Text

Proposed Tech Specs Requesting That Proposed Changes That Added 6.8.4.h,Actions G,H & I Be Deleted & Portion of Change Affecting EDG Fuel Oil Be Withdrawn
	ML20135B844
Person / Time
Site:	Waterford
Issue date:	02/27/1997
From:	; ENTERGY OPERATIONS, INC.
To:	;
Shared Package
ML20135B842	List: ML20135B839; ML20135B844;
References
	NUDOCS 9703030231
	Download: ML20135B844 (29)
	v • d • e

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i W3F1-97-0035 l

' ATTACHMENT A l i

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9703030231 970227 PDR ADOCK 05000382 p PDR

. . 3/4.8 ELECTRICAL POWER SYSTEMS 3/4.8.1 A.C. SOURCES OPERATING LIMITING CONDITION FOR OPERATION 3.8.1.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:

a. Two physically independent circuits between the offsite transmission network and the onsite Class 1E distribution system, and

b. Two separate and independent diesel generators, each with:

1. Diesel oil feed tanks containing a minimum volume of 339 gallons of fuel, and

2. A separate diesel generator fuel oil storage tank containing:

a. A minimum volume of 38,760 gallons of fuel, or

b. A fuel oil volume less than 38,760 gallons and graater than 38,000 gallons of fuel for a period not to exceed 5 days (provided replacement fuel oil is onsite within the first 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months ), and

3. A separate fuel transfer pump.

APPLICABILITY: MODES 1,2,3, and 4.

ACTION:

a. With one offsite circuit of 3.8.1.1a inoperable, demonstrate the OPERABILITY of the remaining offsite A.C. circuit by performing Surveillance Requirement 4.8.1.1.1a i within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter. " e!!her diece! generator has not -

been succe=fu!!y tect-d v?Nn the-p=* 24 hou , de "Onstrate it: OPERAS 4LITV-by pe:40~"ing Sur/0!'! nc^ R quire "--* 4.8.1 1.2&4 separate!y for ecch d!=e! generator (un!:= !! !: O! ready Op rating) v% 24 heu~;. Restore the offsite A.C. circuit to ;

OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . l

b. With one diesel generator of 3.8.1.1b inoperable, demonstrate the OPERABILITY of the offsite A.C. circuits by performing Surveillance Requirement 4.8.1.1.1a (separately l for each offsite A.C. circuit) within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter. If the diesel generator became inoperable due to any cause other than an inoperable support I system. an independently testable component, or preplanned preventive maintenance or testing, demonstrate the OPERABILITY of the remaining OPERABLE diesel generator (unless it has been successfully tested in the last 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months ) by' performing Surveillance Requirement 4.8.1.1.2a.4 within 24.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months unless the absence of any potential common mode failure for the remainino diesel oenerator is demonstrated. Restore the diesel generator to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within i the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

c. With one offsite A.C. circuit and one diesel Generator of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining offsite A.C. circuit by performing Surveillance Requirement 4.8.1.1.1a within 1 )

hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; and, if the diesel generator became inoperable due to any cause other than an inoperable support system. an independently testable component, or preplanned preventive maintenance or testing, demonstrate the OPERABILITY of the remaining OPERABLE diesel generator by performing Surveillance i Requirement 4.8.1.1.2a.4 within 8 WATERFORD - UNIT 3 3/4 6-1 AMENDMENT NO. 23,92

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l ELECTRICAL POWER SYSTEMS ACTION (Continued) hours (unless it is already operating) unless the absence of any Dotential common mode failure for the remainino diesel oenerator is demonstrated. Restore at least one of the inoperable sources to OPERABLE status within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . Restore the other A.C. power source (offsite A.C. circuit or diesel generator) to OPERABLE status in accordance with the provisions of ACTION statement a or b, as appropriate, with the time requirement of that ACTION statement based on the time of initial loss of the

, remaining inoperable A.C. power source. A successful test of diesel generator OPERABILITY per Surveillance Requirement 4.8.1.1.2a.4 performed under this ACTION statement satisfies the diesel generator test requirement of ACTION statement a or b.

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d. With one diesel generator inoperabid, in addition to ACTION b. or c. above, I verify that:

(1) All required systems, subsystems, trains, components, and devices that depend on the remaining OPERABLE diesel generator as a source of emergency 4

power are also OPERABLE, and

(2) When in MODE 1,2, or 3, the steam-driven emergency feed pump is !

a OPERABLE.

l If these conditions are not satisfied within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

e. With two of the above required offsite A.C. circuits inoperable, demenmete the

.. . . ._ . . . .. .... _!!!!! ;enertem by p-de'-"ng Surce!!!cnce R-';e!rement 1.8.4.1.20.1 reprm' !y for erch fr:r!;en rater v.9 S heem en!::: the ferr' generatem em :! reedy !?rreting; restore one of the inoperable o;faite A.C. circuits to OPERABLE status within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . Following restoration of one offsite A.C. circuit, follow ACTION statement a with the time requirement of that ACTION statement based on the time of initial loss of the l remaining inoperable offsite A.C. circuit. A successful test of diesel generator !

OPERABILITY per Surveillance Requirement 4.8.1.1.2a.4 performed under this ACTION i statement satisfies the diesel generator test requirement of ACTION statement a. i

f. With two of the above required diesel generators inoperable, demonstrate the ,

OPERABILITY of two offsite A.C. circuits by performing Surveillance Requirement !

4.8.1.1.ia within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; restore one of the ;

inoperable diesel generators to OPERABLE status within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or be in at least HOT l STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . Following restoration of one diesel generator, follow ACTION statement b with the time requirement of that ACTION staiement based on the time of initialloss of the remaining inoperable diesel generator.

WATERFORD - UNIT 3 3/4 8-2 AMENDMENT NO. 23

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

[ ELECTRICAL POWER SYSTEM SURVetLLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and l.

the onsite Class 1E distribution system shall be:

a. Determined OPERABLE at least once per 7 days by verifying correct breaker alignments, indicated power availability, and i

j b. Demonstrated OPERABLE at least once per 18 months by transfening manually and l

automatically unit power supply from the normal circuit to the alternate circuit.

