Calculation and measurement of kinetic parameters of Pakistan Research Reactor-1 (PARR-1)

Rossi-Alpha (βeff/Λ) for critical reactor measured experimentally by noise analysis technique at PARR-1 core at 35.26 full power days burn up. In noise analysis technique the inherent reactivity fluctuations are taken as input to reactor system and the neutron density population fluctuations are considered as output of the reactor system. The auto power spectral density of the linear channel is taken and used to find out the break frequency by non-linear least square fitting method, which leads to βeff/Λ = 161.45 s−1. Calculations were performed with the help of computer codes WIMSD/4 and CITATION. The calculated βeff/Λ = 161.07 s−1 at 35.26 full power days burn up. The measured and calculated values for Rossi-Alpha are in good agreement within 0.235% of error.