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| {{#Wiki_filter:ATTACHMENT11.4'I'iable-erabilit1JHAsystem,subsystem,train,component'rdeviceshallbeoperableorhaveoperabilitywhenitiscapableofperformingitsspecifiedfunction(s).Implicitinthisdefinitionshallbetheassumptionthatallnecessaryattendantinstrumentation,controls,normaloremergencyelectricalpowersources(subjecttolSection3.0.2),coolingorsealwater;lubrication,supports,orotherauxiliaryequipmentthatarerequiredforthesystem,subsystem,train,componentordevicetoperformitsfunction(s)arealsocapableofperformingtheirrelatedsupportfunction(s).Amendment4g1-laPROPOSED88070500i888062iPDRADQCN,05000240PPDR | | {{#Wiki_filter:ATTACHMENT 1 1.4 erabilit 1J |
| ~4 ATTACHMENT21.ClarificationoftheJuly24,1987responsetoNRCStaffestion54reardinSGsnubbers.TheSGsnubbersarenotrequiredtobefunctionallytested,sincesnubberlockupisnotacrediblefailuremode.However,extensivemaintenanceisperformedonthesesnubbersinordertocomplywiththe"snubbersealservicelifemonitoring"TechnicalSpecification4.14.1.f.ThatmaintenanceisdescribedinProcedureM-40.7,whichprovidesinstructionsforremoval,inspection,maintenance,test,andreinstallationofAnker-Holthsnubbersonthesteamgenerators.Theseactivitiesincludedisassembly,cleaning,replacement.ofallsealsandreplacementofhydraulicfluid.Followingtherebuildingofthesnubber,ahydrostatictestisperformedoneachsnubbertoverifypressureintegrityandsealinstallation.Theseactivitiesareperformedatamaximumofa10yearintervalsoastoensuresnubbersealservicelifeisnotexceeded..TheresultsofthismaintenancearerecordedintheplantrecordsinaccordancewithproposedTechnicalSpecification6.10.2.m.All16steamgeneratorsnubbershavebeen.rebuilttwiceeachsinceplantstartup.2.ResonsetoNRCStaffestiononMechanicalSnubbersTheStandardTechnicalSpecificationsstatethatmechanicalsnubberfunctionaltestacceptancecriteriainclude:"Dragforceshallnothaveincreasedmorethan50%sincethelastfunctionaltest."Inlieuofthis,RG&EprovidesthefollowingmeansofmonitoringsnubberdragforcesintheGinnaStationSnubberInspectionandTestProgram.Theprogramrequiresfunctionaltestresultstobereviewedtodetermineacceptabilityofresults.Ifdragforce.isnotgreaterthan1%ofsnubbernormaldesignload,thesnubbermaybeinstalledinanylocation.Ifsnubberdragforceisbetween1-oand5%,thesnubberacceptabilityisbasedonatablecorrelatingsnubbersizewithpipesize.Overa5%dragisconsideredunacceptable.However,anysnubberwithadragforcegreaterthan2%isconsidereddegradedandisrequiredtoberepairedorr'eplacedasapreventivemaintenancemeasure.Thus,RG&Econsidersthattheidentificationofpotentialdegradationrelativetorequiredsnubberfunctionisconservativelyevaluatedandmonitoredinourpresentprogram. | | 'I'iable-H A system, subsystem, train, component'r device shall be operable or have operability when it is capable of performing its specified function(s). Implicit in this definition shall be the assumption that all necessary attendant instrumentation, controls, normal or emergency electrical power sources (subject to l |
| j~1 | | Section 3.0.2), cooling or seal water; lubrication, supports, or other auxiliary equipment that are required for the system, subsystem, train, component or device to perform its function(s) are also capable of performing their related support function(s). |
| }} | | Amendment 4g 1-la PROPOSED 88070500i8 88062i PDR ADQCN, 05000240 P PDR |
| | |
| | ~ 4 ATTACHMENT 2 |
| | : 1. Clarification of the July 24, 1987 response to NRC Staff estion 54 re ardin SG snubbers. |
| | The SG snubbers are not required to be functionally tested, since snubber lockup is not a credible failure mode. However, extensive maintenance is performed on these snubbers in order to comply with the "snubber seal service life monitoring" Technical Specification 4.14.1.f. |
| | That maintenance is described in Procedure M-40.7, which provides instructions for removal, inspection, maintenance, test, and reinstallation of Anker-Holth snubbers on the steam generators. These activities include disassembly, cleaning, replacement . of all seals and replacement of hydraulic fluid. Following the rebuilding of the snubber, a hydrostatic test is performed on each snubber to verify pressure integrity and seal installation. These activities are performed at a maximum of a 10 year interval so as to ensure snubber seal service life is not exceeded.. The results of this maintenance are recorded in the plant records in accordance with proposed Technical Specification 6.10.2.m. All 16 steam generator snubbers have been .rebuilt twice each since plant startup. |
