ML20059L205

Proposed Tech Specs Changing Unit 1,Section 4.9 & Unit 2, Section 4.8 Re Diesel Generator Testing Under Hot Initial Conditions

ML20059L205
Person / Time
Site:	Hatch
Issue date:	11/09/1993
From:	GEORGIA POWER CO.
To:
Shared Package
ML20059L185	List: HL-3433, Application for Amend to Licenses DPR-57 & NPF-5 Revising Unit 1 TS 4.9 & Unit 2 TS 4.8 Re Diesel Generator Testing Under Hot Initial Conditions ML20059L205
References
NUDOCS 9311160346
Download: ML20059L205 (19)

Text

Enclosure 3 Edwin I. Hatch Nuclear Plant Request to Resise Technical Specifications: .

Diesel Generator Surveillance Requirements ,

Page Chance Instructions The proposed change to the Plant Hatch Unit 1 Technical Specifications will be incorporated as follows: ,

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3.9-2c 3.9-2c i 3.9-2d 3.9-2d ,

3.9-4a 3.9-4a  !

3.9-11 3.9-11 The proposed change to the Plant Hatch Unit 2 Technical Specifications will be incorporated as  !

follows: ,

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3/4 8-5 3/4 8-5 1 3/4 8-Sa  !

3/4 8-5b I B 3/4 8-1 B 3/4 8-1 B 3/4 8-2 l

McCluskic 006047 r; E3-1 9311160346 931109 h PDR ADOCK 050003 1 1 P

l LIMITI% COOITICNS FOR OPERATION SURVEILLANCE REOUIREE NTS 3.9.A.2. Standby AC Power Sucolv (Diesel 4.9.A.2. Standby AC Power Suoolv (Diesel ,

Generators IA.18. and IC) Generators IA.18. and IC) >

I (Continued) (Continued) f

a. Doerability (Continued)  !

II. Once every 18 months during I shutdcun, a hot start test I shall be perfomed for each i diesel generator as follows:  ;

Each diesel generator shall ,

be operated for 2 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> j loaded 12565 kW'. Within i 5 minutes of shutting down ,

the diesel generator

• following this run, it shall be verified the '

diesel generator starts and '

achieves, in s 12 seconds, i voltage 1 3740 V and s 4580 V, and frequency ,,

1 58.8 Hz and 5 61.2 Hz.

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b. Diesel Battery (125 Volt) b. Diesel Battery (125 volt) l Each 125-volt diesel battery Each 125-volt diesel battery t is operable and capable of shall be subjected to the

• supplying the required load. same periodic surveillance as the plant batteries in Spect- l fication 4.9.A.3. t

c. Battery Chamer c. Battery Chamer An operable battery charger is Indicators shall be provided '

available. Each battery charger to nonitor the status of f shall have adequate capacity to the battery charger supply.

restore its battery to full j This instroentation shall charge within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> from a include indication of output i.

discharged condition while current and output voltage.  !

carrying the DC load.

j l d. Diesel Fuel d. Diesel Fuel There shall be a mininsn of 99,000 gallons of acceptable 1. The quantity of diesel  ;

diesel fuel in the diesel fuel available in each- '

fuel storage tanks and a fuel storage tank and minimum of 900 gallons (

fuel day tank shall be i in each diesel fuel day tank. measured and recorded concurrently with the '

operability test speci- i fied for the diesel in  ;

Specification 4.9.A.2.a.l. -'

• • ic entary transients outside of it.ad range do not invalidate this test.

I "Fcr the IB diesel generator, a single het start test every 18 nonths will i satisfy the requirements of Unit 1 Specification 4.9.A.2.a.ll and Unit 2 i

Specification 4.8.1.1.2.d.14.

