Text

Proposed Tech Specs Revising ESFAS Functional Unit 6.f Re Loss of Offsite power-start turbine-driven Pump
	ML20154F831
Person / Time
Site:	Callaway
Issue date:	09/29/1998
From:	; UNION ELECTRIC CO.
To:	;
Shared Package
ML20154F829	List: ML20154F831; ULNRC-03902, Application for Amend to License NPF-30,revising ESFAS Functional Unit 6.f Re Loss of Offsite power-start Turbine Driven Pump in TS Tables 3.3-3,3.3-4 & 4.3.2;
References
	NUDOCS 9810090393
	Download: ML20154F831 (29)
	v • d • e

. ... . . . . . . . . . . . . . . . . . _ _ . - - -. --. ._ .. . .-. .

~ .

1 a.

t4 ULNRC- 03902 l

l l

ATTACHMENT THREE PROPOSED TECHNICAL SPECIFICATION REVISIONS i

l

)

[ ..

I i

9810090393 980929 e PDR ADOCK 05000483 P PDRg

k TABLE 3.3-3 (Continued) n ENGINEERED SAFETY FEATilRES ACTUATION SYSTEM INSTRUMENTATION

?

E MINIMUM '

E TOTAL NO. CllANNELS CilANNELS APPLICABLE FUNCTIONAL UNIT OF CHANNELS TO TRIP 0PERABLE- MODES _ ACTION f

E 6. Auxiliary feedwater (Continued)

U d. Steam Generator Water Level

- Low-Low (Continued) ,

2) Start Turbine-Driven Pump (Continued) ,

d) Containment Pressure- 4 2 3 1, 2, 3 37*

Environmental Allowance Modifier

e. Safety Injection See Item 1 above for all Safety injection initiating functions w Start Motor-Driven Pumps and requirements.

L;; of Off::tc P;.;;r f.

Ste.t ! .-td.c C...m. P=- -B- I , 2, 2 22 ZAffEA*T 3-]f($;)

9 Trip of all ain Feedwater 4-(2/ pump)** 2-(1/ pump in 3 1, 2### 19*** l Pumps -Start Motor-Driven same separation)

Pumps

@ h. Auxiliary feedwater Pump 3 2 2 1,2,3 15*

1 Suction Pressure-Low r

(Transfer to ESW) 5 7. Automatic Switchover to ,

Containment Sump 2 2 1, 2, 3, 4 14

a. Automatic Actuation Logic 1 and Acteation Relays (SSPS)

$.I E b. RWST Level - Low-Low 1 2 3 1, 2, 3, 4 32 l Coincident With Safety See item 1 above for Safety Injection initiating functions and !

Injection requirements.

4 e INSERT 3/4 3-18(a).

a

~ s MINIMUM TOTAL NO. CHANNELS CHANNELS APPLICABLE

' FUNCTIONAL UNIT OF CHANNELS TO TRIP ' OPERABLE MODES AC. TION ,

1

f. Loss of Offsite Power -

Start Turbine-Driven Pump

1) 4 kV Bus Undervoltage 4/ Bus 2/ Bus 3/ Bus 1, 2, 3 19*

- Loss of Voltage.

2) Automatic Actuation 2 1 2 1, 2, 3 39 Logicand Actuation Relays (LSELS and 1 BOP ESFAS) l l

h d

9 A

)

a i

l

2 # .

TABLE 3.3-3 (Continued)

ACTION STATEMENTS (Continued)

ACTION 36 - With the number of OPERABLE channet.s less than the Total j Number of Channels, STARTUP and/or POWER OPERATION may proceed provided that the Containment Pressure-Environmental Allowance Modifier channels in the affected protection sets are placed in the tripped condition within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

ACTION 37 - With the number of OPERABLE channels less than the Total j Number of Channels, operation may continue provided the inoperable cnannels are placed in the tripped condition within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

(Nore : A cndN WAn/HEntr 3? It LacAvaEb oN 7'9ftE3'y-g j ACTRON 39 - ZNSEA'r 3/+ T-2I(L)

CALLAWAY - UNIT 1 3/4 3-21(b) Amendment No.64

INSERT 3/4 3-21(b)

ACTION 39 - With the number of OPERABLE channels less than the Total Number of Channels, restore the inoperable channel (s) to OPERABLE status within 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-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 at least HOT SHUTDOWN within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

44 a

l t

" TABLE 3.3-4 (Continued)

W E ENGINEERED SAFETY FEATURES' ACTUATION SYSTEM INSTRUMENTATION .

