ML17037C433: Difference between revisions

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| number = ML17037C433
| number = ML17037C433
| issue date = 08/08/1977
| issue date = 08/08/1977
| title = Nine Mile Point, Unit 1 - Letter Regarding Surveillance Requirements and Limiting Conditions for Operations and Requesting an Application for Amendment to the Operating License That Will Change the Technical Specifications
| title = Letter Regarding Surveillance Requirements and Limiting Conditions for Operations and Requesting an Application for Amendment to the Operating License That Will Change the Technical Specifications
| author name = Lear G
| author name = Lear G
| author affiliation = NRC/NRR
| author affiliation = NRC/NRR
| addressee name = Rhode G K
| addressee name = Rhode G
| addressee affiliation = Niagara Mohawk Power Corp
| addressee affiliation = Niagara Mohawk Power Corp
| docket = 05000220
| docket = 05000220
Line 12: Line 12:
| document type = Letter, Request for Additional Information (RAI), Technical Specification, Amendment
| document type = Letter, Request for Additional Information (RAI), Technical Specification, Amendment
| page count = 20
| page count = 20
| project =
| stage = Other
}}
}}


=Text=
=Text=
{{#Wiki_filter:=AUG81977DocketNo.50-220NiagaramohawkPowerCorporation ATTN:Nr.GeraldK.RhodeVicePresident
{{#Wiki_filter:=
-Engineering 300ErieBoulevard WestSyracuse, NewYork13202Gentlemen:
Distribution AUG 8  1977 Docket ORB  83 CParrish Docket No. 50-220                                                      GLear SNowicki DVerrelli Local PDR Niagara mohawk Power Corporation                                  NRC PDR ATTN:     Nr. Gerald K. Rhode                                    Attorney,    OELD Vice President - Engineering                           OI&E   (3) 300 Erie Boulevard West                                          DEisenhut Syracuse, New York 13202                                          TBAbernathy NRBuchanan Gentlemen:                                                        ACRS   (16)
RE:NINENILEPOINTNUCLEARSTATIOflUNITNO.1Distribution DocketORB83CParrishGLearSNowickiDVerrelli LocalPDRNRCPDRAttorney, OELDOI&E(3)DEisenhut TBAbernathy NRBuchanan ACRS(16)Inthepastseveralyears,asignificant numberofreliefvalvesandsafety-relief valveswerefoundtobeinoperable atBWRreactorfacili-ties.Thesevalveswereinstalled intheReactorCoolantSystemand/orAutomatic Depressurization System.Severalprogramshavebeendeveloped toreducetheincidence ofthesevalvefailures; however,additional failurescontinuetooccur.Consequently, wehaveconcluded thatchangestotheSurveillance Require-mentsandLimitingConditions forOperations forallBHR'sareneededtoprovideadditional assurance ofreliefvalveandsafety-relief valveoperabflity andreliability.
RE:    NINE NILE POINT NUCLEAR STATIOfl UNIT NO.            1 In the past several years, a significant number of relief valves and safety-relief valves were found to be inoperable at BWR reactor facili-ties. These valves were installed in the Reactor Coolant System and/or Automatic Depressurization System. Several programs have been developed to reduce the incidence of these valve failures; however, additional failures continue to occur.
Therefore, werequestthatyoumodifyyoursurveillance testingprogramthroughtheadoptionoftheprogramcontained inthemodeltechnical specifications wehaveprepared.
Consequently,     we have  concluded that changes to the Surveillance Require-ments and Limiting      Conditions  for Operations for all BHR's are needed to provide    additional  assurance   of  relief valve and safety-relief valve operabflity    and  reliability. Therefore,     we request that you modify your surveillance testing program through the adoption of the program contained in the model technical specifications we have prepared. The elements of this    program  include:
Theelementsofthisprograminclude:Eachremotlyoperatedreliefvalveandsafety-relief valvefntheReactorCoolantSystemandAutomatic Depressurizatfon Systemwillbetestedonavariablefrequency schedulerelatedtodemonstrated reliability andoperability.
Each remot    ly operated relief valve and safety-relief valve fn the Reactor Coolant System and Automatic Depressurizatfon System will be tested on a variable frequency schedule related to demonstrated reliability and operability. The testing interval is based on the number of valve failures during the required test interval. Facilities with reliable valves will progress to a longer test interval while those with valve failures will progress to a shorter test interval. This concept should result in the maintenance of a more uniform level of reliability for this equipment than previously obtained.
Thetestingintervalisbasedonthenumberofvalvefailuresduringtherequiredtestinterval.
: 2. The  increased surveillance program will become effective on Harch 1, 19T9. No increase in valve, testing is required before that date.
Facilities withreliablevalveswillprogresstoalongertestintervalwhilethosewithvalvefailureswillprogresstoashortertestinterval.
The initial testing interval. of the increased surveillance program will be based on the number of remotely operated relief valves and safety-relief valves found inoperable in the previous 18 months 1, 1977 to March 1, 1979). This lead time will permit          pP'September the resolution of the Hark I Safety-Relief Valve Loads and DFPICE~
Thisconceptshouldresultinthemaintenance ofamoreuniformlevelofreliability forthisequipment thanpreviously obtained.
SUANAMEW DATE~
2.Theincreased surveillance programwillbecomeeffective onHarch1,19T9.Noincreaseinvalve,testingisrequiredbeforethatdate.Theinitialtestinginterval.
NRC FORM'318 (9.76) NRCM 0240              4V 8 OOVEANMENT PAINTIN4 OFFICER 1024 420 624
oftheincreased surveillance programwillbebasedonthenumberofremotelyoperatedreliefvalvesandsafety-relief valvesfoundinoperable intheprevious18monthspP'September 1,1977toMarch1,1979).Thisleadtimewillpermittheresolution oftheHarkISafety-Relief ValveLoadsandDFPICE~SUANAMEWDATE~NRCFORM'318(9.76)NRCM02404V8OOVEANMENT PAINTIN4OFFICER1024420624 4Fhhr1*NI(I/'('I~fI)'''CItAIhrortSI*.~rl1lfESIih"11('",fhh"Ih(7.'''),rh,firIh,INN,h(It~Nttr r~pNiagaraHohawkPowerCorporation p,UG8197)timeissufficient topermitthedevelopment andimplementation ofimprovedsafetyandsafety-relfef valvemaintenance procedures and'othercorrective actionspriortoimplementing thetestprogram.3.Thereliefand/orsafety-relief valvelinerestraints inthetoruswillbeexaminedpriortoinitiating thetestprogramandatleastonceeachfuelcycle(f.e.,each18months)toverifycontinued structural integrity.
 