| | : 2. Res onse to NRC Staff estion on Mechanical Snubbers The Standard Technical Specifications state that mechanical snubber functional test acceptance criteria include: "Drag force shall not have increased more than 50% since the last functional test." In lieu of this, RG&E provides the following means of monitoring snubber drag forces in the Ginna Station Snubber Inspection and Test Program. The program requires functional test results to be reviewed to determine acceptability of results. If drag force. is not greater than 1% of snubber normal design load, the snubber may be installed in any location. If snubber drag force is between 1-o and 5%, the snubber acceptability is based on a table correlating snubber size with pipe size. Over a 5% drag is considered unacceptable. However, any snubber with a drag force greater than 2% is considered degraded and is required to be repaired or r'eplaced as a preventive maintenance measure. Thus, RG&E considers that the identification of potential degradation relative to required snubber function is conservatively evaluated and monitored in our present program. |
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[Table view]
Category:TECHNICAL SPECIFICATIONS & TEST REPORTS
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ML17265A3721998-07-16016 July 1998
Rev 14 to EOP AP-CW.1, Loss of Circ Water Pump. W/980716 Ltr
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Rev 12 to AP-RCS.1, Reactor Coolant Leak.
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Rev 14 to AP-ELEC.1, Loss of 12A & 12B Busses.
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ML17264A9391997-07-0707 July 1997
Rev 3 to Technical Requirements Manual for Ginna Station, Inserting New Tabs Accordingly Per Previous Transmittal for Rev
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[Table view] |
Text
ATTACHMENT 1 1.4 erabilit 1J
'I'iable-H A system, subsystem, train, component'r device shall be operable or have operability when it is capable of performing its specified function(s). Implicit in this definition shall be the assumption that all necessary attendant instrumentation, controls, normal or emergency electrical power sources (subject to l
Section 3.0.2), cooling or seal water; lubrication, supports, or other auxiliary equipment that are required for the system, subsystem, train, component or device to perform its function(s) are also capable of performing their related support function(s).
Amendment 4g 1-la PROPOSED 88070500i8 88062i PDR ADQCN, 05000240 P PDR
~ 4 ATTACHMENT 2
- 1. Clarification of the July 24, 1987 response to NRC Staff estion 54 re ardin SG snubbers.
The SG snubbers are not required to be functionally tested, since snubber lockup is not a credible failure mode. However, extensive maintenance is performed on these snubbers in order to comply with the "snubber seal service life monitoring" Technical Specification 4.14.1.f.
That maintenance is described in Procedure M-40.7, which provides instructions for removal, inspection, maintenance, test, and reinstallation of Anker-Holth snubbers on the steam generators. These activities include disassembly, cleaning, replacement . of all seals and replacement of hydraulic fluid. Following the rebuilding of the snubber, a hydrostatic test is performed on each snubber to verify pressure integrity and seal installation. These activities are performed at a maximum of a 10 year interval so as to ensure snubber seal service life is not exceeded.. The results of this maintenance are recorded in the plant records in accordance with proposed Technical Specification 6.10.2.m. All 16 steam generator snubbers have been .rebuilt twice each since plant startup.
- 2. Res onse to NRC Staff estion on Mechanical Snubbers The Standard Technical Specifications state that mechanical snubber functional test acceptance criteria include: "Drag force shall not have increased more than 50% since the last functional test." In lieu of this, RG&E provides the following means of monitoring snubber drag forces in the Ginna Station Snubber Inspection and Test Program. The program requires functional test results to be reviewed to determine acceptability of results. If drag force. is not greater than 1% of snubber normal design load, the snubber may be installed in any location. If snubber drag force is between 1-o and 5%, the snubber acceptability is based on a table correlating snubber size with pipe size. Over a 5% drag is considered unacceptable. However, any snubber with a drag force greater than 2% is considered degraded and is required to be repaired or r'eplaced as a preventive maintenance measure. Thus, RG&E considers that the identification of potential degradation relative to required snubber function is conservatively evaluated and monitored in our present program.
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