Information Notice 1994-29, Charging Pump Trip During a Loss-of-Coolant Event Caused by Low Suction Pressure: Difference between revisions

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==Description of Circumstances==
==Description of Circumstances==
During a steam generator tube rupture event at Palo Verde Unit 2 on March 14,1993 (NRC Inspection Report 50-279/93-14), a charging pump tripped off on lowsuction pressure when the operators switched the charging pump suction sourcefrom the volume control tank to the refueling water tank. During thesubsequent evaluation of the event, the licensee determined that four pumps,three charging pumps and a boric acid makeup pump, were all taking suctionthrough the same 7.6-cm [3-in.] diameter pipe. The licensee also determinedthat the high rate of flow through the suction pipe that resulted from thesimultaneous operation of all four pumps caused a sufficient pressurereduction at the suction of the pumps to lower this pressure below the lowsuction trip setpoints of the charging pumps.Two charging pumps were already running when the tube rupture occurred. Inaddition, the operators were running a boric acid pump to circulate therefueling water through filters to purify it for an upcoming outage; Theboric acid pump flow was being recirculated back to the refueling water tankand did not contribute to the makeup water going into the reactor coolantsystem. The operators started the third charging pump early in the event inan effort to restore the pressurizer level, which was decreasing because ofthe tube rupture. At that time all of the charging pumps were taking suctionfrom the volume control tank, which is the normal source of makeup water forthe reactor coolant system. Approximately 30 minutes later, in accordancewith emergency procedures, the operators opened the suction valve from the9404060036 po-rXE qq-D29 qqoqIn TkId9L III IN 94-29-V April 11, 1994 refueling water tank and then closed the suction valve from the volume controltank.At this point one of the charging pumps tripped off. The operators were ableto restore the tripped charging pump to operation by realigning the suction ofthe charging pumps to other suction paths from the refueling water tank.DiscussionFollowing this event the licensee calculated that, with the boric acid pumprunning, the remaining flow capacity of the refueling water tank suctionsource that was in use was Just sufficient for two charging pumps. With allfour pumps running the suction pressure was below the low suction trip setpoints (81.0 kPa to 87.2 kPa [11.75 psia to 12.65 psia]) for the chargingpumps. Because the trip set points are set at slightly different pressures,only one pump tripped. Once this first pump tripped, the resulting rise insuction pressure allowed the remaining pumps to keep running.The licensee concluded that, if recirculation by the boric acid pump is not inprogress, sufficient suction pressure exists for all three charging-pumps.Consequently, the licensee revised the emergency procedures that involve thecharging pumps to specify that any ongoing recirculation of the refuelingwater by the boric acid pump is to be terminated when refueling water isneeded for emergency makeup.Licensees of pressurized-water reactors use the charging systems in a numberof ways for accident mitigation, such as including the charging system as apart of the automatic safety injection system. Charging systems are also usedas a source of pressurizer spray to depressurize the reactor when the reactorcoolant pumps are shut down. Emergency operating procedures often refer tothe charging systems for other uses as well.Some licensees do not isolate the volume control tank (or its equivalent) whenthe charging system source is switched to the refueling water tank (or itsequivalent), but depend on the static pressure in the refueling water tank tokeep the volume control tank from draining. Should the volume control tankempty in response to lower-than-expected suction pressure, hydrogen cover gasnormally contained in this tank could enter the charging system suction andcause the pumps to malfunctio IN 94-29April 11, 1994 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.Brian K. Gr es, Director ter-Division of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact: Warren C. Lyon, NRR(301) 504-3892
During a steam generator tube rupture event at Palo Verde Unit 2 on March 14,1993 (NRC Inspection Report 50-279/93-14), a charging pump tripped off on lowsuction pressure when the operators switched the charging pump suction sourcefrom the volume control tank to the refueling water tank. During thesubsequent evaluation of the event, the licensee determined that four pumps,three charging pumps and a boric acid makeup pump, were all taking suctionthrough the same 7.6-cm [3-in.] diameter pipe. The licensee also determinedthat the high rate of flow through the suction pipe that resulted from thesimultaneous operation of all four pumps caused a sufficient pressurereduction at the suction of the pumps to lower this pressure below the lowsuction trip setpoints of the charging pumps.Two charging pumps were already running when the tube rupture occurred. Inaddition, the operators were running a boric acid pump to circulate therefueling water through filters to purify it for an upcoming outage; Theboric acid pump flow was being recirculated back to the refueling water tankand did not contribute to the makeup water going into the reactor coolantsystem. The operators started the third charging pump early in the event inan effort to restore the pressurizer level, which was decreasing because ofthe tube rupture. At that time all of the charging pumps were taking suctionfrom the volume control tank, which is the normal source of makeup water forthe reactor coolant system. Approximately 30 minutes later, in accordancewith emergency procedures, the operators opened the suction valve from the9404060036 po-rXE qq-D29 qqoqIn TkId9L III