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t tlw111NS CtrOlTIONS f 00. OPERATION STVEILLAPCE REQUIPMN15 i

3.9.A.2. Standby AC Pwr Surriv Diesel 4.9.A.2. Standby AC Pmser kmnly (Diesel l Generaters la. 19. and IC) Generators lA. la. and IC) l (Continuad) (Continued) j

d. Diesel Fuel (Cantinued) ,

2. At least once per 92 days by verifying that a sanole  ;

of diesel fuel from the fuel storage tank, obtained in accordance with ASIM-D270-65,  !

is within the acceptable limits specified in Table 1 of ASTM D975-74 when checked ,

for viscosity, water and sediment. ,

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e. Fuel Oil Transfer Pers e. Fuel Oil Tra9sfer Ptres -

i A fuel oil transfer prp shall be operable and capable 1. The operation of the diesel {;

cf transferring fuel oil fuel oil transfer pacs to 4 l

from the storage system to transfer fuel from the the day tank. storage system to the day l

i tank shall be demnstrated concurrent with the oper- '

ability test specified for i that diesel in Specification 4.9.A.2.a.l.

2. The operation of the diesel .!

fuel oil transfer pops to

' transfer fuel from each ,

associated fuel storage  !

tank to the day tank cf each diesel, via the '

installed cross connection lines, shall be demonstrated I at least once per 18 mnths  ;

during shutd m . ,

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1 LIMITINS C0F01T1945 FOR OPErJ. TION SURVElttME REQUIREMENTS i

I 3.9.A.7. Looit Syste-s (Continued) 4.9.A.7. Loait Systems (Continued)  ;

f j 2. Deleted

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3. Deleted .!

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l i I c. The corron accident signal c.). Once every 18 months during

logic syster

, and undervolt- shutdown, each diesel generator 6

} age relays and supporting shall be demonstrated operable system are operable. by simulating a loss of offsite power in conjunction with  ;

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" an accident test signal i and verifying: de-energization

' of the emergency buses and load shedding from the energency i buses; and the diesel starts  !

on the auto-start signal with i d

periranently connected loads in  ;

s 12 seconds, energizes the  !

l auto-connected shutdown '

(emergency) loads through the lead sequencer, operates for ,

2 5 minutes while its  !

generator is loaded with  !

2 the energency loads, and I j achieves and maintains a .i steady-state voltage of l 4160 2 420 volts and a  !

!' steady-state frequency of  !

60 1 1.2 Hz. j

2. The undervoltage relays for the '

start buses shall be calibrated-l annually for trip and reset j

- voltages and the measurements '

< recorded. l i 3. Verify, once per 18 months I during shutdown, that all-i' diesel generator trips, except engine overspeed, lw lube oil pressure, and generator 4

differential, are automatically bypassed upon loss of voltage on the seergency bus concurrent

, with an ECCS actuation signal.

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u 6,a 4 J BASES FOR SURVEILLANCE REQUIREE NTS 4.9. AUXILIARY ELECTRICAL SYSTDtS A. Auxiliary Electrical Systens Ecuitrent The auxiliary electrical power systems shall be functionally tested and in-spected at a frequency to assure a high reliability of operation and a high G ree of performance. This surveillance program is designed to meet the <

intw. nf ' Proposed IEEE Criteria for Class IE Electric Systems for Nuclear i Power Generating Stations" (Standard No. 308).  ;

2. Staedby AC Power Sunolv (Diesel Generators 1A.18. and IC)

a. Operability Upon demand, the standby diesel gexrators shall start automatically and reach rated frequency and voltage within 12 seconds (unloaded). Based on the operation of all diesel generation units and all emergency buses, i the diesel generators are capable of accepting all AC loads within 40 seconds. Since the diesel generators are utilized as standby power I sources, readiness is of prime inportance. Readiness can best be demon-  !

strated by testing, which insofar as practicable simulates actual amer- ,

gency conditions. The testing program is designed to test both the abilitv to  !

start and the ability to run the diesel generators under load for extended j periods of operation.  ;

Each diesel generator unit is furnished with two conpletely independent' air starting systems, either of which is capable of starting the diesel i engine five times without rechaging.