4.8.1.1.2 Each diesel generator shall be demonstrated OPERABLE *

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! a. At least once per 31 davs in-aesonnance "? the ':: ,2:ncy 5-;::"": d h Tf':

444 on a STAGGERED TEST BASIS by:

{ 1. Verifying the fuel level in the diesel oil feed tank, l 2, Verifying the fuel level in the diesel generator fuel oil storage tank, 1

! 3. Verifyin0 the fuel transfer pump can be started and transfers fuel from

,_ the storage system to the diesel oil feed tank, .

l -l 1 4. Verifying the diesel starts N?"' ;-

3 (40-11.2 H:) 5 ' : S::: em ' to 10 :::: .d:". The generator voltage and j frequency shall be pt least 3920'1SO ^ 120,- 240 volts and gjeo-i44 Hz within

! irts 10 seconds after the start si0nal". The steady state voltaae and freauency

shall be maintained at 4160 + 420. -240 volts and 60

1.2 Hz. The diesel generator shall be started for this test by using one of the following signals: 3 1

a) Manual.

b) Simulated loss-of-offsite power by itself.

c) Simulated loss-of-offsite power in conjunction with an ESF :

actuation test signal.

i d) An ESF actuation test signal by itself.

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All planned starts for the purpose of surveillance in this section may be preceded by a prelube period as recommended by the manufacturer.

"A modified diesel oenerator start involvino idlino and oradual acceleration to synchronous speed may be l used for this surveillance roouirement as recommended by the manufacturer. When modified start Drocedures are not used. the time. speed. voltane. and freauency tolerances of this surveillance reouirement must be met.

WATERFORD - UNIT 3 3/4 8-3 AMENDMENT NO. 33, 74

f l t j, ELECTRICAL POWER SYJIgMS

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SURVEILLANCE REQUIREMENTS (Continesd) j l

5. Verifying the generatoris synchronized (1S : : t},-^ :;::::, !

i. loaded to an indicated Aggg4200-4400 Kw'in accordance with the I manufacturer's recommendation ?::: th:2 ^'--" ' t *?S ::::22,** and !'

] operates for at least an additional 60 minutes, and

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

power to the associated emergency busses. l 1

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7. At least once per 184 davs a diesel oenerator fast start test shall be oerofrmed in ' !

accordence with TS 4.8.1.1.2a.4. Performance of the 184 day fast start test I satisfies the 31 day testino roouirements specified in TS 4.8.1.1.2a.4.

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 diesel oil feed tanks.

c. At least once per 92 days and from new fuel oil prior to addition to the storage tanks, by obtaining a sample of fuel oil in accordance with ASTM-D270-1975, and by verifying that the sample meets the fo810 wing minimum requirements and is tested within the specified time limits:

1. As soon as sample is taken (or prior to adding new fuel to the storage tank) verify in accordance with the test specified in ASTM-D975-77 that the sample has:

a) A water and sediment content of less or equal to 0.05 volume percent.

b) A kinematic viscosity @ 40*C of greater than or equal to 1.9 centistokes, but less than or equal to 4.1 centistokes.

c) A specific gravity as specified by the manufacturer @ 60/60 F of greater than or equel to 0.85 but less than or equal to 0.99 or an API gravity G 60*F of greater than or equal to 11 degrees but less than or equal to 35 degrees.

2. Verify an impurity level of less than 2 mg of insolubles per 100 ml when tested in accordance with ASTM-D2274-70; analysis shall be completed within 7 days after obtaining the sample but may be performed after the addition of new fuel oil; and

This band is meant as guidance to avoid routine overloading of the engine. Loads in excess of this band

- for special testing under direct monitoring of the manufacturer or momentary variation due to changing bus loads shall not invalidate the test.

4ho f:::: ;;;;:2:: fast-load: ; -~i:- :d (1?S r} 2:!! 50 ;; ';n;d d !::-' 0= p-'1M d:p 4h*4esel-genosater-at44 ate 4ensestent WATERFORD - UNIT 3 3/4 8-4 AMENDMENT NO. 44, 23.23,92 l ;

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_ ELECTRICAL POWER SYSTEMS 'l j ' SURVEILLANCE REQUIREMENTS (Continued) l 3. Verify the other properties specified in Table 1 of ASTM-D975-1977 and Regulatory Guide 1.137, Revision 1, October 1979, Position 2.a., when tested in

. accordance with ASTM-D975-1977; analysis shall be completed within 14 days i after obtaining the sample but may be performed after the addition of new fuel l oil. Failure to meet this requirement shall not affect diesel gennator

OPERABILITY; however, corrective action shall be initiated wd'.n 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months to i retum the fuel oil supply to within acceptable limits.

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

1. Verifying the generator capability to reject a load of greater than or i equal to 498 kW N while maintaining voltage at 4160 + 420,-240 volts l l and frequency at 60 +4.5,-1.2 Hz.

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2. Verifying the generator capability to reject a load of an indicated 4.QQQ-4400 kw l l without tripping. The generator voltage shall not exceed 5023 volts during and following the load rejection.

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

a) Verifying deenergization of the emergency busses and load shedding from the emergency busses.44EE-NOT4i l b) Verifying the diesel starts on the auto-start signal, energizes the emergency busseswith and the permanently connected loads within l 10 seconds after the auto-start signal, energizes the auto-connected

' shutdown loads through the load sequencer and operates for greater than l or equal to 5 minutes while its generator is loaded with the shutdown loads. After energization, the steaciy-state voltage and frequency of the emergency busses shall be maintained at 4160 + 420,-240 volts and 60 +

1.2, -0.3 Hz during this test.

l 4SEE-MOTE 1

4. Verifying that on an S!AS 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 steady-state generator voltage and frequency shall be 4160 + 420,-240 volts and 60 i 1.2 Hz within 10 seconds after the auto-start signal; the generator voltage and frequer cy shall be maintained within these limits during this test.

