ML20128K071

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Proposed Tech Specs 3.3.8.1,adding Action Statement & Note Requiring Restoration of Inoperable Degraded Voltage Relays, Rev to Table 3.3.8.1-1
ML20128K071
Person / Time
Site: Clinton Constellation icon.png
Issue date: 10/04/1996
From:
ILLINOIS POWER CO.
To:
Shared Package
ML20128K039 List:
References
U-602635, NUDOCS 9610100276
Download: ML20128K071 (12)
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Text

i Attachment 3 to U-602635 LS-94-013

} Page 2L0dfnstrumentation

3.3.8.1 j 3.3 INSTRUMENTATION i 3.3.8.1 Loss of Power (LOP) Instrumentation
LC0 3.3.8.1 The LOP instrumentation for each Function in Table 0,3.8.1-1 i shall be OPERABLE.

! APPLICABILITY: MODES 1, 2, and 3,

When the associated diesel generator (DG) is required to be j OPERABLE by LC0 3.8.2, "AC Sources-Shutdown."
1 l ACTIONS I

i -------------------------------------NOTE-------------------------------------

! Separate Condition entry is allowed for each channel.

! CONDITION REQUIRED ACTION COMPLETION TIME i

i A. One or more channels A.1 Place cha,inel in 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />

! inoperable. trip.

l I

A.2 --------NOTE---------

Only applicable for Functions 1.c. 1.d.

2.c. and 2.d after Release for 0)erations (RFO) of t1e corresponding plant modification.

Restore channel 7 days i to OPERABLE Q status. _ j B. Required Action and B.1 Declare associated DG Immediately associated Completion inoperable.

Time not met.

CLINTON 3.3-78 AmendmentNo.K 9610100276 961004 1 DR ADOCK 0500 J

- - - - - - - - - - "~^

-Attachment ; to u-662tids" LS-94-013 Page 3 of 3 LOP Instrumentation 3.3.8.1 Table 3.3.8.1 1 (page 1 of 1)

Loss of Power Instrumentation 4

REQUIRED CHANNELS PER SURVEILLANCE ALLOWA8LE FUNCTION DIV!sION REQUIREMENTS VALUE

1. Divls'ans 1 and 2 -4.16 kV Emergency sus Undervoltage
a. Loss of voltage -4.16 kV 6 SR 3.3.8.1.3 2 2345 V and 5 3395 V 4

basis SR 3.3.8.1.4 )

i b. Loss of Voltage-Time 6 st 3.3.8.1.3 5 to seconds )

i

^

Delay SR 3.3.8.1.4 i Resg- 7 3974 3 901

c. Degraded voltage-4.16 kV 2 sR 3.3.8.1.1 2 3Mit V and 5 te3e V (d) j, basis 4 SR 3.3.8.1.2 sa 3.3.8.1.3 st 3.3.8.1.4
d. Degraded Voltage-Time 1 SR 3.3.8.1.2 t 14 seconds and 5 16 seconds

, Delay st 3.3.8.1.3 SR 3.3.8.1.4

. 2. Division 3 -4.16 kV Emergency sus Undervottast

a. Loss of Voltage -4.16 kV 4 SR 3.3.8.1.3 t 2345 V and s 2730 V basis sa 3.3.8.1.4
b. Loss of Voltage-Time 1 SR 3.3.8.1.3 s 3.0 seconds Detsy SR 3.3.8.1.4 AtM 2 387' 3701 II
c. Degraded Voltage -4.16 kV basis

%M SR 3.3.8.1.1 SR 3.3.8.1.2 14Mi! V and 5 4852 V Il SR 3.3.8.1.3 SR 3.3.8.1.4

d. Degraded Voltage-Time 1 SR 3.3.8.1.2 t 14 seconds and 5 16 seconds Detey SR 3.3.8.1.3 SR 3.3.8.1.4 (c) Tirik value is 4, be used aHer AfD of tite corresponding
  • 0 j/ont modiWcation, unt;/ /?fo of Me correspond,%9 plad mod,)t?ca Son ffe Deyoded Voltaje - 9,'/S kVhasih A//owal/e %lue

.sh // he Jr 376 2, va rd s 3 s 3 1 v.

