ML20090C434
| ML20090C434 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 07/10/1984 |
| From: | PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | |
| Shared Package | |
| ML20090C431 | List: |
| References | |
| T-250, NUDOCS 8407130297 | |
| Download: ML20090C434 (6) | |
Text
['
3840055470
)
PROCEDURE T-250, Rev.
0 Page 1 of 6 TMcHMMT (l J S3"/=9d 8f/h/f PHILADELPHIA ELECTRIC COMPANY LIMERICK GENERATING STATION T-250 REMOTE MANUAL PRIMARY CONTAINMENT ISOLATIONS 1.0 PURPOSE i
The purpose of this procedure is to provide guidance for the use of remote manual isolation valves within the RECW, SLC, RCIC, RHR, CS, HPCI, D/W CH WTR, various instrumentation system valves, and the Tip Drive Guide Tube isolation valves.
2.0 REFERENCES
2.1 M-13, 41, 42, 48, 49, 51, 52, 55, 57, 61, 87 2.2 Figure 17f-II-Cl - Traversing In-Core Probe Unit Block Diagram 2.3 T-101 RPV Control Procedure 2.4 E-465, Sh. 2 2.5 E-2569 (Connection List) 3.0 PREREQUISITES l
3.1 Reactor water level cannot be maintained above l
-167" or other reasons exist,
si remote manual isolation valves, e
4.0 PROCEDURE r407130297 840710 PDR ADOCK 05000352 NOTE 1 E
E PDR IN THE FOLLOWING SEQUENTIAL PROCE lfbr iwr EVALUATION MUST BE MADE TO ANALYZE THE SY F.
pj THE VARIOUS ISOLATIONS, TO DETERMINE WHETHER THE RESULT l
EFFECT WILL OR WILL NOT PLACE THE PLANT IN A MORE SEVERE i
PLANT CONDITION.
IF NOT, PROCEED WITH THE VALVE ISOLATIONS.
1
PROCEDURE T-2 50, Rev. O Page 2 of 6 SJW/mgd v
NOTE 2 WHEN AN UNKNOWN LEAK IS RELEASING RADIOACTIVE MATERIAL INTO THE REACTOR ENCLOSURE, REVIEW THIS PROCEDURE AND TAKE THE APPROPRIATE ACTIONS TO ISOLATE LEAK.
4.1 RECW to Recirculation Pump Cooler Isolations t
If it is suspected that a leak in the Recirculation Pump Seal Coolers is con tributing to a release of radioac tive material to the Reac tor
Enclosure:
i A.
Close the Recirculation Pump Cooling Water isolation valves HV13-106 and HV13-107, along with the Recirculation Pump Cooling Water In & Out valves HV13-108 and HV13-111.
B.
If closure of these valves do not reduce the amount of radioactive material being released into the Reactor Enclosure, re-open these valves.
I i
E 4.2 Feedwater System Isolations If it is suspected that a leak in the Reactor Feedwater system is contributing to a release of radioactive material to the Reactor
Enclosure:
A.
Check.the Reactor Feedwater Bypass valves HV41-109A,B and HV41-133A,B to insure that these valves are closed.
Close these valves if open.
4.3 Instrumentation Line Isolations If it is suspected that a leak in an instrument line is contributing to a release of radioactive material to the Reactor
Enclosure:
A.
Close the following valves indivudually and monitor the Nor th Stack radioac tivity effluent for 10 minutes:
Press. Instr. Isolation Valve HV42-147A Press. Instr. Isolation Valve HV42-147B Press. Instr. Isolation Valve HV42-147C e
Press. Instr. Isolation Valve HV42-147D
{
Supp. Pool Press. Instr. valve SV5 7-101
PROCEDURE T-2 50, Rev. O Page 3 of 6 SJW/mgd l
s-f D/W Floor Drn. Sump valve HV61-102 D/W Floor Drn. Sump valve HV61-112 D/W Floor Drn. Sump valve HV61-132 Supp. Pool Instr. Iso. valve HV55-120 Supp. Pool Instr. Iso. valve HV55-121 B.
If closure of these valves do not reduce the amount of radioactive material being released into the Reactor Enclosure, re-open valve if needed for plant operations.
4.4 Standby Liquid Control System Isolations If it is suspected that a leak in the Standby Liquid Control system is contributing to a release of radioactive material to the Reactor
Enclosure:
A.
Close the Standby Liquid Con trol Injection valves HV48-lF006A,B.