===Attachment:===
IN 94-29-V April 11, 1994 refueling water tank and then closed the suction valve from the volume controltank.At this point one of the charging pumps tripped off. The operators were ableto restore the tripped charging pump to operation by realigning the suction ofthe charging pumps to other suction paths from the refueling water tank.DiscussionFollowing this event the licensee calculated that, with the boric acid pumprunning, the remaining flow capacity of the refueling water tank suctionsource that was in use was Just sufficient for two charging pumps. With allfour pumps running the suction pressure was below the low suction trip setpoints (81.0 kPa to 87.2 kPa [11.75 psia to 12.65 psia]) for the chargingpumps. Because the trip set points are set at slightly different pressures,only one pump tripped. Once this first pump tripped, the resulting rise insuction pressure allowed the remaining pumps to keep running.The licensee concluded that, if recirculation by the boric acid pump is not inprogress, sufficient suction pressure exists for all three charging-pumps.Consequently, the licensee revised the emergency procedures that involve thecharging pumps to specify that any ongoing recirculation of the refuelingwater by the boric acid pump is to be terminated when refueling water isneeded for emergency makeup.Licensees of pressurized-water reactors use the charging systems in a numberof ways for accident mitigation, such as including the charging system as apart of the automatic safety injection system. Charging systems are also usedas a source of pressurizer spray to depressurize the reactor when the reactorcoolant pumps are shut down. Emergency operating procedures often refer tothe charging systems for other uses as well.Some licensees do not isolate the volume control tank (or its equivalent) whenthe charging system source is switched to the refueling water tank (or itsequivalent), but depend on the static pressure in the refueling water tank tokeep the volume control tank from draining. Should the volume control tankempty in response to lower-than-expected suction pressure, hydrogen cover gasnormally contained in this tank could enter the charging system suction andcause the pumps to malfunction.
List of Recently Issued NRC Information Notices Ak-1achmentIN 94-29April 12, 1994 LIST OF RECENTLY ISSUEDNRC INFORMATION NOTICESInformation Date ofNotice No. Subject Issuance Issued to92-51,Supp. 194-2894-2794-26Misapplication andInadequate Testing ofMolded-Case CircuitBreakersPotential Problems withFire-Barrier PenetrationSealsFacility OperatingConcerns Resulting fromLocal Area FloodingPersonnel Hazards andOther Problems fromSmoldering Fire-Retard-ant Material in theDrywell of a Boiling-Water ReactorSafety Systems Responseto Loss of Coolant andLoss of Offsite PowerFailure of ContainmentSpray Header Valve toOpen due to ExcessivePressure from InertialEffects of WaterInadequate Maintenanceof Uninterruptible PowerSupplies and InvertersGuidance to Hazardous,Radioactive and MixedWaste Generators on theElements of a WasteMinimization Program04/12/9404/05/9403/31/9403/28/9403/25/9403/25/9403/24/9403/25/94All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All NRC Licensees.93-17,Rev. 194-2594-2494-23OL -Operating LicenseCP -Construction Permit


.I IfIN 94-29April 11, 1994 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.orig /s/'d by CIGrimesBrian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact: Warren C. Lyon, NRR(301) 504-3892
IN 94-29April 11, 1994 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.Brian K. Gr es, Director ter-Division of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact: Warren C. Lyon, NRR(301) 504-3892Attachment:List of Recently Issued NRC Information Notices


