Unstable behavior of Boiling Water Reactors (BWRs) is known to occur during operation at certain power and flow conditions. This paper reports the results of a preliminary investigation of the impact of uncertainty neutronic parameters on the prediction of the stability of the BWR within the framework of OECD Ringhals-1 stability benchmark. The time domain code TRACE/PARCS was used in the analysis and sensitivity calculations were performed for every neutronic parameter which was anticipated to affect the stability prediction of the reactor. The overall objective of the work here was to identify parameters most significantly affecting the stability phenomena in the Ringhals-1 stability benchmark. Using selected parameters, an uncertainty method based on the propagation of code input errors was used to obtain tolerance limits for the decay ratio and the frequency prediction. The scope of the uncertainty study reported in this paper was limited to the neutronic effects. Further studies will include other effects to include thermal-hydraulic parameters and modeling effects.