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WATERFORD - UNIT 3 3/4 8-5 AMENDMENT NO. 4fl3 7743 484f23-74 44, 983 l l

l ELECTRICAL POWER SYSTEMS i @URVElLLANCE REQUIREMENTS (Continued) a

5. Simulating a loss-of-offsite power in conjunction with an SIAS actuation j test signal, and a) ' Verifying doenergization of the emergency busses and load shedding from the emergency busses.44EE449TE l b) Verifying the diesel starts on the auto-start signal, energizes !

j the emergency busseswith and the permanently connected loads within l j 10 seconds after the auto-start signal, energizes the auto-connected i emergency loads through the load sequencer and operates for greater than or equal to 5 minutes. After energization, the steady-state voltage I

and frequency of the emergency busses shall be maintained at 4160 +

420,-240 volts and 60 + 1.2, -0.3 Hz during this test.44EE44GTE l c) Verifying that all automatic diesel generator trips, except engine overspeed and generator differential, are automatically bypassed upon loss of voltage on the emergency bus concurrent with a safety injection actuation signal.

6. Verifying the diesel generator operates for at4 east- an interval of not less than 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . During t' "! ' 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of this test, the diesel generator shall be loaded to an indicated 4700 to 4900 Kw' and during

xz:M ;; 22 hours2.546296e-4 days 0.00611 hours 3.637566e-5 weeks 8.371e-6 months of this test, the diesel generator shall be loaded to an indicated 49994300 to 4400 Kw? The generator voltage and frequency shall be 4160 + 420,-240 volts and 60 1.2 Hz within 10 seconds after the start signal; the steady-state generator voltage and frequency shall be 4160 i 420 volts and 60 + 1.2, -0.3 Hz during this test. Within 5 minutes after completing this 24-hour test, perform Surveillance Requirement 4.8.1.1.2.a.4 4.S.! !.2.d.35."

7. Verifying that the auto-connected loads and DermanentlV Connected loads to each l diesel generator do not exceed the 2000-hour rating of 4400 kW.

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4eeestablowe4aalvsis

This band is meant as guidance to avoid routine overloading of the engine. Loads in excess of this band for special testing under direct monitoring of the manufacturer or momentary variation due to changing bus loads shall not invalidate the test.

"If Surveillance Requirement 4.8.1.1.2.a.4 4.S.* 1.2d.36 is not satisfactorily completed, it is not l necessary to repeat the preceding 24-hour test, instead, the diesel generator may be operated at an 1 Indicated _499Q 4300-4400 kw* for 2_4_ hours or until Intemal operating temperatures have stabilized. l WATERFORD - UNIT 3 3/4 6-6 AMENDMENT NO. 4,23,7' 4,23,74, l 98

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ELECTRICAL POWER SYSTEMS ,

SURVEILLANCE REQUIREMENTS (Continued) ,

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8. Verifying the diesel generators capability to:

a) Synchronize with the offsite power source while the generator ;

is loaded with its emergency loads upon a simulated restoration of offsite ;

. power, :

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. b) Transfer its loads to the offsite power source, and ;

c) Be restored to its standby status. >

1 i 9. Verifying that with the diesel generator operating in a test mode (connected to its bus), a simulated safety injection signal overrides the test mode by (1) retuming the diesel generator to standby operation and (2) automatically energizes the emergency loads with offsite power.

10. Verifying that each fuel transfer pump transfers fuel to its associated diesel oil feed tank by taking suction from the opposite train fuel oil storage tank via the installed cross connect.

11. Verifying that the automatic load sequence timer is OPERABLE with the

. time of each load block within i 10% of the sequenced load block time.

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

i a) tuming gear engaged b) emergency stop

, c) loss of D.C. control power i d) govemor fuel oillinkage tripped

e. At the first refueling outage, and thereafter, at intervals not to exceed 24 l months, subject the diesels to an inspection in accordance with procedures prepared in conjunction with its manufacturers recommendations for this class of standby service.

' f. At least once per 10 years or after any modifications which could affect diesel generator interdependence by starting the diesel generators simultaneously, during i shutdown, and verifying that the diesel generators accelerate to at least 600 rpm (60 *i l

' 1.2 Hz) in less than or equal to 10 seconds.

g. At least once per 10 years by:

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1. Draining each diesel generator fuel oil storage tank, removing the 1

accumulated sediment, and cleaning the tank using a sodium hypochlorite ;

! solution or equivalent,-andor an aooropriate mechanical method (such as pressure washino or manual wipinal.

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4 WATERFORD - UNIT 3 3/4 8-6a AMENDMENT NO. 2323, 92 l 1

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ELECTRICAL POWER SYSTEMS l SURVEILLANCE REQUIREMENTS (Continued) j

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h. By performing a visual inspection of the interior of the diesel generator fuel oil storage tanks each time the tank is drained and, if necessary, clean the tank with a sodium hypochlorite solution, or equivalent. or with an approDriate mechanical method j (such as pressure washina or manual wiDinal l 1

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4

ELECTRICAL POWER SYSTEMS I l

BASES i

A.C. SOURCES. D.C. SOURCES. AND ONSITE POWER DISTRIBUTION SYSTEMS (Continued)

The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are !

consistent in acccdence with the recommendations of Regulatory Guides 1.9 " Selection of Diesel Generator Set l Capacity for Standby Power Supplies," March 10,1971, and 1.108 " Periodic Testing of Diesel Generator Units i Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1, August 1977, and 1.137, " Fuel Oil i Systems for Standby Diesel Generators," Revision 1, October 1979. OtherThe_ provisions are derived from Generic Letter 93-05 "Line-! tem Technical Specifications Improvements to Reduce Surveillance Reauirements for Testina Durina Power Operation" 94-01 " Removal of Accelerated Testina and Special Reportina Reauirements for Ememency Diesel Generators." and NUREG 1432 Standard Technical Specifications Combustion Enaineerina Plants O!!Oveing die =! generator stadt ut!!!!!ng manufadurem' recommended pre!ube and/or viermup precedure, ine'uding !Onger stedng and ! ceding ped 0dt, !: to minim!ze dre= and v/e r on the die:0! engine and ! !n acccdence *5 Genede Letter 9415 conc ^ ming O!e=! Generater Re!! 52!!!y and Station B!acheut. F :t stads-from ambient coadit!cn {inc'ude !ubdcating and ivea".up eyctem Operating vhi!e !n