'C TOTAL SENSOR TRIP ALLOWABLE VALUE i

ALLOWANCE iTA) Z ERROR (S)- SETPOINT -

c- FUNCTIONAL UNIT _

2"i 6. Auxiliary Feedwater (Continued) 4

c. Safety injection-Start Motor-Driven See Item 1. above for all Safety Injection Trip.Setpoints and Allowable Values.

Pumps I

f. Ler: ef a'f:it: ";;;r .

Start Turbiac " riven M-A- -H-A- -M-A - -EA--

" - - - - M-A-- '

MUrwr- r/+ 7-26

g. Trip of All Main Feedwater Pumps-t* Start Motor-Driven N.A. N.A. N.A. .N.A.

Pumps N.A.

I E h. Auxiliary Feedwater Pump Suction Pressure- N.A. N.A. 221.71 psia 120.64 psia, N.A.

Low (Transfer to ESW)

I

7. Automatic Switchover to Containment Sump .

a. Automatic Actuation Logic and Actuation N.A. N.A. N.A..

N.A. N.A.

Relays (SSPS) '

($"

no 2.0 236% 135.2%

3.4 1.21

%& b. RWST Level-Low-Low C-E Coincident with See Item 1. above fir Safety Injection Trip Setpoints and Allowable Values.

E" Safety Injection r-E I 8. Loss of Power EE

a. 4 kV Undervoltage N.A. 83V (120V Bus) 8340,-8.3V (120V Bus) !

N.A N.A. w/140.2,-0.5s delay-

-> -Loss of Voltage w/ls delay R

'S ,

. ~ . .

-- Q INSERT 3/4 3-26 TOTAL SENSOR TRIP ' ALLOWABLE FUNCTIONAL UNIT ALLOWANCE (TA) . g ERROR (S) SETPOINT y_ALUE

f. Loss of Offsite Power -

Start Turbine-Driven Pump !

1) 4 kV Bus Undervoltage See Item 8.a below for Trip Setpoints and Allowable Values.

- Loss of Voltage

2) Automatic Actuation N.A. N.A. N.A. N.A. N.A. ,

Logic and Actuation ,

Relays (LSELS and .

. BOP ESFAS) i t

c t

P

.[

?

m y - - - ,

O

~

.f t

n TABLE 4.3-2 (Continued)

N g ENGINEERED SAFETY FEATURES ACTUATION SYSTEM INSTRUMENTATION -

si<

SURVEILLANCE REQUIREMENTS !

e 5

ANALOG TRIP ACTUATING

.i MODES !

" CHANNEL DEVICE MASTER SLA!i FOR WHICH CHANNEL CHANNEL OPERATIONAL OPERATIONAL ACTUATION RELAY FUNCTIONAL UNIT CHECK RELAY SURVEILLANCE l CALIBRATION TEST _ TEST LQGIC TEST TEST TEST IS REQUIRED

6. Auxiliary Feedwater (Continued)

f. L::: :f Of':H h-c -*Hb- - -WA- -M- N.A.- -N*:--t h :!, 2, 3 r N E E n r- 3/4 w

g. Trip of All Main N.A. N.A. N.A.

i Feedwater Pumps R N.A. N.A. N.A. 1, 2 s

^

h. Auxiliary Feedwater 5 R M N.A.

Pump Suction Pressure- N.A. N.A. N.A. 1, 2, 3

[

m Low ,

7. Automatic Switchover to Containment Sump

a. Automatic Actuation N.A. N.A. N.A. N.A.

Logic and Actuation M(1) M(1) Q(3) 1, 2, 3, 4 Relays (SSPS)

b. RWST Level - Low-Low S R N.A.

Q N.A. N.A. N.A. 1, 2, 3, 4 Coincident With :

Safety Injection See Item I above for all Safety injection Surveillance Requirements.

y 8. Loss of Power A a. 4 kV Undervoltage- N.A. R N.A. N N.A. N.A. .W.A. 1, 2, 3, g: Loss of Voltage

. 4, 5++, 6++

l d b. 4 kV Undervoltage- W(4) R N.A.

M N.A. M.A. N.A. 1, 2, 3, Grid Degraded Voltage l 4, 5++, 6++ ;

.o

INSERT 3/4 3-36a -

TRIP ANALOG ACTUATING MODES "

CHANNEL DEVICE _ .