Werequestthatyousubmitwithin30daysfromyourreceiptofthis'letter,anapplication foramendment toyourlicensethatwillchangeyourtechnical specifications tobeinconformance wfththerequirements oftheenclosedmodeltechnical specifications andassociated'bases.
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Intheeventyoushoulddesirefurtherdfscussion ofthismatter,pleasecontactus.Sincerely, OriginalsignedbV
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r~       p 197) p,UG 8 Niagara Hohawk Power Corporation time  is sufficient to permit the development and implementation of improved safety and    safety-relfef valve maintenance procedures and
                  'other corrective actions prior to implementing the test program.
: 3. The relief and/or safety-relief valve line restraints in the torus will be examined prior to initiating the test program and at least once each fuel cycle (f.e., each 18 months) to verify continued structural integrity.
We request that you submit within 30 days from your receipt of this 'letter, an application for amendment to your license that will change your technical specifications to be in conformance wfth the requirements of the enclosed model    technical specifications and associated'bases.                     In the event you should desire further dfscussion of this matter, please contact us.
Sincerely, Original signed bV George Lear, Chief Operating Reactors Branch 83 Division of Operating Reactors


==Enclosure:==
==Enclosure:==


ModelTechnical Specifications GeorgeLear,ChiefOperating ReactorsBranch83DivisionofOperating ReactorsCC:ArvinE.Upton,EsquireLeBoeuf,Lamb,Lefby5NacRae1757NStreet,H.W.Washington, D.C.20036AnthonyZ.Rofsman,EsquireRofsman,KesslerandCashdan102515thStreet,N.H.5thFloorWashington, D.C.20005Nr.EugeneG.Saloga,Applicant Coordinator
Model Technical Specifications CC:
.,NineNilePointEnergyInformation CenterP.0.Box81Lycoming, Nes(York13093OFFICS~SU/NAME&DATE~ORB3CParrish8/1/77ORBk3SNowickjf8/)/77ORBii3jDV~rlI8//77,ORB83GLearRS(S77'RCFORM318(9-76)NRCM0240AU,'0,OOVSANMSNT FIIINTINO OFFICS<ISTS02~24  
Arvin E. Upton, Esquire LeBoeuf, Lamb, Lefby 5 NacRae 1757  N  Street, H. W.
<<FIF~r'F<I"I1I1<~I~k~rlrF<k<<<l<<'Ih<IIYll<<'tj'l~f'1.,Fkrl<<'.~W REACTORCOOLANTSYSTEM3/4.4.2SAFETYVALVESLIMITINGCONDITION FOROPERATION 3.4.2Atleastthefollowing reactorcoolantsystemcodesafetyvalvesandsafety-relief valvesshallbeoperablewithliftsettingswithin+1%oftheindicated pressures.
Washington, D. C.       20036 Anthony Z. Rofsman, Esquire Rofsman, Kessler and Cashdan 1025 15th Street, N. H.
(2)*Safetyvalves9(1240)psig(3)Safety-relief valves9(1100)psig(3)Safety-relief valves9(1090)psig(3)Safety-relief valves9(1080)psigAPPLICABILITY:
5th Floor Washington, D. C.       20005 Nr. Eugene    G. Saloga, Applicant Coordinator
WithAverageCoolantTemperature
            ., Nine Nile Point Energy Information Center P. 0. Box 81 Lycoming, Nes( York 13093 ORB    3          ORB  k3            ORB  ii3  j          ORB    83 OFFICS~
>212'FortheModeSwitchinRun,orStartup/Hot Standby.ACTION:Withoneormorereactorcoolantsystemcodesafetyvalve(s)orasafety-relief valve(s)inoperable eitherrestorethevalve(s)tooperablestatuswithin15minutesorbe.shutdownwithin12hoursandreduceAverageCoolantTemperature to<212'Fwithinthe next24hours..SURVEILLANCE REUIREMENTS 4.4.2.1a.Inadditiontotheapplicable ASMEBoilerandPressureVesselCode,SectionXIrequirements, eachsafety-relief valveshallbedemonstrated operable:
SU/NAME&     CParrish        SNowick    jf      DV ~rl I              GLear DATE~
Atleastonceper24hours,byverifying bellowsintegrity throughinstrument indication.
8/1 /77        8/) /77              8/   /77,             RS  (S 77
b.UntilMarch1,1979,atleastonceper18monthsby:1.Manuallyopeningeachremotelyoperated.safety-relief valvewiththereactoratorbelow5%ratedpowerandatnominaloperating
'RC FORM 318 (9-76) NRCM 0240                A U,'0, OOVSANMSNT FIIINTINO OFFICS< ISTS  02~24
: pressure, andverifying thateither:a.Theturbinebypassvalve(s)indicateacompensating valvemovement, orb.Thereactorcoolantsystempressuredecreases byanamountequivalent tothevalvepressurerelieving capacityforthetestconditions.
 
