Text

Proposed Tech Specs Pages,Revising EDG Surveillance Requirements to Delete Requirement for 18-month Insp IAW Procedures Prepared in Conjunction W/Vendor Recommendations & Modify SRs Associated W/Verifying Capability of DGs
	ML20203J168
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Site:	Sequoyah
Issue date:	02/25/1998
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l

, ENCLOSURE 2

. 1 TENNESSEE VALLEY AUTHORITY SEQUOYAH PLANT (SQN)

UF *S 1 and 2 PROPOSED TECHNICAL STECIFICATION (TS) CHANGE TS-97-06 NARKED PAGES I. AFFECTED PAGE LIST Unit 1 3/4 P-3 3/4 8-4 3/4 8-5 3/4 8-6 B3/4 8-la Unit 2 3/4 8-3 3/4 8-4 3/4 8-5 3/4 8-6 B3/4 8-la II. MARKED PAGES See attached.

9803040005 980225 PDR ADOCK 05000327 P PDR E2-1

' ILECT4ICAL 701GR SYSTEMS SURVRILLhMCI REQUIREMENTS (Continued) 4.e.1.1.2 Each diesel generator set shall be demonat; rated OPERABLE:

a.

At least once per 31 days on a staggered test 5Esis by:

lR230 1.

Verifying the fuel level in the engine-mounted day tanks.

2. Verifying the fuel level in the 7 day tank.

3.

1"((g #

Verifying the fuel transfer pump can be started and transfers fuel from the stotage system to the engine mounted fuel tanks, y gy 4.

Verifying the diesel starts from ambient condition and achieven

_,y

,T g 1,g ,u frequencygo in less than or equal to 10 seconds -gemewetosP voltage and f M00 ; '^t cel;;; M '^ ; i ?-- M. The diesel R199 r'~{inerator shall be started for this test by using oss of the

.z ttoovW.uted following signals witt, startup on each signal verified at least g 3 gggg 1 once per 124 days:

(RSE

1 u.2 4 a) Manual.

i b) simulated loss of offsite power by itself.

c) Ln ESF actuation test signal by itself. W t

5, l

Verifying the generator is synchronized, loaded between 3960.F.w R177 and 4400 kw in less than or equal to 60 seconds, and operates for greater than or equal to so minutes, and .

E.

Verifying power to thetheassociated diesel generator shutdown is boards, aligned to provide standby '

l

b. At least once per 31 days and after each operation of the diesel-where the period of operation was greater than or equal to 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months by checking fuel tanks. for and removing accuanlated water from the engine-mounted

c. At least once per 92 days and from nov fuel oil prior to addition to the 7-day tanks by verifying that a sample obtained in accordance with ASTM-D270-1975 equal to. 05 volume has a water and sediment content of less than or percent and a kinematic viscosity e lon*F of greater than or equal to 1.8 but less than or equal to 5.8 centi-stokes when tested in accordance with ASTM-D975-77, and an impurity level of less than 2 mg. of insolubles per 100 al. when tested in accordance with ASTM-D2274-70.

The diesel generator start (10 sec) and load (60 sec) from standby conditions shall be performed at least once per 184 days in these surveillance tests. All other diesel generacer engine starts and loading for the purpose of this RS6 surveillance testing may be preceded by an engine-idle start, followed by gradual acceleration synchronisation, andto synchronous gradual loading.speed (approximately L tb Wh 300 rpm), Ms do d cut to sm4 agme aWh* lR199 July 14, 1997 SEQUOYAH - UNIT 1 3/4 e-3 Amendment Nos. 52, 64, 99, 109, 137, 173, 195, 225 f ..

ELECTRICAL POWEA SYSTDts SURVEILLAlltE REQUIRDIENTS fContinued)

d. At least once per 18 months during shutdown by:

mn n>

1. # Subject 1 the diesel to n inspection in acco ance with proc s prepared in njunction with its nufacturst's rec ndations for is class of standby rvice, ,

M_tocmPG O To 54 (T.I.t .2. A.1

2. { Verifying the generator capability to reject a load of greater i than or equal to 600 kw while maintaining voltage within i "IU3 1 10 percent of the initial protest voltage and frequency at 60 i 1.2 Hz. At no time shall the transient voltage exceed ut276V.f L anere no a v.s.s.i.z.s.t

3. (Torifying the generator capability to reject a load of 4400 kw]R68 without trip ng. The generator voltage shall not exceed 8880V l during arid f lowing the load re.iection u at74 j

4. Simulating a loss of offsite power by itself, and:

a) Verifying tie-energitation of the shutdown boards and load shedding from the shutdown boards, f b) Verifying the diesel starts on the auto-start signal, energizes the shutdown boards with permar.ently connected ..

loads within 10 seconds, energizes the auto-connected shutdown loads through the load sequencers and operates for greater than or equal to 5 minutes while its generator is loaded with the shutdown loads. After energization, the steady state voltage and frequency g the shutdown boards shall be maintained at ;;;; i ; nit;'and I:n? iu1.fm Hz u.t during this test.1'- r acau amov

5. Verifying that on a EST actuation test signal (without loss of offsite power) the diesel generator starts on the auto-start signal and operates on standby for greater than or equal to 5 minutes. The generator voltage and frequency shall be 2 a*M2nw 55 i 5"" -!t: f C i 1.2 M within 10 seconds after the AHy auto-start si the steady state generator voltage and fro-

- t 'd*.*> quency shall' _

ntainedaw Mh4e t h a 1 %ite during this test._ R53 G+ utoov e mov . a z sr.2 % o~t w.u s

6. Simulating a loss of offsite power in conjunction with an ESF actuation test signal, and a) Verifying de-energization of the shutdown boards and load shedding f.on -

the shutdown boards, atts b) Verifying the diesel starts on the auto-start signal, energizes the shutdown boards with permanently connected loads w* hin 10 seconds, energizes the auto-connected emergency (accident) loads through.the lond sequencers and operates for greater than or equal to 5 minutesAfter while its generator is loaded with the emergency loads.

energitation, the steady state voltage and frequency of the MAM ::m=g h::03 shall be maintained at nraN OT 1(;;;mov wi's y ;

~

anld 50 no-a zn.s i 1.: ti:s during u,u, this test.

Amendment No. 4g,64,114,137,154,170, 99 SEQUOYAH - UNIT 1 Ausust 27, 1993

ELECTRICAL POWER SYSTEMS SURMittANCE REQUIREMENTS (Continued) c) Verifying that all automatic diesel generator trips, except engine overspeed and generator differential, are automati-cally bypassed upon loss of voltage on the shuthwn board and/or safety injection actuation signal.