MASTER SLAVE FOR WHICH -

CHANNEL ' CHANNEL. - OPERATIONAL OPERATIONAL ACI'UATION RELAY- RELAY SURVEILLANCE FUNCTIONAL UNIT CHECK CALIBRATION TEST' TEST LQGIC TEST TEST TEST IS REOUIRED '

f. less of Offsite Power -

Start Turbine-Driven Pump

1) 4 kV Bus Undervoltage N.A. R- N.A. M N.A. N. A. - ~N.A. 1, 2, 3 .

- Loss of Voltage 2)' Automatic Actu lion N.A. N.A. N.A. R N.A. N.A. N.A. 1, 2, 3 Logicand Actuation Relays (LSELS and BOP ESFAS)

F ULNRC-03902 s

1

\

e

\

ATTACIIMENT FOUR CIIANGES TO ULNRC-3578 ATTACHMENT 19 i

o e

E E

) .

s

e E5FAS Instrumentation 3.3.2 1

ACTIONS' (continued)

CONDITION REQUIRED' ACTION COMPLETION TIME R. One train inoperable. R.1 - - - -

NOTE- - - - - -

One train may be bypassed for up to 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months for surveillance testing provided the other train is OPERABLE.

1

,- Be in MODE 3. 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months Alf R.2 Be in MODE 4. 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months E. One or Lo+h +nin M S. I farbre +~rn(d +o + 1 bo rr O fgg g gte H,+ur.

inofentIs.

of

3. p. I de in h ebE 3'. 5+ hours ANb

3. 2. 2 de in MobE [. 40 hourg CALLAWAY PLANT ITS 3,3 29 5/15/97

ESFAS Instrumentation 3.3.2~

l

< I

, .'_ - g SURVEILLANCE REQUIRENENTS

........................................N0TE........................................

Refer to Table 3.3.2 1 to determine which SRs, other than_ Response Time Verification, apply for each ESFAS Function. Response Time Verification is )

- addressed under SR 3.'3.2.10. l 6

SURVEILLANCE- FREQUENCY ,

SR 3.3.2.1 Perform CHANNEL CHECK. 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months t

4 SR 3.3.2.2 Perform ACTUATION LOGIC TEST. 31 days on a !

STAGGERED TESTS BASIS

r 1

i

SR 3.3.2.3 --- --- - --

-- - NOTE '-- -- -_-- - - - - ;

The continuity check may be excluded. ;

4 Perform. ACTUATION LOGIC TEST. 31 days on a l STAGGERED TEST !

BASIS i

SR 3.3.2.4 Perform MASTER RELAY TEST. 31 days on a ,

STAGGERED TEST l BASIS SR 3.3.2.5 -Perform COT. 92 days 1

l SR' 3.3.2.6 Perform SLAVE RELAY TEST. 92 days i l

1 i

SR 3.3.2.7 Perform TAD 0T. eye- /t msnfh ;

l (continued) l

, I

. J, . '

CALL #AY PLANT ITS 3.3 30 5/15/97

ESFAS Instrumentation 3.3.2 3 Table 3.3.21 (page 5 of 6) .

, Engineered Safety Feature Actuation System Instrumentation APPLICABLE M30ES OR OTHER SPECIFIED REQUIRED SURVEILLANCE ALLOWABLE FUNCTION COWITIONS CHANNELS CONDITIONS REQUIREENTS VALUE"'

6. Auxiliary Fee *ater-

' (amtinued)

(3) Vr.ssel aT 1. 2 4 M SR 3.3.2.1 Equivalent and . SR 3.3.2.5

' Trip Time Delay - SR 3.3.2.9 (a) Vessel aT s Vessel 4T Equivalent Equivalent s 10* RTP to 13.9%

Vessel aT RTP"8 (Power 1)

(b) lot RTP < s Vessel 4T !

Vessel aT Equivalent Equivalent to 23.9% .

1 s 20% RTP RTPm Vessel aT (Power 2)

(4) Containment 1. 2. 3 4 0 SR 3.3.2.1 s 2.0 psig

. Pressure - SR 3.3.2.5 Envirannental SR 3.3.2.9 Allowance Modifier '

e. Safety Injection Refer to Function 1 (Safety Injection) for all initiation functions and requirements,

f. Loss of Offsite Power 1.2.3 2 1 rains -f- 8 SR 3.3.2.7 NA A SR 3.3.2.9

g. Trip of all Main 1.2"' 2 per J SR 3.3.2.8 NA Fee hater Puups pump

h. Auxiliary Fee &ater 1.2.3 3 P SR 3.3.2.1 = 20.64 psia Pump Suction Transfer SR 3.3.2.9 on Suetior. Pressure - SR 3.3.2.12 Low (continued)

(a) The Allowable Value defines the limiting safety system setting. See the Bases for the Trip Setpoints.

