Text

Proposed Tech Specs Incorporating Both Steady State & Transient Degraded Voltage Setpoints Into Tss,As Opposed to Current Single Degraded Voltage Setpoint
	ML20217K667
Person / Time
Site:	Calvert Cliffs
Issue date:	10/22/1997
From:	; BALTIMORE GAS & ELECTRIC CO.
To:	;
Shared Package
ML20217K663	List: ML20217K659; ML20217K667;
References
	NUDOCS 9710280366
	Download: ML20217K667 (20)
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. ._ . _ _ . . . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ . _ _ _ _ . . __

i NrTACllMENT (3) 4 CURRENT UNIT 1 TECilNICAL SPECIFICATION MARKED-UP PAGES 4

3/4 3-12 3/4 3-17

! 3/4 3-21 3/48-4 i

9710280366 971022 PDR ADOCK 05000317 P PDR Haltimore Gas & Electric Company Do'.ket Nos. 50-317 and 50 318 October 22,1997 l l

g TABLE 3.3-3 (Continued)

G 'R g ENGINEERED SAFETY FEATURE ACTUATION SYSTEM INSTRUMENTATION w

E ==

q

TOTAL NO. CNANNELS CNANNELS APPLICABLE 5*

FUNCTIONAL UNIT OF CHANNELS TO TRIP OPERABLE MODES ACTION !

=

c 6. CONTAINMENT PURGE VALVES 5 ISOLATION y

" d

~

a. Manual (Purge Valve Control 2/Pnetration E 1/ Penetration 2/ Penetration 6** 8 Switches)

b. Cor.tainment Radiation -

High Area Monitor 4 2 3 6** 8 R^

7. LOSS OF POWER

a. 4.16 kv Emergency Bus 4/ Bus 2/ Bus Undervoltage (Loss of 3/ Bus 1, 2, 3 7' Voltage)

b. 4.16 ky Emerge 2cy Bus _J 4/ Bus 2/ Bus Undervoltage (I'egraded 3/ Bus I, 2, 3 7' Voltage) y

=

h us ~% fy 9[ao #/ac 3/gg 1,43 [

o C.Shte.bqc.2cdWI 24 8 L l'-v f**'0{M '

s

~~ %

u

g TABLE 3.3-4 (Continued) w ENGINEERED SAFETY FEATURE ACTUATION SYSTEM INSTRUMEPTATION TRIP VALUES b FUNCTIONAL UNIT TRIP SETPOINT ALLOM4BLE VALUES 4

w "'

. 5. CONTAD#0T SUMP RECIRCULATION (RAS)

E e E 5 a. Manual RAS (Trip Buttons) Not Applicable 5

Not Applicable d

~

b, Refueling Water Tank - Lcw E l 2 24 inches above tank i 24 inches above tank i bottom bottom

6. CONTAINMENT PURGE VALVES ISOLATION

a. Manual (PURGE Valve Control Not Applicable Not Applicable g Switches)

3. Containment Radiation - High Area 5 220 mr/hr O Monitor 1 220 mr/hr

7. LOSS OF POWER

a. 4.16 kv Emergency Bus Undervoltage 2450 1 105 volts with a (Loss of Voltage) 2450 1 105 volts with a 2 $ 0.2 d time celay 2 + 0.2 second time delay 34so 71 o

(

L

b. p';gn:cd

-J Y:H;;5)ky Emeroency Bus Undervoltage

~

81 olts with a

.4 second time delay M_ olts with a 81 .4 second time delay (rrass:e.t Deyade& de% e)

E

- V+

3100 2 to

u ", ' ,,o. in - v. ~

C, Y l(a kt t%eyay B n un dervo ka y f ,~ u .,

u (sw wacpu v.my) wdun De-c 'M u W

^

x - -

L__

l l

l g TABLE 4.3-2 (Continued) w G

g ENGINEERED SAFETY FEATURE ACTUATION SYSTEM INSTRIPENTATION SURVEILLA:4CE REQUIREMENTS w n E C CHANNEL MODES IN intICH $

q Cit".NNEL CHANNEL FUNCTIONAL SURYEILLANCE E

FUNCTIONAL UNIT CHECK CALIBRATION TEST REQUIRED M c 'I 5 7. LOSS OF POWER d

~ E

a. 4.16 kv Emergency Bus Undervoltage NA REFUELING Q 1, 2, 3 (Loss of Voltage) INTERVAL

