The paper addresses the issue of cold pressurisation during a Non-Loss of Coolant Accident (non-LOCA) and steam line break events. Cold pressurisation is usually avoided during reactor start up from cold and shut down to cold but it has to be avoided even during accidents so that consequential failures do not occur. A non-LOCA event, such as isolation of containment on a spurious signal and two main steam line breaks have been analysed. It is observed that the transient behaviour of the system is similar in these events. This paper discusses the issue of cold pressurisation in these events.