Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8174505 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2015 | 6 Pages |
Abstract
A zero power multiplying assembly in subcritical regime serves as a benchmark for validating subcritical reactor physics. The utilization of a subcritical assembly for the determination of nuclear parameters in a multiplying medium requires a well-defined neutron flux to carry out the experiments. For this it is necessary to know the neutron flux profile inside a subcritical system. A compact subcritical assembly BRAHMMA has been developed in India. The experimental channels in this assembly are typically less than 8Â mm diameter. This requires use of miniature detectors that can be mounted in these experimental channels. In this article we present the thermal neutron flux profile measurement in a compact subcritical system using indigenously developed miniature gas filled neutron detectors. These detectors were specially designed and fabricated considering the restrictive dimensional requirements of the subcritical core. Detectors of non-standard size with various sensitivities, from 0.4 to 0.001Â cps/nv were used for neutron flux of interest ranging from 103 to 107 n-cmâ2Â sâ1. A comparison of measured neutron flux using these detectors and simulated Monte Carlo calculations are also presented in this article.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Mayank Shukla, Shraddha S Desai, Tushar Roy, Yogesh Kashyap, Nirmal Ray, Shefali Bajpai, Tarun Patel, Amar Sinha,