b. gr " r m Rrre 13dervolt-ce W REFUELING Q 1, 2, 3

'Isi ta INTERVAL

8. CCVCS ISOLATION West Penetration Room / Letdown NA REFUELING Q 1, 2, 3, 4

" Heat Exchanger Room Pressure - High INTERYAL U

9. AUXILIARY FEEDWATEE N3 N a. Manual (Trip Buttons) NA NA REFDELING NA INTERYAL I

b. Steam Generator Level - Low S REFUELING Q 1, 2, 3 INTERYAL k

=>

c. Steam Generator AP - High S REFUELING INTERVAL Q 1, 2, 3 i

W k d. Automatic Actuation Logic NA NA Q 1, 2, 3 f

E

,E } T .

ro

~

C. 4.IG kv E-<pn 3 Gus U*deml%<N}g AYj;fe?L 9 A I (3%q sua oc3 rood VoI+=y) 1 , - -

)

i

_ _ _ _ _ _____-_--_- - - - - - ~

3/4.8 R ECTRICAL POWER SYSTEMS SURVE!LLANCE REQUIREMENTS 4.8.1.1.1 Each recuired independent circuit between the offsite transmission network and the onsite Class 1E Distribution System shall bei

a. Demonstrated OPERABLE, as follows:

1.

For each 500 kV offsite circuit, at least once per 7 days by verifying correct breaker alignments and indicated power availability.

2. For the 69 kV SMECO offsite power circuit, within one hour of substitution for a 500 kV offsite power circuit, and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter dur.ing use by verifying correct breaker alignments and indicated power availability: and b.

Demonstrated OPERABLE at least once per REFUELING INTERVAL during shutdown by manually transferring unit power supply from the nomal circuit to the alternate circuit.

4.8.1.1.2 Each diesel generator shall be demonstrated OPERABLE:

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

1. Verifying the fuel level in the day fuel tank.

2. Verifying the fuel level in the fuel storage tank.

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

4. Verifying the diesel stA and achieves a generator voltage and frequency,of 416 volts and 60 1 1.2 Hz, respectively. l 4.140(80

5. Verifying the genera yn ronized, loaded to > 4000 kW 7 for No. lA Emergency Diesel Generator or > 2250 kW Tor No.1B %

EmergencyDieselGenerator,andoperatesTor160 minutes.

6. Verifying the diesel generator is aligned to provide stancy power to the associated emergency busses.

7. Verifying that the automatic load sequencer timer is OPERABLE with designtheinterval.

interval between each load block within i 10% of its All engine starts for the purpose of this Surveillance Requirement may be preceded by an engine prelube period and/or other wamup procedures recomended by the manufacturer so that mechanical wear and stress on the diesel engine is minimized.

CALVERT CLIFFS - UNIT 1 3/4 8-4 Amendment No. 214

AITACllMENT_(d)

CURRENT UNIT 2 l TECilNICAL SPECIFICATION MARKED-UP PAGES 3/4 3-12 3/4 3-17 3/4 3-21 3/48-4 i

Baltimore Gas & Electric Company Docket Nos. 50-317 and 50 318 October 22,1997

.~ !

g r- TABLE 3.3-3 (Continued) 'y r' a ,

l ENGINEERED SAFETY FEATURE ACTUATION SYTTEM INSTRL?tENTATION 'w o

C MINIMUM g TOTAL NO. CHANNELS CHANNELS FUNCTIONAL UNIT APPLICABLE O

] OF CHANNELS TO TRIP OPERABLE MCDES ACTION e 6. CONTAINMENT PURGE VAll 3 E" c ISOLATION g 2

s w

" a. Manual (Purge Yalve Control 1/ valve 1/ valve

- Switches) 1/ valve 6** 8 g E

b. Containment Radiation - High Area Monitor 4 2 3 6** 8 g 7. LOSS OF POWER

a. 4.16 ky Emergency Bus 4/ Bus 2/ Bus 3/ Bus I, 2, 3 7*

M Undervoltage (Loss of Voltage)

b. 4.16 kv Emergency Bus 4/ Bus 2/ Bus 3/ Bus I, 2, 3 7*

Undervoltage (Degraded .