(b ) TWs value is to be ased offee AFo of /Ae c o<re s,pondkg '

, ,Plonf at edi$'e af'on , (JnAYff0 o( lAc corresfondi olanf "10$/$1eaft0"

' Yl1e Oejreded 14/fape ~%/&hVfasls IN'eg,ded C4,,e/s p e ,- 50 ion .s k // b e .3, i

CLINTON 3.3-80 Amendment No.)MI J

Attachment 4 to U-602635 LS-94-013 Page 1 of 9 Attached Marked-Up Pages of the Technical Specification Bases

m .tacamenc , ou u uut o.o j

Ssh D, isian I, Di sron 2, and b y94~ y ,

f g gy, ,3 f's meeg vision ,3 eeJ 6yanc bus e rede, 7 LOP Instrumentaticn I u Atr j e. re for eac4 e enc $ 3.3.8.1 ets we /arang in .u.s,d . aohie= w*th

$"c */

  • b

< *1 BASES p/# C * '

\

BACKuROUND four undervoltage relays whose outputs are arranged in a l one-out-of-two taken twice logic configuratioA % autnut J p l .

(continued) of this logic inputs to a time delay relay.K Divi ng 11 l

ncy s Degr ea Volta .tunct) is itor yo j 4

{

rvo age re with t e outp cont sa nged g (

re ut-o f- ree logi configu lon. he tput t l i

M c inDu to a ti delay r RY /

(

i APPLICABLE ..

The LOP instrumentation ~is required for the Engineered SAFETY ANALYSES, Safety Features to function in any accident with a loss of offsite power. The required channels of LOP instrumentation j LCO, and

APPLICABILITY ensure that the ECCS and other assumed systems powered from

' the DGs provide plant protection in the event of any of the

  • analyzed accidents in References 2, 3, and 4'in which a loss l of offsite power is assumed. The initiation of the DGs on l loss of offsite power, and subsequent initiation of.the~

ECCS, ensure that the fuel peak cladding temperature remains l

below the limits of 10 CFR 50.46.

Accident analyses credit the loading of the DG based on the loss of offsite power during a loss of coolant accident l

(LOCA).

The diesel starting and loading times have been included in the delay time associated with each safety l

5 system component requiring DG supplied power following a

loss of offsite power.

d The LOP instrumentation satisfies Criterion 3 of the NRC 4

Policy Statement.

The OPERABILITY of the LOP instrumentation is depende it upon i

the OPERABILITY of the individual instrumentation channel i

Functions specified in Table 3.3.8.1-1. Each Function must have a required number of OPERABLE channels per 4.15 kV j

emergency bus; with their setpoints within the specified 2

Allowable Values. A channel is inoperable if its actual trip setpoint is not within its, required Allowable 'Value.

l The actual setpoint is calibrated consistent with applicable setpoint methodology assumptions.

The Allowable Values are specified for each Function in the Table. Nominal trip 'setpoints are specified in the setpoint calculations. The nominal setpoints are selected to ' ensure that the setpoint does not exceed the Allowable Value between CHANNEL CALIBRATIONS. Operation with a trip setpoint less conservative than the nominal trip setpoint, l (continuedl i

B 3.3-223 Revision No. 1-1 CLINTON J

, Attechment 4 to U-602635 LS-94-013

! Page 3 of 9 r

e INSERT for TS Bases at page B 3.3-223 ,

i Prior to Release for Operations (RFO) of the associated plant modification (i.e., i modification AP-027 for Division 1 or AP-028 for Division 2 ), each Division 1 and Division 2 emergency bus Degraded Voltage Function is monitored by two undervoltage i relays for each emergency bus whose outputs are arranged in a two-out-of-two logic configuration. The output of this logic inputs to a time delay relay (Ref.1). Prior to RFO of modification AP-029, the Division 3 emergency bus Degraded Voltage Function is monitored by one undervoltage relay with three output contacts arranged in a three-out-of-three logic configuration. The output of this logic inputs to a time delay relay.

Following RFO of the associated plant modification, each Division 1, Division 2, and Division 3 emergency bus Degraded Voltage Function is monitored by two undervoltage relays for each emergency bus whose outputs are arranged in a two-out-of-two logic configuration. The output of this logic inputs to a time delay relay.

l 1

l LS-94-013

! LNristrumentation B 3.3.8.1

, 3 BASES APPLICABLE 1.a. 1.b. 2.a. 2.b. 4.16 kV Emeraency Bus Undervoltaae SAFETY ANALYSES, (Loss of Voltaae) (continued)

LCO, and APPLICABILITY required equipment. The time delay specified for the Divisions 1 and 2 4.16 kV Emergency Bus Loss of Voltage Functions corresponds to a voltage at the 120-volt Basis trip setpoint of a 67 volts and s 97 volts. Lower voltage conditions will result in decreased trip times. The l Division 3 4.16 kV Emergency Bus Loss of Voltage Function 120-volt Basis trip setpoint is a 67 volts and s 78 volts.