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REACTORCOOLANTSYSTEMSURVEILLANCE REUIREMENTS (Continued) 2.Conducting avisualinspection ofthesafety-relief valvelinerestraints inthetorustoverifystructural integrity forcontinued operation.
REACTOR COOLANT SYSTEM 3/4.4.2   SAFETY VALVES LIMITING CONDITION    FOR OPERATION 3.4.2    At least the following reactor coolant system code safety valves and safety-relief valves shall indicated pressures.
c.AfterMarch1,1979,byperformance ofthefollowing testprogram:1.Manuallyopeningeachremotelyoperatedsafety-relief valveinaccordance withthetestscheduleofTable4.4-10withthereactoratorbelow5Xratedpowerandasteamatnominaloperating pressureandverifying thateither:a.Theturbinebypassvalve(s)indicateacompensating valvemovement, orb.Thereactorcoolantsystempressuredecreases byanamountequivalent tothevalvepressurerelieving capacityforthetestconditions.
be operable with  lift settings within + 1% of the (2)* Safety valves 9 (1240) psig (3)  Safety-relief valves 9 ( 1100) psig (3 ) Safety-relief valves 9 ( 1090) psig (3) Safety-relief valves 9 (1080) psig APPLICABILITY: With Average Coolant Temperature > 212'F          or the Mode Switch in Run, or Startup/Hot Standby.
2.TheinitialNextRequiredTestIntervalofTable4.4-10shallbedetermined bythenumberofremotelyoperatedreliefandsafety-relief valvesfoundinoperable fromSeptember 1,1977toMarch1,1979.3.TheinitialvalvetestsofTable4.4-10shallbecompleted by,theearlierof:a.Thecompletion ofthenextrefueling outageoccurring afterMarch1,1979,orb.ThetimeperioddefinedbyMarch1,1979plustheinitialtestinterval, determined above.4.Atleastonceper18months,byconducting avisualinspection ofthesafety-relief valvelinerestraints inthetorustoverifystructural integrity forcontinued operation.
ACTION:
4.4.2.2Eachsafetyvalveandthesafetyvalvefunctionofeachsafety-reliefvalveshallbedemonstrated operablepertherequirements oftheASMEBoilerandPressureVesselCode()EditionandAddendathrough().V
With one or more reactor coolant system code safety valve(s) or a safety-relief valve(s) inoperable either restore the valve(s) to operable status within 15 minutes or be. shutdown within 12 hours and reduce Average Coolant Temperature to < 212'F withinthe next 24  hours..
SURVEILLANCE RE UIREMENTS 4.4.2.1   In addition to the applicable      ASME  Boiler and Pressure  Vessel Code, Section XI requirements,     each  safety-relief valve shall be demonstrated    operable:
: a. At least once per 24 hours, by verifying bellows        integrity through instrument indication.
: b. Until  March 1, 1979,   at least once per 18 months by:
: 1. Manually opening each remotely operated .safety-relief valve with the reactor at or below 5% rated power and at nominal operating pressure,      and verifying that either:
: a. The turbine bypass valve(s) indicate      a compensating valve movement, or
: b. The reactor coolant system pressure decreases by an amount equivalent to the valve pressure relieving capacity for the test conditions.
d  d      f


TABLE4.4-10REHOTELYOPERATEDRELIEFANDSAFETY-RELIEF VALVETESTSCHEDULENUHBEROFREHOTELYOPERATEDRELIEFANDSAFETY-RELIEF VALVESFOUNDINOPERABLE DURINGTESTINGORTESTINTERVAL**
REACTOR COOLANT SYSTEM SURVEILLANCE RE UIREMENTS      (Continued)
NEXTREQUIREDTESTINTERVAL*
: 2. Conducting  a visual inspection of the safety-relief valve line  restraints  in the torus to verify structural integrity for continued operation.
012318months+25%184days+25K92days+25%31days+25%"Therequiredtestintervalshallnotbelengthened morethanonestepatatime.Earlytestsmaybeperformed priortoenteringthe"nextrequiredtestinterval" (i.e.,inadvanceofthenominaltimelessthenegative25Ktolerance band).Earlytestsmaybeusedasanewreference pointfortestsofthesameinterval, however,theyarenotacceptable forlengthening thetestinterval.
: c. After  March 1, 1979, by performance    of the following test program:
**Setpoint-driftisnotconsidered tobeavalvefailureforthepurposesofthistestschedule.
: 1. Manually opening each remotely operated safety-relief valve in accordance with the test schedule of Table 4.4-10 with the reactor at or below 5X rated power and a steam at nominal operating pressure and verifying that either:
I 3/4.4REACTORCOOLANTSYSTEMBASES3/4.4.2SAFETYVALVESThereactorcoolantsystemsafetyvalvesoperatetopreventthereactorcoolantsystemfrombeingpressurized abovetheSafetyLimitofpsig.Eachsafetyvalveisdesignedtorelieveibsperhooratthevalvesetpoint.ThesystemisdesignedtomeettheASMEBoilerandPressureVesselCoderequirements thatthenuclearsystemreliefvalvesshal=lfunctiontopreventopeningofthesafetyvalves.Althoughthesafetyvalvefunctionisnotexpectedtoberequiredunderthemostlimitingtransient, aninoperable valverequiresshutdowninordertocomplywithASMECoderequirements.
: a. The turbine bypass valve(s) indicate    a  compensating valve movement, or
Thetestingfrequency applicable tothereliefvalvefunctionofthesafety-relief valvesisprovidedtoensureoperability anddemonstrate reliability ofthevalves.Therequiredtestingintervalvarieswithobservedvalvefailures.
: b. The reactor coolant system pressure decreases by an amount equivalent to the valve pressure relieving capacity for the test conditions.
Thenumberofinoperable valvesfoundduringbothoperation andtestingofthesevalvesdetermines thetimeintervalforthenextrequiredtestofthesevalves.Earlytestsmaybeperformed priortoenteringthenextrequiredtestinterval(i.e.,inadvanceofthenominaltimelessthenegative25%tolerance band).Earlytestsmaybeusedasanewreference pointfortestsofthesametimeinterval, however,theyarenotacceptable forlengthening thetestintervalsincetheywerenotperformed withinthe+25%tolerance bandasrequiredbyTable4.4-10.Oemonstration ofthesafetyvalves'ift settingswilloccuronlyduringshutdownandwillbeperformed inaccordance withtheprovisions ofSectionXIoftheASMEBoilerandPressureVesselCode.
: 2. The  initial Next Required Test Interval of Table 4.4-10 shall be determined by the number of remotely operated relief and safety-relief valves found inoperable from September 1, 1977    to March 1, 1979.
: 3. The  initial  valve tests of Table 4.4-10 shall    be completed by, the  earlier of:
: a. The completion of the next refueling outage occurring after  March 1, 1979, or
: b. The time period defined by March 1, 1979 plus the initial test interval,  determined above.
: 4. At least once per 18 months, by conducting a visual inspection of the safety-relief valve line restraints in the torus to verify structural integrity for continued operation.
4.4.2.2    Each safety valve and the safety valve function of each safety-relief  valve shall be demonstrated operable per the requirements of the ASME Boiler    and Pressure  Vessel Code  (      ) Edition and Addenda through
(        ).                                                       V


