ML20198N253

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Proposed Tech Specs Revising Setpoints & Limits of Allowable Values for LOP Instrumentation for 4kV Emergency Buses Contained in TS Table 3.3.8.1-1, LOP Instrumentation
ML20198N253
Person / Time
Site: Peach Bottom  Constellation icon.png
Issue date: 12/24/1998
From:
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
Shared Package
ML20198N250 List:
References
NUDOCS 9901060067
Download: ML20198N253 (30)
v • d • e


Text

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

ATTACHMENT 2 PEACH BOTTOM ATOMIC POWER STATION UNITS 2 AND 3 Docket Nos. 50-277 50-278 License Nos. DPR-44 DPR-56 LICENSE CHANGE APPLICATION ECR 96-01511 List of Attached Pages (Interim) l Unit 2 Unit 3  !

3.3-65 3.3-65 B 3.3-188 B 3.3-188 B 3.3-189 B 3.3-189 8 3.3-190 . B 3.3-190 l l

l l

i, P; _ PDRJ-

~

LGP Instrinnentation 3.3.8.1 i

tem e 3.3.4.1 1 (page 1 of 1) i Lees of peuer instrumensation 4

i R3BAIES CaAsuRLs SURVEILLANCE ALLOMAALE I PUBCTION *Wt mm R8SllaDENTS ynLig i

4 kV Smergency sus unservettage 1.

(Less of Voltage) 4 j e. Bus tenerwettage 1 SE 3.3.8.1.3 NA 4

st 3.3.8.1.4 L 2. 4 kV Emergency sus underwettage (Degreemd Voltage Lou setting) i s. Sus undervettees 2 SR 3.3.8.1.1 8 4 BIS-v and s-after V (1 per sa 3J.8.1.2

eewee) at 3.3.8.1.4 f . s' 2 b. Tlas Detsy 2' SR 3.3.8.1.1 t t.+ secones and

' (1 por SR 3.3.8.1.2 s-a.8.rmsenes seurse) SR 3.3.8.1.' 2. l

3. 4 kW Saargency Bus unevettage

! (Degromed Voltage Nigh setting) 34ot 3 92.9 l' Bus undervoltage st 3.3.8.1.1 3-44M v and s-5EP Y

e. 2 i (1 por SR 3.3.8.1.2

- emaree) 33 3 J.8.1.4 1 2.1. o '

b. Tlas celey 2 st 3.3.8.1.1 t-EF4 sesends and '

l

(1 per sr 3.3.8.1.2 5 55,4 usenes i j eeurre} SR 3.3.8.1.4 &2O
  • 4 4 kV Emergency sus urmervoltage j i (Oegrened Vettage LOCA) gg
a. Bus undervoltsee 2 SR 3.3.8.1.1 146M V and s 5pm Vf(M (1 per SR 3.3.8.1.2 d r. 5 ._i -2r e; source) st 3.3.8.1.4 --- =aa--

l t.a.

5

b. Ylee Detey 2 st 3.3.8.1.1 t 4,6-easenes and l j (1 por SR 3.3.8.1.2 s-9,6-seconds (,a.)

seurse) sa 3.3.8.1.4 so. e i $. 4 kV tasegency sus unservoltage (Degrened Vettage non-LOCA)

4
e. Bus undervoltage 2 st 3.3.8.1.1 t 4065-V and 1-400Piff (a)

] (1 per sa 3.3.8.1.2 M ~ - ' 1- -

~

j source) SR 3.3.8.1.4 ...=nn - -

t 1. 6 (* 4. L.

, b. Time Detsy 2 st 3.3.8.1.1 14Pd seconds and 5 -@:0 i (1 per st 3.3.8.1.2 secones(Q eeurce) st 3.3.8.1.4

~ _-- --

(a) Prior to the implementation of modification 96-01511, the Allowable Values of the hDD"' Functions below are: (

4.s 2 3691 V and I 3713 V, with intemal time delay set 2 0.9 seconds and s 1.1 seconds. -

N. 4.b 2 8.4 seconas and 5 9.6 seconds,

( 5.a 2 4065 V and 5 4089 V. with intemal time delay set 2 0.9 seconds and 51.1 seconds, 3 7 5.b 2 57.0 seconos and s 63.0 seconds.

