ML20090C434

Rev 0 to Procedure T-250, Remote Manual Primary Containment Isolations

ML20090C434
Person / Time
Site:	Limerick
Issue date:	07/10/1984
From:	PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
Shared Package
ML20090C431	List: ML20090C429 ML20090C434
References
T-250, NUDOCS 8407130297
Download: ML20090C434 (6)

Text

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[' 3840055470 PROCEDURE T-250, Rev. 0 )

$ Page 1 of 6 TMcHMMT (l J l

S3"/=9d 8f/h/f l PHILADELPHIA ELECTRIC COMPANY  !

LIMERICK GENERATING STATION l

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 iwr lfbr EVALUATION MUST BE MADE TO ANALYZE THE SY F. pj THE VARIOUS ISOLATIONS, TO DETERMINE WHETHER THE RESULT l

i EFFECT WILL OR WILL NOT PLACE THE PLANT IN A MORE SEVERE PLANT CONDITION. IF NOT, PROCEED WITH THE VALVE ISOLATIONS.

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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 If it is suspected that a leak in the Recirculation t

Pump Seal Coolers is con tributing to a release of radioac tive material to the Reac tor

Enclosure:

A. Close the Recirculation Pump Cooling Water i

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 l , SJW/mgd 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:

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PROCEDURE T-250, Rev. 0 l

Page 5 of 6  ;

SJW/mgd i

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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 l the amount of radioactive material being

! released into the Reactor Enclosure, re-open '

these valves as required for plant opera tions ,

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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

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Initial Verify Terminal Point Panel AA-43 00C681 BB-07 000681 BB-34 00C681 BB-43 00C681 7

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