(k) With a time delay s 240 seconds.

(1) With a time delay s 130 seconds.

(n) _ Trip function may be blocked just before shu'Aown of the last operating main feekater pump

-- and restored just after the first main feehater pump is put into service following performerce of its startup trip test.

CALLAWAY PLANT ITS 3.3 37 5/15/97

l ULNRC-03902 ATTACllMENT FIVE CIIANGES TO ULNRC-3578 ATTACIIMENT 20 l

1

1 .

ESFAS Instrumentation B 3.3.2 l l l 1 27 '

[-( -

BASES i BACKGROUND Solid State Protection System (continued) !

i are given in the Applicable Safety Analyses, LCO, and - l Applicability sections of this Bases. l Each SSPS train has a built in testing device that can .

! automatically. test the decision logic matrix functions and the i j

actuation devices while the unit is at power. When any one train is taken out of service for testing, the other train is capable s of providing unit monitoring and protection until the testing has '

1

- been completed.' The testing device is semiautomatic to minimize '

' testing time.

The actuation of ESF components is accomplished through master 4 and slave relays. The SSPS energizes the master relays appropriate for the condition of the unit. Each master relay

' then energizes one or more slave relays, which then cause l l actuation of the end devices. The master and slave relays are

routinely tested to ensure operation. The test of the master

' relays energizes the relay, which then operates the contacts and ,

applies a low voltage to the associated slave relays. ~ The low 1

voltage is not sufficient to actuate the slave relays but only

[

1 demonstrates signal path continuity. The SLAVE REMY TEST actuates the oevices if their operation will rr' interfere with l

l

+ continued unit operation. For the latter case, dual component i j

operation is prevented by the SLAVE RELAY TEST circuit, and slave l

relay contact operation is verified by a continuity check of the ]

l circuit containing the slave relay. l

.refaraWon 4

Balance of Plant (BOP) ESFAS pnuft / 8 j TheBOPE(FA r'ces o e g$als from SSPS, signal proce ing equipment *and plant radiation monitors to actuate certais i ESF equipment. There are_two redundant trains of B0P ESFAS hand a h'/d"* b,'^ Inird separation grouph:o actuate the Turbine Driven Miliary l l

} ""/ Feedwater pump 7Th 71-id tr:in: ;,revii :de:tien fer

.r"i:ry

^ F::d::t:r ^.;te:ti:n ' ;;r driJ:r, ; j . Containment Purge Isolation. Control Room Emergency Ventilation and l Emergency Exhaust Actuatica functions. 1WTEXT- i 8 1.1-49 ;

The B0P ESFAS has a built in automatic test insertion feature i (ATI) which continuously tests the system logic. Any fault I

(continued)

CALLAWAY PLANT ITS BASES B 3.3 69 5/15/97

. . . . . . .- -- - = . . ..- .. -_ . . -- - . .. .

l: .

1' INSERT B 3.3-69 ;

! and reposition automatic valves (turbine steam supply valves, turbine trip and throttle valve) as required. The separation group 2 BOP-ESFAS cabinet is - 4

- considered to be part of die end device (the Turbine Driven Auxiliary Feedwater i pump) and its OPERABILITY is addressed under LCO 3.7.5, "AFW System." :

The redundant trains provide actuation for the Motor Driven Auxiliary Feedwater l pumps (and reposition automatic valves as required, i.e., steam generator

blowdown and sample line isolation valves, ESW supply valves, CST supply i valves),

l l

0

)

l 4

4 4

_ _ _ _ _ . _ . _ - . _ _ - _ _ - . . _ . _ . . . . _ . . . _ _ . ,_ m . .

l 4

ESFAS Instrumentation B 3.3.2

, . (.

BASES l APPLICABLE taken out of the test mode (in which a channel trip was forced on the protection system) and returned to operation. Due to the SAFETY /JiALYSES,

. LCO, and failed nature of the channel, the channel cannot be. considered to ,

' APPLICABILITY be OPERABLE and is, therefore, considered to be in a state of i

(continued) bypass when the channel failure is such that its bistable is not j l tripped. Two logit. oi manual initiation channels are required to ,

. ensure no single reta failure disables the ESFAS.