_ m _

.PBAPS UNIT 2 3.3-65 Amendment No. 210

LOP Instrumentation B 3.3.8.1 4

BASES (continued)

APPLICABLE The LOP instrumentation is required for Engineered Safety SAFETY ANALYSES, Features to function in any accident with a loss of offsite LCO, and power. The required channels of LOP instrumentation ensure APPLICABILITY that the ECCS and other assumed systems powered from the 1

DGs, provide plant protection in the-event of any of the

! Reference 1 (UFSAR) analyzed accidents in which a loss of t offsite power is assumed. The first level is loss of i voltage. This loss of voltage level detects and disconnects 3 l

1 the Class IE buses from the offsite power source upon a l l total loss of voltage. The second level of undervoltage  !

' protection is provided by the four levels of degraded grid l voltage relays which are set to detect a sustained low '

voltage condition. These degraded grid _ relays disconnect the Class IE buses from the offsite power source if the i degraded voltage condition exists for a time interval which  :

i could prevent the Class IE equipment from achieving its safety function. The degraded grid relays also prevent the i

' Class IE equipment from sustaining damage from prolonged 1 operation at reduced voltage. The combination of the loss j

of voltage relaying and the degraded grid relaying provides protection to the Class IE distribution system for all l

credible conditions of voltage collapse or sustained voltage j degradation. The initiation of the DGs on loss of offsite power, and subsequent initiation of the ECCS, ensure that j the fuel peak cladding temperature remains below the limits

of 10 CFR 50.46.

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

The diesel starting and loading times have been included in ,

the delay time associated with each safety system component I requiring OG suppliec cower following a loss of offsite power.

The LOP instrumentation satisfies Criterion 3 of the NRC Policy Statement.

The OPERABILITY of tne LOP instrumentation is dependent upon l the OPERABILITY of tne individual instrumentation relay channel Functions specified in Table 3.3.8.1-1. Eacn Function must have a required number of OPERABLE cnannels per 4 kV emergency :us, with their setpoints within the specified Allowaole ialues except the bus undervoltage relay which ooes not have an Allowaole Value. A degraceo voltage channel is inoperaoie if its actual trio setooint is not within its requireo Allowable Value. W nti x;nP.: Q e (continued)  ;

O '

??APS UNIT 2 3 3.2-188 Revisien No. 5 j

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

- INSERT A P

Setpoints are calibrated consistent with the improved Instrument Setpoint Control Program (IISCP) methodology assumptions. (Note: Table 3.3.8.1-1 contains a note that prior to the implementation of ,

modification 9641511, the relay voltage and timer trip setpoint Allowable Values for the indicated .

functions remain at the previously approved values on a relay by relay basis.)

a d

1 3

4 4

4

'l i J

+

'l

LOP Instrumentation 2 B 3.3.8.1 BASES

~

g[ ([r M _

APPLICABLE ( ::? !br:ted cr:irtrt "it" rd ic!M e !?'rei-t et'edeh;y SAFETY ANALYSES,L ~"=a+4aae J The loss or vo t tage cnannet is inoperacie ir LCO, and it will not start the diesel on a loss of power to a 4 kV APPLICABILITY emergency bus.