)'

standby !!neup) at !enst Onca eve y 184 day: !:in acccdence v'!!h RPAB PA analyc!: Of thi: curie!!! nce, The minimum voltaae and freauency stated in the Surveillance Reauirement are those necessary to ensure the diesel aenerator can accept the Desian Basis Accident loadina while maintainina acceptable voltaae and freauency levels. Stable operation at the nominal voltaae and freauency values is also essential to l

, establishina diesel aenerator OPERABILITY. but a time constraint is not imposed. This is because a typical diesel '

cenerator will experience a period of voltaae and freauency oscillations prior to reachina steady state operation if I these oscillations are not dampened out by load application. This period may extend beyond the 10 second acceptance criteria and could be a cause for failina the Surveillance Reauirement. In lieu of a time constraint in the Surveillance Reauirement. the actual time to reach steady state operation is monitored and trended. This is to I ensure there is no voltaae reaulator or covemor dearadation which could cause a diesel aenerator to become inoperable. The 10 seconds in the Surveillance Reauirement is met when the diesel aenerator first reaches the specified voltaae and frecuency. at which time the output breaker would close if an automatic actuation had occurred. I The diesel generator Surveillance testing performed once per 18 months during shutdown is in accordance with Regulatory Guide 1.108, Regulatory Position C.2.

1 The maximum voltage limit in survei!!ance test 4.8.1.1.2.d.2 was increased to 5023 volts !n response to NRC Information Notice 91-13; Inadequate Testing of Emergency Diesel Generators. A maximum voltage limit is provided to ensure that components electrically connected to the diesel generator are not damaged as a result of the momentary voltage excursion experienced during this test.

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."

Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage on float charge, connection resistance values and the performance of battery service and discharge tests ensures the effectiveness of the charging system, the ability to handle high discharge rates and compares the battery capacity at that time with the rated capacity.

Table 4.8-2 specifies the normal limits for each designated pilot cell and each connected cell for electrolyte level, float voltage, and specific gravity. The limits for the designated pilot cells float voltage and specific gravity, greater than 2.13 volts and 0.015 below the manufacturer's full charge specific gravity or a battery charger current that had stabilized at a low value, is characteristic of a charged cell with adequate capacity. The normal limits for each connected cell for float voltage and specific gravity, greater than 2.13 volts and not more than 0.020 below the manufacturer's full charge specific gravity with an average specific gravity of all the connected cells not more than 0.010 below the manufacturer's full charge specific gravity, ensures the OPERABILITY and capability of the battery.

WATERFORD - UNIT 3 8 3/4 8-2 AMENDMENT NO.,88-92 l

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2 l ELECTRICAL POWER SYSTEMS l BASES i

A.C. SOURCES. D.C. SOURCES. AND ONSITE POWER DISTRIBUTION SYSTEMS (Continued) l

! The Onsite Power System includes three 4.16 kV ESF 53=== (3A3-S. 3B3-S. and 3AB3-S).

l Power for safety related loads is normally ="aaN by the non-safety rala'ad 4.16 kV bJaas (SA2 and i

382) of the Offsite Power System. Should offsite power from either of these b3=== be lost. the i Onsite Power System will receive power automatically from the eaaropriate d!aaa! nonerator. Non-safety related loads will be automatically disconnected from the safety Onsite Power System. Each 1- ESF bus (3AS-S or SB3-S) is redundant to the other each can =9aalv sufficient power to its safety related loads to enable safe shutdown. or to mitia=*a the cori==anances of a d==lan h==le erWdant.

The third bus. 3AB3-S. may be connected to either 3AS-S or 3BS-S. but never to both. Therefore i 3AB3-S is not considered as a third. separate source of ESF power. The three ESF bJeas and their f loads are tested as described below.

Surveillance reauirements 4.8.1.1.2.d.3 and 4.8.1.1.2.d.5 are the intearated ta=*ino J reouirements that demonstrate the as desianed operation of the standby A.C. oower sources durina

! loss of the offsite power source and durino a loss of offsite power in coniunction with a Safety

} Iniection Actuation Sional(SIAS).-

, The testina verifies all actions encountered from the loss-of-offsite power (LOOP). includina i

sheddino of the nonessential loads and the e66isu;6G of the ememency bJa=as and ra=aar*!ve loads

j. from the diesel Generator. It further demonstrates the capability of the diesel oenerators to

automatically achieve the reouired voltaae and freauency within the specified time.

f The reauirement to verify the connection and enemization of permanentiv connected loads j and auto-connected loads is intended to satisfactorily show the relationship of these loads to the i diesel generators loadina lonic Permanentiv connected loads are those loads that remain connected

{ to the bus upon the bus d;;aerGMirai and are subseauentiv eneroized by the diesel oenerators. Auto

} connected loads are those loads that are disconnected from the bus upon the bus d;;asiskins and are auto-connected throuah the automatic load seauencer. Surveillance 4.8.1.1.2.d.3b verifies the i diesel nonerators capability to enemize the shutdown loads and surveillance 4.8.1.1.2.d.5b verifies the diesel oenerators capability to enemize the emernency loads. Shutdown loads are those loads t reauired upon a LOOP (Re: FSAR Table 8.3.11. Ememency loads are those loads reauired upon a

} LOOP in coniunction with an SIAS. This testino verifies that in the event of a Desian Bases Accident

! (DBA) coincident with a loss of offsite power. the diesel oenerators are capable of supolvino the

, necessary power to Enoineered Safety Features (ESF) systems so that the fuel. Reactor Coolant

! System (RCS). and containment desian limits are not exceeded.

