Analysis of the Management Strategies for the Ageing Process of a Nigeria Research Reactor

Abstract

This study focuses on the management strategies for the anticipated ageing process of a Nigerian research reactor (NIRR-1) which was acquired by the Federal Government in 2004 for the purposes of isotopes production and training. It was conducted using a semi-empirical method in which a questionnaire was used as the research instrument. The reliability index of the instrument was 75.4 %. Ageing indicators, causative factors and its detection mechanisms for NIRR-1 facilities were identified in the questionnaire and tested by subjecting them to respondent's opinions. From the results obtained, change in appearance (or colour), shape and size of facility, loss of weight of facility, equipment failure and leakage of radiation were accepted as ageing indicators for NIRR-1 based on a response mean > 3.0. Also, time, obsolescence, low integrity design, fire accident and severe service conditions were accepted as causative factors of NIRR-1 ageing, while heat oxidation, surface corrosion, erosion and microbial growth on NIRR-1 facility were accepted as detection mechanisms for ageing. One of the outcomes of this study is the draft algorithmic guideline for NIRR-1 ageing management.