4 (continued)

The Allowable Values are specified for each appligable l Function in the Table 3.3.8.1-1. The nominal setpoints are selected to ensure that the setpoints do not exceed the Allowable Value between CHANNEL CALIBRATIONS. Operation l with a trip setpoint within the Allowable Value, is acceptable. Trip setpoints are those predetermined values of output at which an action should take place. The setpoints are compared to the actual process parameter (e.g., voltage), and when the measured output value of the process parameter exceeds the setpoint, the protective relay output changes state. The Allowable Values were set equal to the limitino values determined by the voltace regulation calculationfhe ::!pents were corrected te acert fer r:1;3 ;;; recy,- t;;t ; quip;;;t :::;r;;y, :nd p;t;nti;i temnefnemar heirrla n steinn s e nt e n ra ennt nf tha e nim at m i Ice  :;;:r;: ::th d h;y.f The setpoint assumes a nominai 35/I r%g3 tential transfonner ratio.

The specific Applicable Safety Analyses, LCO, and Applicability discussions for Unit 2 LOP instrumentation are  ;

listed below on a function by Function basis.  !

In addition, since some equipment required by Unit 2 is powered from Unit 3 sources, the Unit 3 LOP instrumentation supporting the required sources must also be OPERABLE. The OPERABILITY requirements for the Unit 3 LOP instrumentation is tne same as describeo in this section, except Function 4 (4 kV Emergency Bus Undervoltage, :egraded Voltage LOCA) is not reouired to oe OPERABLE, since ::lis Function is related to a LOCA on Unit 3 only. The Unit 3 instrumentation is listeo in Unit 3 Table 3.3.8.1-1.

1, a kV Emercency Bus Undervoltace / Loss of Voltace) l When oath offsite sources are lost. a loss of voltage j conoition on a 4 kV emergency bus ir.cicates that the respective emergency bus is unaole to suoply sufficient power f:r proper coeration of the acclicaole equipment.

Therefore, the power supply to the ous is transferred from offsite power to OG power. This ensures that adequate power l will 'e: available to the required e:uipment. -

(continutdl l

l PBAPS UNIT 2 3 3.3-189 Revision No. 5 I

l i

s

, I INSERT B The setponts were corrected using IISCP methodology to account for relay drift, relay accuracy, potential transformer accuracy, measuring and test equipment accuracy margin, and indudes a 1 calibration leave alone zone. IISCP methodology utilizes the square root of the sum of the squares to combine random non-directional accuracy values. IISCP then ir,dtHjes relay drift Calibration leave alone zones, and margins. (Note: Table 3.3.8.1 1 contains a note that prior to the implementation of modificabon 96-01511, the relay voltage and timer trip setpoint Allowable _ Values for the indicated functions remain at the previously approved values on a relay by relay basis.) l i

l

h LOP Instrumentation B 3.3.8.1 l

BASES APPLICABLE 1. a kV Emeroency Bus Undervoltaae (Loss of Voltaae)

SAFETY ANALYSIS, (continued)

LCO, and i APPLICABILITY The single channel of 4 kV Emergency Bus Undervoltage

! of Voltage) Function per associated emergency bus is on(Loss ly 1 i required to be OPERABLE when the associated DG and offsite l circuit are required to be OPERABLE. This ensures no single

instrument failure can preclude the start of three of four .

DGs. (One channel inputs to each of the four DGs.) Refer l e to LCO 3.8.1, "AC Sources -Operating," and 3.8.2, "AC I Sources-Shutdown," for Applicability Basas for the DGs. l

{ 2. 3. 4. 5. 4kV Emeroency Bus Undervoltaae (Deoraded Voltaoe) *

{

l A degraded. voltage cond1 tion on a 4 kV emergency bus indicates that, while offsite power may not be completely

! lost to the respective emergency bus, available power may be insufficient for starting large ECCS motors without risking

. damage to the motors that could disable the ECCS function.

i i

Therefore, power to the bus is transferred from offsite

. j power to onsite DG power when there is insufficient offsite i power to the bus. This transfer will occur only if the l l voltage of the preferred and alternate power sources drop i below the Degraded Voltage Function Allowable Values

