Text

Proposed Tech Specs 3/4.8.1, AC Sources & Associated Bases
	ML18011A193
Person / Time
Site:	Harris
Issue date:	09/28/1993
From:	; CAROLINA POWER & LIGHT CO.
To:	;
Shared Package
ML18011A192	List: ML18011A191; ML18011A193;
References
	NUDOCS 9310060371
	Download: ML18011A193 (31)
	v • d • e

ENCLOSURE TO SERIAL: HNP-93-836 ENCLOSURE 5 SHEARON HARRIS NUCLEAR POWER PLANT NRC DOCKET NO. 50-400/LICENSE NO. NPF-63 REQUEST FOR LICENSE AMENDMENT AC SOURCES - OPERATING TECHNICAL SPECIFICATION PAGES 9310060371 930928 PDR ADOCK 05000400 P PDR

EDW E S MITI G COND ON OPERAT ON 3.7.1.2 At least three independent steam generator auxiliary feedwater pumps and associated flow paths shall be OPERABLE with:

a. Two motor-driven auxiliary feedwater pumps, each capable of being powered from separate emergency buses, and

b. One steam turbine-driven auxiliary feedwater pump capable of being powered from an OPERABLE steam supply system.

QQTTON:

a. With one auxiliary feedwater pump .inoperable, restore the required feedwater pumps to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be 'uxiliary 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 HOT SHUTDOWN within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

b. With two auxiliary feedwater pumps inoperable, be in at least. HOT STANDBY within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in HOT SHUTDOWN within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

c. With three auxiliary feedwater pumps inoperable, immediately initiate corrective action to restore at least one auxilia feedwater pump to OPERABLE status as soon as possible.

5$ $ NT 4.7.1.2.1 Each auxiliary feedwater pump shall be demonstrated OPERABLE:

a. At least once per 31 days on a STAGGERED TEST BASIS by:

1. Demonstrating that'each motor-driven pump satisfies performance requirements by either:

a) Verifying each pump develops a differential pressure temperature - compensated to 70'F) is greater than or that'when equal to 1514 psid at a recirculation flow of greater than or equal to 50 gpm (25 KPPH), or b) Verifying each pump develops a differential pressure that (when temperature - compensated to 70'F) is greater than or equal to 1259 psid at a flow rate of greater than or equal to 430 gpm (215 KPPH).

SHEARON HARRIS - UNIT 1 3/4 7-4 Amendment No.

INSERT I to Page 3/4 7-4:

(NOTE: LCO 3.0.3 and all other LCO Required Actions requiring NODE changes are suspended until one AFW train is restored to OPERAHLE status. Following restoration of one AFW train, all applicable LCOs apply based on the time the LCOs initially occurred.)

3/4 ~ 8 ELECTRICAL POMER SYSTEM 3/4.8 ~ 1 A.C. SOURCES OPERATI HC LIMITIHC CONDITION fOR OPERATION 3.8.1.1 As a minimum, rhe iollouing A.C. electr cal pover sources shaLL be OPERABLE:

a ~ Tuo physically independenc circuits becueen che otfsice cransmission necuork and che onsice Class LE distribucion syscem, and

b. Tuo separate <<nd independent dieseL generators, each uirh:

A separare day cank containing a minimum of 1457 gallons oi fuel, vhich is equivalent to a minimum indicaced level oE 40X~,

2~ A separate main Euel oil storage tank containing a minimum of 100,000 gaLLons oE fueL, and

3. A separate fuel oil cransier pump.

APPLICABILITY MODES 1l 2y 3 and 4e ACTIONS

a. Mich one off ce circuic of OPERABILI oE the remaiain 3..l.a inoperable, demonscr sources performin e che urveillance C by Requir eat 4 ~ 8 ~ 1 ~ 1 ~ L.a v in 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at Lease ce per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months ther~ Eter. IE either mergency diesel generato EDC) has not 'been s Ecessfully tested xthin the 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months prec ng encry into this CTION, demonscr e its OPERABILITY by pe orming SurveiLlance Requirement 4. 1.1 ~ 2.a.4 aad a.6 sep eely Eor each such uichin 24 rs.

~

Rescore che offs'ircuit to OPERABL scacus uichia ours or be ia ac le HOT STANDBY uichin e next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months 7

d COLD SHUTDOMN vic 'he foLLouiag 30 h rs.

bi M one dieseL gene or of 3 ~ 8 ~ 1 ~ l.b ino rable, demonstrare che PERABILITY of ch .C ~ offsice source y perEorming Surveill ce Requirement 4.. ~ 1 1.a vithin 1 ho and at least once per hours thereafter d if che EDC beta'noperable due to any use ocher than pr aaned preventive Catenance or testiag, onstrace che OP LITY of the remai OPERABLE EDC perfogo' Surveillance R uirement 4 ~ 8 ~ 1 ~ 1. .4 and a.6 uithin 24 t&s*l; restore che This test 's required to be mpLeted regardLess of en the inoperable C is resc ed co OPERABILITY PAct icies thac normall support, tescing pursu c, to 4 ~ 8.1.1.2.a and a.6,,

hach vouLd render th dieseL inoperable (e. .. air roLL ), sha not be per formed Eor cestin r uired b chis ACTION catement.

~Minimum indicaced Level Mich a Euel oil specific gravicy oE 0.83 and rhe level inscrumenrarioa calibrated co a reference specific gravity oE 0.876.