Surveillance reauirement 4.8.1.1.2d.1 reouires the verification at least once per 18 months of

[

the diesel Generators' ability to relect a load of areater than or eaual to 498 Kw while specific voltaae and freauency constraints are maintained. The intent of this Surveillance reouirement is to reauire l- the diesel oenerator to reiect the lamest sinole load. The laroest sinale load on the diesel oenerator ,

! is the Essential Chiller which reouires 430 Kw under tomado/ missile conditions. The difference j i betwe;n the specified 498 Kw load in the Surveillance reouirement and the 430 Kw reauired by the

} actual lamest sinole load is a mamin of conservatism. A method of reiectina a load areater than or

eaual to 498 Kw utilizino the wet and dry coolina tower fans has been developed and will satisfy the j Surveillance reauirement.

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I WATERFORD - UNIT 3 B 3/4 6-2a !

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i ELECTRICAL POWER SYSTEMS BASES A.C. SOURCES. D.C. SOURCES. AND ONSITE POWER DISTRIBUTION SYSTEMS (Continued)

The loadina rance for the diesel oenerators (4000-4400 Kw) as specified in surveillance reauirements is eoual to approximately 90 to 100 percent of its continuous ratina.

This Drovides for a range to Conduct testinO Without inadvertentiv overloadin0 of the diesel Generators. Inadvertent overloadina creates unnecessary wear and mechanical stress that may adverselv affect the reliability and lonoevity of the diesel oenerators.

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1 WATERFORD - UNIT 3 B 3/4 2b

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i W3F1-97-0035 i ATTACHMENT B REVISED TECHNICAL SPECIFICATION 4 1

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3/4.8 ELECTRICAL POWER SYSTEMS 3/4.8.1 A.C. SOURCES OPERATING LIMITING CONDITION FOR OPERATION 3.8.1.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:

a. Two physically independent circuits between the offsite transmission network and the onsite Class 1E distribution system, and

b. Two separate and independent diesel generators, each with:

1. Diesel oil feed tanks containing a minimum volume of 339 gallons of fuel, and

2. A separate diesel generator fuel oil storage tank containing:

a. A minimum volume of 38,760 gallons of fuel, or

b. A fuel oil volume less than 38,760 gallons and greater than 38,000 gallons of fuel for a period not to exceed 5 days (provided replacement fuel oil is onsite within the first 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months ), and

3. A separate fuel transfer pump.

APPLICABILITY: MODES 1,2,3, and 4.

ACTION:

a. With one offsite circuit of 3.8.1.1a inoperable, demonstrate the OPERABILITY of the remaining offsite A.C. circuit by performing Surveillance Requirement 4.8.1.1.1a within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter. . Restore the offsite A.C. circuit to l OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

b. With one diesel generator of 3.8.1.1b inoperable, demonstrate the OPERABILITY of the offsite A.C. circuits by performing Surveillance Requirement 4.8.1.1.1a (separately for each offsite A.C. circuit) within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter. If the diesel generator became inoperable due to any cause other than an inoperable support system, an independently testable component, or preplanned preventive maintenance or testing, demonstrate the OPERABILITY of the remaining OPERABLE diesel generator (unless it has been successfully tested in the last 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months ) by performing Surveillance Requirement 4.8.1.1.2a.4 within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months unless the absence of any potential common mode failure for it e remaining diesel Generator is demon.d. rated. Restore the diesel generator to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be t . d. least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

c. With one offsite A.C. circuit and one diesel Generator of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining offsite A.C. circuit by performing Surveillance Requirement 4.8.1.1.1a within 1 ,

hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; and, if the diesel generator became inoperable due to any cause other than an inoperable support system, an Independently testable component, or preplanned preventive maintenance or testing, demonstrate the OPERABILITY of the remainin0 OPERABLE diesel generator by performing Surveillance Requirement 4.8.1.1.2a.4 within 8 WATERFORD - UNIT 3 3/4 8-1 AMENDMENT NO. 23,92 l

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ELECTRICAL POWER SYSTEMS l

' ACTION (Continued) hours (unless it is already operating) unless the absence of any potential common mode failure for the remaining diesel generator is demonstrated. Restore at least one of the inoperable sources to OPERABLE status within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . Restore the other A.C. power source (offsite A.C. circuit or diesel generator) to OPERABLE status in acco. lance with the provisions of ACTION statement a or b, as appropriate, with the time requirement of that ACTION statement based on the time of initialloss of the remaining inoperable A.C. power source. A successful test of diesel generator OPERABILITY per Surveillance Requirement 4.8.1.1.2a.4 perfom,ed under this ACTION statement satisfies the diesel generator test requirement of ACTION statement a or b.

d. With one diesel generator inoperable, in addition to ACTION b. or c. above, verify that:

(1) All required systems, subsystems, trains, components, and devices that depend on the remaining OPERABLE diesel generator as a source of emergency power are also OPERABLE, and (2) When in MODE 1,2, or 3, the steam-driven emergency feed pump is

OPERABLE.

i If these conditions are not satisfied within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

e. With two of the above required offsite /s.C. circuits inoperable, restore one of the l inoperable offsite A.C. circuits to OPERABLE status within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or be in e' least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . Following restoration of one offsite A.C. circuit, hilow ACTION statement a with the time requirement of that ACTION statement based on the time of initial loss of the remaining inoperable offsite A.C. circuit. A successful test of s

diesel generator OPERABILITY per Surveillance Requirement 4.8.1.1.2a.4 performed under this ACTION statement satisfies the diesel generator test requirement of ACTION statement a.

l f. With two of the above required diesel generators inoperable, demonstrate the OPERABILITY of two offsite A.C. circuits by performing Surveillance Requirement 4.8.1.1.1a within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; restore one of the inoperable diesel generators to OPERABLE status within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . Following restoration of one diesel generator, follow ACTION statement b with the time requirement of that ACTION statement based on the time of initialloss of the remaining inoperable diesel generator.