The required channels of ESFAS instrumentation provide unit protection in the event of any of the an31yzed accidents. ESFAS l l

protection functions are as follows: q c 1, Safety Iniection l

l' Safety Injection (SI) provides two primary functions:

1. Primary side water addition to ensure maintenance or ,

i recovery of reactor vessel water level (coverage of .

! the active fuel for heat removal, clad integrity, l I

! and for limiting peak clad temperature to < 2200*F):

and

~

2. Boration to ensure recovery and maintenance of SDN i (k,,n < 1.0) .

I These functions are necessary to mitigate the effects of )

high energy line breaks (HELBs) both inside and outside of l I

containment The SI signal is also used to initiate other Functions such as: >

+ Phase A Isolation; e Reactor Trip:

. Turbine Trip:

Feedwater Isolation:

Start of motor driven auxiliary feedwater (AFW) pumps; e

Trola45% of SG Jlow}mn analsampl e linst)

(continued)

CALLAWAY PLANT ITS - BASES B 3.3 71 5/15/97

% . - -pr -r-wy-- --

y+_ - n -.;n .2- .a .. s.- .. w a- .- a 2 x. . - - . . . + . u .u.w,..s - + - a- m.a.i.--> ca -n....ou..--> -

c;*

ESFAS Instrumentation B 3.3.2 ,

.sm i'\;,: BASES i APPLICABLE . 1. ' Safety Iniection (continued) l SAFETY ANALYSES. .

LCO, and- .* Enabling' automatic switchover of Emergency Core :

APPLICABILITY Cooling Systems (ECCS) suction to containment

recirculation sumps, coincident with RWST. low low 1 1evel:. ;

o Emergency DG start:. ,

e Initiaton of LSELS LOCA sequencer:

i e Containment Cooling: ,

e Emergency Exhaust System in the LOCA (SIS) mode: and

"

Start of ESW and CCW pumps.

. - These other functions ensure:

. Isolation of nonessential systems through :

containment penetrations; Trip of the turbine and reactor to limit power

. l generation Isolation of main feedwater (MFW) to limit secondary ;

)

side mass losses; j e Start of AFW to ensure secondary side cooling

, So*fa SG LImdnn on) sany sI liner de lim 1+ i une Its

]ECCS Lin~Jewn SG suction fred'the refueling water

+. Enabl storage tank (RWST) switchover on low low 1 TMST level to ensure continued cooling via uss of the containment recirculation sumps:

Emergency loads for LOCA are properly sequenced and powered:

Containment cooling to pre',erve containment l integrity-l (continued)

CALLAWAY PLANT ITS BASES B 3.3 72 5/15/97

ESFAS Instrtmentation i B 3.3.2

[ jm :

E BASES ~

APPLICABLE e. Auxiliary Feedwater - Safety Iniection 4

SAFETY. ANALYSES, LCO, and An SI signal starts the motor driven AFW pumps. The i APPLICABILITY AFW initiation functions are the same as the

! .(continued) requirements for their_SI function. Therefore, the requirements are not repeated in Table 3.3.21. .

l Instead, Function 1, SI, is referenced for all

! initiating functions and requirements. !

i i

f. Auxiliary Faarbater - Loss of Offsite Power The loss of offsite power (LOP) is detected by a voltage drop on each ESF bus. The LOP is sensed and ;

processed by the cirvaitry for LOP DG Start (Load l Shedder Emergency Load Sequencer) and fed to j BOP ESFAS by relay actuation. Loss of power to I either ESF bus will start the turbine driven AFW t ensure that at least one SG contains enough wate to serve as the heat sink for reactor decay heat a sensible heat removal following the reactor trip &In addition, once the diesel generators are starte l and up to speed, the motor driven AFW pumps will b e sequentially leaded onto the diesel

$* f feallyT. rome +Le sc Dow)ow ad n n l Functions 6.a tfIh 6.f must be OPERABLE in MODES 1, 2, and 3 to ensure that the SGs remain the heat sink for the reactor, except Function 6.d.(3)'which.must be OPERABLE in only MODES 1 and 2. Vessel AT is used to limit the ;

allowed trip time delay only when greater than lot RTP.