Six channels of 4.16 kV Emergency Bus Undervoltage (Loss of Voltage) Function per associated emergency bus for Divisions 1 and 2 and four channels for Division 3 are only required to be OPERABLE when the associated DG is required to be OPERABLE to ensure that no single instrument failure can l

preclude the DG function. (Six channels input to each of l the Division 1 and Division 2 DGs and four channels input to I

l the Division 3 DG. Each of the six channels for Division 1 and six channels for Division 2 is an inverse time delay rel ay. Each of these time delays are considered to be l separate channels. For Division 3, .the Loss of Voltage Function logic inputs to a single time delay relay. Thus, l only one time delay channel is associated with Division 3.)

Refer to LCO 3.8.l', "AC Sources-Operating," and LC0 3.8.2, "AC Sources-Shutdown," for Applicability Bases for the DGs.

l.c. 1.d. 2.c. 2.d. 4.16 kV Emeraency Bus Undervoltaae i (Dearaded Voltaae)

A reduced voltage condition on a 4.16 kV emergency bus indicates that while offsite power may not be completely lost to the respective emergency bus, power may be insufficient for starting large motors without risking l

damage to the motors that could disable the ECCS function.

! Therefore, power supply to the bus is transferred from offsite power to onsite DG power when the voltage on the bus drops below the Degraded Voltage Function Allowable Values (degraded voltage with a time delay). This ensures that adequate power will be available to the required equipment.

'The Bus Undervoltage Allowable Values are low enough to prevent inadvertent power supply transfer, but high enough

/MS(4k to ensure that sufficient power is available to the required

  • NY f " I '

Iib The Ti Del 55 a le (continued)

CLINTON B 3.3-225 Revision No. 1-1

^ ~ ~

! Attachment 4 to U-602635 LS-94-013 Page 5 of 9  ;

INSERT for TS Bases at page B 3.3-225 I

As stated above, the purpose of this instrumentation is to ensure that sufficient power will be available to support the ECCS function during a LOCA. During a LOCA, the ECCS and other safety systems will be initiated at the start of the event. This large loading of .

l the safety buses results in a voltage transient of sufficient magnitude to start the degraded voltage timers. If the degraded voltage relays do not reset, which requires the voltage to i be restored to a level above the relay reset setpoint, the bus undervoltage time delay relays will trip, resulting in bus transfer to the DGs. Thus, the relay reset (pick-up) setpoint must be high enough to ensure adequate voltage for the safety-related loads. ,

Prior to RFO of the corresponding plant modification (i.e., modification AP-027 for '

Division 1, AP-028 for Division 2, or AP-29 for Division 3), the Degraded Voltage Function Allowable Value specified is the relay dropout setpoint. The Allowable Value has a 120-volt basis of 2107.5 volts and s109.5 volts (Ref. 5). Following RFO of the corresponding plant modification, the Degraded Voltage Function Allowable Value specified is the relay reset setpoint. The Allowable Value has a 120-volt basis of 2111.08 ,

volts and si11.82 as specified in IP Calculation 19-AN-19 (Ref. 5).

LS-94-013 Page 6 of 9 i

LOP Instrumentation B 3.3.8.1 BASES 5fh e

--9funeNons "0 0 )

l ACTIONS A. continued inoperable channel to OPERABLE status. If the inoperable channel cannot be restored to OPERABLE status within the allowable out of service time, the channel mu 1: = laced l

~

the tripped condition per Required Action A.1 acing i.he inoperable channel in trip would conservative 1 ompensate x .o t inoperability and allow operation to continue. rWF4 44  % us. "It n.:t:.y, if it is not desired to place the channel in ,

rp u.., s in the case where placing the channel in trip C

would result in a DG initiation)Rondition B must be -

entered and its Required Action taxen. 'Actgr s The Completion Time is intended to allow the operator time channels.

4 MSM" C. \

fLd

% If any Required Action and associated Completion Time is not l met, the associated Function may not be capable of performing the' intended function. Therefore, the associated

. DG(s) are declared inoperable irmediately. This requires l entry into applicable Conditions and Required Actions of

- LC0 3.8.1 and LCO 3.8.2, which provide appropriate actions for the inoperable DG(s).  !

SURVEILLANCE As noted'at the beginning of the SRs, the SRs for each LOP REQUIREMENTS Instrumentation Function are located in the SRs column of Table 3.3.8.1-1.

The Surveillances are modified by a Note to indicate that when a channel is placed in an inoperable status solely for performance of required Surveillanc'es, entry into associated .