WATERFORD - UNIT 3 3/4 8-2 AMENDMENT NO. 23

. ' i ELECTRICAL POWER SYSTEM -t

} SURVEILLANCE REQUIREMENTS ;

~

, 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and ;

the onsite Class 1E distribution system shall be: j

a. Determined OPERABLE at least once per 7 days by verifying correct breaker :

abgnments, indicated power ava!! ability, and l 4

b. Demonstrated OPERABLE at least once per 18 months by transferring manually and

automatically unit power supply from the normal circuit to the attemate circuit. !

4.8.1.1.2 Each diesel generator shall be demonstrated OPERABLE *:

l a. At least once per 31 days -

9 on a STAGGERED TEST BASIS by: ,

Verifying the fuel level in the diesel oil feed tank, l 1.

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2. Verifying the fuel level in the diesel generator fuel oil storage tank, !

3. Verifying the fuel transfer pump can be started and transfers fuel from l the storage system to the diesel oil feed tank,

4. Verifying the diesel starts 1". The generator voltage and frequency shall be at least 3g20 volts and 58.8 Hz in 510 seconds after the start signal. The steady . t 4

state voltage and frequency shall be maintained at 4160 + 420,-240 volts and 60 !

i 1.2 Hz. The diesel generator shall be started for this test by using one of the !

following signals: l a) Manual.

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) b) Simulated loss-of-uffsite power by itself. !

c) Simulated loss-of-offsite power in conjunction with an ESF actuation test signal.

d) An ESF actuation test signal by itself.

'All planned starts for the purpose of surveillance in this section may be preceded by a prelube period as recommended by the manufacturer.

"A modified diesel generator start involving idling and gradual acceleration to synchronous speed may be used for this surveillance requirement as recommended by the manufacturer. When modified start procedures are not used, the time, speed, voltage, and frequency tolerances of this surveillance requirement must be met.

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/ l WATERFORD - UNIT 3 3/4 8-3 AMENDMENT NO. 23, 74

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ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

5. Verifying the generator is synchronized, loaded to an indicated 4000-4400 Kw' in accordance with the manufacturer's recommendation and operates for at least an additional 60 minutes, and

6. Verifying the diesel generator is aligned to provide standby poweri *% associated emergency busses.

7. At least once per 184 days a diesel generatur fast start test shall be perofrmed in accordence with TS 4.8.1.1.2a.4. Performance of the 184 day fast start test satisfies the 31 day testing requirements specified in TS 4.8.1.1.2a.4.

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 diesel oil feed tanks.

c. At least once per 92 days and from new fuel oil prior to addition to the storage tanks, by obtaining a sample of fuel oil in accordance with ASTM-D270-1975, and by verifying that the sample meets the following minimum requirements and is tested within the specified time limits:

1. As soon as sample is taken (or prior to adding new fuel to the storage tank) verify in accordance with the test spacified in ASTM-D975-77 that the sample has:

a) A water and Jediment content of less or equal to 0.05 volume percent.

b) A kinematic viscosity @ 40*C of greater than or equal to 1.9 centistokes, but less than or equal to 4.1 centistokes.

c) A specific gravity as specified by the manufacturer @ 60/60 F of greater than or equal to 0.85 but less than or equal to 0.99 or an API gravity @ 60*F of greater than or equal to 11 degrees but less than or equal to 35 degrees.

2. Verify an impurity level of less than 2 mg of insolubles per 100 ml when tested in accordance with ASTM-D2274-70; analysis shall be completed within 7 days after i obtaining the sample but may be performed after the addition of new fuel oil; and i l

1

This band is meant as guidance to avoid routine overloading of the engine. Loads in excess of this band !

for special testing under direct monitoring of the manufacturer or momentary variation due to changing bus loads shall not invalidate the test. l 1

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WATERFORD - UNIT 3 3/4 8-4 AMENDMENT NO.-443,92 ,

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U ELECTRICAL POWER SYSTEMS

'SURVElLLANCE REQUIREMENTS (Continued) -

3. Verify the other properties specified in Table 1 of ASTM-D975-1977 and Regulatory Guide 1.137. Revision 1, October 1979, Position 2.a., when tested in accordance with ASTM-D975-1977; analysis shall be completed within 14 days after obtaining the sample but may be performed after the addition of new fuel oil. Failure to meet this requirement shall not affect diesel generator OPERABILITY; however, corrective action shall be initiated within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months to retum the fuel oil supply to within acceptable limits.

i

d. At least once per 18 months during shutdown by

4 1. Verifying the generator capability to reject a load of greater than or equal to 498 kW while maintaining voltage at 4160 + 420,-240 volts and l frequency at 60 +4.5, -1.2 Hz.

2. Verifying the generator capability to reject a load of an indicated 4000-4400 kw l l without tripping. The generator voltage shall not exceen 5023 volts during and following the load rejection.

l 3. Simulating a loss-of-offsite power by itself, and:

a) Verifying deenergization of the emergency busses and load shedding from the emergency busses. l b) Verifying the diesel starts on the auto-start signal, energizes the emergency busses and the permanently connected loads within 10 l seconds after the auto-start signal, energizes the auto-connected shutdown loads through the load sequencer 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 emergency busses shall be maintained at 4160 + 420,-240 volts and 60 +

1.2, -0.3 Hz during this test.

4. Verifying that on an SIAS 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 steady-state generator voltage and frequency shall be 4160 + 420,-240 volts and 601 1.2 Hz within 10 seconds after the auto-start signal; the generator voltage and frequency shall be maintained within these limits during this test.

WATERFORD - UNIT 3 3/4 8-5 AMENDMENT NO. 47 2474;48,98 l l

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' ELECTRICAL POWER SYSTEMS !