SHEARON HARRIS UNIT 1 3/4 8"1 Amendment No. j8

INSERT 2 to Page 3/4 8-1:

With one offsite circuit of 3.8. 1. l.a inoperable:

Demonstrate the OPERABILITY of the remaining offsite A.C. sources by performing Surveillance Requirement 4.8. 1. l. I.a 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, and

2. Within 72 hours, restore the offsite A.C. source to OPERABLE status, 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 COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

3. In addition to the above actions, verify required feature(s) powered from the OPERABLE offsite A.C. source are OPERABLE. If required redundant feature(s) powered from the OPERABLE offsite A.C. source are inoperable or become inoperable, then restore the redundant feature(s) within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or declare the feature(s) powered from the inoperable offsite A.C. source inoperable.

INSERT 3 to Page 3/4 8-1:

With one diesel generator of 3.8. 1. I.b inoperable:

Demonstrate the OPERABILITY of the offsite A.C. sources by performing Surveillance Requirement 4.8. 1. 1. l.a,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,

2. Within 24 hours, verify that the cause of the diesel 'generator being inoperable does not affect the OPERABILITY of the remaining diesel generator or demonstrate the OPERABILITY of the remaining diesel generator by performing Surveillance Requirement 4.8. 1. 1.2.a.4*8 and a.7, and 3, Within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months , restore the diesel generator to OPERABLE status 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 .

In addition to the above actions, verify required feature(s) powered from the OPERABLE diesel generator are OPERABLE. If required redundant feature(s) powered from the OPERABLE diesel generator are inoperable or become inoperable, then restore the redundant feature(s) within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months or declare the feature(s) powered from the inoperable diesel generator inoperable.

Ei ECTRICAL POWER SYSTEMS A.C. SOURCES OPERATING LIMITING CONDITION FOR OPERATION ACTION Continued :

dfese generator to OPERAB status within 72 ours or be in a east HOT ANDBY ~ithin the lowing 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

n t 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and also ACTION d.

in aw.

LD SHUTDOWN wi n the e

C. Wth one offsft frcuit of 3.8. 1. a and one diesel nerator inoperable, d onstrate the OPE. ILITY of the rem ning A.C. sau s by perform' Surveillance Re irement 4.8.L1. . within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months nd at leas ance per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months ereafter; and if entive e EDG became i perable due any cause other n preplanned maintena e or t ing, demonstrate he OP&ABILITY ofp e remaining OP . BLE EOG by erforming Surveil ce Requirement .8.1.1.2.a.4 an .6 within 8 nours"¹; restore ne of the inape Ie sources to PERABLE status within 12 hou or be in at le t HOT STANDBY w fn the next 6 hour6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in CQ HUTDQWN within e following 30 urs. See also ACT d.

belaw. Jl store the othe .C. power sourc (affsite circuit or iesel generyNr) to OPERAB status in accords ce with the provisi s of Sp cffication 3.8. ~ ACTION a or b, 5 appropriate with e time quirement of' t ACTION based o the time of initia oss of the remaining ina>arable A.C. power ource. A successf

~ test af diesel OPERABILZT7~per Surveillance equirement 4.8.1.1..a.4 and a.6 per-formed rfder this ACTION f an OPERABLE diese or a restored OPE diesel satisfi the EDG test requ'nt of ACTION or b.

one dfesel ge ator fnoperable, n addftfon to A N b and c above, verify

1. All > quired systems, s systems, trains. mponents, and devices

~seRT 5 Ct depend on the r aining OPERABLE sel generator as a source of emergen power are also 0 LE. If these conditions are not satisf d withfn 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months e in at least HOT STANDBY within the next 6 urs and fn COLO S OWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months , except a provided for fn A ON d.2 below.

2. If n MODES 1, 2, ar and the result of the inoperable diesel e auxiliary feedwater pumps are inoperable, enerator is that immediately inf te corrective actfan to restore at least ane auxiliary fe ater pump to OPERABLE status as soon as passible.

"Thip. is required to be campleted regardless of when the fnoperable EOG is restored to OPERABILITY.

¹Actfvftfes that normally support testing pursuant to 4.8.1.1.2.a.4 which would render the diesel inaperable (e.g., air roll), shall not be performed for testing requfred by this ACTION statement.

SHEARON HARRIS - UNIT 1 3/4 8-2

INSERT 4 to Page 3/4 8-2:

With one offsite circuit and one diesel generator of 3.8. 1. 1 inoperable:

Within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , restore one of the inoperable A.C. sources to OPERABLE status 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 , and

2. Following restoration of one A.C. source (offsite circuit or diesel generator), restore the remaining inoperable A.C. source to OPERABLE status in accordance with the provisions of Specification 3.8. 1. 1 ACTION a or b, as appropriate, with the time requirement of that ACTION based on the time of initial loss of the remaining inoperable A.C. source.

INSERT 5 to Page 3/4 8-2:

With two of the required offsite A.C. sources inoperable:

Within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , restore one offsite source to OPERABLE status or be in 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 .

2. Verify required feature(s) are OPERABLE. If required feature(s) are inoperable or become inoperable, then restore the feature(s) within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months or declare the redundant feature(s) inoperable.

3. Following restoration of one offsite A.C. source, restore the remaining offsite A.C. source in accordance with the provisions of ACTION a with the time requirement of that ACTION based on the time of initial loss of the remaining inoperable A.C. source.