Voltage) -

T* * *."Y -

G W V Y

$ . Bus '

$ 'I.tG kv Eeery g ke $8vs Y6~1 I 2, 3 'l 4

~ S 3} Gas i g

u.s., val e +=y)l 5+ehe

+,heDqcch S ( 4 x /

~~

I,

I g TABLE 3.3-4 (Continued) y ENGINEERED SAFETY FEATURE ACTUATION SYSTDI INSTRUMENTATION TRIP VALUES b FUNCTIONAL UNIT TRIP SETPOINT ALLOM48tE VALUES

?

Li E X

. 5. CONTAL9fENT SUMP RECIRCULATION (RAS) E c 5

a. Manual RAS (Trip Buttons) Not Applicable Not Applicable -*

b. Refueling Water Tank - Low 124 inches above tar.k 1 24 inches above tank bottom bottom

6. CONTAINMENT PURGE VALVES ISOLATION

a. Manual (Purge Valve Control Not Applicable Not Applicable y Switches) i' b. Containment Radiation - Hfgh < 220 n:r/hr < 220 mr/hr t Area Monitor

7. LOSS OF POWER

a. 4.16 kv Emergency Bus Undervoltage 2450 1 105 volts with a 2450 1 105 volts with a (Loss of Voltage) 2 + 0.2 s nd time delay time delay 3 11 10 3380

b. 4.16 kv Emergency Bus Undervoltage -3620_h olts with a olts with a E ded Voltage) 8+ -

.4 second time delay 8 + 0.4 second time delay E f -

a Troosi c.+ -

N c

3'c# #Ev *!+' 4 ' %

4 ,c g, an us ~.I+ye 31w 2 to ve I+r ~&

(ga, sde,byJ e/ */+yd 5 io: 2 3. 7 s a o- d +'~ e My sat hna / *~St .

L A x s 3 Y j

y. -

9 -

TABLE 4.3-2 (Continued) c G 2 g EMINERED SAFETY FEATURE ACTUATIM SYSTEM INSTRiptarTATION SURVEIs ramry N

w b CM NODES IN WICE a

" C==a CmMn rMCn.Nat 5.NE1 ia.rr -

FMCTIONAL UNIT c-CNECK CALIBRATIM TEST _ REQUIRED k

=

5 7. LOSS OF POWER C

d

" a

a. 4.16 kv Emergency Bus Undervoltage NA REFUELIM 1, 2, 3 (Loss of Voltage) Q INTENAL

b. 4.16 ky Emergncy Bue rvoltage NA REFUELIM Q 1, 2, 3 (Degraded "oltage % Jggt. INTENAL 8.#CYCS 'ISCl *.~I6N I R

West Penetration Room / Letdown MA REfBELIM Q 1, 2, 3, 4 i Heat Exchanger Room Pressure - High INTENAL

{

~

(

9. AUXILIARY FEEDWATER

) a. Manual (Trip Buttons) NA E REFUELING M INTE NAL

b. Steam Generator Level - Low S REFUELING 1, 2, 3

- Q INTENAL k

=>

c. Steam Generator AP - High 5 REFUELING Q 1, 2, 3 INTENAL

$ d. Automatic Actuation Logic NA NA QN I,2,3 v v N

.c -

G Rgrueygg.

C. 4.IL Kv Emeryney % underrol+ y N/A ' '

2~~"x (s+e. y su +e bra vouy) 1 - x

t 3/4.8 ILECTRICAL POWER SvSTEMS -

SURVE!LLANCE REQUIREMENTS (Continued)

2. For the 69 kV SHECO offsite power circuit within one hour of substitutionfora500kVoffsitepowercircuit,andatleast once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter during use by verifying correct breaker alignments and indicated power availability; and

b. Demonstrated OPERABLE at least once per REFUELING INTERVAL during shutdown by manually transferring unit power supply from t'e nomal circuit to the alternate circuit.

