Details

Autor(en) / Beteiligte

• Teuchert, E.
• Rütten, H.J.

Titel

Core physics and fuel cycles of the pebble bed reactor

Ist Teil von

• Nuclear engineering and design, 1975-01, Vol.34 (1), p.109-118

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

1975

Link zum Volltext

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• A high degree of flexibility for the application of the pebble bed HTR results from the size of the fuel elements and the continuous loading of fuel during operation. The OTTO loading scheme (once-through-then-out) allows the gas outlet temperature to be increased up to 1190°C as desired. Different fuel cycles can be used in the same reactor. The highly enriched uranium/thorium fuel cycle allows favourable utilization of the fissile reserves. For a conventional design the net consumption is 467 g/GWd(th), and this figure can be reduced to 58 g/GWd(th) for the advanced variant, achieving the breeding ratio 0.95. The advantage of the low enrichment uranium fuel cycle is the direct in situ utilization of the bred plutonium, being as high as 87%, which reduces the demand for short-term recycling. The reactor allows change over between the different cycles under full power operation.