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INSERT 6 to Page 3/4 8-3:

e. With two of the required diesel generators inoperable:

Within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , restore one of the diesel generators to OPERABLE status 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 .

2. Following restoration of one diesel generator, restore the remaining diesel generator in accordance with the provisions of ACTION b with the time requirement of that ACTION based on the time of initial loss of the remaining inoperable diesel generator.

INSERT 7 to Page 3/4 8-3:

With three or more of the required A.C. sources inoperable:

Immediately enter Technical Specification 3.0.3.

2. Following restoration of one or more A.C. sources, restore the remaining inoperable A.C. sources in accordance with the provisions of ACTION a,b,c,d and/o'r e as applicable with the time requirement of that ACTION based on the time of loss of the remaining inoperable A.C. sources.

INSERT 8 to Page 3/4 8-3:

g. With contiguous events of either an offsite or onsite A.C. source becoming inoperable:

1. Within 6 days, restore all A.C. sources required by 3.8. 1. 1 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 .

ELECTRICAL POWER SYSTEMS A. C. SOURCH OPERATING SVRVEI LLANCE REOUIREHEHTS Conti nued) 4.8.1.1.2 Each diesel generator shall he demonstrated OPERABLE:

a. In accordance '~ith the frequency specified fn Table 4a8.1 oh a STAGGERED TEST BASIS by:

l. Yerifying the fuel level in the day tank,

2. Verifying the fuel level in the main fuel oil storage tank, 3.'erffyfng the fuel oil transfer pump can be started and transfers fuel from the storage system to the day tank, Verifying the diesel generator can start~ and accelerate to synchronous speed (450 rpm) vfth enerator volta e and f 6 00' 690 volts and 60 a 1.2 Hx, v rifyfng the enerator is synchronized, gradually loaded"" to an fndfcated 6 00-6400 kM""" and opirates for at least 60 mfnutesg dlcSel Yerffyfng the pressure in at least one air start receiver ta be greater than or equal ta 190 psig, and Yerffyfng the diesel generator fs alfgned ta provide standby p~r ta the associated emergency buses.

b. Check for and remove accumulated eater:

I. From the day tank, at least once per 3X days and aftai each operation of the diesel ~here the perfod of operatfon ~as greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months , and

2. From the main fuel oil storage tank, at least once per 31 days.

Cu By saapl fng net fuel oil in accordance with ASTM"04057-81 prior ta additfon ta storage tanks and:

1. By verifying, fn accordance fifth the tests specified in AFPf-0975-

'81 prior ta addftfon ta the storage tanks, that, the sample has:

This test shall be conducted fn accordance arith the manufacturer's recammen-dat$ uns regarding angina prsluua and sar+up pruuadurss, and as appllcaulg>

regarding loadfng recoaeendatfons.

~fs band fs meant as guidance ta avoid routine overloading of the engine.

Loads in excess of this band for special testfng or momentary variatfons wg'~e e ta chan f s ads F~ucncycon a t lwogis gh~fl nvalidate the tes f/'~"EEi Nlgagc, Eglnd mi; Ear/fh(n, l0 ~ca>na(s yi-acccl~ah'on m no-I pcaapl COndaVT'ans pg.r yMfor i-ccu~rnd4>oag~.

SHEARON HARR 5 " VH 584 h/gn

TA8 4. 8-1 DIESEL ERATOR TEST SCHEDULE NUMBER OF FAIL S NU R OF FAILURES IN IN LAST 100 LIO ST 20 VALID TESTS" TEST TEST FREOUEN Once p . 31 days 0 e per 7 days I

g~~ </+as+ ~iid 4A,ilKfks Is (gJ > riteria ror determining number of failures and valid tests shall be i ccordance with Regulatory Position C.2. e of Regulatory Guide 1.108, determined on a per diesel generator basis.

or the purposes f determining the equired test freque , the previous test failure like-new cond'ons co t may be reduced zero if a complet diesel overhaul to

>/0 is completed provided that the o rhaul including ap priate post- intenance operat' and testing, is s cifically approved y the manufa urer and jf acce le reliability ha been demonstrated.

reliabil' criterion shall e the successful c letion of 14 cons utive he tests i a single series. Ten of these tests all be in accordan e with Surve lance Requiremen 4.8. 1.1.2.a.4; four ests, in accordanc with Su illance Requirem t 4.8. 1. 1.2.e. If is criterion is no satisfied d ing the first ser es of tests, any al mate criterion to e used to v t i t. o ero uires NRC a royal.

""T e associated est frequency shall maintained until s en consecutive ailure free emands have been perf rmed and the number f failures in th last 20 val'd demands has been re ced to one.

SHEARON HARRIS - UNIT 1 3/4 8-10 ANandmenk No

INSERT 9 to Page 3/4 8-10:

TABLE 4.8-1 DIESEL GENERATOR TEST SCHEDULE NUMBER OF FAILURES IN LAST 25 VALID TESTS'" FRE(UENCY 3 31 days 7 days" (but no less than 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months )

INSERT 10 to Page 3/4 8-10:

(b) This test frequency shall be maintained until 7 consecutive failure-free tests performed in accordance with Surveillance Requirements 4.8. 1. 1.2.a.4 and a.5 have been performed. If, subsequent to the 7 failure-free tests, 1 or more additional failures occur, such that there are again 4 or more failures in the last 25 tests, the testing interval shall again be reduced as noted above and maintained until 7 consecutive failure-free tests have been performed.

