Reactivity Accident Test Results and Analyses for the Spert Iii E-Core: a Small, Oxide-Fueled, Pressurized-Water Reactor.

Analysis of the SPERT-III E-Core Using ANCK Code with the Chord Weighting Method

“…The experimental data from SPERT-III experiments, such as reactivity and reactor power, were systematically measured. From this viewpoint, the SPERT-III E-core experiments 14,15) would provide the best data to date to investigate the ANCK code and the ANCK feedback models as they gave. Power data for a wide range of reactivity accident conditions cover the core conditions and the fuel specifications of oxide-fueled typical PWRs.…”

“…In calculations for the SPERT-III E-core reactivity accident tests, the prompt moderator heating (PMH) 15,19) feedback effect is important as well. Two types of core condition, the hot startup and the hot standby conditions, were selected for the test of ANCK and ANCK/MIDAC, because the main initial conditions of the RIA calculation were HZP conditions.…”

“…The E-core fuel is composed of 4.8%-enriched UO 2 fuel rods, which are contained in stainless steel fuel assembly cans. 15) The active fuel length is 9.728 cm (38.3 in.). The E-core has 60 fuel assemblies as shown in Fig.…”

“…square. 15) These assemblies contain 25 rods in a 5 Â 5 rectangular array square with a 1.486 cm (0.585 in.) pitch.…”

“…square. 15) Each of these smaller assemblies contains 16 fuel rods arranged in a 4 Â 4 rectangular array with the same pitch as the 25-rod assemblies. Four of the 16-rod assemblies surround the centrally located transient rod guide and the remaining eight form fuel followers of the eight E-core control rods.…”