B.
If closure of these valves do not reduce the amount of radioactive material being realeased into the Reactor Enclosure, re-open these valves if required for plant operations.
4.5 RCIC System Isolations If it is suspected that a leak in the RCIC system is contributing to a release of radioactive material to the Reactor
Enclosure:
A.
Close the RCIC Suppression Pool Water Supply Isolation valve HV49-lF031.
B.
Close the RCIC Turbine Exhaust Isolation valve HV49-lF060.
C.
Close the RCIC Gland Seal Vacuum Pump Discharge valve HV49-lF002.
D.
If closure of these valves do not reduce the amount of radioactive material being released into the Reactor Enclosure, re-open these valves as necessary for plant operations, i
i PROCEDURE T-2 50, Rev. 0 Page 4 of 6 SJW/mgd s-4.6 RER System Isolations If it is suspected that a leak in the RHR systsm is contributing to a release of radioactive material to the Reactor
Enclosure:
A.
Close the RHR Pump Suction Isolation valves HV-51-lF004A,B,C,D.
B.
Close the RHR LPCI Injection Isolation valve s HV 51-lF017A, B,C,D.
C.
Close the Containment Spray Line Outboard Isolation valves HV51-lF016A,B along with the Containment Spray Line Inboard Isolation valves HV51-1F021A,B.
D.
Close the RHR Min Flow valves HV51-105A,B and the Full Flow Test Line valves RV51-125A,B.
E.
If closure of these valves do not reduce the amount of radioactive material being released into the Reactor Enclosure, re-open valves as necessary for plant operations.
4.7 Core. Spray System Isolations If it is suspected that a leak in the Core Spray system is contributing to a release of radioactive material to the Reactor
Enclosure:
A.
Close the Core Spray Pump Suctio,n Isolation valves HV52-lF001 A,B,C,D.
B.
Close the Core Spray Loop A Injection valves HV52-lF005.
C.
If closure of these valves do not reduce the amount of radioactive material being released into the Reactor Enclosure, re-open these valves as required for plant opera tion.
4.8 HPCI System Isolations If it is suspected that a leak in the HPCI sys tem is contributing to a release of radioactive material to the Reactor
Enclosure:
i 1
PROCEDURE T-250, Rev. 0 Page 5 of 6 SJW/mgd i
(_-
A.
Close the !!PCI Discharge to Feedwater valve HV55-1P105.
B.
Close the HPCI Turbine Exhaust Isolation valve HV55-lF072.
C.
If closure of these valves do not reduce the amount of radioactive material being released into the Reactor Enclosure, re-open these valves as needed for plant operations.
4.9 Drywell Chilled Water System Isolations If it is suspected that a leak in the Drywell Chilled Water system is contributing to a release of radioactive material to the Reactor
Enclosure:
A.
Close the following valves:
NOTE 1 CLOSING THESE VALVES WILL AUTOMATICALLY OPEN THE REACTOR ENCLOSURE COOLING WATER BACKUP SUPPLY VALVES EV87-124A,B(224) AND HV87-125A,B (225).
THESE VALVES MUST NOT BE OPENED.
SO BEFORE CLOSING THE DRYWELL CHILLED WATER OUTBOARD ISOLATION VALVES, LIFT THE FOLLOWING LEADS TO INSURE THAT THE i
RECW VALVES REMAIN CLOSED.
l l
Terminal Point Panel No.
i AA-43 00C681 BB-07 00C681 BB-34 00C681 BB-43 00C681 Drywell Chilled Water HV87-120A,B(220)
Outboard Isolation Valves Drywell Chilled Water HV87-121A, B ( 221)
Isolation Valves B.
If closure of these valves does not reduce the amount of radioactive material being l
released into the Reactor Enclosure, re-open these valves as required for plant opera tions,
z
I o
k PROCEDURE T-250, Rev. O Page 6 of 6 SJW/mgd w
4.10 Tip Drive Isola tions If it is suspected that a leak in the Tip Guide Tubes is contributing to a release of radioactive material to the Reactor
Enclosure:
A.
Fire the Tip Sheer valves 140A-E to isolate the guide tubes.
5.0 RETURN TO NORMAL I
5.1 Re-terminate the leads lif ted in step 4.9 t
/
Initial Verify Terminal Point Panel AA-43 00C681 BB-07 000681 BB-34 00C681 BB-43 00C681 7
e l
1
~..
..--