Oc toc a t r. h to SR s. u .6.t . 2 . g . 3 4 % T .i. l . t .t. 4 _ _ _ _

rying the diesel generator operates for at least 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

7. furing D the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months to 2.25 hours2.893519e-4 days 0.00694 hours 4.133598e-5 weeks 9.5125e-6 months of this test, the diesel R177]

generator shall be loaded between 4620 kw and 4840 kw and between 2380 kvar and 2600 kvar and during the remaining hours of this test, the diesel generator shall be loaded between 3960 kw and 4400 kw and between 2140 kvar and 2370 kvar.

/

1

' The generator voltage and frequency shall be 6900 1 690 volts R113j and 60 i 1.2 Hz within 10 seconds after the start signal; the steady state generator voltage and frequency shall be maintained within these limits during this test. Within 5 minutes after ig313 l completing this 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months test, perform Specification l Q8.1.1.2.d.4.b. --

J

8. Verifying that the auto-connected loads to each diesel generator R68 do r.:.1 exceed the continuous rating of 4400 kw.

9. Verifying the diesel generator's capability to:

a) Synchronize with the offsite power source while the genera-tor is loaded with its emergency loads upon a simulated restoration of offsite power.

b) Transfer its loads to the offsite power source, and c) Be restored to its shutdown status.

10. Verifying that the automatic load sequence timers are OPERABLE with the setpoint for each sequence timer within i 5 percent of its design setpoint.

11. Verifying that the following diesel generator lockout features prevent diesel generator starting only when required:

a) Engine overspeed b) 86 GA lockout relay

e. At least once per 10 years or after any modifications which could affect diesel generator interdependence by starting the diesel R199 generators simultaneously and verifying that each diesel generator achieves in less than or equal to 10 seconds,000 2'no J.IT volts and 40-.

4-b.4 Hz ,

(E n.1 ,

i February 9, 19 M l SEQUOYAH - UNIT 1 3/4 8-5 Amendrr,ent No. 52,64,109,114, 137,173, 195

. ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

R2 L7

f. At least once per 10 years by:

1. Draining each fuel oil storage tank, removing the accumulated sediment and cleaning the tank using a sodium'hypoclorite solution, and

2. Performing a pressure test of those portions of the diesel fuel oli system design to Section III, subsection ND of the ASME Code at a test pressure equal to 110 percent of the

h. a_ w. err system design pressure.

4.8.1.1.3. The 125-volt D.C. distribution panel,125-volt D.C. battery bank and associated charger for each diesel generator shall be demonstrated OPERABLE:

a. At least once per 7 days by verifying: ,

1. That the parameters in Table 4.8-la meet the Category A limits.

2. That the total battery teminal voltage is greater than or equal to 124-volts on float charge.

b. At least once per 92 days by:

1. Verifying that the parameters in Table 4.8-la meet the Category B limits,

2. Verifying there is no visible corrosion at either teminals or connectors, or the cell to terminal connection resistance of these items is less than 150 x 10 ohns, and

3. Verifying that the average electrolyte temperature of 6 - R2 ',7 connected cells is above 60*F.

c. At 1*ast once per 18 months by verifying that:

1. The cells, cell plates and battery racks show no visual indication of physical damage or abnomal deterioration.

2. The battery to battery and terminal connections are clean, tight and coated with anti-corrosion material.

3. The resistance of each cel,1 to teminal connection 1: lest than or equal to 150 x 10' chas.

4.8.1.1.4 Renorts - All diesel generator failures, valid or non-valid, shall liS6 be reported to the Comission. pursuant to Specification 6.g.2.2.

October 4, 1995 SEQUOYAH - UNIT 1 3/4 8-6 Amendment No. 52, 137, 213

Insert to page Unit 1 3/4 8-6

g. At least once per 18 months by:

1. Verifying the generator capaht11ty to reject a load of greater than or equal ts 600 kw while maintaining voltage within i R103 10 percent of the initial pretest voltage and frequency at 60 t 1.2 Hz. At no time shall the transient voltage exceed 8276V.

2 Verifying the generator capability to reject a load of 4400 kw without tripping. The generator voltage shall not exceed 8880V lR68 l during and following the load rejection. R174

3. Verifying the diesel generator operates for at least 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

During the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months to 2.25 hours2.893519e-4 days 0.00694 hours 4.133598e-5 weeks 9.5125e-6 months of this test, the diesel R177 generator shall be loaded between 4620 kw and 4840 kw and between 2380 kvar and 2600 kvar and during the remaining hours E of this test, the diesel generator shall be loaded between 3960 kw and 4400 kw and between 2140 kvar and 2370 kvar. ,

arm eqie z c= vd"^isi.s"~ A The generator voltage and frequency shall be '^^^ ' R113 and-50 i 1.'! Hf within 10 seconds after the start signal.) the steady state generator voltage and frequency shall be maintained

' f at n uova.4 wFthin-the - ' " " r - this test. Within 5 ;;;instes . iter

I E m.ov o~e nw coopht4ng ibis 24 *- -6, perfeiin Sguific.iien* lR118 QS t.i t u_. 4TBA_1 2.d. W

4. Within 5 minutes of shutting down the diesel generator after it has operated 2 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months loaded between 3960 kW and 4400 kW and between 2140 kVAR and 2370 kVAR verify that the diesel generator starts within 10 seconds after receipt of the start signal and opecates for greater than or equal to 5-minutes. Yhe steady state voltage and -

frequency shall be maint ined at 6000 2. :00 'icid and CD i' 4,4#Hz during this test. 3'" I *0 V 251.'s HM i 412. W a N" "Y'.

t t . - . . .

_ __ _._._._ _.-~_-_____ . _ _ _ _ _ _ _ . _ _ _ . _ _

4 .

l 3/4.8 ELECTRICAL POWER SYSTEMS

^

f BASES l 3/4.8-1 and 3/4.8.2 A.C. SOURCES AND ONSITE POWER DISTRIBUTION SYSTEMS the yard storage tanks prior to the start of the-chemical cleaning of any underground storage tank. Witnin practical limits, the chemical cleaning of an R141

-l underground storage-tank will be performed during a refueling or nther

scheduled outage for the associated unit. .

t The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution systems during shutdown and refueling ensures that 1) the facility can be maintained in the shutdown or refueling condition for extended time periods and 2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.