3/4.8 ELECTRICAL POSER SY~c. S BASES 3/4 8. 1 3/4.8. 2 AHO 3/4. 8. 3 A. C. SOURCES 0. C. SOURCES AHO ONSITE POMER 0 ISTR IBUTION The OPERABILITY of the A.C. and O.C pawer sources and associated distHbution systems during operation ensures that sufficient po~er will be available to supply the safety-related equipment required for: (1) the safe shutdawn of the facility, and (2) the mitigation and contral of accident conditions within the facility. The minimum specified independent and redundant A.C. and O.C. power sources and distribution systems satisfy the requirements of General Design Criterion 17 of Appendix to 10 CFR Part 50.

even The switchyard is esigned using a breaker and"a-half scheme. The switchyard currently has connec~ions with the CP8L transmission net~ark; each of these transmission 1>nes is physically independent. The switchyard has ane connection with each of the two Startup Auxiliary Transformers and each SAT can be fed directly fram an associated offsite transmission line. The Startup Auxiliary Transformers are the preferred power source for the Class 1E ESP buses. The minimum alignment of offsite po~er sources will be maintained such that at least two physically independent offsite circuits 'are available. The two physi" cally independent circuits may consist of any two of the incoming transmission lines ta the SATs (either thraugh the switchyard or directly) and inta the Class 1E system. As long as there are at least two transmission lines in ser vice and two circuits through the SATs to the Class 1E buses, the LCO is met.

During MODES 5 and 6, the Class 1E buses can be energized from the offsite transmission net work via a cambinatian of the main transformers, and unit auxiliary transformers. This arrangement may be used to satisfy the require-ment of one physically independent circuit.

The .ACTION requirements specified for the levels of degradatian of the power sources provide restriction upon continued facility operation cammensurate with the level af degradation. The OPERABILITY of the power saurces are consis ent with the initial condition assumptions of the safety analyses and are based upan maintaining at least one redundant set of ansite A.C. and O.C. power sources and associated distribution systems OPERABLE during accident conditions coin-cident with an assumed lass-af-affsite power and single failure of the other onsite A.C. source. The A.C. and O.C. source allowable aut-of-service times are based on Regulatory Guide 1.93, "Availability of Electrical Power Sources, December H74. Vhen one diesel generator is inaperable, there is an additional

-ACTION requirement ta verify that 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. This requirement is intended to provide assurance that a loss-of-offsite power event will not result in a ca lete loss of safet function of critical s~tems d ing the periad one of the d esel generators is noperab e. 9FThe te~Merif, used in this context means to administratively check by examining logs or o er information ta deter-mine if certain camponents are out"af-service for maintenance or other reasons.

It does not mean to perform the Surveillance Requirements needed to demonstrate the OPERABILITY of the component.

SHEARON HARRIS - UNIT 1 B 3/4 8-1 /yond s~nI h/o.

INSERT ll to Page B 3/4 8-1:

Required feature(s) are those systems, subsystems, or components that require emergency power to safely shut down the plant and maintain it in a safe shutdown condition in conjunction with a loss of offsite power. Thus, there are action requirements to declare required feature(s) receiving power from either an inoperable offsite source or onsite source (Emergency Diesel Generator) as inoperable when the required redundant feature(s) are inoperable. In addition, these requirements allow a period of time for evaluation and/or performance of repairs to restore OPERABILITY. The system, subsystem, and/or component requiring verification of OPERABILITY is limited to those having a 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or less limiting condition for OPERABILITY since continued plant operation is limited to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months with either an inoperable offsite or onsite emergency A.C. power source. When a diesel generator becomes inoperable, there is a requirement to either verify that the cause of inoperability does not impact the OPERABILITY of the OPERABLE diesel generator or performance of surveillance requirements per applicable section of Technical Specification 4.8. 1. 1.2. Examples of conditions that would not impact the OPERABILITY of the OPERABLE diesel generator are, but not limited to:

Voluntary removal from service of an offsite or onsite Emergency A.C.

power source required component, sub-system or system for performance of pre-planned maintenance or testing; or

2. Performance of maintenance or testing on an offsite or onsite Emergency A.C. power source sub-system or component that is not required for performance of its intended safety function; or

3. Discovery of a condition during performance of pre-planned maintenance or testing that would not have resulted in the inability of the emergency A.C. power source to perform its intended safety function, or Performance of maintenance or testing on a plant support system (for example, Emergency Service Water System), sub-system (for example, diesel generator room exhaust fan, etc.) or component when OPERABILITY of the system, sub-system or component can be independently demonstrated.

ELECTRICAL POWER SYSTBIS BASES A.C. SOURCES 0.C. SOURCES AMO OHSITE POWER OISTRIBUTIOH Continue'd The OPERABILITY of the minimum specified A.C. and O.C. pawer sources and asso-ciated distribution systems du~ing shutdown and refueling ensures that: (1) the facility can be maintained in the shutdown or refueling condition for extended time periods, and (2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.

The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are based upon the recommendations of Regulatory Guides 1.9, "Selec-tion of Oiesel Generator Set Capacity far Standby Power Supplies," Oecember 1979; 1.108, "Periodic Testing of Oiese> Generator.Units Used as Onsite Electric Power Systems at Huclear Power Plants," Revision 1, August 1977 as modified in accor dance with the guidance of IE Hotice 85-32, April 22, 1985; and 1.137, "Fuel-Oil Systems for Standby Oiesel Generators," Revision 1, October 1979. The inclusion of the loss of generator potential= transformer circuit lockout trip is a design feature based upon coincident logic and is an anticipatory trip prior to diesel erspeed.

