Purging of Boiler Circulating Water Pump

1.5 Purging of Boiler Circulating Water Pump
1. Verify closed cooling water is aligned to boiler circulating water pumps prior to filling:
a) Closed cooling water supply valve SG03-9 (21) open
b) Closed cooling water control valve inlet isolation valve SG03-11 (22) open
c) Closed cooling water control valve SG03-1 (66) in Auto
d) Bypass SG03-216 closed
e) Emergency thermal barrier cooling valve SG03-2 closed
2. Verify boiler circulating pump thermal barrier valves are locked open:
a) Boiler circulating pump 11/21
i) Thermal barrier supply valve SG03-20
ii) Thermal barrier return valve SG03-28 (16)
b) Boiler circulating pump 12/22
i) Thermal barrier supply valve SG03-21
ii) Thermal barrier return valve SG03-29 (16)
c) Boiler circulating pump 13/23
i) Thermal barrier supply valve SG03-22
ii) Thermal barrier return valve SG03-30 (16)
d) Boiler circulating pump 14/24
i) Thermal barrier supply valve SG03-23
ii) Thermal barrier return valve SG03-31 (16)
3. Verify boiler circulating pumps closed cooling water return header is aligned as follows:
a) Closed cooling water return control valve inlet isolation valve SG03-15 (62) is open
b) Closed cooling water return control valve inlet SG03-3 (67) in Auto
c) Closed cooling water return control valve outlet isolation valve SG03-17 (62) is open
d) Bypass SG03-217 closed
e) Emergency thermal cooling drain SG03-4 closed (vlv 14 open)
4. Close or Verify Closed boiler circulating pump suction valve as appropriate:
a) Boiler circulating pump 11/21 suction valve SG03-5 (2)
b) Boiler circulating pump 12/22 suction valve SG03-6 (2)
c) Boiler circulating pump 13/23 suction valve SG03-7 (2)
d) Boiler circulating pump 14/24 suction valve SG03-8 (2)
5. Close or Verify Closed boiler circulating pump discharge valve as appropriate:
a) Boiler circulating pump 11/21 discharge valves SG03-126 (3), and SG03-127 (3)
b) Boiler circulating pump 12/22 discharge valves SG03-128 (3), and SG03-129 (3)
c) Boiler circulating pump 13/23 discharge valves SG03-130 (3), and SG03-131 (3)
d) Boiler circulating pump 14/24 discharge valves SG03-132 (3), and SG03-133 (3)
6. Close boiler water circulating pump bypass valves as appropriate:
a) Boiler circulating pump 11/21 bypass valves SG03-94 (5), and SG03-106 (6)
b) Boiler circulating pump 12/22 bypass valves SG03-95 (5), and SG03-108 (6)
c) Boiler circulating pump 13/23 bypass valves SG03-96 (5), and SG03-110 (6)
d) Boiler circulating pump 14/24 bypass valves SG03-97 (5), and SG03-112 (6)
7. Open drain valves (44) and (18).
8. Verify Closed Strainer drain valves SG03-44, and SG03-45.
9. Close boiler circulating pump motor cavity isolation valve:
a) Boiler circulating pump 11/21 motor cavity valve SG03-246 (10A)
b) Boiler circulating pump 12/22 motor cavity valve SG03-247 (10A)
c) Boiler circulating pump 13/23 motor cavity valve SG03-248 (10A)
d) Boiler circulating pump 14/24 motor cavity valve SG03-249 (10A)
10. Close boiler circulating pump motor cavity cooling water valve:
a) Boiler circulating pump 11/21 motor cavity cooling water SG03-250
b) Boiler circulating pump 12/22 motor cavity cooling water SG03-251
c) Boiler circulating pump 13/23 motor cavity cooling water SG03-252
d) Boiler circulating pump 14/24 motor cavity cooling water SG03-253
11. Open bypass valves and vent valves:
a) SG03-102 (5A), SG03-107 (6A), (7), and (57)
b) SG03-103 (5A), SG03-109 (6A), (7), and (57)
c) SG03-103 (5A), SG03-111 (6A), (7), and (57)
d) SG03-104 (5A), SG03-113 (6A), (7), and (57)
12. Verify low pressure fill spool piece is removed and outlet isolation valve SG03-39 (50) is closed.
13. Open boiler circulating pumps high pressure fill isolation valve SG03-36 (38).
14. Open boiler circulating pumps fill strainer inlet (SG03-42) isolation valve.
15. Blowdown fill line through fill strainer drain valves SG03-44, and SG03-45.
16. Open boiler circulating pumps fill outlet (SG03-43) isolation valves.