EMERGENCY CORECOOLINGSYSTEMSAUTOMATIC DEPRESSURIZATION SYSTEMLIMITINGCONDITION FOROPERATION 3.5.2TheAutomatic Depressurization System(ADS)shallbeOPERABLEwithatleast(6)*OPERABLEADSvalves.APPLICABILITY:
TABLE  4.4-10 REHOTELY OPERATED RELIEF AND SAFETY-RELIEF VALVE TEST SCHEDULE NUHBER OF REHOTELY OPERATED RELIEF AND SAFETY-RELIEF VALVES                    NEXT REQUIRED FOUND INOPERABLE DURING TESTING OR TEST INTERVAL**                          TEST INTERVAL*
WithAverageCoolantTemperature
0                                                          18 months + 25%
>212'FortheModeSwitchinRun,orStartup/Hot Standby.ACTION:a.WithoneoftheaboverequiredADSvalvesinoperable, operation maycontinueprovidedtheactuation logicoftheremaining ADSvalvesisoperableandtheCSSandLPCIsystemsareoperable, andtheHPCIsystemisdemonstrated operablewithin4hours;restoretheinoperable ADSvalvetooperablestatuswit'iin14daysorbeshutdownwithin12hoursandreducetheAverageCoolantTemperature to<212'Fwithinthefollowing 24hours.b.WithtwoormoreoftheaboverequiredADSvalvesinoperable, beshutdownwithin12hoursandreducetheAverageCoolantTemperature to<212'Fwithinthefollowing 24hours.SURVEILLANCE REUIREMENTS 4.5.2Inadditiontotheapplicable ASMEBoilerandPressureVesselCode,SectionXIrequirements, theADSshallbedemonstrated operable:
1                                                        184 days  + 25K 2                                                        92 days  + 25%
a.Atleastonceper18monthsbyperformance ofasystemfunctional testwhichincludessimulated automatic actuation throughtheautomatic depressurization
3                                                        31 days  + 25%
: sequence, butexcluding valveactuation.
"The required test interval shall not be lengthened more than one step at a time.
b.UntilMarch1,1979,atleastonceper18monthsby:1.ManuallyopeningeachADSvalvewiththereactoratorbelow5Xratedpowerandatnominaloperating pressureandverifying thateither:a.Theturbinebypassvalve(s)indicateacompensating valvemovement, orb.Thereactorcoolantsystempressuredecreases byanamountequivalent tothevalvepressurerelieving capacityforthetestconditions.
Early tests may be performed prior to entering the "next required test interval" (i.e., in advance of the nominal time less the negative 25K tolerance band).
umeroAvavestobeconsistent withECCSanalysis.  
Early tests may be used as a new reference point for tests of the same interval, however, they are not acceptable for lengthening the test interval.
**Setpoint- drift is not considered to be a valve failure for the purposes of this test schedule.


EMERGENCY CORECOOLINGSYSTEMSAUTOMATIC DEPRESSUR IZATIONSYSTEMSURVEILLANCE REQUIREMENTS (Continued) 2.Conducting avisualinspection ofthesafety-relief andreliefvalvelinerestraints inthetorustoverifystructural integrity forcontinued operation.
I 3/4.4  REACTOR COOLANT SYSTEM BASES 3/4.4.2  SAFETY VALVES The reactor coolant system safety valves operate to prevent the reactor coolant system from being pressurized above the Safety Limit of        psig. Each safety valve is designed to relieve      ibs per hoor at the valve set point. The system is designed to meet the ASME Boiler and Pressure Vessel Code requirements that the nuclear system relief valves shal=l function to prevent opening of the safety valves.
c.AfterMarch1,1979,byperformance ofthefollowing testprogram:l.ManuallyopeningeachADSvalveinaccordance withthetestscheduleofTable4.4-10withthereactoratorbelow5%ratedpowerandatnominaloperating pressureandverifying thateither:a.Theturbine".ypassvalve(s)indicateacompensating valvemovement, orb.Thereactorcoolantsystempressuredecreases byanamountequivalent tothevalvepressurerelieving capacityforthetestconditions.
Although the safety valve function is not expected to be required under the most limiting transient, an inoperable valve requires shutdown in order to comply with ASME Code requirements.
2.TheinitialNextRequiredTestIntervalofTable4.4-10shallbedetermined bythenumberofremotelyoperatedreliefandsafety-relief valvesfoundinoperable fromSeptember 1,1977toMarch1,1979.3.TheinitialvalvetestsofTable4.4-10shallbecompleted by,theearlierof:a.Thecompletion ofthenextrefueling outageoccurringafterMarch1,1979,orb.ThetimeperioddefinedbyMarch1,1979plustheinitialte'stinterval, determined above.4.Atleastonceper18monthsbyconducting avisualinspection ofthesafety-relief andreliefvalvelinerestraints inthetorustoverifystructural integrity forcontinued operation.  
The testing frequency applicable to the relief valve function of the  safety-relief valves is provided to ensure operability and demonstrate reliability of the valves. The required testing interval varies with observed valve failures. The number of inoperable valves found during both operation and testing of these valves determines the time interval for the next required test of these valves. Early tests may be performed prior to entering the next required test interval (i.e., in advance of the nominal time less the negative 25% tolerance band). Early tests may be used as a new reference point for tests of the same time interval, however, they are not acceptable for lengthening the test interval since they were not performed within the +25% tolerance band as required by Table 4.4-10.
Oemonstration of the safety valves'ift settings will occur only during shutdown and will be performed in accordance with the provisions of Section XI of the ASME Boiler and Pressure Vessel Code.
 