SURVEILI.ANCE REQUIREMENTS (Continued)

S. Simulating a loss-of-offsite power in conjunction with an SIAS actuation test signal, and i

a) Verifying deenergization of the emergency busses and load shedding from the emergency busses. {

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b) Verifying the diesel starts on the auto-staat signal, energizes ,

the emergency busses and the permanently connected loads within 10 l J seconds after the auto-start signal, energizes the auto-connected i emergency loads through the load sequencer and operates for greater i than or equal to 5 minutes. After energization, the steady-state voltage j and frequency of the emergency busses shall be maintained at 4160 +

420,-240 volts and 60 + l.2, -0.3 Hz during this test. l c) Verifying that all automatic diesel generator trips, except engine overspeed and generator differential, are automatically bypassed upon loss of voltage on the emergency bus concurrent with a safety injection actuation signal.

6. Verifying the diesel generator operates for an interval of not less t'aan 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

During 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of this test, the diesel generator shall be loaded to an indicated 4700 to 4900 Kw* and during 22 hours2.546296e-4 days 0.00611 hours 3.637566e-5 weeks 8.371e-6 months of this test, the diesel generator shall be loaded to an indicated 4000 to 4400 Kw.* The generator voltage and frequency shall be 4160 + 420,-240 volts and 60 t 1.2 Hz within 10 seconds after the start signal; the steady-state generator voltage and frequency shall be 4160 i 420 volts and 60 + l.2, -0.3 Hz durir:g this test.' Wdhin 5 minutes after completing this 24-hour test, perform Surveillance Requirement 4.8.1.1.2.a.4 .** l

7. Verifying that the auto-connected loads and permanently connected loads to each l diesel generator do not exceed the 2000-hour rating of 4400 kW.

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This band is meant as guidance to avoid routine overloading of the engine. Loads in excess of this band for special testing under direct monitoring of the manufacturer or momentary variation due to changing bus loads shall not invalidate the test.

- 1f Surveillance Requirement 4.8.1.1.2.a.4 is not satisfactorily completed, it is not necessary to repeat the preceding 24-hour test. Instead, the diesel generator may be operated at an indicated 4000 -4400 kw*

for 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or until internal operating temperatures have stabilized.

l WATERFORD UNIT 3 3/4 6-6 AMENDMENT NO. 4,23,71, 98 l

. _ _ _ _ . _ _ _ _ _ _ . _ _ .y ELECTRICAL POWER SYSTEMS !

SURVElLLANCE REQUIREMENTS (Continued) l l

8. Verifying the diesel generators capability to: j a) Synchronize with the offsite power source while the generator is loaded with its emergency loads upon a simulated restoration of offsite power, j b) Transfer its loads to the offsite power source, and ;

c) Be restored to its standby status.

9. Verifying that with the diesel generator operating in a test mode (connected to its bus), a simulated safety injection signal overrides the test 1 mode by (1) retuming the diesel generator to standby operation and (2) 1 automatically energizes the emergency loads with offsite power.

10. Verifying that each fuel transfer pump transfers fuel to its associated diesel oil feed tank by taking suction from the opposite train fuel oil storage tank via the installed cross connect.

11. Verifying that the automatic load sequence timer is OPERABLE with the time of each load block within 110% of the sequenced load block time.

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

a) tuming gear engaged b) emergency stop l c) loss of D.C. control power d) govemor fuel oillinkage tripped

e. At the first refueling outage, and thereafter, at intervals not to exceed 24 months, subject the diesels to an inspection in accordance with procedures prepared in conjunction with its manufacturers recommendations for this class of standby service.

f. At least once per 10 years or after any modifications which could affect diesel generator interdependence by starting the diesel generators simultaneously, during shutdown, and verifying that the diesel generators accelerate to at least 600 rpm (60 i l 1.2 Hz) in less than or equal to 10 seconds.

i i g. At least once per 10 years by:

4 1. Draining each diesel generator fuel oil storage tank, removing the j accumulated sediment, and cleaning the tank using a sodium hypochlorite t solution or equivalent,or an appropriate mechanical method (such as pressure i

washing or manual wiping).

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i WATERFORD - UNIT 3 3/4 8-6a AMENDMENT NO. 23,92 l l

t ELECTRICAL POWER SYSTEMS .

SURVEILLANCE REQUIREMENTS (Continued) ;

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h. By performing a visual inspection of the interior of the diesel generator fuel {

oil storage tanks each time the tank is drained and, if necessary, clean the tank with a '

sodium hypochlorite solution, or equivalent, or with an appropriate mechanical method ,

(such as pressure washing or manual wiping).

4.8.1.1.3 Reports - (Not Used).

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l l WATERFORD - UNIT 3 3/4 8-6b AMENDMENT NO. 23

V TABLE 4.8-1 DIESEL GENERATOR TEST SCHEDULE Not Used l l

v s o y ELECTRICAL POWER SYSTEMS BASES.

A.C. SOURCES. D.C. SOURCES. AND ONSITE POWER DISTRIBUTION SYSTEMS (Continued)

The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are consistent with the recommendations of Regulatory Guides 1.9 " Selection of Diesel Generator Set Capacity for l Standby Power Supplies," 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 Standby Diesel Generators," Revision 1, October 1979. Other provisions are derived from Generic Letter 93-05 "Line-Item Technical Specifications improvements to Reduce Surveillance Requirements for Testing During Power Operation" 94-01

Removal of Accelerated Testing and Special Reporting Requirements for Emergency Diesel Generators," and NUREG 1432 Standard Technical Specifications Combustion Engineering Plants The minimum voltage and frequency stated in the Surveillance Requirement are those necessary to ensure the diesel generator can accept the Design Basis Accident loading while maintaining acceptable voltage l' and frequency levels. Stable operation at the nominal voltage and frequency values is also essential to establishing diesel generator OPERABILITY, but a time constraint is not imposed. This is because a typical diesel generator will experience a period of voltage and frequency oscillations prior to reaching steady state operation if these oscillations are not dampened out by load application. This perici may extend beyond the 1 second ;

acceptance criteria and could be a cause for failing the Surveillance Requirement. In lieu of a time constraint in i the Surveillance Requirement, the actual time to reach steady state operation is monitored and trended. This is to ensure there is no voltage regulator or govemor degradation which could cause a diesel generator to become inoperable. The 10 seconds in the Surveillance Requirement is met when the diesel generator first reaches the specified voltage and frequency, at which time the output breaker would close if an automatic actuation had occurred. 1 The diesel generator Surveillance testing performed once per 18 months during shutdown is in accordance with Regulatory Guide 1.108, Regulatory Position C.2.