2 i

The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guides 1.9 " Selection of Die:;el Generator Set Capacity for Standby Power Sup-l plies," March 10,1971, and 1.108 " Periodic Testing of Diesel Generator Units l Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1 August 1977, and 1.137 " Fuel-Oil Systems for Standby Diesel Generators," Revi-sion 1, October 1979. The surveillance requirements for the diesel generator

, load-run test and the 24-hour endurance and margin test are in accordance .fith- l R177 Regulatory Guide 1.9, Revision 3, July 1993, " Selection, Design, Qualification, and Teating of Emergency Diesel Generator Units Used as Class IE Onsite Elec-tric Power Systems at Nuclear Power Plants." During the diesel generator endurance and margin surveillance test, momentary transients outside the kw and

kvar load ranges do not invalidate the test results. Similarly, during the

! diesel generator load-run test, momentary transients outside the kw load range i do not invalidate the test results.

l su /vvA

! The Surveillance Requirement for demonstrating the OPERABILITY of the Station batteries are based on the recommendations of Regulatory Guide 1.129-

! " Maintenance Testing and Replacement of Large Lead Storage Batteries for-l Nuclear Power Plants," February 1978, and IEEE Std 450-1980, "IEEE Recommended

, Practice for Maintenance Testing, and Replacement of Large Lead Storage !

j Batteries for Generating Stations and Substations."

i i

i June 29, 1995 l R209 SEQUOYAH - UNIT 1 B 3/4 8-la Amendment No. 12, 137, 173, l 205

Insert to B 3/4 8-la Where the SRs discussed herein specify voltage and frequency tolerances, the following is applicable. 6800 volts is the minimum steady state output voltage and the 10 second transient value. 6800 volts is 98.6% of nominal bus toltags of 6900 V and is based on the mlnimum-voltage required for the D/G supply breaker to close on the 6.9 kV shutdown board. The specified ,

maximum steady state output voltage of 7260 V is based on the ~

degraded over voltage relay setpoint and is equivalent to 110% of the nameplate rating of the 6600 V motors. The specified minimum and maximum frequencies of the D/G are 58.8 Hz and 61.2 Hz, respectively. These values are equal _to i 2% of the 60 Hz nominal frequency and are derived from the recommendations given in Regulatory Guide 1.9.

l

EtJ!CTRICAL POWYR SYSTEMS

' SURVEILLANCE REQUIREMENTS (Continued) 4.8.1.1.2 Each diesel generator set shall be demonstrated OPERABLE:

a. At least once per 31 days on a staggered test basis by: lR217

1. Verifying the fuel level in the engine-mounted day tanks.

2. Verifying the fuel level in the 7 day tank.

3. Verifying the fuel transfer pump starts and transfers fuel from the storage system to the engine mounted fuel tanks.

(R E 41mV M ? 31.1Mg

4.

Verifying the diesel achieves in less than starts from ambient condition and or equal to 10 seconds g-.M Q ack,evu ___voltaceandfrequency/shallh;0000 ; 590 ;1t. d A a 54eadplake 60 : 1 ? s . The diesel generator shall be started for this R186 witay W t,epq test by using one of the following signals with startup on i

g g 7g each signal verified at least once per 124 days: R99 b Q 3 si,1 p, y a) Manual.

I 5 U.2 da , b) Simulated loss of offsite power by itself, c) An ESF actuation test signa. -:y itself. R44

5.

Verifying the generator is synchronized, loaded between 3960 kw and 4400 kw in less than or equal to 60 seconds, and operates for greater than or equal to 60 minutes, and R164

6. Verifying the diesel generator is aligned to provide standby .

power to the associated shutdown boards.

b. At least once per 31 days and after each operation of the diesel where the period of operation was greater than or equal to 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months by checking for and removing accumulated water from the engine-mounted fuel tanks.

c. At least once per 92 days and from new fuel oil prior to addition to the 7-day tanks by verifying that a sample obtained in I

accordance with ASM-D270-1975 has a water and sediment content of l less tLan or equal to .05 volume percent and a kinematic visecm t.y l e 100*F of greater than or equal to 1.8 but less than or equal to I 5.8 centi-stokes when tested in accordance with ASM-D975-77, and i l

an impurity level of less than 2 mg. of insolubles per 100 ml. when tested in accordance with AS M-D2274-70.

The diesel gener. tor start (10 sec) and load (60 sec) from standby conditions shall be performed at least once per 184 days in these surveillance tests. All R44 other diesel generator engine starts and leading for the purpose of this surveillance testing may be preceded by an engine idle stet, followed by gradual acceleration to synchronous speed (approximately Soc rpm) .

synchronization, and gradual loading. L nh loh e 4g ge e 5,co.J reparem ed clr af- lR186 July 14, 1997 SEQUOYAH - UNIT 2 3/4 8-3 Amendment Nos. 44, 56, 88, 99, l 123, 164, 186, 217

,. '~' ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

d. At least wecTeb once per 18 months during shutdown by:

i R

j

1. Subjecting diesel to an i pection in acco ce with

procedu prepared in con etion with its reco ufacturer's j ations for this ass of standby vicu,,

' RClous__TET) Tb__sR u g,s.1 3.

j

2. Verifying the generator capability tn reject a load of greater" i

than or equal to 600 kw while maintaining voltage at within i ggg 10 percent of the initial pretest voltage and frequency at 60 t 1.2 Hz. At no time shall the transient voltage exceed 8276V f-pewiSTGD To tL 4 7.I.l. A = 2 ._.

3.

Verifying the generatEcapability to reject a load of 4400 kw h56 without tripping. The generator voltage shall not exceed 8880V lR16 during and following the load rejection.f - _

4. Simulating a loss of offsite power by itself, and:

4

' a) Verifying de-energization of the shutdown boards and load shedding from the shutdown boards.

b) Verifying the diesel starts on the auto-start signal, i

energizes the shutdown boards with pennanently connected .

loads within 10 seconds, energizes the auto-connected shutdown loads through the load sequencers and operates ._

for greater than or equal to 5 minutes while its generator f is loaded with the shutdown loads. After energization, the steady state voltage and frequency of the shutdown

(,

boards shall be maintained at 5000 1 00 and

. -50 i 1.2'Hz during this test. A z nav o 0a5nev velt:

E h 519 H, a-J A bl.2

5. Verifying that on a ESF actuation test signal, without loss of offsite power, the diesel generator starts on the auto-start signal and operates on standby for greater than or equal to 5 minutes. The generator voltage and frequency shall be z ermva~12 sM 4

-5000 e 590 Yelts and 50 t 1.2 Hz'within 10 seconds after the a_uto-start signalythe steady state generator voltage and

%,y / frequency shalT'be liaintainedpith!- these 'i;its'during this R41 test.