EMERGENCY CORE COOLING SYSTEMS AUTOMATIC DEPRESSURIZATION SYSTEM LIMITING CONDITION        FOR OPERATION 3.5.2 The Automatic Depressurization System          (ADS) shall  be OPERABLE with at least (6 )* OPERABLE ADS valves.
APPLICABILITY: With Average Coolant Temperature > 212'F          or the  Mode Switch in Run, or Startup/Hot Standby.
ACTION:
: a. With one of the above required ADS valves inoperable, operation may  continue provided the actuation logic of the remaining ADS valves is operable and the CSS and LPCI systems are operable, and the HPCI system is demonstrated operable within 4 hours; restore the inoperable ADS valve to operable status wit'iin 14 days or be shutdown within 12 hours and reduce the Average Coolant Temperature to < 212'F within the following 24 hours.
: b. With two or more of the above required ADS valves inoperable, be shutdown within 12 hours and reduce the Average Coolant Temperature to < 212'F within the following 24 hours.
SURVEILLANCE RE UIREMENTS 4.5.2    In addition to the applicable ASME Boiler and Pressure Vessel Code, Section XI requirements, the ADS shall be demonstrated operable:
: a. At least once per 18 months by performance of a system functional test which includes simulated automatic actuation through the automatic depressurization sequence, but excluding valve actuation.
: b. Until  March 1, 1979,  at least once per 18 months by:
: 1. Manually opening each ADS valve with the reactor at or below 5X rated power and at nominal operating pressure and  verifying that either:
: a. The  turbine bypass valve(s) indicate  a  compensating valve movement, or
: b. The reactor coolant system pressure decreases by an amount equivalent to the valve pressur e relieving capacity for the test conditions.
um  er  o    A    va ves to be  consistent with ECCS analysis.
 
EMERGENCY CORE COOLING SYSTEMS AUTOMATIC DEPRESSUR IZATION SYSTEM SURVEILLANCE REQUIREMENTS   (Continued)
: 2. Conducting   a visual inspection of the safety-relief and  relief  valve line restraints in the torus to verify structural integrity for continued operation.
: c. After  March 1, 1979, by performance    of the following test program:
: l. Manually opening each ADS valve in accordance with the test schedule of Table 4.4-10 with the reactor at or below 5% rated power and at nominal operating pressure    and verifying that either:
: a. The turbine ".ypass valve(s) indicate  a  compensating valve movement, or
: b. The reactor coolant system pressure decreases by an amount  equivalent to the valve pressure relieving capacity for the test conditions.
: 2. The  initial Next Required Test Interval of Table 4.4-10 shall be determined by the number of remotely operated relief and safety-relief valves found inoperable from September 1, 1977 to March 1, 1979.
: 3. The  initial  valve tests of Table 4.4-10 shall    be completed by, the  earlier of:
: a. The completion of the next refueling outage occur ring after  March 1, 1979, or
: b. The time  period defined by March 1, 1979 plus the initial  te'st interval, determined above.
: 4. At least once per 18 months by conducting a visual inspection of the safety-relief and relief valve line restraints in the torus to verify structural integrity for continued operation.
 
3/4.5    EMERGENCY CORE COOLING SYSTEM BASES 3/4.5.2    AUTOMATIC DEPRESSURIZATION SYSTEM (ADS)
Upon  failure of the HPCIS to function properly after a small break  loss-of-coolant accident, the ADS automatically causes the safety-relief valves to open, depressurizing the reactor so that flow from the low pressure cooling systems can enter the core in time to limit fuel cladding temperature to less than 2200'F. ADS is conservatively required to be operable whenever .reactor vessel pressure exceeds ( 150) psig even though low pressure cooling systems provide adequate core cooling up to (350) psig.
ADS automatically controls (7 ) safety-relief valves although the safety analysis only takes credit for (6 ). Therefore    it is appropriate to permit (one) valve to be out-of-service without materially reducing system reliability.
The  testing frequency applicable to ADS valves is provided to ensure operability and demonstrate reliability of the valves. The required .test',ng interval varies with observed valve failures. The
,number of inoperable valves found during both operation and testing of these valves determines the time interval for the next required test of these valves.      Early tests may be performed prior to entering the next required test interval (i.e., in advance of the nominal time less the negative 25% tolerance band). Early tests may be used as a new reference point for tests of the same time interval, however, they are not acceptable for lengthening the test interval since they were not performed within the +25% tolerance band as required by Table 4.4-10.


