Text

Proposed App a Tech Specs,6-day Extension to Limiting Conditions for Operation for Repair of Diesel 1C During Facility Operation
	ML20009G959
Person / Time
Site:	Farley
Issue date:	07/31/1981
From:	; ALABAMA POWER CO.
To:	;
Shared Package
ML20009G958	List: ML20009G957; ML20009G959;
References
	NUDOCS 8108050298
	Download: ML20009G959 (13)
	v • d • e

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1 IlilTII.'G CONDITICM FOR OPi PATION .

3.8.1.1 As a minimua, the follo,;ing A.C. electrical power sources shall be OPERABLE:

a. Two physically independent circuits from the offsite transmission network to the switchyard and two physically indipendent circuits from the switchyard to the onsite Class 1E distributien system, 1 and

b. Two separate and independent diesel genera tor sets (one 4075

};w and one 28501:w) cach with:

1. Separate day tanks containing a rininum volume of 900 gallons of fuel for the 4075 hw diesel generators cnd 700 gallons of fuel for the 2350 l / diesel generators. y 1

2. A separate fuel transfer pump for each diesel. l t

c. A fuel storage systen consisting of four independent storage tanks each containing a mininun 25,0CJ gallons of fuel.

140 DES 1, 2, 3 and 4.

APPLILABILITY:

ACTIDQ:

a. With either an offsite circuit or a diesel generator set of the above required A.C. electrical paler sources inoperable, dem.cn-stra to the OPE? ABILITY of the remaining A.C. sources by per-forming Surveillance P.equirements 4.8.1;1,.1.a and 4.8.1.1.2.a.4 ,

within one hc.m and a t least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereaf ter; restore at least two of fsite circuits and both diesel generator sets to OPERABLE shtus within 722 hours0.00836 days 0.201 hours 0.00119 weeks 2.74721e-4 months or be in at least HOT STAND 3Y within the next 5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months and in COLD SHUTDOWM uithin the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

b. With one offsito c:rcuit and one diesel generator set of the 1 eizove required A.C electrical po'.;er sources inoperable, demsn-strate the OPFG LHY of the remaining A.C. sources by perfcrm-ing Surveilicnt: P.equire:ents 4.8.1.1.1.a and 4.8.1.1.2.a.4 within one hcur :md at least once per 8*fIours thereafter; !

restore at ler t on ;f the inoperable sources to OPEPACLE status within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months or be in at least HOT STAi:D3Y within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUfDOWN within the f., owing 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . Restore at least two offsite circuits and both diesel generator sets to OPEPABLE status within 72* hours from the time l Of initial loss er be in at least HOT STAND 3Y within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTOOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . ,

0cc tiiiic- o'7ily except h for repair of Diesel 1C - the 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months action staterent for op .> ability of uiesel 1C may be extended to a period of 9 days provided Diesel 1C is returned to 0?EPABLE -

status as soon as maintenance is completed. The provisions of spccification 3.0.4 are not. epplicable for this one time change.

- 0ne time only exception during repair of Diesel IC - t.he 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months interval test is extended to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months .

FARLEY-UNIT 1 3/4 8-1 8108050298 810731 PDR ADOCK 05000348 P pop

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ACT5D:! (Continued) ( (.

c. Ilith two of the above required offsite A.C. circuits inoper-able, dcmanstrate the OPERABILIlY of both diesel generetor sets by performing Surveillance I:equiremnt 4.8.1.1.2.a.4 -

within one hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereaf ter, unless the diesel gemrators are already operating; restore at least one of the ingrable of fsite source to OPEP.att status within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or be in at least !!0T STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . !!ith enly one offsite source restored, restora at least two offsite circuits to OPERNLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months from time of initici loss or be in at least liOT STAUD3Y within

.the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD Sl!UTCD'1M uithin the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

d. !!ith both of the above required diesel generator sets inoperable, demonstrale the OPERAB)l.IlY of two offsite A.C. circuits by -

performing Surveillance Requirement 4.8.1.1.1.a uithin one hour and at least once per 8 hourf'thereaf ter; restore at least one of the inoperable di sel generator sets to OPERABLE l 7 status within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or be in at least I!OT STANDBY uithin the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUfD0'.!M within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . Restore both diuel generator sets to OPERAutE status within 72^ hours free; time of initial loss 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 SHUTD3WN within the folloving 30 ha"rs. .