===Attachment:===
Ak-1achmentIN 94-29April 12, 1994 LIST OF RECENTLY ISSUEDNRC INFORMATION NOTICESInformation Date ofNotice No. Subject Issuance Issued to92-51,Supp. 194-2894-2794-26Misapplication andInadequate Testing ofMolded-Case CircuitBreakersPotential Problems withFire-Barrier PenetrationSealsFacility OperatingConcerns Resulting fromLocal Area FloodingPersonnel Hazards andOther Problems fromSmoldering Fire-Retard-ant Material in theDrywell of a Boiling-Water ReactorSafety Systems Responseto Loss of Coolant andLoss of Offsite PowerFailure of ContainmentSpray Header Valve toOpen due to ExcessivePressure from InertialEffects of WaterInadequate Maintenanceof Uninterruptible PowerSupplies and InvertersGuidance to Hazardous,Radioactive and MixedWaste Generators on theElements of a WasteMinimization Program04/12/9404/05/9403/31/9403/28/9403/25/9403/25/9403/24/9403/25/94All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All NRC Licensees.93-17,Rev. 194-2594-2494-23OL -Operating LicenseCP -Construction Permit
List of Recently Issued NRC Information Notices*SEE PREVIOUS CONCURRENCEOFFICE *OGCB *TECH ED *SRXB/DSSA *C:SRXB/DSSANAME DCKirkpatrick RSanders WCLyon RJonesDATE 111/30/93 111/30/93 , 12/20/93 12/22/93*D:DSSA*C:OGCB/DORSD:DORS/NRRAThadani GHMarcus BKGrimes601/04/94 01/11/94 04/L /94VULUMMN NAME: 4-M. IN IN 94-xxMarch xx, 1994 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact:Warren C. Lyon, NRR(301) 504-3892*SFF PREVOUS CONCURRENCEOFFICE *OGCB *TECH ED *SRXB/DSSA *C:SRXB/DSSANAME DCKirkpatrick RSanders WCLyon RJonesDATE 11/30/93 11/30/93 12/20/93 1 12/22/93.-- .1*D: DSSA*C:OGCB/DORSD:DORS/NRRAThadani GHMarcus BKGrimes01/04/94 01/11/94 03/ /94I=01twDOCUMENT NAME: CHARGING.DCK IN 94-xxJanuary xx, 1994 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor Regulation
 
.I IfIN 94-29April 11, 1994 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.orig /s/'d by CIGrimesBrian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact: Warren C. Lyon, NRR(301) 504-3892Attachment:List of Recently Issued NRC Information Notices*SEE PREVIOUS CONCURRENCEOFFICE *OGCB *TECH ED *SRXB/DSSA *C:SRXB/DSSANAME DCKirkpatrick RSanders WCLyon RJonesDATE 111/30/93 111/30/93 , 12/20/93 12/22/93*D:DSSA*C:OGCB/DORSD:DORS/NRRAThadani GHMarcus BKGrimes601/04/94 01/11/94 04/L /94VULUMMN NAME: 4-M. IN
 
IN 94-xxMarch xx, 1994 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact:Warren C. Lyon, NRR(301) 504-3892*SFF PREVOUS CONCURRENCEOFFICE *OGCB *TECH ED *SRXB/DSSA *C:SRXB/DSSANAME DCKirkpatrick RSanders WCLyon RJonesDATE 11/30/93 11/30/93 12/20/93 1 12/22/93.-- .1*D: DSSA*C:OGCB/DORSD:DORS/NRRAThadani GHMarcus BKGrimes01/04/94 01/11/94 03/ /94I=01twDOCUMENT NAME: CHARGING.DCK
 
IN 94-xxJanuary xx, 1994 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor Regulation


===Technical Contact:===
===Technical Contact:===
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===Technical Contact:===
===Technical Contact:===
Warren C. Lyon, NRR(301) 504-3892t OFFICE OGCB TECH ED SRXBA 54 l C:OGCB/DORS D:DORS/NRRNAME fDCKirkpatrick RPoUlm'us WCLyon GHMarcus BKGrimesDATE /(1g9/93PZ-@ Iit/3093 j/93 / /93 / /93 1DOCUMENT NAME: CHARGING .CK l"05-- 1}}
Warren C. Lyon, NRR(301) 504-3892t OFFICE OGCB TECH ED SRXBA 54 l C:OGCB/DORS D:DORS/NRRNAME fDCKirkpatrick RPoUlm'us WCLyon GHMarcus BKGrimesDATE /(1g9/93PZ-@ Iit/3093 j/93 / /93 / /93 1DOCUMENT NAME: CHARGING .CK l"05-- 1  
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Revision as of 19:23, 6 April 2018

Charging Pump Trip During a Loss-of-Coolant Event Caused by Low Suction Pressure
ML031060474
Person / Time
Site: Beaver Valley, Millstone, Hatch, Monticello, Calvert Cliffs, Dresden, Davis Besse, Peach Bottom, Browns Ferry, Salem, Oconee, Mcguire, Nine Mile Point, Palisades, Palo Verde, Perry, Indian Point, Fermi, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Oyster Creek, Watts Bar, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Arkansas Nuclear, Three Mile Island, Braidwood, Susquehanna, Summer, Prairie Island, Columbia, Seabrook, Brunswick, Surry, Limerick, North Anna, Turkey Point, River Bend, Vermont Yankee, Crystal River, Haddam Neck, Ginna, Diablo Canyon, Callaway, Vogtle, Waterford, Duane Arnold, Farley, Robinson, Clinton, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Quad Cities, Humboldt Bay, La Crosse, Big Rock Point, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, FitzPatrick, McGuire, LaSalle, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant  Entergy icon.png
Issue date: 04/11/1994
From: Grimes B K
Office of Nuclear Reactor Regulation
To:
References
IN-94-029, NUDOCS 9404060036
Download: ML031060474 (9)
v • d • e


