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Fusion Science and Technology
Latest News
WIPP improves utility shaft safety, begins infrastructure project
Harrison Western Shaft Sinkers (HWSS), the company drilling a new utility shaft at the Department of Energy’s Waste Isolation Pilot Plant in New Mexico, has retained a safety culture expert following a near-miss accident in the shaft late last year. The safety expert will conduct monthly facilitated discussions with crews working on the shaft to reinforce expectations for identifying concerns regarding unsafe circumstances, according to a recent report by the Defense Nuclear Facilities Safety Board (DNFSB).
M. M. Menon, C. B. Baxi, G. L. Campbell, J. T. Hogan, G. L. Laughon, M. A. Mahdavi, R. Maingi, P. K. Mioduszewski, L. W. Owen, E. E. Reis, M. J. Schaffer, K. M. Schaubel, J. P. Smith, R. D. Stambaugh, M. R. Wade
Fusion Science and Technology | Volume 27 | Number 4 | July 1995 | Pages 355-363
Technical Paper | Experimental Device | doi.org/10.13182/FST95-A30356
Articles are hosted by Taylor and Francis Online.
A particle exhaust scheme, employing a cryocon-densation pump in the outboard divertor region under a baffle, has been installed and operated in the DIII-D tokamak. The cryopump provides toroidally symmetric pumping at a rate of 30 000 to 40 000 ℓ/s for D2 in the pressure range of 1 to 4 mTorr. Pressures in the 2 to 3 mTorr range are routinely observed under the baffle. This translates to particle exhaust throughputs of ∼100 Torr ℓ/s. The exhaust throughput could be controlled by selecting the position of the plasma strike region with respect to the opening to the baffle chamber. The pump has been used quite effectively for plasma density control.