XASM I iQ he urvei lance Requirement for demons rating the OPERABILITY of the station bat eries are based on the recammendations of Regulatory Guide 1.129, "Mainte-nance Testing and Replacement of Large Lead Starage Batteries for Huclear Power Plants," February 1978, and IEEE Std 450-1980, "IEEE Recommended Practice far maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations."

Veri fying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage on float charge, connec.ion resistance values, and the performance of battery service and discharge tests ensures the effectiveness of the charging system, the ability ta 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 Iow value, is characteristic of a charged cell with adequate capacity. The normal limits for each connected caII for flaat 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'll the connected cells not more than 0.010 below the manufacturer's full charge specific gravity, ensures the OPERABILITY and capability of the battery.

Operation with a battery cell's parameter outside the normal limit but within the allowable. value specified in Table 4.8-2 is permitted for up ta 7 days.

Ouring this,7-day period: (1) the allowable values for electrolyte level ensures no physical damage to the plates with an adequate electron transfer capability; (2) the allowable value for the average specific gravity of all the cells, not SHEAROH HARRIS UHIT 1 B. 3/4 8-2 ANu)Jnwns il/a

~ p INSERT 12 to Page 8 3/4 8-2:

Table 4.8-1, Diesel Generator Test Schedule, allows each DG to be tested on a staggered test basis at a maximum interval of every 31 days when the number of valid failures in the last 25 valid tests on each DG as defined by Regulatory Guide 1. 108 is 3 or. less. The test schedule requires the frequency of testing be reduced to an interval of no less than 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months nor more than the 7 days when either DG has experienced 4 or more valid failures in the last 25 tests.

Furthermore, this schedule requires the reduced time frequency to be maintained until completion of 7 consecutive valid tests. In addition, should any operation of the diesel generator result in a valid failure as defined in Regulatory Guide 1. 108 during the reduced test frequency period and the number of valid failures is 4 or more, testing at the reduced frequency interval shall continue until completion of 7 valid failure-free tests. This test schedule implements the recommendations of Generic Letter 84-15, NUREG/CR-5057 (Recommended Practice for Aging Mitigation and Improved Programs for Nuclear Service Diesel Generators) and NUMARC 87-00, Rev. 1, Appendix D (EDG Reliability Program) that with three or less valid failures on a per DG basis ther e is reasonable assurance that the onsite A.C. source reliability is above a threshold of 0.95. Should more than 3 valid failures occur within the last 25 valid tests, then there is probable cause that DG degradation may have occurred and the failure events are not due to a series of random events.

Reducing the test frequency provides for timely accumulation of data. The requirement to complete 7 valid tests provides reasonable assurance that the corrective action(s) taken were appropriate and DG reliability is restored to a level that allows return to a 31 day or less interval test schedule.

PLANT SYSTEMS AUXILIARY FEEDWATER SYSTEM LIMITING CONDITION FOR OPERATION 3.7. 1.2 At least three independent steam generator auxiliary feedwater pumps and associated flow paths shall be OPERABLE with:

a. Two motor-driven auxiliary feedwater pumps, each capable of being powered from separate emergency buses, and

b. One steam turbine-driven auxiliary feedwater pump capable of being powered from an OPERABLE steam supply system.

APPLICABILITY: MODES 1, 2, and 3.

ACTION:

a ~ With one auxiliary feedwater pump inoperable, restore the required auxiliary feedwater pumps 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 HOT SHUTDOWN within the following 6 hours.

b. With two auxiliary feedwater pumps inoperable, be in at least HOT STANDBY within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in HOT SHUTDOWN within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

C. With three auxiliary feedwater pumps inoperable, immediately initiate corrective action to restore at least one auxiliary feedwater pump to OPERABLE status as soon as possible. (NOTE:

LCO 3.0.3 and all other LCO Required Actions requiring MODE changes are suspended until one AFW train is restored to OPERABLE status. Following restoration of one AFW train, all applicable LCOs apply based on the time the LCOs initially occurred.)

SURVEILLANCE RE(UIREMENTS 4.7. 1.2. 1 Each auxiliary feedwater pump shall be demonstrated OPERABLE:

a ~ At least once per 31 days on a STAGGERED TEST BASIS by:

Demonstrating that each motor-driven pump satisfies performance requirements by either:

a) Verifying each pump develops a differential pressure that (when temperature - compensated to 70'F) is greater than or equal to 1514 psid at a recirculation flow of greater than or equal to 50 gpm (25 KPPH), or b) Verifying each pump develops a differential pressure that '(when temperature - compensated to 70'F) is greater than or equal to 1259 psid at a flow rate of greater than or equal to 430 gpm (215 KPPH).

SHEARON HARRIS - UNIT 1 3/4 7-4 Amendment No.

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3 4.8 ELECTRICAL P 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. A separate day tank containing a minimum of 1457 gallons of fuel, which is equivalent to a minimum indicated level of 4 00/**

2. A separate main fuel oil storage tank containing a minimum of 100,000 gallons of fuel, and

3. A separate fuel oil transfer pump.

APPLICABILITY: NODES 1, 2, 3 and 4.