SURVEll1ANCE REQUIRE".ENTS 9 .. , - .-. .._. _.

4.8.1.1.1 Ecch of the abon independent circuits between the offsite I transmission network an; the onsite Class 1E distribution system shall be:

a. Determined 07.~ c.E at least once per 7 days by verifying correct breaker clim , indicated power availability, and

b. Demons' :ted 00 . E at least once per 18 nonths during shut-dowa by tr:sferring unit power supply from the noral circuit l to the alternt.e c: :uit. I 4.8.1.1.2 Lach diesel p .ca'ur set shall be demonstrated OPERABLE: f

a. At least once pr. 31 days, on a STACGERED TEST DASIS, by:

1. Verifying the fuel level in the day tank,

2. Ver-ifying the fuel level in the fuel storage tanks, I

0ne tiiiF6Hly exception for repair of Diesel IC - the 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months action state. ment for operability of Diesel IC may be extended to a period of 9 days provided Diesel 1C is returned to OPERABLE status as soon as maintenance is completed. The provisions of specification 3.0.4 arenot applicable for this one tiue change.

- 0ae time only evs.:ption during repair of Diesel it. - the 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months imerval test J is extended to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months .

FARLEY-UNil 1 3/4 8-2 l

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,' '3/I,.8.-.El t Cl.i!ICAL POWEk SYSTEib 3/4.8.1 A.C. SOURCES OPERATIlm 11MrTIlm CONDITION FOR OPERATION

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3.8.1.1 As a uinimua, the following A.C. electrical power sources shall be OPERABLE:

a. hro physically independent circuits between the of fsite transaission ~

neNork to the switchyard and two physically independent circuits frc,a the switchyard to the onsite Class lE distribution system, and

b. Two separate and independent diesel generator sets.(Set A: D3 1-2A and DG-1C, Set U: DG-2B and DG -2C) each with:

1. Separate ' day tanks containing a ninimum voltra of 903 g' allen 3 of f uel for the 4075 ku diesel generators and 700 gallons of

. fuel .for the 2850 kw diesel generator.

2. A separate fuel transfer pu:cp for each diesel.

c. A fuel storcge systen consisting of four, indeperd:nt storage

- tanks each centaining a m~iniscum of 25,000 gallons of fuel.*

,AJ'P.L]CABIlf fY: MODES i, 2, 3 and 4.

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ACTION: *

a. With an offsite circuit inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirenents

4. 8.1.1.1. a G 4.8.1.1.2.a.4 within one hour and at least once par 8

. hours therea':=r; restore at least two offsite circuits to OPEEELE

status viittin 72 haurs or he in at least HOT STA?O3Y vithin the nu.t 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and -in C: LD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

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b. : With one dien1 cenerator set inoperable, demonstrate the operability of the remair,-ing A.C. sources by performing Surveillance Eequirere.,ts 4.8.1. A".J.a and 4.8.1.1.2.a.4 within one hour and at least once per 8 houps thereafter. Restore both diesel genc ritor sets to OPER'3LE status within 7.f $ours or comply with the follawing:

1) De in et least U0f STANDBY within the f. ext 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months ar.d in C0'D SHuIDOW.i i;ithin the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

Vihie ino;iUF5T3Te-~fU61 storage -..... o equivalent to one inoperable diesel paerator set.

- 0ne time only exception for repair of Diesel IC - the 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months acticn stater =nt for operability of Diesel IC may be extended to a period of 9 days provide' Diesal IC is returned to OPEMBLE sta tus as soon as maintenance is completed. The provisions of specification 3.0.4 are not applicable for ibis one time change.

- - 0ae time only exception during repair of Diesel 1C - the 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months interval test is extended to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months .