! (degraded voltage with a time delay) and the source bretkers

! trip which causes the bus undervoltage relay to initiate the i DG. This ensures that adequate power will be available to j the required equipment. l i Four Functions are provided to monitor degraded voltage at four ::ifferent levels. These Functions are the Degraded Voltage Non-LOCA, Degraded Voltage LOCA, Degraded Voltage

i. Hi h Setting, and De raded Voltage Low Settin ese m e ays r gy eve s the i- L e. ' follo n time del s: he Func on rela 6 in ap ximat ly 2 conds en urce vo t e is re ced
L eA~

__p,f ruotly to volts (in se time de y); the Fu on 3 y, 87% 1

, r proximatel second w n source tage C is r duce bru ly to 8 vol (inv rse t e del ; e relay,  % approx a ly 10 s and ; and e t.Functi Functi n 5 ralav 9 in approxi telv sec s .J T?ie runction 2 anc re ays are inverse time iFelay relays.

These relays operate alor.g a repeatable charaheristic curve. With relay operation being inverse with time, for (continued) o

? SAPS UNIT : B 3.3-130 Revision No. 5 i

i

+

5 INSERT C These relays monitor the following volta 0e levels with the following time delays: the Function 2 relay, '

2286 - 2706 volts in approximately 2 seconds when source voltage is reduced abruptly to zero volts (inverse time delay); the Function 3 relay,3409 - 3829 volts in approximately 30 seconds when source ,

voltage is reduced abruptly to 2940 volts (inverse time delay); the Function 4 relay,3760 - 3836 volts in approximately 10 seconds; and the Function 5 relay,4116 - 4186 volts .in approximately 60 seconds,  !

(Note: Table 3.3.8.1-1 contains a note that prior to the implementation of modification 96-01511, the relay  !

voltage and timer trip setpoint Allowable Values for the indicated functions remain at the previously i approved values on a relay by relay basis.)  ;

4 h

}

L 4

i 4

1 4..

i:

i 4.

e

. , .;,...,- .;.-.-,._. .~.

LOP Instrtneentation 3.3.8.1 Yabte 3.3.8.1 1 (pose 1 ef 1)

Lees of Power Instrtamentation EseUIRED

-a gayEILLANCE ALLINABL8 FlecT!ce PER sus REeuttBENTS VAug

1. 4 kW taarsency sus undervettage (Lees of vettage)
a. Bus undervettage 1 at 3.3.8.1.3 h4 st 3J.8.1.4
2. 4 kV Emergency sus underwetteos (Desraeed vettage Lew settirig) .

71 dl, 7.7 * (e

a. Sus undervettage 2 sa 3.3.8.1.1 3-Esas V and s 8504 y

. (1.per SR 3 J.8.1.2 source) SR 3.3.8.1.4

8. S'
b. Time Detsy 2 SR 3.3.8.1.1 3 4id-secanes and (1 por sa 3.3.8.1.2 s.3 e secenes source) SR 3.3.8.1.4 y,g
3. 4 ky gearsency sus under ettage (seeroemd vettage Nish settino) ygp
a. Sus undervettage 2 st 3.3.8.1.1 a 1444 V and s-SaEF V (1 per sa 3.3.8.1.2 seurse) st 3J.8.1.4

' ~13. o

b. TimeCotay 2 sa 3.3.8.1.1 a fF A seconds and (1 per st 3.3.8.1.2 s 48 4 seconds
l. source) sa 3.3.8.1.4 .3*2 o
4. 4 kV Emergency tus undervoltage (Deeremos vettage LocA) 3 7G 6, 7 f3t,
a. Sus undervottage 2 sa 3.3.8.1.1 (1 per 2-3ept

~" y and s -PG vf'-(A) sa 3.3.8.1.2 r --' -

source) st 3.3.8.1.4 -t^" w

?