The monthly test of the diesel generators is conducted to check for equip- -t ment failures and deterioration. Testing is conducted until the diesels  !

reach equilibritan operating conditions to denonstrate pmper operation of ,

these conditions. Each diesel shall be manually started, synchronized to the l bus, and load picked up. The diesels shall be loxled to at least one-half rated load to prevent fouling of the engines. The diesel generators .

will nomally be run for at least one hour. In addition, during the test  ;

l when the generator is synchronized to the bus, it is also synchronized to -

the offsite power source and thus is not conpletely independent of this [

source. Only one diesel shall be tested at a time to prevent parallel operation with another. .

The hot start test is perforned on each diesel generator every 18 months. This  !

surveillance demonstrates that the diesel engine can restart from a hot i condition, such as subsequent to shutdown from nomal surveillances, and achieve +

the required voltage and frequency within 12 seconds. The 12 second time is i derived from the requirements of the accident analysis. The 18 month frequency I is consistent with the recommendations of Regulatory Guide 1.108. The  !

requirement that the diesel has operated for at least 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at near full load .j conditions prior to performance of this surveillance is based on manufacturer j l recomendations for achieving hot conditions. Momentary transients due to i l changing bus loads do not invalidate this test. j i i

b. Diesel Battery (125 Volt)

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The surveillance of the diesel generator starting batteries is designed  ;

to provide an early indication of potential failure. 1

c. Battery Charger The battery chargers are monitored to assure adequate battery charge supply and are capable of recharging their assigned battery while carrying j the normal loads.  ;

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d. Qiesel fuel ,

Quantity and ouality checks assure sufficient acceptable fuel to maintain  !

the mininum fuel supply requirements and to avoid damage to the diesel en-gine.  ;

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ELECTRICAL POWER SYSTEMS SURVEllLANCE RE0VIREMENTS (Continued)

9. Verifying that the diesel generator operates for at least 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. During the first 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of this test, the diesel generator shall be loaded to 13000 kW* and during the remaining 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> of this test, the diesel generator shall be loaded to 2775-2825 kW*.**

10. Verifying that the auto-connected loads to each diesel generator do not exceed the 2000-hour rating of 3100 kW.

11. Verifying the diesel generator's 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, b) Transfer its loads to the offsite power sourcc, and c) Proceed through its shutdown sequence.

12. Verifying that with the diesel generator operating in a test mode (connected to its bus), a simulated LOCA actuation signal overrides the test mode by: (1) returning the diesel generator to standby operation and (2) auto-matically energizes the emergency loads with offsite power.

13. Verifying that the fuel transfer pump transfers fuel from each associated fuel storage tank to the day tank of each diesel via the installed cross connection lines.

14. Operating each diesel generator for 2 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> loaded 2 2565 kW',

and within 5 minutes of shutting down the diesel generator following this run, it shall be verified the diesel generator starts and achieves, in 512 seconds, voltage 2 3740 V and 5 4580 V, and frequency 2 58.8 Hz and s 61.2 Hz.***

• Momentary variations outside this band shall not invalidate the test.

For the IB diesel generator, a single 24-hour load test every 18 months will satisfy the requirements of Unit 1 Specification 4.9.A.2.a.6 and Unit 2 Specification 4.8.1.1.2.d.9.

For the IB diesel generator, a single hot start test every 18 months will satisfy the requirements of Unit 1 Specification 4.9.A.2.a.ll and Unit 2 Specification 4.8.1.1.2.d.14.

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SURVEILLANCE REQUIREMENTS (Continued)  !

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l e. At least once per 10 years or after any modifications which i l could affect diesel generator interdependence by starting both l diesel generators simultaneously, during shutdown, and verifying i that both diesel generators accelerate to synchronous speed in l l 5 12 seconds.  !

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3/4.8 ELECTRICAL POWER SYSTEMS BA5ES The OPERABILITY of the A.C. and D.C. power sources and associated distribution systems during operation ensures that sufficient power will be available to supply the safety related equipment required for (1) the safe shutdown of the facility and (2) the mitigation and control of accident conditions within the facility. The minimum specified indepen-dent and redundant A.C. and D.C. power sources and distribution systems satisfy the requirements of General Design Criterion 17 of Appendix "A" to 10 CFR Part 50.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the level of degrad. ' ion. The OPERABILITY of the power sources are consistent with the initi I condition assumptions of the accident analyses and are based upon maintaining at least one of the onsite A.C. and D.C. power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss of offsite power and single failure of the other onsite A.C. source.