% a xv 4 m e M 2 rr. W us.t h

6. Simulating a loss.of offsite power in conjunction with an ESF actuation test signal, and a) Verifying de-enclization of the shutdown boards and load shedding from the shutdown boards.

b) Verifying the diesel starts on the auto-start signal, energizes the shutdown boards with pensanently connected loads within 10 seconds, energizes the auto-connected emergency (accident) loads through the load sequencers and operates for greater than or equal to 5 minutes while its generator is loaded with the emergency loads. After gue,., energization, the steady state voltage and frequency of (,

- the' mercy busses shall be maintained at 1000 i GO velts :nd 50 i 1.2 H? during this test. S umVWWW a~.A 2 s7,g hud s ci z h August 27, 1993

- D~adardlk GLl23,144.1603. 56,

ELECTRICAL POWER SisTEMS i

SURVEILLANCE REQUIREMENTS (Continued) c) Verifying that all automatic diesel generator trips, except engine overspeed and generator differential, are automati-cally bypassed-upon loss of voltage on the shutdown board

. and/or safety injection actuation signal.

EmcArGD To_$Q,3 4.7,t,6 2, g.To ,) af,y, l,1,2 3 t/

7. Ver ying the diesel ~ generator operates for at least 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . R164 During the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months to 2.25 hours2.893519e-4 days 0.00694 hours 4.133598e-5 weeks 9.5125e-6 months of this test, the diesel I generator shall be loaded between 4620 kw and 4840 kw and between 2380 kvar and 2600 kvar and during the remaining hours of this test, the diesel generator shall be loaded between 3960 kw and 4400 kw and between 2140 kvar and 2370 kvar.

fThegeneratorvoltageandfrequencyshallbe 6900

690 volts and RS6 60

1.2 Hz within 10 seconds after the start signal; the steady 1

state generator voltage and frequency shall be maintained within these limits during this test. Within 5 minutes after completing

[Qis 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months test, perform Specification 4.8.1.1.2.d.4.b.

8. Verifying that the auto-connected loads to each diesel generator RS6 do not exceed the continuous rating of 4400 kw.

9. Verifying the diesel generator's capability to: R41 a) Synchronize with the offsite power source while_the generator is loaded with its emergency loads upon a simulated restoration of offsite power.

b) Transfer its loads to the offsite power source, and c) Be restored to its shutdown status.

R41

10. Verifying that the automatic load sequence timers are OPERABLE with the setpoint for each sequence timer within

5 percent of '

its design setpoint.

11. Verifying that the following dies'el generator lockout features R41 prevent diesel generator starting only when required:

a) Engine overspeed b) 86 GA lockout relay

e. At least once per 10 years or after any modifications which could affect diesel generator interdependence by starting the diesel R186 generators simultaneously and verifying that each diesel generator achieves ia. less than or equal to 10 seconds,4900 : SO vol ti and 60 i.2 "e. 1 sta H <,

2CDaV e

February 1 1995 3/4 8-5 Amendmeat No. 41,51,123,164, 186 SEQUOYAH - UNIT 2

' ELECTRICAL POWER SYSTEMS SURVEILLANCE RE0VIREMENTS (Continued)

R2"O3

f. At least once per 10 years by: l

1. Draining.each fuel oil storage tank, removing the accumulated sediment and cleaning the tank using a sodium hypoclorite solution, and

2. Performing a pressure test of those portions of the diesel fuel oil system design to Section III, subsection ND of the ASME Code at a test pressure equal to 110 percent of the GerLsed system design pressure.

4.8. 1. The 125-volt D.C. distribution panel,125-volt D.C. battery bank and associated charger for each diesel generator shall be demonstrated OPERABLE:

a. At least once per 7 days by verifying:

1. That the parameters in Table 4.8-la meet the Category A limits.

2. That the'tucal battery terminal voltage is greater than or 'R8 equal to 124-volts on float charge.

b. At least once per 92 days by:

1. Verifying that the parameters in Table 4.8-la meet the Category B limits, _ ,

2. Verifying there is no visible corrosion at either terminals or connectors, or the cell to terminal connection resistance of these items is les's than 150 x 10 chas, and

3. Verifying that the average electrolyte temperature of 6 connected R2 3 cells is above 60*F.

c. At least once per 18 months by verifying that:

1. The cells, cell plates and battery racks sho.: no visual indication of physical damage or abnomal deterioration.

2. The battery to battery and terminal connections are clean, tight and coated with anti-corvosiog. material.

3. The resistance of each cell to terminal connection is less than or equal to 150 x }0 ohns.

R203 I

k October 4, 1995 Amendment No. 8, 203 SEQUOYAH - UNIT 2 3/4 8-6 l

- __w

Insert to page Unit 2 3/4 8-6

g. At least once per 18 months by:

1. Verifying the generator capability to reject a load of greater than or equal to 600 kw while maintaining voltage at within i R88 10 percent of the initial pretest voltage and frequency at 60 1 1.2 Hz. At no time shall the transient voltage exceed 8276V.

2 Verifying the generator capability to reject a load of 4400 kw h56 without tripping. The generator voltage shall not exceed 8880V lR160 during and following the load rejection.

3. Verifying the diesel generator cperates for at least 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . R164 During the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months to 2.25 hours2.893519e-4 days 0.00694 hours 4.133598e-5 weeks 9.5125e-6 months of this test, the diesel generator shall be loaded between 4620 kw and 4840 kw and between 2380 kvar and 2600 kvar and during the remaining hours of this test, the diesel generator shall be loaded between 3960 kw and 4400 kw and betseen 2140 kvar and 2370 kvar. ,

26uoMin 1He The generator voltage and frequency shall be C000 : 500 velt: ;GI R56 GC 1.2 "t within 10 seconds after the start signal.f$the steady ah 6 tam- state th ::generator voltage limit Gduring thisandtest.frequency "ithin Eshall be maintained

= %ute: :ft:r :cep'etiT withtW *Y' ADv 4 f M*d thi: 24-hour--tes,-per-foroSpeci ficetion # "N 253.fHe ed 6__oI4H2.

4. Within 5 minutes of shutting down the diesel generator after it has operated 2 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months loaded between 3960 kW and 4400 kW and between 2140 kVAR and 2370 kVAR verify that the diesel generator starts within 10 seconds after receipt of the start signal and operates for greater than or equal to 5-minutes. dhesteadystatevoltageand frequency shall be mainthined at C000 i COO ":1: 5 and 50 i' 1.2 9 during this test. 2 nau s mo v 2 5r.1 4 Alb -hahb 1

.3/4.8 ELECTRICAL POWER SYSTEMS BASES 3/4.8.1 and 3/4.8.2 A.C. SOURCES AND ONSITE POWER DISTRIBUTION SYSTEMS underground storage tank. Within practical limits, the chemical cleaning of an underground storage tank will be performed during a refueling or other R123 scheduled outage for the associated unit.

The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution systems during shutdown and refueling ensures that 1) the facility can be maintained in the shutdown or refueling condition for extended time periods and 2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.