FA!a_EY-UNIT 2 3/4 8-1

(bTIOil (Continu'.d) ( -(

2) One diesel generator set. n:iy be nade in:garrble for up to 14 days !

to peNorn schedalt :i n iint enance and testing en diesel gererators 1C (or 2C) provided ali the following are satisfied: -

a) Unit 1 is in MDDE 5 or 6 and appropriate technical specifica-tions covering the diesel genarator sets are satisfied.

h) Th M: ining' Unit 2 diesel generators 1-2A, 23,1C (or 2C) are Ci . it E. .

c) The service water syste:.1 is recirculated to the pond and surveillance requircaent 4.7.6.7.1 is verified prior to recoving 1C (or 2C) frau service and once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thercafter. .

d) Diesel Generator IC (or 2C) is returned to OPERABLE status as soon as uaintenance is completed.

Otherwise, be in at loast liOT STidlDBY uithin the next G hours and in COLD SHUfDu,!N within tha following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . c

c. 1.'ith one of'sj te circuit and one diesel generator s2L of the above required li.C. 8.ctrical power sources inoperable, deronstrate the OPERABILITY ci to remaining A.C. sources by perfo; aing Surveillence Nequirments 4.P. l. l.l.a and 4.8.1.1.2.a.4 vithin en: hour and at least once I:er 5"ho ~, thereaf ter; restore at least onn of the , l inoperable si_:r:ns 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 SR.EY tithin the next G hours and in COLD SHUIDOWN within th- lict.:!rg 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . Restora at least two of fsite circuits a: . 'tr diesel generator sets to OPERACLE states within 77*h:wrs f ~ ,- tir.m of initial loss or be in at least HOT Sl/GlBY within tM . ' ' hours and in COLD SHUfDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

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d. Uith t',a cf .. .:bove required of fsite /3 .E. circuits -inoperable, d ncastra h t' 0'ERABILITY of both diesel generator sets by POTforD II:;.,

'- + . } lance NequireMont 4.8.l.l.2.U.4 Within one hour and at lean ~.cn per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereaf t er, unless the diesel generators c.re e%eady operating; restore at least one or the inoperable of rtite sources 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 U?T Sl/WD3Y uithin the next G hours. With only one offsite sou-ne restored, restore both offsite circuits to OPERABLE status uitMa ~/2 hours fron tine of initial loss er be in at least fluf Sl!ML ..ithin the next G hours and in COLD SHUID0'c!M within the rollo-rica 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

Cae ticce only exception for repair of Diesel 1C - the 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months action sta te.mnt for operability of Diesel IC may be extended to a period of 9 days prcvided Diesel 1C is returned to OPERADLL' status as socn as maintenance is conpleted. The provisions of specificatien 3.0.4 are not epplicable for this one tirit chan s,e.

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- 0ne time only exception during repair of Diesel 1C - the C hour interval j test is extended to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months .

FARLEY-UMIT 2 3/4 8.-2 N

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I.yTIOR: (Continued)

e. With both of the above required diesel generator sets inoperable, i

demonstrate the OPERADIllTY of two of fsite A.C. circuits by -

performinq Surveillance Requiremant 4.81.1.1.a uithin 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 *thereafb ; restore at least one of the l inoperable diesel generator sets to OPiRABLE status uithin 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or be in at least Hof STANDBY uithin the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months ard in COLD l SHUID0'.'N uithin the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . Restore both c't esel H generator sets to OPEPABLE status within 72* hours fro : ti m of .

initial loss or be in least liOT STAMDBY uithin the ne ;t 6 hcurs and in COLD SHUTD0'<!N uithin the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

SURVEli LAUCE P,EQUIRrf!ENTS 4.8.1.'1.1 Each of tLe aboie required independent circuits between the offsite transmission network and the onsite Class 1E distribution s.s stem shall be:

a. Determined OPERABLE at least once per 7 days by verifying correct breaker alignments, indicated porter availabiliLy, and

b. Demonstrated OPEi'#LE at least once per 18 months during shutdown by trans fe r" ower sup l, from the noraal circuit to the altern2te r,i rcui t-4.C.1.1.2 Each diesel generator shall be demonstrated OPERACLE:

a. In eccot tance with the frequency specificd in Table 4.8-1 on a .

