公开(公告)号：US20220406478A1

公开(公告)日：2022-12-22

申请号：US17851682

申请日：2022-06-28

申请人： ROLLS-ROYCE SMR LIMITED

发明人： Brenton D SHEARER ,  James C PALMER ,  Benjamin J IRELAND

IPC分类号： G21C9/004 ,  F16K17/04 ,  F16K31/06

摘要： A depressurisation valve for a cooling system including a main chamber having a main valve, a pilot line having a secondary valve and a blowdown line; the main valve being located to seal a path of the coolant system of the nuclear reactor. The main chamber is connected to the cooling circuit via the pilot line allowing coolant to enter the main chamber, and the blowdown line allows coolant to escape from the main chamber, the pilot line having a lower fluid resistance than the blowdown line. The pressure of coolant in the main chamber maintains the main valve in a closed position, and under elevated temperature and/or pressure conditions fluid is prevented from entering the main chamber via a closure of the secondary valve on the pilot line and reduce the pressure from the valve, moving it to its open position.