The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regula+ory Guides 1.9 " Selection of Diesel Generator Set Capacity for Standby Power Sup-plies," March 10, 1971, and 1.108 " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1, August 1977, and 1.137 ". Fuel-Oil Systems for ..andby Diesel Generators," Revi-sion 1, October 1979. The surveillance requirements for the diesel generator R164 load-run test and the 24-hour endurance and margin test are in accordance with Regulatory Guide 1.9, Revision 3, July 1993, " Selection, Design, Qualification, and Testing of Emergency Diesel Generator Units Used as Class lE Onsite Elec-tric Power Systems at Nuclear Power Plants." During the diesel generator

('

endurance and margin surveillance test, momentary transients outside the kw and kvar load ranges do not invalidate the test results. Similarly, during the diesel generator load-run test, momentary transients outside the kw load range do not invalidate the test results.

Src %

r.wn The Surveillance Requirement for demonstrating the OPERABILITY of the Station batteries are based on the recommendations of Regulatory Guide 1.129

" Maintenance Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants," February 1978, and IEEE Std 450-1980, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations."

June 29, 1995 R195 SEQUOYAH - UNIT 2 B 3/4 8-la Amendment No. 123, 164, l 195

Insert to B 3/4 8-la Where the_SRs discussed herein specify voltage and frequency tolerances, the following is applicable. 6800 volts is the ,

minimum steady state output voltage and the 10 second transient

-value. 6800 volts is 98.6% of nominal bus voltage of 6900 V and is based on the minimum voltage required for the D/G supply a

breaker to close on the 6.9 kV shutdown board. The specified maximum steady state output voltage of 7260 V is based on the F

degraded over voltage reJay setpoint and is equivalent to 110% of the nameplate rating of the 6600 V motors. The specified minimum and maximum frequencies of the D/G are 58.8 Hz and 61.2 Hz,

4. respectively. These values are equal to i 2% of the 60 Hz nominal frequency and are derived from the recommendations given in Regulatory Guide 1.9.

1 t

a

ENCLOSURE 3 TENNESSEE VALLEY AUTHORITY dEQUOYAH NUCLEM. PIANT (SQN)

UNITS 1 and 2 PROPOSED TECHNICAL SPECIFICATION (TS) CHANGE TS-97-06 REVISED PAGES l

l I. AFFECTMD PAGF. LIST Unit 1 3/4 8-3 3/4 6-4 3/4 8-5 3/4 8-6 B3/4 8-la Unit 2 3/4 8-3 3/4 8-4 s 3/4 8-5 3/4 8-6 B3/4 8-la l

II. REVISED PAGES See attached.

J

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 4.8.1.1.2 Each diesel generator set shall be demonstrated Op3RABLE:

a. At least once per 31 days on a staggered test basis by: lR230

1. Verifying the fuel level in the engine-mounted day tanks.

2. Verifying the fuel level in the 7 day tank.

3. Verifying the fuel transfer pump can be started and transfers fuel from the storags system to the engine mounted fuel tanks.

4.

Verifying the diesei starts from ambient condition and achieves in less than or equal to 10 seconds voltage anG frequency of a 6000 volta and a 58.8 Hz and acheives a steady state voltage and frequency of a 6800 volta and s 7260 volts and a 58.8 Hz and

- s 61.2 Hz. The diesel generator shall be started for this test by using one of the following signals with startup on each signal verified at least once per 124 days: lRbb a) Manual, b) Simulated loss of offsite power by itself.

c) An ESP actuation test signal by itself.

5.

Verifying the generator is synchronized, loaded between 3960 kw R177 and 4400 kw in less than or equal to 60 seconds, and operates for greator than or equal to 60 minutes, and

6. Verifying the dieael generator is aligned to provide standtf power to the associated shutdown boards,

b. At least once per 31 days and after each operation of the diesel where the period of operation was greater than or equal to I hour by checking for and removing accumulated water from the engine-mounted fuel tanks.

c. At least once per 92 days and from new fuel oil prior to addition te the 7-day tanks by verifying that a sample obtained in accordance I

' with ASTM D270-1975 has a aater and sediment content of less than or equal to .05 volume percent and a kinematic viscosity @ 100*F of greater than or equal to 1.8 but less than r . equal to 5.0 centi-stokes when tested in accordanca with ASTM-D975-77, and an impurity level of less than 2 mg. of insolubles per 100 mA . when tested in accordance with ASTM-D2274-70.

The diesel generator start (10 see) and load (60 sec) from standby conditions shall be performed at least once per 184 d'ya in these surveillance tests. All other diese) generator engine starts and loading for the purpose of this RS6 surveillance testing may be preceded by an engine idle start, followed by gradual acceleration to synchronous speed (approximately 900 rpm),

synchronization, and gradual loading. In this latter case, 10 second requirementa do not apply.

SEQUOYAH - UNIT 1 3/4 8-3 Amendment Nos. 52, 64, 99, 109, 137, 173, 195, 226, J

_. - - .- - - _ - _ _ _ _ - _ - - - - - - - - _ . - . - _ ~ _ . _ _ _ . - . - - - - -

I v s

ELECTRICAL POWER SYSTEMS CURVEILLANCE REQUIREMINTD (Continued)

_____---m

d. At least once per 18 months during shutdowr. by:

1. This surveillance is deleted.

2. This surveillance has been relocated to GR 4.8.1.1.2.g.1. '

3. This surveillance has been relocated to SR 4.8.1.1.'e.g.2.

4. Simulating a loss of offsite power by itself, ands a) Verifying de energitation of the shutdown boards and load shedding from the shutdown boards, b) Verifying the diesel starts on the auto-start signal, energizes t he shutdown boards with permanently connected loads within 10 seconds, energizes the auto-connected shutdown loads through the load sequencers and operates for greater than or equal to 5 minutes while its generator is loaded with the shutdown loads. After energization, the steady state voltage and frequency of the shutdown boards shr"1 be maiatained at = 6A00 volts and a 7260 volts and a 58.8 Hz and s 61.2 Hz during this test.

5. Verifying that on a ESF actuation test signal (witho.t loss of offsite power) the diesel generator strrts on the auto-start signal and operates on standby for greater than or equal to 5 minutes. The generator voltage and frequency shall be a 6000 volts and a 58.8 Hz within 10 seconds after the Juto-start signal. After energitation, the steady state generator voltage and frequency shall be maintained e.t = 6000 volts and s 7260 volts and a 58.8 Hz cnd s 61.2 Hz during thic test.