3/4.5EMERGENCY CORECOOLINGSYSTEMBASES3/4.5.2AUTOMATIC DEPRESSURIZATION SYSTEM(ADS)-UponfailureoftheHPCIStofunctionproperlyafterasmallbreakloss-of-coolant
: accident, theADSautomatically causesthesafety-relief valvestoopen,depressurizing thereactorsothatflowfromthelowpressurecoolingsystemscanenterthecoreintimetolimitfuelcladdingtemperature tolessthan2200'F.ADSisconservatively requiredtobeoperablewhenever.reactorvesselpressureexceeds(150)psigeventhoughlowpressurecoolingsystemsprovideadequatecorecoolingupto(350)psig.ADSautomatically controls(7)safety-relief valvesalthoughthesafetyanalysisonlytakescreditfor(6).Therefore itisappropriate topermit(one)valvetobeout-of-service withoutmaterially reducingsystemreliability.
Thetestingfrequency applicable toADSvalvesisprovidedtoensureoperability anddemonstrate reliability ofthevalves.Therequired.test',ng intervalvarieswithobservedvalvefailures.
The,numberofinoperable valvesfoundduringbothoperation andtestingofthesevalvesdetermines thetimeintervalforthenextrequiredtestofthesevalves.Earlytestsmaybeperformed priortoenteringthenextrequiredtestinterval(i.e.,inadvanceofthenominaltimelessthenegative25%tolerance band).Earlytestsmaybeusedasanewreference pointfortestsofthesametimeinterval, however,theyarenotacceptable forlengthening thetestintervalsincetheywerenotperformed withinthe+25%tolerance bandasrequiredbyTable4.4-10.
~-
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0DocketNo.50-220~4l)'g0ig7NiagaraflohawkPowerCorporation ATTN:tfr.GeraldK.RhodeVicePresident
0 Distribution
-Engineering 300ErieBoulevard WestSyracuse, NeviYork13202Gentlemen:
                                                                                            ~~Docket ORB &#xb9;3 Local PDR
RE:NINEMILEPOINTNUCLEARSTATIONUNITNO.1Distribution
                                                        ~4l)'g  0 ig7 Docket No. 50-220                                                                         NRC PDR GLear CParrish JZwetzig Niagara flohawk Power Corporation                                                SNowicki ATTN:   tfr. Gerald K. Rhode                                                    Attorney,              OELD Vice President - Engineering                                             OI8E (3) 300 Erie Boulevard West                                                          DEisenhut Syracuse, Nevi York 13202                                                        TBAbernathy JRBuchanan Gentlemen:                                                                        ACRS         (16)
~~DocketORB&#xb9;3LocalPDRNRCPDRGLearCParrishJZwetzigSNowickiAttorney, OELDOI8E(3)DEisenhut TBAbernathy JRBuchanan ACRS(16)Ourreviewofdatareceivedfromreactorvesselmaterialsurveillance programsindicates thatthematerials usedinreactorvesselfabrication mayhaveawidervariation fnsensitivity toradiation damagethanoriginally anticipated.
RE:    NINE MILE POINT NUCLEAR STATION UNIT NO.                        1 Our review of data received from reactor vessel material surveillance programs indicates that the materials used in reactor vessel fabrication may have a wider variation fn sensitivity to radiation damage than originally anticipated.         In addition, some reactor vessels incorporate more than one heat        of materials, including vleld metals fn their beltlfne regions, but all of these heats may not be included in the reactor vessel material surveillance program.
Inaddition, somereactorvesselsincorporate morethanoneheatofmaterials, including vleldmetalsfntheirbeltlfneregions,butalloftheseheatsmaynotbeincludedinthereactorvesselmaterialsurveillance program.Althoughourreviewofthesedatadoesnotrevealabasisforconcernregarding continued reactorvesselintegrity overthenextseveralyears,theinformation doesindicatetheneedforadetailedreviewofthematerials employedinreactorvesselconstruction (fnlightofthisrecentdata)andareviewofthespecimens employedinthesurveillance programtodetermine ffthepresentspecimens reasonably represent thelimitingmaterials fnthe.reactorvesselbeltlfneregion.Inordertoperformthesereviews,wewillneedtheinformation listedfntheenclosure relativetoeachofyourreactorvessel(s) andassocfated surveillance specimens.
Although our review of these data does not reveal a basis for concern regarding continued reactor vessel integrity over the next several years, the information does indicate the need for a detailed review of the materials employed in reactor vessel construction (fn light of this recent data) and a review of the specimens employed in the surveillance program to determine            ff  the present specimens reasonably represent the limiting materials fn the .reactor vessel beltlfne region.
'Accordingly, youarerequested tosupplyonesignedorfgfnaland39copiesoftheinformation listedintheenclosure within60 daysofreceiptofthisletter.This.requestforgenericinformation wasapprovedbyGAOunderablanketclearance number8-180225(R0072);thisclearance expiresJuly31,1977.Sincerely, OriginalsipnedbyGeorgeLear,ChiefOoeratinReactors8nch&#xb9;3officc3a-losureand'cc:nextpageSURNAMCQSeDATC~lormhEC-318(Rev.9-53)AKCM0240DivisonopOpera)ORB&#xb9;3~owicki-----....5/..../7.7............
In order to perform these reviews,             we  will          need the          information listed fn the enclosure relative to            each        of your reactor vessel(s) and  assocfated surveillance specimens.
ORB%~--JZwetzig'----.....5l..g./.7.7............,...
Accordingly, you are requested to supply one signed orfgfnal and 39 copies of the information listed in the enclosure within60 days of receipt of thi s letter.
ORB&#xb9;3~--CPaZr1sfAmj-5/..5/.7.7.............,
This. request    for generic information was approved by GAO under a blanket clearance number 8-180225 (R0072); this clearance expires July 31, 1977.
QU,4,ODVCANMCNT fNINTIN4OffCCI1474S20eSSORB&#xb9;3BLeer~.ah.a.7.............
Sincerely, Original sipned by George Lear, Chief Ooeratin Reactors                          8      nch &#xb9;3 of ficc3a-Divis on op Opera)                                                            ORB    &#xb9;3 SURNAMCQ DATC~
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Latest revision as of 19:55, 4 February 2020

Letter Regarding Surveillance Requirements and Limiting Conditions for Operations and Requesting an Application for Amendment to the Operating License That Will Change the Technical Specifications
ML17037C433
Person / Time
Site: Nine Mile Point Constellation icon.png
Issue date: 08/08/1977
From: Lear G
Office of Nuclear Reactor Regulation
To: Rhode G
Niagara Mohawk Power Corp
References
Download: ML17037C433 (20)


Text

=

Distribution AUG 8 1977 Docket ORB 83 CParrish Docket No. 50-220 GLear SNowicki DVerrelli Local PDR Niagara mohawk Power Corporation NRC PDR ATTN: Nr. Gerald K. Rhode Attorney, OELD Vice President - Engineering OI&E (3) 300 Erie Boulevard West DEisenhut Syracuse, New York 13202 TBAbernathy NRBuchanan Gentlemen: ACRS (16)

RE: NINE NILE POINT NUCLEAR STATIOfl UNIT NO. 1 In the past several years, a significant number of relief valves and safety-relief valves were found to be inoperable at BWR reactor facili-ties. These valves were installed in the Reactor Coolant System and/or Automatic Depressurization System. Several programs have been developed to reduce the incidence of these valve failures; however, additional failures continue to occur.

Consequently, we have concluded that changes to the Surveillance Require-ments and Limiting Conditions for Operations for all BHR's are needed to provide additional assurance of relief valve and safety-relief valve operabflity and reliability. Therefore, we request that you modify your surveillance testing program through the adoption of the program contained in the model technical specifications we have prepared. The elements of this program include:

Each remot ly operated relief valve and safety-relief valve fn the Reactor Coolant System and Automatic Depressurizatfon System will be tested on a variable frequency schedule related to demonstrated reliability and operability. The testing interval is based on the number of valve failures during the required test interval. Facilities with reliable valves will progress to a longer test interval while those with valve failures will progress to a shorter test interval. This concept should result in the maintenance of a more uniform level of reliability for this equipment than previously obtained.

2. The increased surveillance program will become effective on Harch 1, 19T9. No increase in valve, testing is required before that date.