Each of the five diesel generators is provided with a storage tank and a day tank. The 33,000 gallons required to be maintained in each of the fuel oil tanks represents a total volume of oil sufficient to operate any four diesel generators at 3250 kW for a period of 7 days. This is based on a conservative expected fuel consumption of 240 gallons per hour per engine.

The onsite fuel capacity will last longer than the time it would take to replenish the onsite supply from offsite sources (which is

< 7 days). Valving is available so that fuel oil can be transferred between fuel oil storage tanks. However, administrative controls shall be in place to limit long-term total diesel generator load to s 13,000 kW, and to limit individual diesel generator loading to f 3250 kW.

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  ;

sufficient instrumentation  !

conditionforextendedtimeperiods,and(2)toringandmaintainingthe and control capability is available for moni I facility status.  ;

The surveillance requirements for demonstrating the OPERABILITY of l the diesel generators are in accordance with the recommendations of Regula-tory Guide 1.9, " Selection of Diesel Generator Set Capacity for Standby Power Supplies," March 10, 1971, Regulatory Guide 1.108, " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1, August 1977, and Generic Letter 84-15, " Proposed Staff Actions to Improve and Maintain Diesel Generator Reliability," July 2, 1984.

The hot start test specified in Regulatory Guide 1.108 has been modified to separate this test from the loss of offsite power functional test and the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> load test. The modified hot start test conforms to the BWR 4 Standard Technical Specifications, NUREG-1433. The hot s'; art test HATCH - UNIT 2 B 3/4 8-1 techsp\h\93-1002A. pro \l19

3/4.8 ELECTRICAL POWER SYSTEMS 2

I BASES is performed on each diesel generator every 18 months. This surveillance I demonstrates that the diesel engine can restart from a hot condition, such  ;

as subsequent to shutdown from normal surveillances, and achieve the required  !

voltage and frequency within 12 seconds. The 12 second time is derived from t the requirements of the accident analysis. The 18 month frequency is consistent with the recommendations of Regulatory Guide 1.108. The  ;

requirement that the diesel has operated for at least 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at.near full '

load conditions prior to performance of this surveillance is based on '

manufacturer recommendations for achieving hot conditions. Momentary transients due to changing bus loads do not invalidate this test.  ;

Primary containment electrical penetrations and penetration conductors are protected by either de-energizing circuits not required during reactor  ;

operation or demonstrating the OPERABILITY of primary and backup overcurrent protection circuit breakers by periodic surveillance.

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LIMIYlE COEITIGIS FGt GPERAT1GI N SLRVFIttAKE REIRJIRDOfTS

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.i 3.9.A.2. Stan&v E Power Supply (Diesel N y 4.9.A.2. Stan6v E Peer Sunoly (Diesel

Generators 1A. 1B. and IC) s canoratars 1A.1B. and IC)

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{ (Continued) m 4(Continued)  !

I b. Diesel Battery (125 Volt) b. Diesel Battery (125 Volt) i 1

• g gg) Each 125-volt diesel battery is operable and capable of Cach 125-volt diesel battery shall be sdjected to the i

j sgplying the mcpired load, same periodic surveillance as  ;

k, 7 . 2, G // the plant batteries in Speci-

^

4 fication 4.9.A.3.

A brff $CD)C7ES c. Batten Chamer c. Batten Chamer An operable battery da ger is Indicators shall be pmvided i

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[gU gg availatae. Each battery charger to monitor the status of a shall have adequate capacity to the battery charger sg ply. l

/p[ 6c,. restore its battery to full This instrumentation shall  !

charge within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> frtus a include indication of output  !

discharged condition elle curmnt and output voltage. l carrying the DC load.

d. Diestl Fuel t

d. Diesel Fuel 4 There shall be a minim a of 1. -The quantity of diesel l 99,000 gallons of acceptable l fuel available in each l diesel fuel in the diesel fuel storage tank and l fuel storage tanks and a fuel day tank shall be '

minima of 900 callons measumd and mcorded  ;

in each diesel fuel day tank. concurrently with the

• operability test speci-fled for the diesel in i Specification 4.9.A.2.a.1.