6. Simulating a loss of offsite power in conjunction with an ESF R53 actuation test signal, and a) Verifying de-energization of the shutdown boards and load shedding from the shutdown boards, b) Verifying the diesel starts on the auto-start signal, R118 energizes the s>Tcdown boards with permanently connected loads within 10 seconds, energizes the auto connected emergency (accident) loads through the load sequencers and operates for greater than or equal to 5 minutes while its generator is loaded with the emergency loads. After energization, the steady state voltage and frequency of the shutdown boards shall be maintained at a 6800 volts and s 7260 volts and a 58.8 Hz and s 61.2 Hz during this test.

c) Verifying that all automatio diesel generator trips, wxcept engine overspeed and generator differential, are automatically bypassed upon loss of voltage on the shutdown board and/or safety injection actuation signal.

7. This surveillance has been relocated to SR 4.8.1.1.2.g.3 and SR 4.8.1.1.2.g.4.

I SEQUOYAH - UNIT 1 3/4 8-4 Amendment Nos. 49, 64, 114, 137, i 154, 170, 99, l

-. . - . - _ - ~ . - . - _ . _ - . - - _ . . - - . - . -. - .. . - ~

t LECTRICAL POWER BYSTEMS SURVkILLANCEREQUIREMENTS (Continued)

8. Verifying that the auto connected loads to each diesel generator R68 do not exceed the continuous rating of 4400 kW.

9. Verifying the diesel generator's capability to a) S yt .. 're with the offsite power source while the genera-tor .. aded with its emergency loads upon a simulated restorat'on of offsite power.

b) *fransfer its 1cada to the offsite power source, and c) Be restored to its shutdown status.

10 Verifying that the automatic load sequence timers ate OPERABLE with the setpoint for each sequence timer within i 5 percent of its design setpo!nt.

11. Verifying that the following diesel generator lockout features prevent diesel generator starting only when required:

a) Engine overspeed b) 86 GA lockout relay ,

e. At least once per 10 years or after any modifications which could e.cfect diesel generator interdependence by starting the diesel generators simultaneously and verifying that each diesel generator achieves in less than or equal to 10 seconds, a 6800 volts and a 58.8 Hz.

f. At least once per 10 years by:

lR217

1. Draining each fuel oil storage tank, removing the accumulated sediment and cleaning the tank using a sodium hypoclorite solution, and

2. Performing a pressure test of those portions of the diesel fuel oil system design to Section III, subsection ND of the ASME Code at a test pressure equal to 110 percent of the system design pressure.

l

g. At least once per 18 months by: l.

i

3. Verifying the generator capability to reject a load of greater than or equal to 600 kw while raaintaining voltage at within i 10 percent of the initial pretest voltage and frequency at 60 1 1.2 R103 Hz. At no time shall the transient voltage exceed 8276V.

.2. Verifying the generator capability to reject a load of 4400 kw lR68 without tripping. The generator voltage shall not exceed 8880V lR174 during and following the load rejection, i

i SEQUOY7H - UNIT 1 3/4 8-5 Amendment No. 52, 64, 99, 109,

j. 114, 137, 170, 173, 195, 213, 1

l

9 e

ELECTRICAL POWER SYSTEMS l

SURVEILIJNCE REQUIREMENTS (Continuad)

3. Verifying the diesel gene tor ooerates for-at least 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

During the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months to 2.25 hours2.893519e-4 days 0.00694 hours 4.133598e-5 weeks 9.5125e-6 months of this test, the diosel generator shall be loaded between 4620 kw and 4840 kw and R177 between 2380 kvar and 2600 kvar and during the remaining hours I of this test, the diesel generator shall be loaded between 3960 kw and 4400 kw and between 2140 kvar and 2370 kvar.

I The generator voltage and frequency shall be = 6000 volts and a 58.8 Hz within 10 seconds after the start signal. After energization, the steady state generator voltage and frquency shall be maintained a 6800 volts and s 7260 volts and a 58.8 Hz and s 61.2 Hz during this test.

4. Within 5 minutes of shutting down the diesel generator after it has operated a 2 hovra loaded between 3960 kw and 4400 kw and between 2140 kvar arid 2370 kvar, verify that the diesel generator starts within 10 seconds after receipt of the start signal and operatea for greater than or equal to 5 minutes.

Af ter energizatio'., the rteady state voltage and frequency shall be s

maintained a 6800 volts and a 7260 volts and = 58.8 Hz and 61.2 Hz d2 ring this test.

4.8.1.1.3 The 125-volt D.C. distribution panel, 125-volt D.C. battery bank and associated charger for each diesel generator shall be demonstrated OPERABLE:

a. At least once per 7 days by verifying:

1. That the parameters in Table 4.8-la meet the Category A limits.

2. That the total battery terminal voltage is greater than or equal to 124-volts on float charge,

b. At least once per 92 days by:

1. Verifying that the parameters in Table 4.8.la meet the Category B limits,

2. Verifying there is no visible corrosion at either terminals or connectors, or the cell to terminal connection resistance of these items is less than- 150 x lo

ohms, and

3. Varifying that the average electrolyte temperature of 6 connec8od cells is above 60*F. lR217

c. At least once per 18 months by verifying that:

1. The cells, cell plates and battery racks show no visual indication of physical damage or abnormal. deterioration.

2. The battery to battery and terminal connections are clean, tight and coated with anti-corrosion material.

3. The resistance of each cell to terminal connection is less than or equal to 150 x lo

ohms.

4 . 8.1.1. 4. Reports - All diesel generator failures, valid or non-valid, shall RS6 be reported to the Commission pursuant to Specification 6.S.2.2.

SEQUOYAH - UNIT 1 3/4 8-6 Amendmen*. Nos. 52, 137, 173, 213.

-I

. N

- _ _ _ _ - - _ - . . - _ _ - - ~ - - . _ - - . _ _ - - - - ~ _ _ . - _ _ _ - - -

3/4.8 ELECTRICAL POWER SYSTEMS BASES 3/4,8.1 and 3/4.8.2 A.C. SOURCES AND ONSITE POWER D?STRIBUTION SYSTEldS the yard storage tanks prior to the start of the chemical cleaning of any R141 underground storage tank. Within practical limits, the chemical cleaning of an underground storage tank will be petformed during a refueling or other scheduled outage for the associated unit.

The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution systems during shutdown and refueling ensures that 1) the facility can be maintained in the shutdown or refueling condition for extended time periods and 2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.

The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guides 1.9 " Selection of Diesel Generator Set Capacity for Standby Power Supplies," March 10, 1971, and 1.108 " Periodic Testing of Diesel Generator Unito Used as Onsite Electric Power Systems at Nuclear Power Plants,"

Revision 1, August 1977, and 1.137 " Fuel-Oil Systems for Standby Diesel Generators," Revision 1, October 1979. . The surveillance requirements for the diesel generator load run test and the 24-hour endurance and margin test are in accordance with Regulatory Guide 1,9, R(vision 3, July 1993, " Selection, Design, Qualification, and Testit.g of Emergency Ciesel Generator Units Used as R177 Class 1E Oncite Electric Power Systems at Nuclear Power Plants." During the diesel generator endurance and margin surveillance test, momentary transients outside the kw and kvar load ranges to not invalidate the test results.