9. 2 i b. Tlae Delay 2 sa 3.3.3.1.1 t 9 T seconos and (1 per sa 3.3.8.1.2 s 92 secenas (a) source) Sa 3.3.8.1.4 g,g

, 5. 4 kW Emergerry sus undervoltage

(Degraaed vettage non*LOCA) 4 h t. 4tGG
a. Bus undervettage 2 sa 3.3.8.1.1 2 40 E V and s 400p.v (1 per sa 3.3.8.1.2 -

'*M '- : x ' 5 " fi-;(a) source) st 3.3.8.1.4  :-*  ? a " : . _ =

^

i 1 5 ~26 G 4.2.

b. Time celey 2 st 3.3.8.1.1 1474 seconcs and s il&ee-
~

(1 per ss 3.3.8.1.2 secenas ( a i source) sa 3.3.8.1.4 (a) Prior to the implementation of modification 96-01511, the Allowable Values of the Functions below are:

1 pn  ? 4.a 2 3691 V and s 3713 V, with intemal time delay set 2 0.9 seconds and s 1.1 seconds, '

.. / 4.b 2 8.4 seconds and 5 9.6 seconds, "

, 5.a 2 4065 V and 5 4089 V, with intemal time delay set 2 0.9 seconds and s 1.1 seconds,

' r 5.b 2 57.0 seconos and 5 63.0 seconds.

! YP 3W'AlireiforenYN 214 l

LOP Instrumentation

. B 3.3.8.1 i

l BASES (continued) i i

{ APPLICABLE The LOP instrumentation is required for Engineered Safety

SAFETY ANALYSES, Features to function in any accident with a loss of offsite i LCO, and power. The required channels of LOP instrumentation ensum APPLICABILITY that the ECCS and other assumed systems powered from the i des, provide plant protection in the event of any of the Reference 1 (UFSAR) analyzed accidents in which a loss of i offsite power is assumed. The first level is loss of voltage. This loss of voltage level detects and disconnects the Class IE buses from the offsite power source upon a j total loss of voltage. The second level of undervoltage protection is provided by the four levels of degraded grid '

voltage relays which are set to detect a sustained low

. voltage condition. These degraded grid relays disconnect the Class IE buses from the offsite power source if the degraded voltage condition exists for a time interval which could prevent the Class IE equipment from achieving its

~

safety function. The degraded grid relays also prevent the Class IE equipment from sustaining damage from prolonged operation at reduced voltage. The combination of the loss of voltage relaying and the degraded grid relaying provides  ;

protection to the Class IE distribution system for all  !

credible conditions of voltage collapse or sustained voltage  !

degradation. The initiation of the DGs on loss of offsite power, and subsequent initiation of the ECCS, ensure that the fuel peak cladding temperature remains below the limits of 10 CFR 50.46. i Accident analyses credit the loading of the DG based on the loss of offsite power during a loss of coolant accident.

The diesel starting and loading times have been included in the delay time associated with each safety system component requiring DG supplied power following a loss of offsite power.

The LOP instrumentation satisfies Criterion 3 of the NRC Policy Statement.

The OPERABILITY of the LOP instrumenta ion is dependent upon l the OPERABILITY of the individual instrumentation relay channel Functions specified in Table 3.3.8.1-1. Each Function must have a required number of OPERABLE channels per 4 kV emergency bus, with their setpoints within the specified Allowable Values except the bus undervoltage relay which does not have an Allowable Value. A degraded voltage channel is inoperable if its actual trin setnoint is nnt within its required Allowable Value.Qhe ::te:! :04:4-t u]

[ (continued) ,

8 3.3-188 N

PBAPS UNIT 3 Revision No. 5 l

k

)

' INSERT A '

Setpoints are calibrated consistent with the Improved instrument Setpoint Control Program (llSCP) methodology assumptions. (Note: Table 3.3.8.1-1 contains a note that prior to the implementation of

' modification 9641511, the relay voltage and timer trip setpoint Allowable Values for the indicated ,

functkms remain at the previously approved values on a relay by relay basis.)

