ML17299B047

Rev 1 to Operations Procedure 42AO-2ZZ50, Venting Charging Pumps.

ML17299B047
Person / Time
Site:	Palo Verde
Issue date:	02/10/1986
From:	ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:
Shared Package
ML17299B045	List: ML17299B044 ML17299B047 ML17299B050
References
42AO-2ZZ50, TAC-61875, NUDOCS 8602260191
Download: ML17299B047 (25)

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R PROCEDURE PALO YERDE NUCLEAR GEi JERATlNG NO.

STATION MANUAL 42AO-2ZZSO REVISION VENTDfG THE CHARGIiNG PUi'IPS Page 2 of 9 REVISION. HISTORY Rev. No. Date Revised Pages Comments U dated Revision Histor P Rewrote ste s 2.2 thru 2.2.2.4 to ensure ravit flow ath available Added caution before ste 2.4.1 and rewrote 2.4.1.

Added ste s 2.14 and 2.15.

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Lg PROCEDURE PALO VERDE NUCLEAR GENERATtNG NO.

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STATlON MANUAL 42AO-2ZZ50 REVISION VENTING THE CHARGING PUiIPS Page 3 of 9 OBJECTIVE This procedure provides instructions on venting hydrogen gas from the Charging Pumps in the event they should become gas bound and cannot provide makeup flov to the RCS. The Refueling Water Tank is used to provide the head for the venting operation.

TABLE OF CONTENTS SECTION PAGE NmIBER e

1.0 VERIFICATION OF CHARGING PUHP GAS BINDING 2.0 VENTING OPERATIONS APPENDICES Appendix A - References PV218 00D REV. 8/82 (i85P)

'.." : FG&IMFORMATION NLY PROCEOURE PALO VERDE NUCLEAR GENERATING NO.

STATION MANUAL 42AO-2ZZ50 s>

REVISION VENTING THE CHARGING PUHPS Page 4 of 9 1.0 VERIFICATION OF CHARGING PUNP GAS BINDING Charging Pumps are incapable of pumping even when the valve lineup has been determined to be correct.

1.2 The level in the Volume Control Tank is suspected of having dropped to near OX prior to the Charging Pumps becoming gas bound.

1.3 Possible level deviation between the VCT level transmitters CH-LT-226 and CH-LT-227.

2.0 VENTING OPERATIONS e

2.1 Place all Charging Pumps in the pull-to-lock position with their handswitches on B03.

2.2 Provide a gravity flow path from the RMT to the Charging Pump Suctions as follows:

2.2.1 If VCT outlet valve CH-UV-501 can be verified closed, open CH-HV-536 on B03.

OR 2.2.2 If VCT outlet valve CH-UV-501 cannot be verified closed perform the following line up.

2.2.2.1 In Charging Pump room gl, close suction valve CH-V316 and open suction cross-tie valve CH-V755.

2.2.2.2 In Charging Pump room jr2, close suction valve CH-V319 'and open suction cross-tie valve CH-V756.

2.2.2.3 In Charging Pump room g3, close suction vlave CH"V322 and open suction crosstie valve CH-V757.

2.2.2.4 In the East Penetration room, open the Safety Injection header isolation to Charging Pump suction, valve CH-V327.

PV218 000 AEV, 8/b2 (485P)

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FGNFGRMATIGNNLY PROCEDURE PALO VERDE NUCLEAR GENERATING NO.

STATION MANUAL 42AO-2ZZ50 RF VISION VENTING THE CHARGING PUMPS Page 7 of 9 2.8.7 If venting of the charging pumps is complete, then proceed to

~ step 2. 11.

2.9 To vent CHB-P01, perform the following:

2.9.1 Close/Check Closed valves CH-V320, CH-V332 and CH-VY74.

2.9.2 Open CH-V067.

2.9.3 Begin venting operations by opening CH-VY73. Verify flow on flow gage CH-FG-998.

2.9.4 When venting is complete close CH-VY73 and CH-V067.

2.9.5 Ensure all gases are vented from the pump by opening discharge drain isolation valve CH-V332. Check for flow on flow gage CH-FG-1002.

2.9.6 When venting is complete, close valve CH-V332.

2.9.7 If venting of the charging pumps is complete, then proceed to step 2.11.

2.10 To vent CHE-P01, perform the following:

2.10.1 Close/Check Closed valves CH-V323, CH-V336 and CH-VY72.

2.10.2 Open CH-V065.

2.10.3 Begin venting operations by opening CH-VY71. Verify flow on flow gage CH-FG-997.

2.10.4 When venting is complete close CH-VY71 and CH-V065.

F 10.5 Ensure all gases are vented from the pump by opening discharge drain isolation valve CH-V336. Check for flow on flow gage CH-FG-1001.