Similarly, during the diesel generator load-run test, momentary transients outside the kw load range do not invalidate the test results.

Where the SRs discussed herein specify voltage and frequency tolerances, the following is applicable. 6000 volts is the minimum steady state output voltage and the 10 second transient value. 6000 volts is 98.6% of nominal bus voltage of 6900 volts and is based on the minimum voltage required fo the diesel generator supply breaker to close on the 6.9 kV shutdown board. The specified maximum steady state output voltage of 7260 volts is based on the degraded over voltage relay setpoint and is equivalent to 110% of the nameplate rating of the 6600 volt motors. The specified minimum and maximum frequencies of the diesel generator are 58.8 Hz and 61.2 Hz, respectively. These values are equal to i 2% of the 60 Hz nominal frequency and are derived from the recommendations given in regulatory Guide 1.9.

The Surveillance Requirement for demonstrating the OPERABILITY ci the Station batteries are based on the recommendations of Regulatory Guide 1.129

" Maintenance Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants," February 1978, and IEEE Std 450-1980, "IESE Recommended Practice for Maintenance, Testing, and Replacem mt of Large Lead Storage Batteries-for Generating Stations and Substations."

SEQUOYAH - UNIT 1 B 3/4 8-la Amendment Fo. 12, 137, 173 lR209 205,

e ELECTRICAL POWER BYSTEM9 SURVEILLANCE REQUIRLMEN*S (Continued) 4.8.1.1.2 Each diesel generator set shall be demonstrated OPERABLE:

a. At least onca per 31 days on a staggered test basis by: lR217

1. Verifying the fuel awyel in the engine-mounted day tanks.

2. Verifying the fuel level in the 7 day tank.

3. Verifying the fuel transfer pump starts and transfers fuel from the storage syctem to the engine mounted fuel tanks.

4.

Verifying the diesel starts from ambient condition and achieves in less than or equal to 10 seconds generator voltage and frequency of a 6000 volts and a 58.8 Hz and acheives a steady state voltage and frequency of a 6800 volts and s 7260 volta and a 58.8 Hz and s 61.2 Hz. The diesel generator shall be started for this test by using one of the following signals with startup on each signal verified at R99 least once per 124 days:

a) Manual.

b) Simulated loss of offsite power by itself.

c) An ESP actuation test signal by itself. R44

5.

Verifying the generator is synchronized, loaded between 3960 kw and 4400 kw in less than or equal to 60 seconds, and operates for greater than or equal to 60 minutes, and lR164

6. Verifying the diesel generator is aligned to provide standby I power to the associated shutdown boards,

b. At least once per 31 days and after each operation of the diesel where the period of operation was greater than or equal to 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months by checking for and removing ace umulated water f rom the engine-mounted fuel tanks,

c. At least once per 92 days and from new fuel oil prior to addition-to the 7-day tanks by verifying that a sample obtained in accordance with AS1N-D270-1975 has a water and sediment content of less than or equal to .05 volume percent and a kinematic viscosity

@ 100*F of greater than or equal to 1.8 but less than or equal to 5.0 centi-stokes when tested in accordance with ASTM-D975-77, and an impurity level of less than 2 f.g. of insolubles per 100 ml when cested in accordance with ASTM-D2274-70.

The diesel gnaerator start (10 see; and load (60 sec) from standby cenditions shall be performed at least once per 184 days in these surveillance tests. All R44 other diesel generator engine starts and loading for the purpose of this surveillance testing may be preceded by an engine idle start, followed by gradual acceleration to synchronous speed (approximately 900 rpm),

synchronization, and gradual loading. In this latter case, 10 second requirements do not apply.

SEQUOYAH - UNIT 2 3/4 8-3 Amendment Nos. 44, 56, 88, 99, 113, 164, 1R6, 217.

I

e d

+

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

d. At least once per 18 months during shutdown by:

1. This surveillance is deleted.

2. This surveillance has been relocated to SR 4.8.1.1.2.g.1.

3. This surveillance has been relocated to SR 4.8.1.1.2.g.2.

4. Simulating a loss of offsite power by itself, ands a) Verifying de-energization of the shutdown boards and' load shedding from the shutdown boards.

( b) Verifying the diesel starte on the auto-start signal, energizes the shutdown boards with permanently connected loads within 10 seconds, energizes the auto-connected shutdown loads through the load sequencers and operates for greater than or equal to 5 minutes while its generator is loaded with the shutdown loads.

After energization, the steady state voltage and frequency of the abutdown boards shall be maintained at a 6800 volts and s 7260 volta and a 58.8 Hz and a 61.2 Hz during this test.

} 5. Verifying that on a ESF actuation test signal, without loss of offsite power, the diesel generator starts on the auto-start signal and cperates on standby for greater than or equal to 5 minutes. The generator voltage and frequency sFall be a 6800 volts and a 58.8 Hz within 10 seconds after the auto-start signal. After energization, the steady state generator voltage and frequency shall be maintained at a 6800 volts and a 7260 volta and a 58.8 Hz and s 61.2 Hz during this test.

6. Siniulating a loss of of fsite power in conjunction with an ESF R41 actuation test signal, and a) Verifying de-energization of the shutdown boards and load shedding from the shutdown boards, b) Verifying the diesel starts on the auto-start signal, energizes the shutdown boards with permanently connected loads within 10 seconds, energizes the auto-connected emergency (accident) loads through the load sequencers and operates for greater than or equal to 5 minutes while its generator is loaded with the emergency loads. After energitation, the steady state voltage and frequency of the shutdown boar'.s shall be maartained at a 6800 volta and s 7260 volts and a 58.8 Hz and s 61.2 Fz during this test.

c) Verifying that all automatic diesel generator trips, except engine overspeed and generator differential, are automatically bypassed upon loss of voltage on the shutdown board and/or safety injection actuation signal.

7 This surveillance has been relocated to SR 4.8.1.1.2.g.3 and SR 4.8.1.1.2.g.4.

SEQUOYAH - UNIT 2 3/4 8-4 Amendment Nos. 41, 56, 88, 123, 144, 160,

_ _ g __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ - - - -

o e'

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

I 1

8 Verifying that the auto connected loads to each diesel R$6 generator do not exceed the continuous rating of 4400 kw.

9. Verifying the diesel generator's capability tos lR41 a) Synchronize with the offsite power source while the

, generator is loaded with its emergency loads upon a simulated restoration of offsite power.

b) Transfer its loads to the offsita power source, and c) De restored to its shutdown status.

