A Comparative Evaluation of Containment Spray Additives. Detrimental Impacts of an Inadvertant Spray Actuation

摘要

This report presents the results of an engineering analysis of detrimental health and economic impacts of inadvertent operation of a containment spray system. Injection spray solutions of plain water, boric acid, boric acid with hydrazine, boric acid with sodium hydroxide, and sodium borate with sodium thiosulfate were considered in the present study. It was concluded that none of the solutions would represent an acute toxicity problem to people in the containment vessel at the time of an unwanted spray system trip. Also, corrosion to safety-related equipment was found to be negligible. The major effect of spray additive type in an inadvertent spray operation appears to be the level of effort required to recover from the incident. None of the detrimental effects brought to light in this study appear to play a determining role in the selection of spray additive type.