Below 10t RTP the maximum time delay is permitted:

therefore, no OPERABILITY requirements should be imposed on the Vessel aT channels in MODE 3. SG Water Level-Low Low in any operating SG will cause the motor driven AFW pimps to start. The system is aligned so that upon a start of the pump, water immediately begins to flow to the SGs. SG Water Level-Low Low in any two operating 53s will cause the turbine driven pump to start. These Functions do not have to be OPERABLE in MODES 5 and 6 because there is not enough heat being generated in the reactor to require the SGs as a heat sink. In MODE 4, AFW actuation does not need to be OPERABLE because either AFW or residual heat removal (RIR) will be available to remove (continued)

CALLAWAY PLANT ITS BASES B 3.3 % 5/15/97

. _ _ .. _ .._ . . _ _. . __ _ ._______.___._.__.m- . . . _ ___ ._ _

ESFAS Instrumentation !

B 3.3.2 s

I BASES ACTIONS E.1. E.2.1. and E.2.2 (continued) be placed in the tripped condition. Instead it is bypassed.

Restoring the channel to OPERABLE status, or placing the inoperable channel in the bypass condition within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . is sufficient to assure that the Function remains OPERABLE and minimizes the time that the Function may be in a partial trip condition,(assuming the inoperable channel has failed high). The Completion Time is further justified based on the low probability of an event occurring during this interval. Failure to restore the inoperable channel to OPERABLE status, or place it in the

. bypassed condition within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months , requires the unit be placed in H0DE 3 within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and H0DE 4 within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . The allowed Completion Times are reasonable, based on J operating experience, to reach the required unit conditions from full power conditions in an orderly manner and without challenging unit systems. In H00E 4, these Functions are no l longer required OPERABLE.

The Required Actions are modified by a Note that allows one additional channel to be bypassed for up to 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months for !

surveillance testing. Placing a second channel in the bypass condition for up to 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months for testing purposes is acceptable based on the results of Reference 8.

F.1. F.2.1. and F.2.2 Condition F applies to:

. Manual Initiation of Steam Line Isolation: and L::: Of Off:1t: . "car. er.J

. P 4 Interlock.

For the Manual Initiation and the P 4 Interlock Functions, this f action addresses the train orientation of the SSPS. I;r tk L;;;

! Off:it: .";;;;r .';;;tica thi; ;;;i:n ::=;^1u; ik 1;d of -

-- ==;l trip ;;reci;ica f;r : f:iled : Maxi. If a train or channel is inoperable. 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months allowed to return it to '

OPERABLE status. The specified C letion Time is reasonable considering the nature of these F nctions, the available -

a re (continued) l CALLAWAY PLANT ITS - BASES B 1.3 107 5/15/97

2 ESFAS Instrumentation B 3.3.2-i

[ f7 ' BASES

~ ACTIONS 0.1. 0.2.1. and 0.2.2 (continued)-

Placing an EAM channel in trip automatically enables the SG Water Level Low Low (Adverse Containment Environment) bistable for that protection channel, with its higher SG 1evel Trip Setpoint. The Completion Time of 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months is based on Reference 11. If the inoperable channel'cannot be placed in the trip condition within the specified Completion Time, the unit must be placed in a MODE where this Function is not required to be OPERABLE. The unit must be placed in MODE 3 within an additional six hours and in MODE 4 within the following six hours.

P.1 and P.2 Condition P applies to the Auxiliary Feedwater Pump' Suction Transfer on Low Suction Pressure Function. The Condensate Storage Tank is the highly reliable and preferred' suction source for the AFW pumps. This function has a 2 out of 3 trip logic.

Therefore, continued operation is allowed with one inoperable channel until the performance of the next monthly COT on one of the other channels, as long as the inoperable channel is placed

in trip'within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . Condition P is modified by a Note stating that LCO 3.0.4 is not applicable. MODE changes are permitted with an inoperable channel.

QJ, Condition Q applies to the Auxiliary Feedwater Manual Initiation Function. With one or more channel (s) inoperable, enter the applicable Condition (s) and Required Actio s) of LCO 3.7.5 for the associated auxiliary feedwater pump (s) rendered inoperable.

R.1 and R.2 Condition R applies to the Auxiliary Feedwater Balance of Plant FM automatic actuation logic and actuation relays. With one train inoperable, the unit must be brought to MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and MODE 4 within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . The Required Actions are modified by a Note that allows one train to be (continued)

CALLAWAY PLANT ITS - BASES B 3.3 114 5/15/97 E - I

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

g ~

f

' ESFAS Instrumentation B 3.3.2 l 1

.C' . BASE.S -

! ACTIONS: R.1'and R.2 (continued)

1 bypassed for up to 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months for surveillance testing provided the l

! other train is OPERABLE.

l .rNfEW f 3'.F// S~

! SURVEILLANCE The SRs for each ESFAS Function are identified by the SRs co'.wan !