10. Verifying that the automatic load sequence timers are i OPERABLE with the setpoint for each sequence timer within n41 15 percent of 4.ts design setpoint.

11. Verifying that the following diesel generator lockout features prevent diesel generLtor starting only when R41 required:

a) Engine overspeed b) 86 GA lockout relay

e. At least once per 10 years or af ter any nodifications which could affect diesel generator interdependence by starting the diesel generators simultaneously and verifying that each diesel generator achieves in less than or equal to lo seconds, a 6000 volts and a 58.8 Hz.

f. At least once per 10 years by: lR203

1. Draining each fuel oil storage tank, removing the accumu?ated sediment and cleaning the tank using a rodium hypoclorite solution, and

2. Performing a pressure test of those portions of the diesel fuel oil system designed to Section III, subsection iTD of the AFME Code at a test pressure equal to 110 percent of the system design pressure,

g. At least once per 10 months by: l

1. Verifying the generator capability to reject a load of greater than or equal to 600 kw while maintaining voltage at R88 within i 10 percent of the initial pretest voltage and frequency at 60 1 1.2 Hz. At no time shall the transient voltage exceed 8276V.

2. Verifying the gsaerator capability to reject a load of RS6 4400 kw without tripping. The generator voltage shall not exceed 8880V during and following the load rejection. lR160 SEQUOYAH - UNIT 2 3/4 8-5 AmeddmentNom. 41, 56, 88, 123, 160, 164, 186, 203, 1

I

( ,

or v

, e' ELECTRICAL POWER SYSTgda i SURVEILLANCE REQUIREMENTS (Cont inued)

3. Verifying the diesel generator operates for at least 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . During the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months to 2.25 hours2.893519e-4 days 0.00694 hours 4.133598e-5 weeks 9.5125e-6 months of this test, the diosel generator shall be loaded between 4620 kw R164 and 4840 kw sand between 2300 kvar and 2600 kvar and during the remaining hours of this test, the diesel generator shall be loaded be, tween 3940 kw and 4400 kw and between 2140 kvar and 2370 kvar.

The genera'cor voltage and frequency shall be a 6800 volts and a 58.8 Hz within 10 seconds after the start signal. After energitation, the steady state generator voltage and frquency shall be maintained a 6800 volts and s 7260 voitu and a 58.8 Hz and a 61.2 Hz during this test.

4. Within 5 minutes of shutting down the diesel generator after it has operated a 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months loaded between 3960 kw and 4400 kw and between 2140 kvar and 2370 kvar, verify that the diesel generator starts within 10 seconds after receipt of the start signal and operates for greater than or equal to 5 minutes.

After energization, the steady state voltage and frequency shall be maintained a 6800 volta and s 7260 volta and a 58.8 Hz and s 61.2 Hz during this test.

4.8.1.1.3 The 125-volt D.C. distribution panel, 125-volt P.C. battery bank and associated charger for each diesel generator shall be demonstrated OPERABLE:

a. At least once per 7 days by verifying:

1.

hat the parameters in Table 4.8-la meet the category A limits.

2. That the total battery terminal volta'eg is greater than or R8 equal to 124 volts on float. charge.

b. At least once per 92 days by:

1. Verifying that the parameters in Table 4.8-la meet the Category B limits,

2. Verifying there is no visible corrosion at either tsrminals or connectors, or the ce13 to terminal connection resistance of these items is less than 150 x 104 ohms, and

3. Verifying that the average electrolyte temperature of 6 connected cells is above 60*P. lR203

c. At least once per 18 months by verifying that:

1. The cells, cell plates and battery racks show no visual indication of physical damage or abnormal deterioration.

2. The battery to battery and terminal connections are clean, tight and coated with anti-corrosion material.

3. The resistance of each cell to terminal connection is less than er equal to 150 x 104 ohms.

R203

-SEQUOYAH - UNIT 2 3/4 8-6 Amendment No. 8, 56, 164, 203,

~.. i

,s*

3/4.8 ELECTRICAL POWER SYSTEMS uASES 3/4 B.1 AND 3/4.8.2 A.C. GOURCES AND ONSITE POWER DISTRIDUTION SYSTEMS underground storage tank. Within practical limits, the chemical cleaning of an underground storage tank will be performed during a refueling or other R123 scheduled outage for the associated unit.

ThJ OPERADILITY of the minimum specified A.C. and D.C. power sources and associated distribution systema during shutdown and refueling ensuren that

1) the facility can be maintained in the shutdown or refueling condition for extended time periods and 2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.

The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guides 1.9 " Selection of Diesel Generator Set Capacity for Standby Power Supplies", March 10, 1971, 1.108 " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plantb," Revision 1, August 1977, and 1.137 " Fuel-Oil Systema for Standby Diesel Generators,"

Revision 1, Octcber 1979. The surveillane requirements for the diesel generator load-run test and the 24-hour endurance and margin test are in accordanca with Regulatory Guide 1.9, Revision 3, July 1993, " Selection, Design, Qualification, and 'aesting of Emergency Dicael Generator Units Used as Class 1E Onsite Electric Power Systems at Nuclear Power Plant." During the R164 diesel generator endurance and margin surveillance test, momentary transients outside the kw and kvar load ranges do not invalidate the test results.

Similarly, during the diesel generator load-run test, momentary transients outside the kw load range do not invalidate the test results.

Where the SRs discussed herJin specify voltage and frequency tolerances, the following is applicable. 6800 volts is the minimum steady state output I i voltage and ths 10 second transient value. 6800 volts is 98.6% of nominal bus voltage of'69Ce volta and is based on the minimum voltage required for the diesel generatsar supply breaker to close on the 6.9 kV shutdown board. The specified maximum steady state output voltage of 7260 volts is based on the degraded over voltage relay setpoint and 19 equivalent to 110% of the nameplate rating of the 6600 volt motors. The specified minimum and maximum frequencies of the diesel generator are 58.8 Hz and 61.2 Hz, respectively. These values are equal to i 2% of the 60 Hz nominal frequency and are derived from the recommendations given in regulatory Guide 1.9.

The Surveillance Requirement for demonstrating the OPERABILITY of the Station batteries are are based on the recommendations of Regulatory Guide 1.129 " Maintenance Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants," February 1978, and IEEE Std 450-1980, "IEEE Recommended Practic. for Maintenance, Testing and Replacement of barge Lead Storage Batteries ;,r Generating Stations and Substations."

SEQUOYAH - UNIT 2 B 3/4 8-la Amendment No. 123, 164, 195, lR195

{

~- m- - r- v-n -r-m. ,

ML20203J168

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