ACTION:

a. With one offsite circuit of 3.8.1.1.a inoperable:

Demonstrate the OPERABILITY of the remaining offsite A.C. sources by performing Surveillance Requirement 4.8. 1. 1. I.a 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, and

2. Within 72 hours, restore the offsite A.C. source to OPERABLE status, 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 COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

3. In addition to the above actions, verify required feature(s) powered from the OPERABLE offsite A.C. source are OPERABLE. If required redundant feature(s) powered from the OPERABLE offsite A.C. source are inoperable or become inoperable,'then restore the redundant feature(s) within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or declare the feature(s) powered from the inoperable offsite A.C. source inoperable.

- Minimum indicated level with a fuel oil specific gravity of 0.83 and the level instrumentation calibrated to a reference specific gravity of 0.876.

SHEARON HARRIS - UNIT 1 3/4 8-1 Amendment No.

C..

ELECTRICAL POWER SY S A.C. SOURCES OPERATING LIMITING CONDITION FOR OPERATION ACTION Continued :

b. With one diesel generator of 3.8. l. l.b inoperable:

1. Demonstrate the OPERABILITY of the offsite A.C. sources by performing Surveillance Requirement 4.8. 1. 1. l.a 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,

2. Within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , verify that the cause of the diesel generator being inoperable does not affect the OPERABILITY of the remaining diesel generator or demonstrate the OPERABILITY of the remaining diesel generator by performing Surveillance Requirement 4.8. 1. 1.2.a.4*8 and a.7, and

3. Within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months , restore the diesel generator to OPERABLE status 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 .

4, In addition to the above actions, verify required feature(s) powered from the OPERABLE diesel generator are OPERABLE. If required redundant feature(s) powered from the OPERABLE diesel generator are inoperable or become inoperable, then restore the redundant feature(s) within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months or declare the feature(s) powered from the inoperable diesel generator inoperable.

C. With one offsite circuit and one diesel generator of 3.8. 1. 1 inoperable:

1. Within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , restore one of the inoperable A.C, sources to OPERABLE status 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 , and

2. Following restoration of one A.C. source (offsite circuit or diesel generator), restore the remaining inoperable A.C. source to OPERABLE status in accordance with the provisions of Specification 3.8. 1. 1 ACTION a or b, as appropriate, with the time requirement of that ACTION based on the time of initial loss of the remaining inoperable A.C. source.

d. With two of the required offsite A.C. sources inoperable:

1. Within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , restore one offsite source to OPERABLE status or be in 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 .

This is required to be completed regardless of when the inoperable EDG is restored to OPERABILITY.

OActivities that normally support testing pursuant to 4.8. 1. 1.2.a.4, which would render the diesel inoperable (e.g., air roll), shall not be performed for testing required by this ACTION statement.

SHEARON HARRIS - UNIT 1 3/4 8-2 Amendment No.

+~

EL CTRICAL POWER SY S A.C. SOURCES OPERATING LIMITING CONDITION FOR OPERATION ACTION Continued :

2. Verify required feature(s) are OPERABLE. If required feature{s}

are inoperable or become inoperable, then restore the feature(s) within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months or declare the redundant feature(s) inoperable.

3. Following restoration of one offsite A.C. source, restore the remaining offsite A.C. source in accordance with the provisions of ACTION a with the time requirement of that ACTION based on the time of initial loss of the remaining inoperable A.C. source.

e. With two of the required diesel generators inoperable:

1. Within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , restore one of the diesel generators to OPERABLE status 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 .

2. Following restoration of one diesel generator, restore the remaining diesel generator in accordance with the provisions of ACTION b with the time requirement of that ACTION based on the time of initial loss of the remaining inoperable diesel generator.

With three or more of the required A.C. sources inoperable:

l. Immediately enter Technical Specification 3.0.3.

2. Following restoration of one or more A.C. sources, restore the remaining inoperable A.C. sources in accordance with the provisions of ACTION a b c,d and/or e as applicable with the time requirement of that AC)IPN based on the time of loss of the remaining inoperable A.C. sources.

With contiguous events of either an offsite or onsite A.C. source becoming inoperable:

1. 'ithin 6 in at least days, restore all A.C. sources required by 3.8. 1. 1 or HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD be SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

SURVEILLANCE RE(UIREMENTS 4.8. 1. 1. 1 Each of the above required physically independent circuits between the offsite transmission network and the onsite Class lE distribution system shall be:

'a ~ Determined OPERABLE at least once per 7 days by verifying correct breaker alignment and power availability, and

b. Demonstrated OPERABLE at least once per 18 months by manually transferring the onsite Class 1E power supply from the unit auxiliary transformer to the startup auxiliary transformer.

SHEARON HARRIS - UNIT 1 3/4 8-3 Amendment No.

.4 4

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~ <<1 1 ELECTRICAL POWER SY S A.C. SOURCES OPERATING SURVEILLANCE REQUIREMENTS (Continued) 4.8. 1. 1.2 Each diesel generator shall be demonstrated OPERABLE:

'a ~ In accordance with the frequency specified in Table 4.8. 1 on a STAGGERED TEST BASIS by.

l. Verifying the fuel level in the day tank,

2. Verifying the fuel level in the main fuel oil storage tank,

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

4. Verifying the diesel generator can start** and accelerate ¹¹ to synchronous speed (450 rpm) with generator voltage and frequency 6900 z 690 volts and 60 z 1.2 Hz,

5. Verifying the diesel generator is synchronized, gradually loaded** to an indicated 6200-6400 kW*** and operates for at least 60 minutes,

6. Verifying the pressure in at least one air start receiver to be greater than or equal to 190 psig, and

7. Verifying the diesel generator is aligned to provide standby power to the associated emergency buses.

b. Check for and remove accumulated water:

1. From the day tank, at least once per 31 days and after each operation of the diesel where the period of operation was greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months , and

2. From the main fuel oil storage tank, at least once per 31 days.

c ~ By sampling new fuel oil in accordance with ASTH-D4057-81 prior to addition to storage tanks and:

1. By verifying, in accordance with the tests specified in ASTH-D975-81 prior to addition to the storage tanks, that the sample has:

- This test shall be conducted in accordance with the manufacturer's recommendations regarding engine prelube and warmup procedures, and as applicable, regarding loading recommendations.