.of Table 3.3.21 and by SR 3.3.2.10.

l REQUIREENTS A Note has been added to clarify that Table 3.3.2-1 and SR 3.3.2.10 determine which SRs apply to which ESFAS Functions. l Note that each channel of process protection supplies-both trains l of the ESFAS. When testing channel I' train A and train B must

-be examined. Similarly, train A and train B must be examined when testing channel II. channel III., and channel IV. The CHANNEL CALIBRATION and COTS are performed in a manner that is consistent with the assumptions used in analytically calculating ;

the required channel accuracies. l SR 3.3.2.1 2 Performance of the CHANNEL CHECK once every 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months ensures that a gross failure of instrumentation has not occurred. A CHANNEL t CHECK is normally a comparison of the parameter indicated on one channel to a similar parameter on other channels. It is based on the acsumption that instrtment channels monitoring the same parameter should read approximately the same value. Significant deviations between the two instrtment channels could be an indication of excessive instrument drift in one of the channels or of something even a re serious. A CHANNEL CHECK will detect gross channel failure: thus. it is key to verifying the instrumentation continues to operate properly between each CHANNEL CALIBRATION.

Agreement criteria are determined by the unit staff based on a combination of the channel instrument uncertainties, including indication and reliability. If a channel is outside the criteria. it may be an indication that the sensor or the signal processing equipment has drifted outside its limit.

(continued)

CALLAWAY PLANT ITS BASES- B 3.3 115 5/15/97

(

s,

INSERT B 3.3-115 I

S.I . S.2.1. and S.2.2 1

2 Condition S applies to the Auxiliary Feedwater Loss of Offsite Power Function.

With the inoperability of one or both train (s),48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months are allowed to return the train (s) to OPERABLE status. The specified Completion Time is reasonable considering this Function is only associated with the Turbine Driven Auxiliary Feedwater pump (TDAFP), the available redundancy provided by the Motor Driven Auxiliary Feedwater pumps, and the low probability of an event occurring during this interval. If the Function cannot be returned to OPERABLE '

status, the unit must be placed in MODE 3 within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in MODE 4 within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . The allowed Completion. Times are reasonable,;

- based on operating experience, to reach the required unit conditions from full power in an orderly manner and without challenging unit systems. In MODE 4, the unit does not have any analyzed transients or conditions that require the TDAFP for mitigation.

l

, .i

ESFAS Instrumentation B 3.3.2 BASES SURVEILLANCE SR 3.3.2.6 (continued)

REQUIREMENTS ,

90 days (Reference 12). The 18 month Frequency for these slave relays is based on the need to perform this Surveillance under i the conditions that apply during a unit outage and the potential .

for an unplanned transient if the Surveill ance were performed I with the reactor at power. The SLAVE RELAY TEST of relay K620 does not include the circuitry associated with the main feedweter ;

punp trip solenoids since that circuitry serves no required l safety function. The Frequency is adequate, based on industry !

operating experience, considering instrument reliability and l operating history data. 4 I

l' i SR 3.3.2.7 SR 3.3.2.7 is the performance of a TAD 0T every 31 tys. VThis l

. test is a check of the Loss of Offsite Power Function. The trip actuating devices tested within the scope of SR 3.3.2.7 r.e the r- L= M :t;rt cir;uit: t::ted unir 2 3.3.5.2. e. rst.r su u+ n /ayr ,

anJ b/-Espns.ra,,mkon groys I anJ + logre aaaadeJ wr# Ha 7;,,.1,u b,,m hatr,y ,t,.yeq.i a

TheFrequenyc is adequate. It is based on industry operating 4

experiencef;;n;iirin; in;trant reli;bility end egr; ting l' l hictory it:. INIE#7 g f,3'-##

SR 3.3.2.8 SR 3.3.2.8 is the performance of a TADOT. This test is a check of the Manual Actuation Functions and AFW pump start on trip of all MFW pumps. It is performed every 18 months. The Frequency is adequate, based on industry operating experience and is consistent with the typical refueling cycle. The SR is modified by a Note that excludes verification of setpoints during the TADOT for manual initiation Functions. The manual initiation Functions have no associated setpoints.

SR 3.3.2.9 SR 3.3.2.9 is the performance of a CHANNEL CALIBRATION.

(continued)

CALLAWAY PLANT ITS - BASES B 3.3 118 5/15/97

z . ,.

. _e _

l INSERT B 3.3-118. I and is consistent with the typical refueling cycle. The trip actuating devices

~

f . tested have no associated setpoint.