4.8.1.1.2 Each diesel generator shall be demonstrated CPERABLE:

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

1. Verifying the fuel level in the day fuel tank.

2. Yorifying the fuel level in the fuel storage tank.

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

4. Verifying the diesel s{tys and achieves a generator voltage and frequency,of 416 ; , tvolts and 6011.2 Hz.

', respectively. + 2 40[- Too

5. Verifying the generator is synchronized loaded to 3 2700 kW. T and operates for t 60 minutes.

/

6. Verifying the diesel generator is aligned to provide standby power to the associated emergency busses.

7. /erifying that the automatic load sequencer timer is OPERABLE with designtheinterval, interval between each load block within i 10% of its

b. At least once per 92 days by verifying that a sample of diesel fuel from the fuel storage tank is within the acceptable limits specified in Table 1 of ASTM 0975-81 when checked for viscrsity, water and sediment.

All engine starts for the purpose of this Surveillance Requirement may be preceded by an engine prelube period and/or other wamup procedures recomended by the manufacturer so that mechanical wear and stress on the diesel engine is minimized.

CALVERT CLIFFS - UNIT 2 3/4 8-4 Amendment No. 191

t .

NITACllMENT (5)

IMPROVED TECIINICAL SPECIFICATION MARKED-UP PAGES 3.3.6-1 3.3.6-2 B 3.3.6-1 B 3.3.6-2 B 3.3.6-6 B 3.3.6-7 3.8.1-8 i

Haltimore Gas & Electric Company Docket Nos. 50-317 and 50-318 October 22,1997

\ .

DG-LOVS 3.3.6 3.3 INSTRUMENTATION 3.3.6 Diesel Generator (00). Loss of Vol e Start (LOVS)

Tran sien t-LC0 3.3.6 Four sensor modules nd asureme hannels per DG for the Loss of Voltage Func to , fo nsor modules and measurement channels per DG for he aded Voltage Functio 11 be OPERABLE. i JCWsest /?

APPLICABILITY: M0CES 1, 2, 3, and 4.

ACTIONS

...................................--NOTE-----------------------. --.---.---.-

Separate Condition entry is allowed for each Function.

COND111{f,l REQUIRED ACTION COMPLETION TIME

'or t~

A. One o unctions A.1 P* ice ensor module 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months with o ensor Lt oypass or trip, module or associated measurement channel AND per DG inoperable.

A.2.1 Restore sensor module 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months and associated measurement channel to OPERABLE status.

98 A.2.2 Place the sensor 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months module in trip.

CALVERT CLIFFS - UNITS 1 & 2 3.3.6-1 Revision 0

t .

Insert A

, and four sensor modules and measurement channels per DO for the Steady State Degraded Voltage Function i

l l

i '.

DG-LOVS 3.3.6 ACTIONS (contitaued)

CONDI,11pNs REQUIRED ACTION naott COMPLETION TIME B. One o unctions B.1 Enter applicable with tw sensor 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months Conditions and modules or associated Required Actions for s measurement channels i per DG inoperable, the associated DG made inoperable by DG-LOVS instrumentation.

QB l

B.2.1 --------NOTE -------

LCO 3.0.4 is not applicable.

Place one sensor 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months nodule in bypass and the other sensor module in trip.

i blQ B.2.2 Restore one sensor 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months module and associated measurement channel to OPERABLE status.

A tv1cre C. One o 4e4h nctions C.1 with m r han two Restore at least two 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months sensor modules and sensor modules or associated associated.Yt measurement channels measurementchannels to OPERABLE status, inoperable.

J CALVERT CLIFFS - UNITS 1 & 2 3.3.6-2 Revision 0

_ - __ a

__ --- ~~

t .

DG-LOVS B 3.3.6 ,

B 3.3 INSTRUMENTATION B 3.3.6 Diesel Generator (DG)-Loss of Voltage Start (LOVS)

BASES BACKGROUND The DGs provide a source of emergency power when offsite power is unavailable to allow safe plant operation.

C

%:Undervoltage

,,,,u.

Of 4 igner. nr 1taae protection will generate a LOVS in the event a m y ..__ d^d $ae

" conditio rs . - i . .,. r

._ m __

TN T E A.T O @ _M ,2 Y. ., 2_. . ". C.. ' o'.,"I.U,"" C. .. ~"' 'n_

' ' "_" a.3

~ '

A A A ^

f e._

-...,vs

_ u_

6 ew m

m w e m m._ _N i wwussuais k 9'Av bluaa su vuesa la st.gu a yys u vvs ya two : t Of f ur r:dund:nt :nd ind:p;nd:nt underveitege rehy;.