2.10.6 When venting is complete, close valve CH-V336.

2.10.7 If venting of the charging pumps is complete, then proceed to step 2..11.

2.11 Open valve CH-VY77.

FQIR IIIMFGIRMATIIQNGIMLY

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I FGI INFQRMATIQNNLY PROCEDURE PALO VERDE NUCLEAR GENERATING NO. APPENDIX A STATION MANUAL 42AO-2ZZ50 Page 1 of 1 F

4 REVISION

~ y VENTING THE CHARGING PUMPS Page 9 of 9 REFERENCES 1 ~ 0 Implementing 420P-2CH01, CVCS Normal Operations 2.0 Developmental 2.1 NUREG 0857 Supplement 9, Dec. 1985.

2.2 DCP 20N-CH-226.

2.3 P & ID's:

02-M-CHP-002, Rev 4- DCN's 15, 24, 30, 113, 121, 124 02-M-CHP-003, Rev 3- DCN's 19, 20, 33, 36, 42, 46, 124, 129, 130, 134, 136, 146, 148, 149.

Attachment 3 0 erations Procedure for Ventin of the Char in Pum s (42AO-2ZZ50 Revision 2)

PROCEDURE PALO VERDE NUCLEAR GENERATING NO.

STATION MANUAL A2AO-2ZZ50 REVISION VENTIANG THE CHARGING PUMPS Page 1 of 9 DEPT. HEAD DATE '2- r d PRB/PRG/TRRG REVIEW DATE APPROVED BY DATE. > >(

'FFECTIVE DATE ~ </PG >Pi'~omsosec sho22~

DN-5526C/0765C pgR ADOCK 05000529 P PDR PV21840D RFV. 8/52 (985P)

PALO VERDE NUCLEAR GENERATING PROCEDURE NO.

STATION MANUAL 42AO-2ZZ50 REVISION VENTING THE CHARGING PUMPS Page 2 of 9 REVISION HISTORY Rev. No. Date Revised Pages Comments 2-13-86 U dated Revision Histor P '.

Rewrote ste s 2.2 thru 2.2.2.4 to ensure ravit flow ath available Added caution before sten 2.4.1 and rewrote 2.4.1.

Added steos 2.14 and 2.15.

Added ste 2.7.1 and deleted note Added note and added ste 2.12 PV215400 REV. 8/82 (985P)

PROCEDURE PALO VERDE NUCLEAR GENERATING NO.

STATION MANUAL .42AO-2ZZ50 REVISION VENTING THE CHARGING PUMPS Page 3 of 9 OB JECTIVE This procedure provides instructions on venting hydrogen gas from the Charging Pumps in the event they should become gas bound and cannot provide makeup flow to the RCS. The Refueling Vater Tank is used to provide the head for the venting operation.

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TABLE OF CONTENTS SECTION PAGE NUMBER

, 1.0 VERIFICATION OF CHARGING PUMP GAS BINDING 2.0 VENTING OPERATIONS APPENDICES 1~

Appendix A - Rererences 9

PROCEDURE PALO YERDE NUGLEAR GENERATING NO.

STATION MANUAL ,42AO-2ZZ50 REVISION VENTING THE CHARGING PUMPS Page 4 of 9 1.0 VERIFICATION OF CHARGING PUMP GAS BINDING Charging Pumps are incapable of pumping even when the valve lineup has been determined to be correct.

1.2 The level in the Volume Control Tank is suspected of having dropped to near OX prior to the Charging Pumps becoming gas bound:

1.3 Possible level deviation between the VCT level transmitters CH-LT-226 and CH-LT-227.

2.0 VENTING OPERATIONS 2.1 Place all Charging Pumps in the pull-to-lock position with their handswitches on B03.

2.2 Provide a gravity flow path from the RVT to the Charging Pump Suctions as follows:

2.2.1 If VCT outlet valve CH-UV-501 can be verified closed, open CH-HV-536 on B03.

OR 2.2.2 If VCT outlet valve CH-UV-501 cannot be verified closed perform the following line up.

2.2.2.1 In Charging Pump room P/'1, close suction valve CH-V316 and open suction cross-tie valve CH-V755.

2.2.2.2 In Charging Pump room /<2, close suction va'lve CH-V319 and open suction cross-tie valve CH-V756.

2.2.2.3 In Charging Pump room,",3, close suction vlave CH-V322 and open suction crosstie valve CH-V757.

2.2.2.4 In the East Penetration room, open the Safety Injection header isolation to Charging Pump suction, valve CH-V327..

PV21840D REV. 8/N (98SP)

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PROCEDURE PALO VERDE NUCLEAR GENERATING NO.

STAT(ON MANUAL .42AO-2ZZ50 REVISION VENTING THE CHARGING PUHPS Page 6 of 9 2.7 Establish communications between the Control Room, the Nuclear Operator at the Charging Pumps and the Nuclear Operator at the vent receiving tank.

2.7.1 During the venting operation, the Nuclear Operator at the vent receiver tank should try to maintain the level in the tank at approximately 50%. This is accomplished by throttling open the vent receiver tank drain valve, CH-VY-80, and throttling closed the vent receiver tank inlet valve, CH-VY-78, as necessary.