Conditions and Required Actions may be delayed for up to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> provided the associated Function maintains DG initiation capability. Upon completion of the Surveillance, or expiration of the 6 hour6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> allowance, the channel must be returned to OPERABLE status or the applicable Condition entered and Required Actions taken.

(continued)

T CLINTON B 3.3-227 Revision No. 1-1

)

Attachment 4 to U-602635 )

LS-94-013 i Page 7 of 9 INSERT A for TS Bases at page B 3.3-226 (except 3 channels are required for Division 3 prior to RFO of modification AP-029 )

INSERT B for TS Bases at page B 3.3-226 (except that 3 channels input to the Division 3 DG prior to RFO of modification AP-029) ll INSERT C for TS Bases at page B 3.3-226 Footnote (a) and (b) to Table 3.3.8.1-1 explain that the TS changes are effective upon RFO of the corresponding plant modification. The planned modifications are: AP-027 for Division 1, AP-028 for Division 2, and AP-029 for Division 3.

LS-94-013

' Page 8 of 9 j LOP Instrumentation

)

B 3.3.8.1 l

BASES APPLICABLE 1.c. 1.d. 2.c. 2 d. 4.16 kV Emeroency Bus Undervoltaae SAFETY ANALYSES, (Dearaded Voltaae) (continued) 4 LCO, and

APPLICABILITY Values are long enough to provide time for the offsite power supply to recover to normal voltages, but short enough to ensure that sufficient power is available to the required 1

equipment.

/ rgstg7

~

A l

l ihannels of 4.16 kV Emergency Bus Under oltage (Degraded

' Voltage) Function per associated emergency us for Divisions 1 and 2 and thr= & r 9 #a- "?"'&r 3 are only required N to3 be OPERABLE when the associated DG is required to be

/M OPERABLE to ensure that no single instrument failure'can preclude the DG function.. (Two channels input to each of, l

( M ),_the_Divis_

{

ion 1. M "i"' & r 2 66 ,and thr = & = & 'r pt

~ 3

"-"'"' ' ~- 3 DG,5? The Degraded Voltage Function logic N i for each Division inputs to a single time delay relay.

i

' ) Thus, only one time delay channel is associated with each jg5cATC Division.) Refer to LCO 3.8.1 and LCO 3.8.2 # for

% glicatiility Bases for_the DGs.__

w [i i

ACTIONS A Note has been provided to modify the ACTIONS related to .

LOP instrumentation channels. Section 1.3, Completion  !

Times, specifies that once a Condition has been entered, subsequent divisions, subsystems, components, or variables

! expressed in the condition discovered to be inoperable or not within limits will not result in separate entry into the

' Condition. Section 1.3 also specifies that Required Actions of the Condition continue to apply for each additional failure, with~ Completion Times based on initial entry into j

the Condition. However, the Required Actions for inoperable LOP instrumentation channels provide appropriate compensatory measures for separate inoperable channels. As j such, a Note has been provided that allows separate i . Condition entry for each inoperable LOP instrumentation channel.

A.1 and A.2.

4 G -~

With one or more channels of a Function inoperable, the j

Function may not be capable of performing the intended function. Therefore, only I hour is allowed to restore the (continued) l l

l CLINTON B 3.3-226 Revision No. 1-1 )

. l

Attachment 4 to U-602635 LS-94-013 Page 9 of 9 INSERT A for TS Bases at page B 3.3-227 1-lowever, for Degraded Voltage Functions, placing the inoperable channel in trip may not  :

conservatively compensate for the inoperability. Because of the assumptions used in the setpoint calculations, the setpoint for the remaining OPERABLE channel (s) may not ,

ensure reset of the relay within the required voltage range. As a result, operation with an  !

inoperable Degraded Voltage channel (s) in trip is limited to 7 days.

i i

i INSERT B for TS Bases at page B 3.3-227 or if the inoperable channel (s) is not restored to operable status within the allowable out of service time l

l l

INSERT C for TS Bases at page B 3.3-227 Required Action A.2 is modified by a Note which states that the Required Action is only applicable for Functions 1.c, l.d,2.c, and 2.d following RFO of the corresponding plant modification (i.e., modification AP-027, AP-028, or AP-029). The 7-day limitation is imposed as a result of assumptions associated with the setpoint calculations for the modified Degraded Voltage Function instrumentation.

l 1

I

Attachment 5 to U-602635 LS-94-013 Page1 of40 2

IP Calculation 19-AN-19 (Revision 2, Volume D) l

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