogen Explosion by Sparks

2

See Also: Welding or Grinding Ignites Cable or Scintillator by Sparks

2

10.2   Level of Safety can be Improved

A number of improvements can be made to decrease the total fire risk. These are detailed in See Also: Future Upgrades. Most of these would provide only incremental improvement. A significant improvement, however, would be obtained by providing automatic, early-stage, clean fire suppression systems for each fuel. Although developing such a system is a multi-year research project, the total fire risk would be significantly smaller.