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2. At least once per 92 days l '

by verifying that a sanple of diesel fuel from the fuel ,

storage tank, obtained in ,

accordance with ASTM-D270-65, i is within the acceptable  !

limits specified in Table 1 of ASTM 0975-74 when checked [

for viscosity, water and  ;

sediment.

e. Fuel Oil Transfer P a s e. Fuel Oil Transfer Pas A fuel oil transfer pop ,

shall be operable and capable 1. The operation of the diesel I of transferring fuel oil fuel oil transfer peps to l frtn the storage system to transfer fuel from the the day tank. storage systen to the day tank shall be denenstrated concurrent with the oper-ability test specified for that diesel in Specification 4.9.A.2.a.l.

2. The operation of the diesel fuel oil transfer pens to transfer fuel from each associated fuel storage tank to the day tank of each diesel, via the installed cross connection lines, shall be demonstrated l at least once per 18 months 1 during shutdown.  !

l FMTCH - UNIT 1 3.9-2c Amendment No.178 1

4.9.A.2. Standby AC Power Supolv (Diesel  ;

Generators lA. 18. and IC) ,

(Continued)  ;

a. Doerability (Continued) j

11. Once every 18 months during shutdown, a hot start test .

shall be performed for each '

diesel generator as follows.

Each diesel generator shall be operated for >/- 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> loaded >/= 2565 kW . Within-5 minutes of shutting down the diesel generator following this run, it shall be verified the diesel generator starts and achieves, in </- 12 seconds, voltage >/- 3740 V and </- 4580 V, and frequenc

>/- 58.8 Hz and </- 61.2 Hz.y*

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• liomentary transients outside of load range do not invalidate this test.

• • For the IB diesel generator, a single hot start test every 18 months will satisfy the requirements of Unit 1 Specification 4.9.A.2.a.ll and Unit 2 Specification 4.8.1.1.2.d.14.

Llw1 TIE CO@lTIONS FOR ODERATICN S'JPVElttME REQUIEDECS l 3.9.A.7. Locie Syste's (Continued) 4.9. A.7. Locie Systems (Continue *1) ofc4rle

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3. Deleted  !

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c. The tsron accident signal c.). Once every 18 eonths during logic syste, and undervolt- shutdcwn, each diesel generator age relays and supporting shall be amonstrated operable system are operable. by sinslating a loss of offsite power in cor0 unction with an accident test signal and verifying: de-energization of the ememency buses and load shedding frtn the energency buses; and the diesel starts on the auto-start signal with permanently connected loads in 5 12 seconds, energizes the autcH:onnected shutckwi (emergency) loads thrtugh the load sewencer, operates for 1 5 minutes while its generator is leaded with the energency loads, and achieves and maintains a steady-state voltage cf 4160 1 420 volts and a '

steady-state fre @ency of 60 1 1.2 Hz.

2. The undervoltage relays for the start buses shall be calibrated annually for trip and reset voltages and the reasurerents recoroed.

3. Verify, once per 18 nonths during shutd:wn, that all diesel generator trips, exte;t engine overspeed, Icw lube oil pressure, and generator differential, are automatically bypassed upon loss of voltage  !

on the mergency bus concurrent with an ECCS actuation signal.

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BASES FOR SURVE1LLANCE RE001REMENTS 4.9. aux 1LIARY ELECTRICAL SYSTEMS A. Auxiliary Electrical Systems Eouioment The auxiliary electrical power systems shall be f unctionally tested and in-spected at a frequency tc, assure a high reliability of operation and a high degree of perf orfrence. This surveillance program is designed to meet the intent of ' Proposed IEEE Criteria for Class lE Electric Systems for Nuclear Power Generating Stations' (Standard No. 308).