1 8

4 f

I

4 i

LOP Instrumentation B 3.3.8.1 i

{

BASES 5 e- ,. ~I"j4eet -

APPLICABLE (h;;;=0 ;;;:t:t;;t rith :;;1i::M: =t;: tit rt':t!::O SAFETY ANALYSES,( n:-i: r >The loss of voltage channel is inoperab' e if LCO, and 7t wi' not start the diesel on a loss of power to a 4 kV APPLICABILITY emergency bus.

! (continued) i The Allowable Values are specified for each applicable l Function in the Table 3.3.8.1-1. The nominal setpoints are j selected to ensure that the setpoints do not exceed the  ;

i Allowable Value between CHANNEL CALIBRATIONS. Operation l

l with a trip setpoint within the Allowable Value, is i acceptable. Trip setpoints are those predetermined values j of output at which an action should take place. The i

! setpoints are compared to the actual process parameter (e.g., voltage), and when the measured output value of the  :

i process parameter exceeds the setpoint, the protective relay -

! output changes state. The Allowable Values were set equal 1 to the limitina values determined by the voltace reculation c_alculationfh: ::t;: tit: ::r: ::Tr : :d t: =: x:t f;r l Sac f r- g ~;y ecy, tert e e!; r -t 3cce 3cy, 3-g 7:te_tt e t... sm - k.. q. .3 4 n , ....... .cet es +ke go- me ty; L ae/F 6

, a.. ---

--+k~4alecy._Ahe setpoint assumes a nomina; 35/1 ,

potential transfonner ratio.

i l- The specific Applicable Safety Analyses, LCO, and i

! Applicability discussions for Unit 3 LOP instrumentation are

! listed below on a Function by Function basis.

)

i In addition, since some equipment required by Unit 3 is .

powered from Unit 2 sources, the Unit 2 LOP instrumentation  !

supporting the required sources.must also be OPERABLE. The j OPERABILITY requirements for the Unit 2 LOP instrumentation

is the same as described in this section, except Functior, 4 l (4 kV Emergency Bus Undervoltage, Degraded Voltage LOCA) is
not required to be OPERABLE, since this Function is related l l to a LOCA on Unit 2 only. The Unit 2 instrumentation is j listed in Unit 2 Table 3.3.8.1-1.

I i

1. 4 kV Emeroency Bus Undervoltace (Loss of Voltace)

When both offsite sources are lost, a loss of voltage >

condition on a 4 kV emergency bus indicates that the ,

4

' respective emergency bus is unable to supply sufficient power for proper operation of the applicable equipment.

i Therefore, the power supply to the bus is transferred from offsite power to OG power. This ensures that adequate power -

u will be available to the required equipment.

i (continued)

L PBAPS UNIT 3 8 3.3-189 Revision No. 5 l

T

! .. _ . __ ..________________________________i

3 k

t t

INSERT B i

The setpoints were corrected using IISCP methodology to account for relay drift, relay accuracy, potential transformer accuracy, measuring and test equipment accuracy margin, and includes a ,

calibration leave alone zone. ilSCP methodology utilizes the square root of the sum of the squares to combme random non-directional accuracy values. IISCP then includes relay drift, calibration leave alone -

zones, and margins. (Note: Table 3.3.8.1 1 contains a note that prior to the implementation of modification 96-01511, the relay voltage and timer trip setpoint Allowable Values for the indicated ,

functions remain at the previously approved values on a relay by relay basis.)

l i

+

5 h

i 1

1 l

l i LOP Instrumentation B 3.3.8.1 BASES j 1

1 APPLICABLE 1. 4 kV Emeroency Bus Undervoltaae (Loss of Voltaae) {

SAFETY ANALYSIS,- (continued)  ;

LCO, and 1 APPLICABILITY The single channel of 4 kV Emergency Bus Undervoltage (Loss I

of Voltage) Function per associated emergency bus is only )

required to be OPERABLE when the associated DG and offsite circuit are required to be OPERABLE. This ensures no single instrument failure can preclude the start of three of four DGs. (One channel inputs to each of the four DGs.) Refer to LCO 3.B.1, "AC Sources-Operating," and 3.8.2, "AC Sources-Shutdown," for Applicability Bases for the DGs.