I.' 4 AUNITED STATESNUCLEAR REGULATORY COMMISSIONOFFICE OF NUCLEAR REACTOR REGULATIONWASHINGTON, D.C. 20555April 11, 1994NRC INFORMATION NOTICE 94-29: CHARGING PUMP TRIP DURING A LOSS-OF-COOLANTEVENT CAUSED BY LOW SUCTION PRESSURE

Addressees

All holders of operating licenses or construction permits for pressurized-water reactors.

Purpose

The U.S. Nuclear Regulatory Commission (NRC) is issuing this informationnotice to alert addressees to the possibility of a charging pump trip causedby inadequate suction pressure because too many pumps may be aligned to asingle suction path during accident mitigation. It is expected thatrecipients will review the information for applicability to their facilitiesand consider actions, as appropriate, to avoid similar problems. However,suggestions contained in this information notice are not NRC requirements;therefore, no specific action or written response is required.

Description of Circumstances

During a steam generator tube rupture event at Palo Verde Unit 2 on March 14,1993 (NRC Inspection Report 50-279/93-14), a charging pump tripped off on lowsuction pressure when the operators switched the charging pump suction sourcefrom the volume control tank to the refueling water tank. During thesubsequent evaluation of the event, the licensee determined that four pumps,three charging pumps and a boric acid makeup pump, were all taking suctionthrough the same 7.6-cm [3-in.] diameter pipe. The licensee also determinedthat the high rate of flow through the suction pipe that resulted from thesimultaneous operation of all four pumps caused a sufficient pressurereduction at the suction of the pumps to lower this pressure below the lowsuction trip setpoints of the charging pumps.Two charging pumps were already running when the tube rupture occurred. Inaddition, the operators were running a boric acid pump to circulate therefueling water through filters to purify it for an upcoming outage; Theboric acid pump flow was being recirculated back to the refueling water tankand did not contribute to the makeup water going into the reactor coolantsystem. The operators started the third charging pump early in the event inan effort to restore the pressurizer level, which was decreasing because ofthe tube rupture. At that time all of the charging pumps were taking suctionfrom the volume control tank, which is the normal source of makeup water forthe reactor coolant system. Approximately 30 minutes later, in accordancewith emergency procedures, the operators opened the suction valve from the9404060036 po-rXE qq-D29 qqoqIn TkId9L III

IN 94-29-V April 11, 1994 refueling water tank and then closed the suction valve from the volume controltank.At this point one of the charging pumps tripped off. The operators were ableto restore the tripped charging pump to operation by realigning the suction ofthe charging pumps to other suction paths from the refueling water tank.DiscussionFollowing this event the licensee calculated that, with the boric acid pumprunning, the remaining flow capacity of the refueling water tank suctionsource that was in use was Just sufficient for two charging pumps. With allfour pumps running the suction pressure was below the low suction trip setpoints (81.0 kPa to 87.2 kPa [11.75 psia to 12.65 psia]) for the chargingpumps. Because the trip set points are set at slightly different pressures,only one pump tripped. Once this first pump tripped, the resulting rise insuction pressure allowed the remaining pumps to keep running.The licensee concluded that, if recirculation by the boric acid pump is not inprogress, sufficient suction pressure exists for all three charging-pumps.Consequently, the licensee revised the emergency procedures that involve thecharging pumps to specify that any ongoing recirculation of the refuelingwater by the boric acid pump is to be terminated when refueling water isneeded for emergency makeup.Licensees of pressurized-water reactors use the charging systems in a numberof ways for accident mitigation, such as including the charging system as apart of the automatic safety injection system. Charging systems are also usedas a source of pressurizer spray to depressurize the reactor when the reactorcoolant pumps are shut down. Emergency operating procedures often refer tothe charging systems for other uses as well.Some licensees do not isolate the volume control tank (or its equivalent) whenthe charging system source is switched to the refueling water tank (or itsequivalent), but depend on the static pressure in the refueling water tank tokeep the volume control tank from draining. Should the volume control tankempty in response to lower-than-expected suction pressure, hydrogen cover gasnormally contained in this tank could enter the charging system suction andcause the pumps to malfunction.

