The status of the University of Rochester tandem Van de Graaff accelerator upgrade is reviewed. The accelerator upgrade to 18 MV consists of extended tubes, shielded resistors, deadhyphen;section ion pumping, two rotating insulating power shaft systems to provide power to the dead sections and terminal, and a pelletron charging system to replace the charging belt. Control of many of the accelerator operating systems will be done by two IBM personal computers. The negative ion injector diffusion pump, isolation transformer, preacceleration highhyphen;voltage power supply, and highhyphen;voltage corona enclosure will all be replaced. Finally, the SF6gas handling system will be improved with the addition of a second set of gas dryers and a larger recirculating pump.
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