- - This band is meant as guidance to avoid routine overloading of the engine, Loads in excess of this band for special testing or momentary variations due to changing bus loads shall not invalidate the test.

¹¹The voltage and frequency conditions shall be met within 10 seconds or by gradual acceleration to no-load conditions per vendor recommendations.

SHEARON HARRIS - UNIT 1 3/4 8-4 Amendment No.

TABLE 4.8-1 DIESEL GENERATOR TEST SCHEDULE NUMBER OF FAILURES IN LAST 25 VALID TESTS FRE UENCY 3 31 days 7 days" (but no less than 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months )

Criteria for determining number of failures and valid tests shall be in accordance with Regulatory Position C.2.e of Regulatory Guide 1. 108, Revision 2, where the number of tests and failures is determined on a per diesel generator basis.

This test frequency shall be maintained until 7 consecutive failure-free tests performed in accordance with Surveillance Requirements 4.8. 1. 1.2.a.4 and a.5 have been performed. If, subsequent to the 7 arefailure-free tests, 1 or more additional failures occur, such that there again 4 or more failures in the last 25 tests, the testing interval shall again be reduced as noted above and maintained until 7 consecutive failure-free tests have been performed.

SHEARON HARRIS - UNIT 1 3/4 8-10 Amendment No.

~ 4, ~

c .+34.8 ELECTRICAL P SYSTEMS BASES 3 4.8. 1 3 4.8.2 AND 3 4.8.3 A.C. SOURCES D.C. SOURCES AND ONSITE POWER DSRBU 0 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 independent and redundant A.C. and D.C.

ower sources and distribution systems satisfy the requirements of General esign Criterion 17 of Appendix A to 10 CFR Part 50.

The switchyard is designed using a breaker-and-a-half scheme. The switchyard currently has seven connections with the CP&L transmission network; each of these transmission lines is physically independent. The switchyard has one connection with each of the two Startup Auxiliary Transformers and each SAT can be fed directly from an associated offsite transmission line. The Startup Auxiliary Transformers are the preferred power source for the Class 1E ESF buses. The minimum alignment of offsite power sources will be maintained such that at least two physically independent offsite circuits are available. The two physically independent circuits may consist of any two of the incoming transmission lines to the SATs (either through the switchyard or directly) and into the Class 1E system. As long as there are at least two transmission lines in service and two circuits through the SATs to the Class 1E buses, the LCO is met.

During MODES 5 and 6, the Class lE buses can be energized from the offsite transmission net work via a combination of the main transformers, and unit auxiliary transformers. This arrangement may be used to satisfy the requirement of one physically independent circuit.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the level of degradation. The OPERABILITY of the power sources are consistent with the initial condition assumptions of the safety analyses and are based upon maintaining at least one redundant set of 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. The A.C. and D.C. source allowable out-of-service times are based on Regulatory Guide 1.93, "Availability of Electrical Power Sources," December 1974. When one diesel generator is inoperable, there is an additional ACTION requirement to verify that 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. This requirement is intended to provide assurance that a loss-of-offsite power event will not result in a complete loss of safety function of critical systems during the period one of the diesel generators is inoperable. Required feature(s) are those systems, subsystems, or components that require emergency power to safely shut down the plant and maintain it in a safe shutdown condition in conjunction with a loss of offsite power. Thus, there are action requirements to declare required feature(s) receiving power from either an inoperable offsite source or onsite source (Emergency Diesel Generator) as inoperable when the required redundant feature(s) are SHEARON HARRIS - UNIT 1 B 3/4 8-1 Amendment No.

~ 4 0

, E)ECTRICAL POWER SY S BASES (Continued)

A.C. SOURCES D.C. SOURCES AND ONSITE POWER DISTRIBUTION Continued inoperable. In addition, these requirements allow a period of time for evaluation and/or performance of repairs to restore OPERABILITY. The system, subsystem, and/or component requiring verification of OPERABILITY is limited to those having a 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or less limiting condition for OPERABILITY since continued plant operation is limited to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months with either an inoperable offsite or onsite emergency A.C. power source. When a diesel generator becomes inoperable, there is a requirement to either verify that th'e cause of inoperability does not impact the OPERABILITY of the OPERABLE diesel generator or performance of surveillance requirements per applicable section of Technical Specification 4.8. 1. 1.2. Examples of conditions that would not impact the OPERABILITY of the OPERABLE diesel generator are, but not limited to:

1. Voluntary removal from service of an offsite or onsite Emergency A.C.

power source required component, sub-system or system for performance of pre-planned maintenance or testing; or

2. Performance of maintenance or testing on an offsite or onsite Emergency A.C. power source sub-system or component that is not required for performance of its intended safety function; or

3. Discovery of a condition during performance of pre-planned maintenance or testing that would not have resulted in the inability of the emergency A.C. power source to perform its intended safety function, or

4. Performance of maintenance or testing on a plant support system (for example, Emergency Service Water System), sub-system (for example, diesel generator room exhaust fan, etc.) or component when OPERABILITY of the system, sub-system or component can be independently demonstrated.