The initial testing interval. of the increased surveillance program will be based on the number of remotely operated relief valves and safety-relief valves found inoperable in the previous 18 months 1, 1977 to March 1, 1979). This lead time will permit pP'September the resolution of the Hark I Safety-Relief Valve Loads and DFPICE~

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'other corrective actions prior to implementing the test program.

3. The relief and/or safety-relief valve line restraints in the torus will be examined prior to initiating the test program and at least once each fuel cycle (f.e., each 18 months) to verify continued structural integrity.

We request that you submit within 30 days from your receipt of this 'letter, an application for amendment to your license that will change your technical specifications to be in conformance wfth the requirements of the enclosed model technical specifications and associated'bases. In the event you should desire further dfscussion of this matter, please contact us.

Sincerely, Original signed bV George Lear, Chief Operating Reactors Branch 83 Division of Operating Reactors

Enclosure:

Model Technical Specifications CC:

Arvin E. Upton, Esquire LeBoeuf, Lamb, Lefby 5 NacRae 1757 N Street, H. W.

Washington, D. C. 20036 Anthony Z. Rofsman, Esquire Rofsman, Kessler and Cashdan 1025 15th Street, N. H.

5th Floor Washington, D. C. 20005 Nr. Eugene G. Saloga, Applicant Coordinator

., Nine Nile Point Energy Information Center P. 0. Box 81 Lycoming, Nes( York 13093 ORB 3 ORB k3 ORB ii3 j ORB 83 OFFICS~

SU/NAME& CParrish SNowick jf DV ~rl I GLear DATE~

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REACTOR COOLANT SYSTEM 3/4.4.2 SAFETY VALVES LIMITING CONDITION FOR OPERATION 3.4.2 At least the following reactor coolant system code safety valves and safety-relief valves shall indicated pressures.

be operable with lift settings within + 1% of the (2)* Safety valves 9 (1240) psig (3) Safety-relief valves 9 ( 1100) psig (3 ) Safety-relief valves 9 ( 1090) psig (3) Safety-relief valves 9 (1080) psig APPLICABILITY: With Average Coolant Temperature > 212'F or the Mode Switch in Run, or Startup/Hot Standby.

ACTION:

With one or more reactor coolant system code safety valve(s) or a safety-relief valve(s) inoperable either restore the valve(s) to operable status within 15 minutes or be. shutdown within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and reduce Average Coolant Temperature to < 212'F withinthe next 24 hours..

SURVEILLANCE RE UIREMENTS 4.4.2.1 In addition to the applicable ASME Boiler and Pressure Vessel Code,Section XI requirements, each safety-relief valve shall be demonstrated operable:

a. At least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, by verifying bellows integrity through instrument indication.
b. Until March 1, 1979, at least once per 18 months by:
1. Manually opening each remotely operated .safety-relief valve with the reactor at or below 5% rated power and at nominal operating pressure, and verifying that either:
a. The turbine bypass valve(s) indicate a compensating valve movement, or
b. The reactor coolant system pressure decreases by an amount equivalent to the valve pressure relieving capacity for the test conditions.

d d f

REACTOR COOLANT SYSTEM SURVEILLANCE RE UIREMENTS (Continued)

2. Conducting a visual inspection of the safety-relief valve line restraints in the torus to verify structural integrity for continued operation.
c. After March 1, 1979, by performance of the following test program:
1. Manually opening each remotely operated safety-relief valve in accordance with the test schedule of Table 4.4-10 with the reactor at or below 5X rated power and a steam at nominal operating pressure and verifying that either:
a. The turbine bypass valve(s) indicate a compensating valve movement, or
b. The reactor coolant system pressure decreases by an amount equivalent to the valve pressure relieving capacity for the test conditions.
2. The initial Next Required Test Interval of Table 4.4-10 shall be determined by the number of remotely operated relief and safety-relief valves found inoperable from September 1, 1977 to March 1, 1979.
3. The initial valve tests of Table 4.4-10 shall be completed by, the earlier of:
a. The completion of the next refueling outage occurring after March 1, 1979, or
b. The time period defined by March 1, 1979 plus the initial test interval, determined above.
4. At least once per 18 months, by conducting a visual inspection of the safety-relief valve line restraints in the torus to verify structural integrity for continued operation.

4.4.2.2 Each safety valve and the safety valve function of each safety-relief valve shall be demonstrated operable per the requirements of the ASME Boiler and Pressure Vessel Code ( ) Edition and Addenda through

( ). V

TABLE 4.4-10 REHOTELY OPERATED RELIEF AND SAFETY-RELIEF VALVE TEST SCHEDULE NUHBER OF REHOTELY OPERATED RELIEF AND SAFETY-RELIEF VALVES NEXT REQUIRED FOUND INOPERABLE DURING TESTING OR TEST INTERVAL** TEST INTERVAL*

0 18 months + 25%

1 184 days + 25K 2 92 days + 25%

3 31 days + 25%

"The required test interval shall not be lengthened more than one step at a time.

Early tests may be performed prior to entering the "next required test interval" (i.e., in advance of the nominal time less the negative 25K tolerance band).

Early tests may be used as a new reference point for tests of the same interval, however, they are not acceptable for lengthening the test interval.

    • Setpoint- drift is not considered to be a valve failure for the purposes of this test schedule.

I 3/4.4 REACTOR COOLANT SYSTEM BASES 3/4.4.2 SAFETY VALVES The reactor coolant system safety valves operate to prevent the reactor coolant system from being pressurized above the Safety Limit of psig. Each safety valve is designed to relieve ibs per hoor at the valve set point. The system is designed to meet the ASME Boiler and Pressure Vessel Code requirements that the nuclear system relief valves shal=l function to prevent opening of the safety valves.

Although the safety valve function is not expected to be required under the most limiting transient, an inoperable valve requires shutdown in order to comply with ASME Code requirements.

The testing frequency applicable to the relief valve function of the safety-relief valves is provided to ensure operability and demonstrate reliability of the valves. The required testing interval varies with observed valve failures. The number of inoperable valves found during both operation and testing of these valves determines the time interval for the next required test of these valves. Early tests may be performed prior to entering the next required test interval (i.e., in advance of the nominal time less the negative 25% tolerance band). Early tests may be used as a new reference point for tests of the same time interval, however, they are not acceptable for lengthening the test interval since they were not performed within the +25% tolerance band as required by Table 4.4-10.

