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Nuclear new build procurement considerations
It may seem counterintuitive, but the best time to enhance the ability to support operations and maintenance for a new plant is before construction starts. This is one of many lessons learned by the currently operating nuclear fleet. As construction and startup of many nuclear facilities was completed, it quickly became evident that the ability to efficiently support operations and maintenance was limited. Most of the information necessary to establish and manage procurement of spare and replacement items, maintenance, and configuration of the facilities was unavailable and had to be gathered on a case-by-case, “on-demand” basis. Absence of necessary information and the associated challenges resulted in the need for staff augmentation and multiyear-long projects to develop equipment bills of material and maintenance programs and to perform technical evaluations for the huge quantities of spare and replacement items being requested.
J. H. Degnan, W. L. Baker, M. L. Alme, C. Boyer, J. S. Buff, J. D. Beason, C. J. Clouse, S. K. Coffey, D. Dietz, M. H. Frese, J. D. Graham, D. J. Hall, J. L. Holmes, E. A. Lopez, R. E. Peterkin, Jr., D. W. Price, N. F. Roderick, S. W. Seiler, C. R. Sovinec, P. J. Turchi
Fusion Science and Technology | Volume 27 | Number 2 | March 1995 | Pages 115-123
Experimental Device | Special Section: Pulsed High-Density Systems | doi.org/10.13182/FST95-A30368
Articles are hosted by Taylor and Francis Online.
Electromagnetic implosions of shaped cylindrical aluminum liners that remain at solid density are discussed. The approximate liner parameters have an initial radius of 3 to 4 cm, are 4 cm in height, and are ∼0.1 cm thick. The liners are driven by the Shiva Star 1300-µf capacitor bank at an 84-kV charging voltage and an ∼30-nH total initial inductance (including implosion load). The discharge current travels along the length of the liner and rises to 14 MA in ∼8 µs. The implosion time is ∼12 µs. Diagnostics include inductive current and capacitive voltage probes, magnetic probes, and radiography. Both right-circular cylinder and conical liner implosion data are displayed and discussed. Radiography indicates implosion behavior substantially consistent with two-dimensional magnetohydrodynamic calculations, which predict inner surface implosion velocities exceeding 20 km/s, and compressed density of two to three times solid density. Less growth of perturbations is evident for the conical liner (∼1% thickness tolerance) than for the right-circular cylindrical liner (∼3% thickness tolerance).