IN 94-29April 11, 1994 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.Brian K. Gr es, Director ter-Division of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact: Warren C. Lyon, NRR(301) 504-3892Attachment:List of Recently Issued NRC Information Notices

Ak-1achmentIN 94-29April 12, 1994 LIST OF RECENTLY ISSUEDNRC INFORMATION NOTICESInformation Date ofNotice No. Subject Issuance Issued to92-51,Supp. 194-2894-2794-26Misapplication andInadequate Testing ofMolded-Case CircuitBreakersPotential Problems withFire-Barrier PenetrationSealsFacility OperatingConcerns Resulting fromLocal Area FloodingPersonnel Hazards andOther Problems fromSmoldering Fire-Retard-ant Material in theDrywell of a Boiling-Water ReactorSafety Systems Responseto Loss of Coolant andLoss of Offsite PowerFailure of ContainmentSpray Header Valve toOpen due to ExcessivePressure from InertialEffects of WaterInadequate Maintenanceof Uninterruptible PowerSupplies and InvertersGuidance to Hazardous,Radioactive and MixedWaste Generators on theElements of a WasteMinimization Program04/12/9404/05/9403/31/9403/28/9403/25/9403/25/9403/24/9403/25/94All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All NRC Licensees.93-17,Rev. 194-2594-2494-23OL -Operating LicenseCP -Construction Permit

.I IfIN 94-29April 11, 1994 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.orig /s/'d by CIGrimesBrian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact: Warren C. Lyon, NRR(301) 504-3892Attachment:List of Recently Issued NRC Information Notices*SEE PREVIOUS CONCURRENCEOFFICE *OGCB *TECH ED *SRXB/DSSA *C:SRXB/DSSANAME DCKirkpatrick RSanders WCLyon RJonesDATE 111/30/93 111/30/93 , 12/20/93 12/22/93*D:DSSA*C:OGCB/DORSD:DORS/NRRAThadani GHMarcus BKGrimes601/04/94 01/11/94 04/L /94VULUMMN NAME: 4-M. IN

IN 94-xxMarch xx, 1994 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor RegulationTechnical contact:Warren C. Lyon, NRR(301) 504-3892*SFF PREVOUS CONCURRENCEOFFICE *OGCB *TECH ED *SRXB/DSSA *C:SRXB/DSSANAME DCKirkpatrick RSanders WCLyon RJonesDATE 11/30/93 11/30/93 12/20/93 1 12/22/93.-- .1*D: DSSA*C:OGCB/DORSD:DORS/NRRAThadani GHMarcus BKGrimes01/04/94 01/11/94 03/ /94I=01twDOCUMENT NAME: CHARGING.DCK

IN 94-xxJanuary xx, 1994 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor Regulation

Technical Contact:

Warren C. Lyon,(301) 504-3892NRR*SEE PREVIOUS CONCURRENCEOFFICE *OGCB *TECH ED *SRXB/DSSA *C:SRXB/DSSANAME DCKirkpatrick I RSanders WCLyon RJonesDATE I1/30/93 J >/BY 11/30/93 112/20/93 12/22/93D:DSSA Okl C:OGCB/DORSD:DORS/NRR c llAThadani GHMarcus MYA1 BKGrimes01/04/94 01/ti/94 01/ /94DOCUMENT NAME: CHARGING.DCK

-* IIN 93-xxDecember xx, 993This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor Regulation

Technical Contact:

Warren C. Lyon, NRR(301) 504-3892Af. -.-/*SEF PREVIOUS CONCURRENCE,____1 ____ _ _____' /sOFFICE *OGCB *TECH ED ' XifDSSA SU C:SRXB/DSSAI INAME DCKirkpatrick RSanders WCLyon TC K ns RJones VDATE 11/30/93 1 11/30/93 2 /£ ./z/'?L I3L , ..aD:DSSAMC:OGCB/DORSD:DORS/NRRATha n GHMarcus I BKGrimesF 1k/ & _ /91 _ 1 /93r4DOCUMENT NAME: CHARGING.DCK3a9 IN 93-xxDecember xx, 993This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation project manager.Brian K. Grimes, DirectorDivision of Operating Reactor SupportOffice of Nuclear Reactor Regulation

Technical Contact:

Warren C. Lyon, NRR(301) 504-3892t OFFICE OGCB TECH ED SRXBA 54 l C:OGCB/DORS D:DORS/NRRNAME fDCKirkpatrick RPoUlm'us WCLyon GHMarcus BKGrimesDATE /(1g9/93PZ-@ Iit/3093 j/93 / /93 / /93 1DOCUMENT NAME: CHARGING .CK l"05-- 1


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