Rossi-{alpha} experiment in the IPEN/MB-01 research reactor: Validation of two-region model and absolute measurement of {beta}{sub eff} and {Lambda}
- Instituto de Pesquisas Energeticas e Nucleares, IPEN/CNEN-SP, Cidade Universitaria, Av. Prof. Lineu Prestes 2242, 05508-000, Pinheiros Sao Paulo-SP (Brazil)
A new method for absolute measurement of the effective delayed neutron fraction, {beta}{sub eff}, and the prompt neutron generation time, {Lambda}, based on Rossi-{alpha} experiments and the Two-Region Model was developed at the IPEN/MB-01 Research Reactor facility. In contrast with other techniques like the Slope Method, Nelson-Number Method and {sup 252}Cf- Source Method, the main advantage of this new methodology is to obtain the parameters in a purely experimental way, eliminating all parameters that are difficult to measure or calculate. In this way, Rossi-{alpha} experiments for validation of this method were performed at the IPEN/MB-01 facility. The final results agree well with values from frequency analysis experiments and show uncertainties of 1.46% and 0.97% for {beta}{sub eff}, and {Lambda} respectively. This work supports the reduction of the {sup 235}U thermal yield as proposed by Okajima and Sakurai. (authors)
- Research Organization:
- American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
- OSTI ID:
- 22039595
- Resource Relation:
- Conference: PHYSOR-2006: American Nuclear Society's Topical Meeting on Reactor Physics - Advances in Nuclear Analysis and Simulation, Vancouver, BC (Canada), 10-14 Sep 2006; Other Information: Country of input: France; 18 refs.
- Country of Publication:
- United States
- Language:
- English
Similar Records
A Noise Analysis Approach for Measuring Effective Delayed Neutron Parameters in the IPEN/MB-01 Reactor
Heavy reflector experiments in the IPEN/MB-01 reactor: Stainless steel, carbon steel and nickel