I N s5 4 T ( - 9 tM =t f f=r und r=lt:Th; G;fir:t ::t of f=r Of 2:12P 210%r:1 y:; :f :.r; ba ^;t i: pr vid; e

1t

ge. TS

ra:end =t Of f=r r-hy: :.r; set le yceride e 4 e =t-ef-feur ond rait:g: ;ign:1 :r : :ect:ined b =.

darvel j- A Settinos and Tolerances '

3.N5FWT D The settings and tolerances are based on the analytical limits presented in Reference 2.

The selection of the settings is such that adequate protection is provided when all test equipment time delays are taken into accoun he setting specified in SR 3.3.6.3 allow for calibration tolerences, potential transformer correction factors, test i

equipment uncertainties, and relay drift. A detailed description of the methodology used to calculate the settings, is provided in Reference 3. The nominal setting a'ccounts for factors described above, plus additional margin to the analytical limit. If the measured setting does not exceed the documented surveillance trip acceptance criteria, the undervoltage relay is considered OPERABLE.

Settings will ensure that the consequences of accidents will be acceptable, providing the plant is operated frbm within CALVERT CLIFFS - UNITS 1 & 2 B 3.3.6-1 Revision 0

t .

)

Insert B r

l There are three LOVS Functions, Loss of voltage. Transient Degraded voltage, and Steady State Degraded j soltage, for each 4.16 kV emergency bus.

Insert C ;

Each of the redundant 4 kV emergency buses is equipped with two se.> 4two undent e, relays. Each of the four redundant and independent undenvitage relays is comprised of three sensi.ig elements. The

, first element of the four reisys is set to prmide a two-out of four undervoltage signal upon a loss of bus voltage. The second element of the four relays is set to prmide a tweeut of fm transient undenoltage signal on 4 kV emergency bus undervoltage, The third element of the four relays prmides a two-out+f.

four steady state undervoltage signal on a sustained 4 kV emergency bus unden'oltage condition.

, insert D 1'

The transient and steady state undervoltage setpoints ensure that the safety related motors relled upon for j

accident mitigation are prmided with a minimum of 75 % and 90 % of their rated voltage, respectively.

8 f J

4 k

I r

5 V

1 9

4-i

,,..___,w,,- -m ,,vw= -- -- w --em"-'r' -*

f .

DG-LOVS B 3.3.6

(

9ASES the LCOs at the onset of the accident and the equipment functions as designed. A setting is the desired characteristic, obtained as a result of having set a device, t ;

stated in terms of calibration markings or of actual '

performance benchmarks such as pickup current and operating time at a given value of input. The term setpoint applies to instruments, and since protective relays discussed here are not inst " m te ps dire = d i LCOs, the tenn setpoin e not apply here.

, (frus; or sfeady s+deT The un ervol detection scheme has b esigned to sense a degr ed r total loss fv he 4 kV safety '

buses. .e Lvo i ense by 2 second delay bistables in l

theEngineeredSafetyFeaturesActuationSystem(ESFAS)UV sensor logic module. A complete loss of offsite power will result in approximately a 2 second delay in LOVS actuation.

The DG starts and is available to accept loads within a 10 second time interval after the.ESFAS receives a LOVS.

Emergency power is established within the maximum time delay assumed for each event analyzed in the accident analysis (Ref.2).

Senior channels, measurement channels, sensor modules and Actuation Logic are described in the Background for B 3.3.4.

Since there are four protective channels in a two-out-of-four logic for each division of the 4.16 kV power system, no single failure will prevent protective system actuation. This arrangement meets proposed IEEE

-Standard 279, August 1968 criteria (Ref. 4).

APPLICABLE khe DG-LOVS is required for Engineered Safety Ftatures SAFETY ANALYSES (ESF)systemstofunctioninanyaccidentwithalossof offsite power. Its design basis is that of the ESFAS.