STAG 9ERED T'L tASIS by:

1. Vcrifying the fLel level in the day tank,

2. Verifying % fuel level in the fuel storage tanks,

3. Verifyirg LH fuel transfer pump can be started and transfers fuel ficn tio storage system to the day tank,

4. Verifying the die';el starts from ambient condition and acceleratc w at least 900 rp;n, for the 2850 ku generator and 514 rpm fer the 4075 ku generators, in less than or equal to 10 seconds. The generator voltage and frequency shall be 2 3952 volts and a 57 Hz within 30 seconds after the start signal.

5. Verifying the generator is synchronized, loaded to greater than or equal to its continuous rating, and operates for greater than or equal 60 minates, W0ne tiEFcT6Ty~isception for repair of Diesel IC - 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months action stateent for opere'oility of Diesel IC may be extended to a period of g days proviced -

Diesel IC is returned to 0?ERABLE il status as soon as mintenance is cowl eted. The ~ provisions of specificatica 3.0.4 are not applic.able for this one time change.

- 0ne time only exception during repair of Diesel 1C - the 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months interval test is extendid to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months .

fARLEY-UNIT 2 3/4 8-3

SAFETY EVALUATION FOR CHANGE TO THE A.C.5OURCES - OPERATION TECHNICAL SPECIFICATION I. BACKGROUND On July 30,1981 at 12:50 a.m. while perfoming surveillance tests on diesel generator 1C it was determined that the jacket cooling water had been intro-duced into four cylinders. At this time, diesel generator 1C was declared inoperable and the 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months ACTION statement was invoked. After exceeding the 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months ACTION statement, both Units 1 and 2 must be placed in HOT STANDBY. Investigations revealed that an excess of 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months will be required to return diesel generator 1C to OPERACLE status.

II. REFERENCE Technical Specification 3.3.1.1.b for Units 1 and 2.

III. BASES A. Introduction The onsite cmarg::ncy ac power supply for Units 1 and ? consists of fi.e diesel generators which supply standby power for 4160V emergency service buses F, G, H. J. K, and L of each unit. These buses provide power to the emergency loads.

The emergenc, loat are divided between the emarcancy buses of cach unit in two Ialet.ed, redundant load groups so that the failure of a redundant group does not prevent the safe shutdown of both reactors.

1he 4160V e.u ;ency buses F, H and K of each unit and their associated

loads cre designed as the redundant load group Train A.

The 4160V e.nerm :y buses G, J and L of each unit and their associated loads are designated as the redundant load group Train B.

Diesel generators 1-2A and IC are assigned to the redundant load grci.?

l Train A, uhile diesal generators 1B, 2B and 2C are assigned to the redundant load group Train li.

Diesel gen "eter 18 is uniquely assigned to Unit 1, while diesel generator 2B is unicpely assigned to Unit 2. Diesel generators 1-2A,1C and 2C are-shared between the two units. See attached FSAR Fig. 8-3.3.

The capacity of the diesel generators ensures that sufficient power vill be available to .?rovide for the functioning of required emergency leds during the worst loading situations.

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.B.

DICUSSION OF IMPACT OF LOSS OF DIESEL GENERATOR 2C i

. Table 1 delineates the. resultant loss of equipn:ent uith D.C. 3C out of service for the f ollu.iing cases: -

1. l.oss of offsite.po.nr - Units 1 and 2 ..

2. l.oss of offsi te pTser - Unit 1 .

3. Loss of offsite p:,4er - Unit 2

4. l.oss of offsite pter.- Units 1 and 2 concurrent with a loss of coolant acciu nt - Unit 1

5. l.oss' of offsite pI;er - Units 1 and 2. concurrent uith a loss of coolant acci6nt - Unit 2 G. Loss of off site p:mer and a loss of coolant eccident - Unit 1.

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. . IIonwil shutdaan on Un-it 2.