2. 3. 4. 5. 4kV Emeroency Bus Undervoltace (Decraded

. Voltaae) l A degraded voltage condition on a 4 kV emergency bus

indicates that, while offsite power may not be completely lost to the respective emergency bus, available power may be insufficient for starting large ECCS motors without risking damage to the motors that could disable the ECCS function.

Therefore, power to the bus is transferred from offsite l power to onsite DG power when there is insufficient offsite powtr to the bus. This transfer will occur only if the l volt 2ge of the preferred and alternate power sources drop below the Degraded Voltage Function Allowable Values (degraded voltage with a time delay) and the source breakers trip which causes the bus undervoltage relay to initiate the DG. This ensures that adequate. power will be available to the required equipment.

Four Functions are provided to monitor degraced voltage at four different levels. These Functions are the Degraded Voltage Non-LOCA, Degraded Voltage LOCA, Degraded Voltage High Setting, and Degraded Voltage Low Settina/These e ays moni n the fall too volta evels wit'h he s fol'owing ime delays: the Functi 2 elay, 0% *n

[S]ee appr i tely 2 s co swhenyou' e vol ge s reduced abrupt , the Funct. ion 3 f

/

\-M

>"q to zero y

% in appr s (invers

'mately 30

ime dela conds wh source vp4tage I ( relay is r duce abrup yt 84 vol nyerse ima, delayg; 'the /

,' \ Fu tion 4 ela , 89% 1 app xima ly seconds the J

'T ction 5 r , 98% in p eximate _0 secorhis'y and.fThe Function z ano a relays are inverse nme delay relays.

These relays operate along a repeatable characteristic curve. With relay operation being inverse with time, for (continued)

PBAPS UNIT 3 3 3.3-190 Revision No. 5

INSERT C '

These relays rnonitor the following voltage levels with the following time delays: the Function 2 relay, 2286 - 2706 volts in approximately 2 seconds when source voltage is reduced abruptly to zero volts (inverse time delay); the Function 3 relay,3409 - 3829 volto in approximately 30 seconds when source

. voltage is reduced abruptly to 2940 volts (inverse time delay); the Function 4 relay,3766 - 3836 volts in approximately 10 seconds; and the Function 5 relay,4116 - 4186 volts in approximately 60 seconds.

(Note: Table 3.3.8.1 1 contains a note that prior to the implementation of modification 96-01511, the relay voltage and timer trip setpoint Allowable Values for the indicated functions remain at the previously approved values on a relay by relay basis.)

i i

l 1

4 l

i j

!l

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

I i

ATTACHMENT 3 i

PEACH BOTTOM ATOMIC POWER STATION UNITS 2 AND 3 Docket Nos. 50-277 '

50-278 License Nos. DPR-44 DPR-56 LICENSE CHANGE APPLICATION  ;

ECR 96-01511 List of Attached Pages (Final)

_ Unit 2 Unit 3 3.3-65 3.3-65 B 3.3-188 8 3.3-188 B 3.3-189 B 3.3-189 B 3.3-190 B 3.3-190 i1-' --

a s

LOP Instrtmentation 3.3.8.1 l

4 i

table 3.3.5.1 1 (sese 1 of 1) l Less of Pouer instrueentation '

t '.

l l

RERJ1 TID i CEANNELS staVEILLANC8 ALLQlMALE FLECTI(Bi PER BLE A8al!REMENTs VALIE i

, 1. 4 kV Emergenev Sus uruservettage j (Less of Yeltage)

a. Bus imeervettage i sa 3.3.8.1.3 NA I
sa 3.3.3.1.4 '