If the level in the vent receiver tank should increase above 75<o', the Operator at the tank should stop the venting process by closing inlet valve, CH-VY-78, and then informing the Operator at the Charging Pumps that venting has been momentarily stopped. When the tank level has been lowered .

sufficiently, venting should be resumed by reopening inlet valve, CH-VY-78, and informing the Operator at the Charging Pumps.

NOTE Perform step 2.8 if CHA-P01 is the pump to 'be vented. If CHB-P01 is to be vented, then proceed to step 2.9. If CHE-P01 is to be vented, then proceed to step 2.10.

Venting of the charging pumps will be complete when the local flow gages indicate solid flow and level in the vent receiving tank increases.

2.8, To vent CHA-P01, perform the following:

2.8.1 Close/check closed valves CH-V317., CH-V329 and CH-VY76.

2.8.2 Open CH-V069.

2.8.3 venting operations by opening CH-VY75. I'egin Veri:fy flow on flow gage CH-FG-999.

2.8.4 When venting is complete close CH-VY75 and CH-V069.

2.8.5 Ensure all gases are vented from the pump by opening discharge drain isolation valve CH-V329. Check for flow on =-

flow gage CH-FG-1003.

PROCEDURE PALO VERDE NUCLEAR GENERATING NO.

STATION MANUAL 42AO-2ZZ50 REVISlON VENTING THE CHARGING PU.'lPS Page 7 of 9 2.8.6 When venting is complete, close valve CH-V329.

2.8.7 If venting of the charging pumps is complete, then proceed to step F 11.

2.9 To vent, CHB>>P01, perform the following:

2.9.1 Close/Check Closed valves CH-V320, CH-V332 and CH-VY74.

2.9.2 Open CH-V067.

2.9.3 Begin venting operations by opening CH-VY73. Verify flow on flow gage CH-FG-998.

2.9.4 When venting is complete close CH-VY73 and CH-V067.

2.9.5 Ensure all gases are vented" from the pump by opening discharge drain isolat,ion valve CH-V332. Check for flow on flow gage CH-FG-1002.

When venting is complete, close valve CH-V332.

'.9.6 2:9.7 If venting of the charging pumps is complete, then proceed to step 2.11.

2.10 To vent CHE-P01, perform the following 2.10.1 ClosejCheck Closed valves CH-V323, CH-V336 and CH-VY72.

2.10.2 Open CH-V065.

2.10.3 Begin venting operations by opening CH-VY71. Verify flow on flow gage CH-FG-997.

2.10.4 When venting is complete close CH-VY71 and CH-V065. ~

2.10.5 Ensure all gases are vented from the pump by opening discharge drain isolat,ion valve CH-V336. Check for flow on flow gage CH-FG-1001.

2.10.6 When 'venting is complete, close valve CH-V336.

2.10.7 If venting of the charging pumps is complete, then proceed-to 2.11. .'tep 2.11 Open valve CH-VY77.

PROCEOURE PALO VERDE NUCLEAR GENERATING NO.

STATION MANUAL 42AO-2ZZ50 REVISION VENTING THE CHARGING PUMPS Page 8 of 9 2.12 When the vent receiver tank is near empty, close CH-VY-80.

NOTE Flow irregularities on CH-FI-212 may be caused by gas accumulating in the instrument lines.

Inform ISC of the hazards involved, and have them vent the flow transmitter as required.

2.13 Close valve CH-VY78.

2.14 Start Charging Pumps as directed by the Shift Supervisor using 420P-2CH01, CVCS Normal Operations, and verify flow on flow indicator CH-FI-212 on B03.

2.15 Stop the Aux Bldg Ess. AFU started in step 2.3.

HFA-J01/M05/M06 OR HFB-J01/M05/M06 2.16 When conditions have stabilized, restore CVCS system to normal operating conditions at the discretion of the Shift Supervisor, per 420P-2CH01, CVCS Normal Operations.

PV218400 REV. 8/82 (985P) j

PROCEDURE PALO VERDE NUCLEAR GENERATING NO. APPENDIX A STATION MANUAL .42AO-2ZZ50 Page 1 of 1 REVISION VENTING THE CHARGING PU.'iPS 2 Page 9 of 9 REFERENCES 1.0 Implementing I

1.1 420P-2CH01, CVCS Normal Operations 2.0 Developmental 2.1 NUREG 0857 Supplement 9, Dec. 1985.

2.2 DCP 20N-CH"226.

2.3 P & ID's:

02-M-CHP-002, Rev 4 - DCN's 15, 24, 30, 113, 121, 124 02-M-CHP-003, Rev 3 DCN's 19, 20, 33,"36, 42, 46, 124, 129, 130, 134, 136, 146, 148, 149.

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'V216400 AEV, 8/82 (985P)

Attachment 4 Sim lified Dia ram of Char in Pum Vent 'Pi in

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