Seismic qualification of re-circulatory type cooling water system at RLG

At Radiological Labs. (RLG), BARC, Trombay, there are number of electrically operated high temperature high thermal capacity equipment which are usually operated in confined environment like Glove Boxes (GBs). They require continuous cooling water of significant quantities during operation as well as for safe shutdown condition. Presently these equipment's are cooled with normal water on once-through basis. This mode of cooling not only consumes huge quantities of normal water but also generates same quantity of liquid effluent to be treated. Though an emergency cooling water system is available at present to cater emergency situations like failure of normal water supply, the system has active components like pumps and needs manual intervention. To overcome these shortfalls, it is proposed to set up a gravity fed (passive) re-circulatory type cooling water system. This paper deals with the seismic qualification of the proposed re-circulatory type cooling water system at RLG. It also discusses in details that how final supporting arrangements have been arrived at to take care of various loadings on the system. (author)