The maximum voltcge limit in surveillance test 4.8.1.1.2.d.2 was increased to 5023 volts in response to NRC Information Notice 91-13; Inadequate Testing of Emergency Diesel Generators. A maximum voltage limit is provided to ensure that components electrically connected to the diesel generator are not damaged as a result of the momentary voltage excursion experienced during this test.

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."

Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage on float charge, connection resistance values and the performance of battery service and discharge tests ensures the effectiveness of the charging system, the ability to handle high discharge rates l and compares the battery capacity at that time with the rated capacity.

Table 4.8-2 specifies the normal limits for each designated pilot cell and each connected cell for electrolyte level, float voltage, and specific gravity. The limits for the designated pilot cells float voltage and i specific gravity, greater than 2.13 volts and 0.015 below the manufacturers full charge specific gravity or a battery charger current that had stabilized at a low value, is characteristic of a charged cell with adequate capacity. The normal limits for each connected cell for float voltage and specific gravity, greater than 2.13 volts and not more than 0.020 below the manufacturers full charge specific gravity with an average specific gravity of all the connected cells not more than 0.010 below the manufacturer's full charge specific gravity, ensures the OPERABILITY and capability of the battery.

WATERFORD - UNIT 3 B 3/4 8-2 AMENDMENT NO.,92 l

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ELECTRICAL POWER SYSTEMS BASES A.C. SOURCES. D.C. SOURCES. AND ONSITE POWER DISTRIBUTION SYSTEMS (Continued)

The Onsite Power System includes three 4.16 kV ESF buses (3A3-S,3B3-S, and 3AB3-S).

Power for safety related loads is normally supplied by the non-safety related 4.16 kV buses (3A2 and 3B2) of the Offsite Power System. Shou!d offsite power from either of these buses be lost, the Onsite Power System will receive power automatically from the appropriate diesel generator. Non- l safety related loads will be automatically disconnected from the safety Onsite Power System. Each ,

ESF bus (3A3-S or 3B3-S) is redundant to the other; each can supply sufficient power to its safety i related loads to enable safe shutdown, or to mitigate the consequences of a design basis accident. l The third bus,3AB3-S, may be connected to either 3A3-S or 3B3-S, but never to both. Therefore 3AB3-S is not considered as a third, separate source of ESF power. The three ESF buses and their loads are tested as described below.

Surveillance requirements 4.8.1.1.2.d.3 and 4.8.1.1.2.d.5 are the integrated testing requirements that demonstrate the as designed operation of the standby A.C. power sources during loss of the offsite power source and during a loss of offsite power in conjunction with a Safety injection Actuation Signal (SlAS).

The testing verifies all actions encountered from the loss-of-offsite power (LOOP), including shedding of the nonessentialloads and the energizing of the emergency busses and respective loads from the diesel generator. It further demonstrates the capability of the diesel generators to automatically achieve the required voltage and frequency within the specified time.

l The requirement to verify the connection and energization of permanently connected loads !

and auto-connected loads is intended to satisfactorily show the relationship of these loads to the diesel generators loading logic. Permanently connected loads are those loads that remain connected to the bus upon the bus deenergizing and are subsequently energized by the diesel generators. Auto connected loads are those loads that are disconnected from the bus upon the bus deenergizing and are auto-connected through the automatic load sequencer. Surveillance 4.8.1.1.2.d.3b verifies the diesel generators capability to energize the shutdown loads and surveillance 4.8.1.1.2.d.5b verifies j the diesel generators capability to energize the emergency loads. Shutdown loads are those loads required upon a LOOP (Re: FSAR Table 8.3.1). Emergency loads are those loads required upon a LOOP in conjunction with an SIAS. This testing verifies that in the event of a Design Bases Accident j

(DBA) coincident with a loss of offsite power, the diesel generators are capable of supplying the -

necessary power to Engineered Safety Features (ESF) systems so that the fuel, Reactor Coolant System (RCS), and containment design limits are not exceeded.

Surveillance requirement 4.8.1.1.2d.1 requires the verification at least once per 18 months of the diesel generators' ability to reject a load of greater than or equal to 498 Kw while specific voltage and frequency constraints are maintained. The intent of this Surveillance requirement is to require the diesel generator to reject the largest single load. The largest single load on the diesel generator Is the Essential Chiller which requires 430 Kw under tomado/ missile conditions. The difference l

between the specified 498 Kw load in the Surveillance requirement and the 430 Kw required by the actuallargest single load is a margin of conservatism. A method of rejecting a load greater than or equal to 498 Kw utilizing the wet and dry cooling tower fans has been developed and will satisfy the Surveillance requirement.

I WATERFORD - UNIT 3 8 3/4 8-2a

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' - ,o ,e , o ELECTRICAL POWER SYSTEMS

-BASES A.C. SOURCES. D.C. SOURCES. AND ONSITE POWER DISTRIBUTION SYSTEMS (Continued)

The loading range for the diesel generators (4000-4400 Kw) as specified in surveillance requirements is equal to approximately go to 100 percent of its continuous rating.

This provides for a range to conduct testing without inadvertently overloading of the diesel generators. Inadvertent overloading creates unnecessary wear and mechanical stress that may adversely affect the reliability and longevity of the diesel generators.

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I WATERFORD - UNIT 3 B 3/4 2b

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ML20135B844

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