Verification of Iron Cross-sections based on Reactivity Effect of Iron Reflectors in a LWR Core

Abstract

Iron reflects fast neutrons well and a thick iron reflector makes a core more reactive than a water reflector. Based on the fact, an advanced pressurized water reactor (APWR) employs a stainless steel radial reflector. Verification of iron cross- section data is important from a reactor core design viewpoint. Therefore, iron cross-sections of ENDF/B-VI, JENDL-3.2 and the preliminary version of JENDL-3.3 were tested against a critical experiment that demonstrates reactivity effect of iron reflectors in a light-water-moderated core

Keywords:

• iron reflector
• baffle/reflector
• albedo
• reactivity effect
• fuel cycle cost
• TCA
• APWR
• MCNP
• ENDF/B-VI
• JENDL-3.2
• JENDL-3.3