Reactivity control mechanisms for a HPLWR fuel assembly
Conference
·
OSTI ID:20979653
- Forschungszentrum Karlsruhe, Institute for Nuclear and Energy Technologies, 76021 Karlsruhe (Germany)
- EnBW Kernkraft GmbH, 7666 Philippsburg (Germany)
A parametric study of different reactivity control mechanisms has been performed for the cross section of a single fuel assembly of a High Performance Light Water Reactor using the Monte Carlo code MCNP5. The fuel temperature feedback, known as the Doppler Effect, and the coolant density feedback have been determined for fresh UO{sub 2} fuel in a large range of fuel and coolant temperatures. The local shutdown reactivity of different control rods with different absorber materials has been predicted. The neutron flux inside the control rods, the power profile in the fuel pins with and without control rods and the coolant density coefficient have been evaluated for future core optimization. Methods to improve the power profile with additional absorbers mounted outside the fuel cluster have been studied exemplarily. (authors)
- Research Organization:
- American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
- OSTI ID:
- 20979653
- Country of Publication:
- United States
- Language:
- English
Similar Records
Spatial weighting of Doppler reactivity feedback
Critical experiments on gadolinium poisoned cluster-type fuel assemblies in heavy water lattices
Comparison of reactivity feedback models for the FFTF passive safety tests
Technical Report
·
Wed Nov 30 23:00:00 EST 1977
·
OSTI ID:6803075
Critical experiments on gadolinium poisoned cluster-type fuel assemblies in heavy water lattices
Journal Article
·
Fri Dec 31 23:00:00 EST 1982
· Nucl. Sci. Eng.; (United States)
·
OSTI ID:5493947
Comparison of reactivity feedback models for the FFTF passive safety tests
Conference
·
Mon Feb 29 23:00:00 EST 1988
·
OSTI ID:7013301