2. Standby AC power Supply (Diesel Generators 1A. IB. and IC)

a. Operability Upon demand, the standby diesel generators shall start automatically and reath rated f requency and voltage within 12 seconds (unloaded). Based on the operation of all diesel generation units and all emergency buses, the diesel generators are capable of accepting all AC loads within 40 seconds. Since the diesel generators are utilized as standby power sources, readiness is of prime importance. Readiness can best be demon-strated by testing, which insofar as practicable simulates actual emer-gency conditions. The testing program is designed to test both the ability to start and the ability to run the diesel generators under load for extended periods of operation.

Each diesel generator unit is furnished with two completely independent air starting systems, either of which is capab1? of starting the diesel engine five times without recharging.

The mon +' ty test of the diesel generators is conducted to check f or equip-ment failures and deterioration. Testing is conducted until the diesels reach equilibrium operating conditions to demonstrate proper operation of these conditions. Each diesel shall be manually started, synchronized to the bus, and load picked up. The diesels shall be loaded to at least one-half s rated load to prevent fouling of the engines. The diesel generators

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will normally be run for at least one hour. In addition, during the test when the generator is synchronized to the bus, it is also synchronized to the offsite power source and thus is not completely independent of this NIgp source. Only one diesel shall be tested at a time to prevent parallel g/kk / ogeration with another.

b. Diesel Battery (125 volt)

The surveillance of the diesel generator starting batteries is designed Ngf to provide an early indication of potential failure.

[Mb c. Battery Charger The battery chargers are monitored to assure adequate _ battery charge supply and are capable of recharging their assigned battery while carrying l the nor*.al loads.

d. Diesel Fuel Quantity and Quality checks assure sufficient acceptable fuel to maintain the minimum fuel supply requirements and to avoid damage to the diesel en-gine.

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The hot start test is nerformed on each diesel generator every 18 months. This surveillance demonstrates that the diesel engine can restart from a hot condition, such as subsequent to shutdown from normal surveillances, and achieve the required voltage and frequency within 12 seconds. The 12 second time is derived from the requirements of the accident analysis. The 18 month frequency is consistent with the recommendations of Regulatory Guide 1.108. The requireroent that the diesel has operated for at least 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at near full load conditions prior to performance of this surveillance is based on manufacturer recommendations for achieving hot conditions. Momentary transients due to l

changing bus loads do not invalidate this test.

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ELECTRICAL POWER SYSTEMS SURVElltANCE REOUIREMENTS (Continued)

9. Verifying that the diesel generator operates for at least 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Du. ring the first 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of this test, the diesel generator shall be loaded to 13000 kW and during the remaining be 222775-2825 loaded to hours of thipkW--Ethin-5-minutes-ef

.,t,est, the diesel generator shall ter-compl etincy-

---this 24-hour tesh repeat urveillance-Requirement-

---4.6. i rl . 2.*5. b .-

10. Verifying that the auto-connected loads to each diesel generator do not exceed the 2000-hour rating of 3100 kW. l

11. Verifying the diesel generator's 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, b) Transfer its loads to the offsite power source, and c) Proceed through its shutdown sequence.

12. Verifying that with the diesel generator operating in a test mode (connected to its bus), a simulated LOCA actuation signal overrides the test mode by: (1) returning the diesel generator to standby operation and (2) auto-matically energizes the emergency loads with offsite power.

.^9, 13. Verifying that the fuel transfer pump transfers fuel from

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each associated fuel storage tank to the day tank of each I y da J }iesel via the installed cross connection lines.

e. At least once per 10 years or after any modifications which could affect diesel generator interdependence by starting both diesel generators simultaneously, during shutdown, and verifying that both diesel generators accelerate to synchronous speed in 1 12 seconds.

• Momentary variations outside this band shall- not invalidate the test. .

,g g e g u d For the IB diesel generator, a single 24-hour load test every 18 months will satisfy the requirements of Unit 1 Specification 4.9.A.2.a.6 and 7 g re r4 Unit 2 Specification 4.8.1.1.2.d.9.