The term "verify" as used in this context means to administratively check by examining logs or other information to determine if certain components are out-of-service for maintenance or other reasons. It does not mean to perform the Surveillance Requirements needed to demonstrate the OPERABILITY of the component.

The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution systems during shutdown'nd refuelinq ensures that:

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

The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are based upon the recommendations of Regulatory Guides 1.9, Selection of Diesel Generator Set Capacity for Standby Power Supplies,"

December 1979; 1. 108, "Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1, August 1977 as modified in accordance with the guidance of IE Notice 85-32, April 22, 1985; and 1. 137, "Fuel-Oil Systems for Standby Diesel Generators," Revision 1, October 1979. The inclusion of the loss of generator potential transformer circuit lockout trip is a design feature based upon coincident logic and is an anticipatory trip prior to diesel generator overspeed.

SHEARON HARRIS - UNIT 1 B 3/4 8-2 Amendment No.

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0

., EiECTRICAL POWER SY S BASES A.C. SOURCES D.C. SOURCES AND ONSITE POWER DISTRIBUTION Continued Table 4.8-1, Diesel Generator Test Schedule, allows each DG to be tested on a staggered test basis at a maximum interval of every 31 days when the number of valid failures in the last 25 valid tests on each DG as defined by Regulatory Guide 1. 108 is 3 or less. The test schedule requires the frequency of testing be reduced to an interval of no less than 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months nor more than the 7 days when either DG has experienced 4 or more valid failures in the last 25 tests.

Furthermore, this schedule requires the reduced time frequency to be maintained until completion of 7 consecutive valid tests. In addition, should any operation of the diesel generator result in a valid failure as defined in Regulatory Guide 1. 108 during the reduced test frequency period and the number of valid failures is 4 or more, testing at the reduced frequency interval shall continue until completion of 7 valid failure-free tests. This test schedule implements the recommendations of Generic Letter 84-15, NUREG/CR-5057 Recommended Practice for Aging Mitigation and Improved Programs for Nuclear ervice Diesel Generators) and NUMARC 87-00, Rev. 1, Appendix D (EDG Reliability Program) that with three or less valid failures on a per DG basis there is reasonable assurance that the onsite A.C. source reliabi ity is above a threshold of 0.95. Should more than 3 valid failures occur within the last 25 valid tests then there is probable cause that DG degradation may have occurred and tie failure ev'ents are not due to a series of random events.

Reducing the test frequency provides for timely accumulation of data. The requirement to complete 7 valid tests provides reasonable assurance that the corrective action(s) taken were appropriate and DG reliability is restored to a level that allows return to a 31 day or less interval test schedule.

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

" IEEE Recommended Nuclear Power Plants," February 1978, and IEEE Std 450-1980, 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.

Operation with a battery cell's parameter outside the normal limit but within the allowable value specified in Table 4.8-2 is permitted for up to 7 days. During this 7-day period: (1) the allowable values for electrolyte'evel ensures no physical damage to the plates with an adequate electron transfer capability; (2) the allowable value for the average specific gravity of all the cells, not SHEARON HARRIS - UNIT 1 B 3/4 8-3 Amendment No.

.-,E)ECTRICAL POWER SY S BASES A.C. SOURCES D.C. SOURCES AND ONSITE POWER DISTRIBUTION Continued more than,0.020 below the manufacturer's recommended full charge specific gravity, ensures that the decrease in rating will be less than the safety margin provided in sizing; (3) the allowable value for an individual cell's specific gravity, ensures that an individual cell's specific gravity will not be more than 0.040 below the manufacturer's full charge specific gravity and that the overall capability of the battery will be maintained within an acceptable limit; and (4) the allowable value for an individual cell's float voltage, greater than 2.07 volts, ensures the battery's capability to perform its design function.

3 4.8.4 ELECTRICAL E UIPMENT PROTECTIVE DEVICES Containment electrical penetrations and penetration conductors are protected by either deenergizing circuits not required during reactor operation or by demonstrating the OPERABILITY of primary and backup overcurrent protection circuit breakers during periodic surveillance.

The Surveillance Requirements applicable to lower voltage circuit breakers provide assurance of breaker reliability by testing at least one representative sample of each manufacturer's brand of circuit breaker. Each manufacturer's molded case and metal case circuit breakers are grouped into representative samples which are then tested on a rotatinq basis to ensure that all breakers are tested. If a wide variety exists within any manufacturer's brand of circuit .breakers, it is necessary to divide that manufacturer's breakers into groups and treat each group as a separate type of breaker for surveillance purposes.

The bypassing of the motor-operated valves thermal overload protection during accident conditions by integral bypass devices ensures that safety-related valves will not be prevented from performing their function. The Surveillance Requirements for demonstrating the bypassing of the thermal overload protection during accident conditions are in accordance with Regulatory Guide 1. 106, "Thermal Overload Protection for Electric Motors on Motor Operated Valves," Revision 1, March 1977.

SHEARON HARRIS - UNIT 1 B 3/4 8-4 Amendment No.

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