Fuel Route

Lamourelle, A. P. McKnight, J., and Nelson, D. E., Clean Fuels Route to Low Sulfur Low Aromatic Diesel, in NPRA Annual Meeting. 2001. New Orleans, Louisiana, March 18-20,. AM-01-28. 

Plutonium Finishing. For both THORP and Magnox plants the plutonium nitrate is chemically conditioned and mixed with oxalic acid to precipitate the oxalate. After filtering and drying the resulting powder is calcined to convert it to dioxide powder. The material is then sent to a purpose built store prior to recycling via the MOX (mixed oxide) fuel route ... 

Within the Central Electricity Generating Board (CEGB), the "double contingency" principle is adopted in considering criticality in the CAGR fuel routes. Thus, at least two Independent low-probability events must occur before criticality can be reached. For clearances based on calculations a criterion is adopted that if one such event takes place, the cMculated Keff plus an appropriate allowance for uncertainties should be <0.95. This uncertainty allowance includes a systematic component and a random component, statistics plus data, etc., taken at the three standard deviation levels. Two computer codes are employed, the lattice code WIMS (Ref. 1) for survey work and the Monte Carlo cbcle MONK (Ref. 2) for... 

Several of these faults will influence the control system from the point of view of safety or plant downtime The fuel route control system interlocks are laid down by the CEGB in Reference 2, which also quantifies the recommended reliability for different classes of interlock A discussion on the achievement of the recommended reliabilities is beyond the scope of this paper, which will confine itself to the role of fail-safe, self-diagnostic PES design, and their general influence on reliability considerations ... 

CEGB Standard 500117 Principles of Nuclear Fuel Route Interlock and Control System . GDCD Standard 194. April 1980. 

SAFETY ASSESSMENT METHODS FOR NEW AGR FUEL ROUTE CONTROL SYSTEMS A BRADLEY... 

Within the fuel route there are 4 main centres of plant control and interlocking, namely the fuelling machine (the control system is carried "on board"), the irradiated fuel dismantling cell, the ponds and the maintenance cells. Because of its varied duties the fuelling machine control system is the largest and most complex of those listed and is considered in detail in this paper. The same philosophy and methods, however, have been applied to all 4 systems. 

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