Oemonstration of the safety valves'ift settings will occur only during shutdown and will be performed in accordance with the provisions of Section XI of the ASME Boiler and Pressure Vessel Code.

EMERGENCY CORE COOLING SYSTEMS AUTOMATIC DEPRESSURIZATION SYSTEM LIMITING CONDITION FOR OPERATION 3.5.2 The Automatic Depressurization System (ADS) shall be OPERABLE with at least (6 )* OPERABLE ADS valves.

APPLICABILITY: With Average Coolant Temperature > 212'F or the Mode Switch in Run, or Startup/Hot Standby.

ACTION:

a. With one of the above required ADS valves inoperable, operation may continue provided the actuation logic of the remaining ADS valves is operable and the CSS and LPCI systems are operable, and the HPCI system is demonstrated operable within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />; restore the inoperable ADS valve to operable status wit'iin 14 days or be shutdown within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and reduce the Average Coolant Temperature to < 212'F within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
b. With two or more of the above required ADS valves inoperable, be shutdown within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and reduce the Average Coolant Temperature to < 212'F within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

SURVEILLANCE RE UIREMENTS 4.5.2 In addition to the applicable ASME Boiler and Pressure Vessel Code,Section XI requirements, the ADS shall be demonstrated operable:

a. At least once per 18 months by performance of a system functional test which includes simulated automatic actuation through the automatic depressurization sequence, but excluding valve actuation.
b. Until March 1, 1979, at least once per 18 months by:
1. Manually opening each ADS valve with the reactor at or below 5X rated power and at nominal operating pressure and verifying that either:
a. The turbine bypass valve(s) indicate a compensating valve movement, or
b. The reactor coolant system pressure decreases by an amount equivalent to the valve pressur e relieving capacity for the test conditions.

um er o A va ves to be consistent with ECCS analysis.

EMERGENCY CORE COOLING SYSTEMS AUTOMATIC DEPRESSUR IZATION SYSTEM SURVEILLANCE REQUIREMENTS (Continued)

2. Conducting a visual inspection of the safety-relief and relief valve line restraints in the torus to verify structural integrity for continued operation.
c. After March 1, 1979, by performance of the following test program:
l. Manually opening each ADS valve in accordance with the test schedule of Table 4.4-10 with the reactor at or below 5% rated power and at nominal operating pressure and verifying that either:
a. The turbine ".ypass valve(s) indicate a compensating valve movement, or
b. The reactor coolant system pressure decreases by an amount equivalent to the valve pressure relieving capacity for the test conditions.
2. The initial Next Required Test Interval of Table 4.4-10 shall be determined by the number of remotely operated relief and safety-relief valves found inoperable from September 1, 1977 to March 1, 1979.
3. The initial valve tests of Table 4.4-10 shall be completed by, the earlier of:
a. The completion of the next refueling outage occur ring after March 1, 1979, or
b. The time period defined by March 1, 1979 plus the initial te'st interval, determined above.
4. At least once per 18 months by conducting a visual inspection of the safety-relief and relief valve line restraints in the torus to verify structural integrity for continued operation.

3/4.5 EMERGENCY CORE COOLING SYSTEM BASES 3/4.5.2 AUTOMATIC DEPRESSURIZATION SYSTEM (ADS)

Upon failure of the HPCIS to function properly after a small break loss-of-coolant accident, the ADS automatically causes the safety-relief valves to open, depressurizing the reactor so that flow from the low pressure cooling systems can enter the core in time to limit fuel cladding temperature to less than 2200'F. ADS is conservatively required to be operable whenever .reactor vessel pressure exceeds ( 150) psig even though low pressure cooling systems provide adequate core cooling up to (350) psig.

ADS automatically controls (7 ) safety-relief valves although the safety analysis only takes credit for (6 ). Therefore it is appropriate to permit (one) valve to be out-of-service without materially reducing system reliability.

The testing frequency applicable to ADS valves is provided to ensure operability and demonstrate reliability of the valves. The required .test',ng interval varies with observed valve failures. The

,number of inoperable valves found during both operation and testing of these valves determines the time interval for the next required test of these valves. Early tests may be performed prior to entering the next required test interval (i.e., in advance of the nominal time less the negative 25% tolerance band). Early tests may be used as a new reference point for tests of the same time interval, however, they are not acceptable for lengthening the test interval since they were not performed within the +25% tolerance band as required by Table 4.4-10.

~-

0 Distribution

~~Docket ORB ¹3 Local PDR

~4l)'g 0 ig7 Docket No. 50-220 NRC PDR GLear CParrish JZwetzig Niagara flohawk Power Corporation SNowicki ATTN: tfr. Gerald K. Rhode Attorney, OELD Vice President - Engineering OI8E (3) 300 Erie Boulevard West DEisenhut Syracuse, Nevi York 13202 TBAbernathy JRBuchanan Gentlemen: ACRS (16)

RE: NINE MILE POINT NUCLEAR STATION UNIT NO. 1 Our review of data received from reactor vessel material surveillance programs indicates that the materials used in reactor vessel fabrication may have a wider variation fn sensitivity to radiation damage than originally anticipated. In addition, some reactor vessels incorporate more than one heat of materials, including vleld metals fn their beltlfne regions, but all of these heats may not be included in the reactor vessel material surveillance program.

Although our review of these data does not reveal a basis for concern regarding continued reactor vessel integrity over the next several years, the information does indicate the need for a detailed review of the materials employed in reactor vessel construction (fn light of this recent data) and a review of the specimens employed in the surveillance program to determine ff the present specimens reasonably represent the limiting materials fn the .reactor vessel beltlfne region.

In order to perform these reviews, we will need the information listed fn the enclosure relative to each of your reactor vessel(s) and assocfated surveillance specimens.

Accordingly, you are requested to supply one signed orfgfnal and 39 copies of the information listed in the enclosure within60 days of receipt of thi s letter.

This. request for generic information was approved by GAO under a blanket clearance number 8-180225 (R0072); this clearance expires July 31, 1977.

Sincerely, Original sipned by George Lear, Chief Ooeratin Reactors 8 nch ¹3 of ficc3a-Divis on op Opera) ORB ¹3 SURNAMCQ DATC~

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