I l

l r

i 1

1 l

l

' 'l l

o' '

LOP DG Start Instrumentation B 3.3.5 C # # # # #* # ~

~

BASE.S _

LC0 lossofoffsitepwQhe DG powers the motor driven auxiliary )

(continued) feedwater pumps'JMeKere of tre:: p" : te :t:rt muld leave j Ohly 0r: turbire driver, pa , as well as an increased potential '

for a loss of decay heat removal through the secondary system.

l APPLICABILITY The LOP DG Start Instrumentation Functions are required in

H0 DES 1, 2, 3, and 4 because ESF Functions are designed to provide protection in these MODES. Actuation in MODE 5 or 6 is required whenever the required DG must be OPERABLE so that it can !

perform its function on an LOP or degraded power to the vital I bus.

ACTIONS In the event a channel's Trip Setpoint is found nonconservative

with respect to the Allowable Value, or the channel is found inoperable, then the function that channel provides must be declared inoperable and the LC0 Condition entered for the ,

particular protection function affected. l Because the required channels are specified on a per bus basis, l the Condition may be entered separately for each bus as appropriate. l A Note has been added in the ACTIONS to clarify the application ,

of Completion Time rules. The Conditions of this Specification may be entered independently for each Function listed in the LCO.

The Completion Time (s) of the inoperable channel (s) of a Function will be tracked separately for each Function starting from the time the Condition was entered for that Function.

U Condition A applies to the LOP DG start Functions with one loss of voltage and/or one degraded voltage channel on one or both buses inoperable.

If one channel is inoperable, Required Action A.1 requires that channel to be placed in trip within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . With a channel in trip, the LOP DG start instrumentation channels are configured to provide a or . out of three logic to initiate a trip of the incoming of. site power.

continued)

CALLAWAY PLANT ITS BASES B 3.3 154 5/15/97

INSERT B 3.3-154

, which are automatically started after expiration of the appropriate time delay by .

F the LSELS. Failure of these pumps to start would leave only one turbine driven l pump, started by the BOP-ESFAS'directly upon receipt of a loss of voltage -

signal from the LSELS output relays, 4

e 1

2 l

1

- - - - - - - -. .- . - - - .- .- ..~.--...-. - - -

.i

. i LOP DG Start Instrumentaticn !

B 3.3.5 l

BASES l f.[

' ACTIONS- M (continued) .I.

A' Note.is added to allow bypassing an inoperable channel for up to 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months for surveillance testing of other channels. This allowance is made where bypassing the channel does not cause an actuation and where at least two other channels are monitoring 1 that parameter.

i The specified Completion Time and time allowed for bypassing one l

channel are reasonable considering the Function remains fully j OPERABLE on every bus and the low probability of an event ' s ji occurring during these intervals.

l i

i Condition B applies when more than one loss of voltage and/or

+ more than one degraded voltage channel on a single bus are inoperable. Condition B provides the allowance for one or more i Functions with two or more channels inoperable on a single ESF 3

bus. Once in this Condition the affected instrument function

! (loss of voltage and/or degraded voltage) may no longer be single

?

2 failure proof or may no longer be functional for the affected

-- bus. In this case, operation in the MODE of Applicability must )

{

be limited. Condition B allows 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months to restore the instrument function to the capability of continued operation in Condition A (i.e., 3 out of 4 channels per Function on each bus

! OPERABLE). The 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months allowance is based on the allowance for an inoperable LSELS in MODES 14 (Specification 3.8.1 i Condition F). This time is appropriate because the affected j instrtment channels (loss of voltage and/or degraded voltage) are

. inputs to the LSELS and rely on LSELS circuits to perform their

required actuations. Since the actuatio nd actuation relays for the loss of power instruments rbine driven AFW and diesel generator start) are an i 1 part of the LSE , an inoperable LSELS may also prevent the loss of power in ruments from performing their intended functions.

.rNSEM f 3.1-/LC Required Action B.1 requires restoring all but one channel on the affected bus to 0PERABLE status. The 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months Completion Time should allow ample time to repair most failures and takes into account the low probability of an event requiring an LOP start occurring during this interval.

(continued)

CALLAWAY PLANT ITS BASES B 3.3 155 5/15/97

r, ,

^Q INSERT B 3.3-155 start via the BOP-ESFAS, motor driven AFW pumps start via the L3ELS, 1

I 1

I l

l

,

ML20154F831

Text

Navigation menu

Search