7. Loss of offsits po:ar aiid a loss of coolayt accident - Unit 2.

!!onaal shutdcda on Unit 1.

j The loss of diesel generator 1C has no iiapact on either unit for case 2, 3, 6 or 7 due to the fact that D.G.1-2A loads the essential .

busen and D.G. 1: does not pick up any emergency buses. The loss of ,

D.G.1C f or cas; 1 resolts in a loss of Train A loads for Unit 2. The loss of D.G.10 n e cases,4 or 5 results in a loss of Train A leads for Units 2 ); 1 respectively.

For the cases . '.tre there is a loss of coolant accisnt for e-ither unit, D.G.1-2A :. lips itncif to the unit uirich is undergoing a LOCA.

Iigure 3 prev n. : descripl. ion of Lie farley emergeacy electrical disi.ribu tica 1.

)n additic, & r. ns stated above for acceptability of the extensicn of the outege =: . ;,301 generator 1C, the follvaing should be noted.

The pro'abi' i t : ~ the loss of offsite power during this period is r.ot sign i ficently i . . ..ned. -

- In addition, c-ttnMye load tests have been recently completed on the -

diesel generaters providing e;ergency puder to Unit 2.

Based on the o? crating power history of the FNP 2 core, up through July 31,1981 and including eic,ht additional full power days of operation, Uestinghouse has determined that the best estimate decay heat source is less than the Appendix K curve as follows:

1. At one second - FNP 2 core is approximately 82% Appendix K.

2. At 400 seconds - FNP 2 core is approximately 76% Appendix K. s

3. At 4,000 seconds - FNP 2 core is appr oxircately 703 Appendix K.

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At increasing greater times, the Fi!P 2 core will continue to diverge from the Appendix r values. Therefore the decay heat source in the FHP 2 core, durincj the Technical Specification extension period, will be less than that assumed in the FSAR accident analysis, y In addition, Ai1bama Pouer Company proposes to demonstrate. the operability of the remaining A.C. sources by performing surveillance requirements of section 4.8.1.1.2.a.4 within one hour and at least once per 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months rather than within ena hour and at ' east once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereaf ter. Due to ex-pected tin.e required to repair diesel generator 1C, approxinately 75 starts on the remainir.n diesels would be required by Specification 4.8.1.1.2.a.4.

1he diesel 'acturer does not reco:rmend the testing frequency required during the period required to r2 pair diesel generator 1C due to potential accelerated wear. In addition, all transmission lines fending the farley

!!uclear Plant switchyard are currently operable with no interruption scheduled during this repair.

During the tira period of this Technical Specification, the frequency of testing of the four runaining diesels will be rtodified to be perforced on a staggered basis. To implement the staggered testing, plant procedures will be modified to ensure that operators are aware of such conditions while diesel lc is being repaired. SRos and Shift Technical Advisors will t

be briefed of such conditions.

As a result c' imicaant cion of ~recent Diesel Genrrator Task Force re-comendation:, S.e frequency of failures of the small diesels (lC and 2C'T have dec.renst f re.7 6 of 100 starts to 4 of 100 arts and failures of the large c% D 3 (1-2A,1B, and 2D) have decreased frou 5 of 100 starts to 2 of 100 ::.9 n since !!ay 10, 1931.

The iu:pr /a . - ir. tne failure rate of the large diesels, per R.G.l.108, allcm AK' .. t'. c the diesels every fourteen days vice 3 days, which wa' r&;ui rej ;a c-T May 10, 1981. Similarly for the small di :sels, the inproverent - c . f ailure rate vill allow Alaba:ca Power to test the small diesel: e ~ 7 seven days as soon as the failura rate reaches 3 out of 100 sta t. nsed on this data the reliability of the diesels has been significs:tly Enhanced since ilay 10,19Sl.

Based on a risk assessment performed by the !!RC on July 8,1981, the probability of core raeltdown durina a similar technical specification extention wculd be approximately 3 x 10-5 Based on the shorter ex-tensien pericd and the improved diesel reliability, such probability would be significantly lessened.

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IV. CONCLUSION -

i The proposed change to Technical Specification 3.8.1.1.b does not involve j an unreviewed safety question as defined by 10 CFR 50.59.

This one time Technical Specification change however will not significantly affect the safe operation of the Earley Nuclear Plant Units 1 and 2.

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