Accident analyses credit the loading of the DG based on i.

loss of offsite power during a loss of coolant accident. The actual DG start has historically been associated'with the CALVERT CLIFFS - UNITS 1 & 2 B 3.3.6-2 Revision 0

DG-LOVS B 3.3.6 BAEES A.1. A.?.1. and A.2.2 Condit-one pplies if one sensor channel is inoperable for ctions per DG bus, en ore If the dk el cannot be restored to OPERABLE status, the affected~ channel should either be bypassed or tripped within Ihour(RequiredActionA.1).

Placing this channel in either Condition ensures that logic is in i known configuration. In trip, the LOVS Logic is one-out-of-three. In bypasse the LOVS Logic is two-out-of-three. The 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months Completion Time is sufficient to perform these Required Actions.

Once Required Action A.1-has been complied with, Required Action A.2.1 allows 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months to repair the inoperable sensor channel.

If the channel cannot be restored to 0FERABLE status, it must be tripped in accordance with Required Action A.2.2. The time allowed to repair or trip the channel is reasonable to repair the affected channel while l

ensuring that the risk involved in operating with the

! inoperable channel is acceptable. The 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months Completion Time' is based upon operatir., experience, which has demonstrated that a random failure of a second channel is a rare event during any given 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months period.

B.I. B.2.1. and B.2.2 Condition B p if two sensor channels are inoperable for one M h-Fun ions per DG.

i$ , rv o re The Requi is modified by a Note stating that LC0 3.0.4 is not applicable. The Note was added to allow the changing of MODES, even though two sensor channels are inoperable, with one channel bypassed and one tripped. In this configuration, the protection system is in a CALVERT CLIFFS - UNITS 1 & 2 B 3.3.6-6 Revision 0 l

__.______-----J

t I DG-LOVS B 3.3.6

-BASES one-out-of-two logic, which is adequate __to ensure that no random failure w ll prevent protection system operation.

Restoring at least one channel to OPERABLE status is the preferred action. If the channel cannot be restored to OPERABLE status within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months , the Conditions and Required Actions for the associated DG made inoperable by DG LOVS instrumentation are required to be entered. Alternatively, one affected channel is required to be bypassed and the other is tripped, in accordnce with Required Action B.2.1.

This places the Function in one-out-of-two logic. The 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months Completion Time is i#iicient to perform the Required Actions.

Once Required Action B.2.1 has been complied with, Required Action B.2.2 allows 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months to repair the bypassed or inoperable channel.

After one cht.nnel is tutored.to OPERABLE status, the provisions of Condition A still apply to the remaining inoperable channel. Therefore, the-channel that is still inoperable after completion of Required Action B.2.2 shall be placed in trip if more than 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months have elapsed since the initial channel failure. m 7

g (transient- o P 3 Y"h

Con $ition C applies when more than two undervoltage or Degi edioltage sensor channels on a single bus are inope able.

1

',Nequired Action C.1 requires all but two channels to be restored to OPERABLE status within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . With mcre than two-channels inoperable, the logic is not capable of providing a DG-LOVS signal for valid Loss of Voltage or Degraded Voltage conditions. The 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months Completion Time is reasonable to evaluate and take action to correct the degraded condition in an orderly manner and takes into CALVERT CLIFFS - UNITS 1 & 2 B 3.3.6-7 Revision 0

AC Sources-Op3 rating 3.8.1 EURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.1.3 ----.-------------NOTES------------------

1. Performance of SR 3.8.1.9 satisfies this SR.

2. All OG starts may be preceded by an engine prelube period and followed by a warmup period prior to loading.

3. A modified DG start involving idling and gradual acceleration to synchronous speed may be used for this SR as recomended by the manufacturer.

4060; VOO Verify yhDG}tartsundach e st dy 31 days state vol and s , and frequency 2 58. z and s 61. z.

SR 3.8.1.4 ------------------NOTES------------------

1. Nomentary transients below the load range do not invalidate this test.

2. This SR shall be preceded by and immediately follow without shutdown a successful performance of SR 3.8.1.3 or SR 3.8.1.9.

Verify each DG is synchronized and loaded, 31 days and operates for 2 60 minutes at a load 2 4000 kW for DG 1A, 2 2250 kW for DG 1B, .

and 2 2700 kW for DG 2A and 20.

s CALVERT CLIFFS - UNITS 1 & 2 3.A.1-8 Revision 0 o

ML20217K667

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