! M h y<T

/ 4< If the dieseFgenerator-fails-this-testra-retest-may-be-performed -after

-the4iesebgeneratoritas-been-operatedictre hem 5 et 2-2565Er HATCH - UNIT 2 3/4 8-5 Amendment No. 83, 119

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Unit 2

14. Operating each diesel generator for >/= 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> loaded >/- 2565 kW*,  !

and within 5 minutes of shutting down the diesel generator following  ;

this run, it shall be verified the diesel generator starts and achieves, t in </= 12 seconds, voltage,>/- 3740 V and </- 4580 V, and frequency >/=

58.8 Hz and </= 61.2 Hz l

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For the IB diesel generator, a single hot start test every 18 months will satisfy the requirements of Unit 1 Specification 4.9. A.2.a.ll and Unit 2 Specification 4.8.1.1.2.d.14.

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3 /4.8 ELECTRICAL POWER SYSTEMS BASES The OPERABILITY of the A.C. and D.C. power sources and associated

-distribution systems during operation ensures that sufficient power will be available to su) ply the safety related equipment required for (l? the safe shutdown of tie facility, and J2) the mitigation and control of accident conditions within the fact"ity. The minimum specified indepen-dent and redundant A.C. and D.C. power sources and distribution systems satisfy the requirements of General Design Criterion 17 of Appendix "A" to 10 CFR Part 50.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation comensurate with the level of degradation. The OPERABILITY of the power sources are consistent with the initial condition assumptions of the accident analyses and are based upon maintaining at least one of the onsite A.C. and D.C. power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss of offsite power and single failure of the other onsite A.C. source.

Each of the five diesel generators is provided with a storage tank and a day tank. The 33,000 gallons required to be maintained in each of the fuel oil tanks represents a total volume of oil sufficient to operate any four diesel generators at 3250 kW for a period of 7 days. This is based on a conservative expected fuel consumption of 240 gallons per hour per engine.

The onsite fuel capacity will last longer than the time it would take to replenish the onsite supply from offsite sources (which is

< 7 dayss. Valving is available so that fuel oil can be transferred between fuel oil storage tanks. However, administrative controls shall be in place to limit long-term total diesel generator load to s 13,000 kW, and to limit individual diesel generator loading to s 3250 kW.

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 and condition and control for capability extended time periods,for is available mo(2? sufficient n1toring instrumentation and maintaining the facility status.

The surveillance requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regula-acit for Standby

) Testing tory Guide Power 1.9, "March Supplies," Selection of Diesel 10, 1971, Generator Regulatory GuideSet 1.l Cab 8, "feriodic of Diesel Generator Units Used as Onsite Electric Power Systems

//M7- at Nuciear Power Plants," Revision 1, August 1977, and Generic Letter

/p2AMM 84-15, " Proposed Staff Actions to Improve and Maintain Diesel Generator

,y Reliability," July 2, 1984.

f) M r / rimary P containment electrical penetrations and penetration conductors are protected by either de-ener izin operationordemonstratingthebPERA!ILITYofcircuits not required rimary during and backup reactor overcurrent G protection circuit breakers by periodic survei lance.

HATCH - UNIT 2 B 3/4 8-1 Amendment No. 119

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1 The hot start test specified in Regulatory Guide 1.108 has been modified tJ separate this test from the loss of offsite power functional test and the 24 i hour load test. The modified hot start test conforms to the BWR 4 Standard i Technical Specifications, NUREG-1433. The hot start test is performed or, each diesel generator every 18 months. This surveillance demonstrates that t'ae i diesel engine can restart from a hot condition, such as subsequent to.stutdown i from normal surveillances, and achieve the required voltage and frequency within 12 seconds. The 12 second time is derived from the requirements of the accident analysis. The 18 month frequency is consistent with the recommendations of Regulatory Guide 1.108. The requirement that the diesel has operated for at least 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at near full load conditions prior to performance of this surveillance is based on manufacturer recommendations for achieving hat conditions. Momentary transients due to changing bus loads do not ir. validate this test.

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