2, 4 kV L L _i sus unservettage (Begreene Vettage Lou setting)

W 27eb

s. Bus undervettsee 1 SR 3.3.8.1.1 a GABS-Y and s 49 h Y

' (1,per sa 3.3.8.1.2 ,

source) SR 3.3.8.1.4 g i

b. Time Detov 2 SR 3 3 8 I+1 1 4'4-secanos ano l,

(1 per sa 3.3.8.1.2 s 4 4 seconos source) st 3.3.8.1.4 2.. J ,

1

3. 4 kV Emergency tus uruservoltage (Degrooed Vettage Nigh setting) y
a. Bus undervettete 2 sa 3.3.8.1.1 14644-V ano a SEP=Y (1 per sa 3.3.8.1.2 source) st 3.3.3.1.4 41.0
b. Tlas Delay 2 33 3.3.3.1.1 1 M secenes and (1 per st 3.3.8.1.2 5 45.", secenas sourcel SR 3.3.8.1.4 37,o 4 4 kV Emergency Bus undervottage (Degraced Voltage LOCA) 3 % f, 1836
s. Its uruservottsee 2 sa 3.3.8.1.1 t4484-# ano s BM5-Yp (1 per st 3.3.8.1.2 _.

. . . . . . . . . _. . a source) st 3.3.8.1.4 see.' a a -

a < < . _

0.2 t:. ino DeLav 2 st 3.3.8.1.* 1 4 ,4.seconos ano (1 per st 3.3.8.1.2 s t.9 seconos source) st 3.3.8.1.4 /0, S

5. 4 kV Emergency sus unnervoltage (Degramee Voltape non-LOCA)
s. Bus undervettage 2 52 3.3.5.1.1 3 6066.V ana 5 600hYf (1 per st 3.3.8.1.2 wi n i - - " -- -

source) st 3.3.8.1.4 m ' a e -- -- =

b.  ? tee cetev f7.6 3 %6-seconos ano s 4&,4
f. 4. L 2 52 3.3.8.1.1 (1 per SR 3.3.8.1.2 seconns saurce) st 3.3.3.1.4 PBAPS '.' NIT 2 3.3-65 Amenc=ent No. 210

B 3.3.8.1 BASES (continued)

APPLICABLE The LOP instrumentation is required for Engineered Safety SAFETY ANALYSES, Features to function in any accident with a loss of offsite

LCO, and power. The required channels of LOP instrumentation ensure APPLICABILITY that the ECCS and other assumed systems powered from the DGs, provide plant protection in the event of any of the Reference 1 (UFSAR) analyzed accidents in which a loss of
offsite power is assumed. The first level is loss of 1

voltage. This loss of voltage level detects and disconnects the Class IE buses from the offsite power source upon a j

l total loss of voltage. The second level of undervoltage protection is provided by the four levels of degraded grid voltage relays which are set to detect a sustained low i

' voltage condition. These degraded grid relays disconnect  :

the Class IE buses from the offsite power source if the i

degradeo voltage condition exists for a time interval which j

could prevent the Class IE equipment from achieving its safety function. The degraded grid relays also prevent the

Class IE equipment from sustaining damage from prolonged i

operation at reduced voltage. The combination of the loss of voltage relaying and the degraded grid relaying provides protection to the Class 1E distribution system for all credible conditions of voltage collapse or sustained voltage

, degradation. The initiation of the DGs on loss of offsite power, and subsequent initiation of the ECCS, ensure that '

the fuel peak cladding temperature remains below the limits of 10 CFR 50.46.

Accicent analyses credit the loading of the DG based on the loss of offsite power during a loss of coolant accident.

The ciesei starting and loacing times nave been included in the celay time associated with eacn safety system component recuiring DG suppliec power f:llowing a loss of offsite power.

The OP instrumentation satisfies Criterton 3 of the NRC Policy Statement.

The OPERABILITY of the LOP instrumentation is dependent upon the OPERABILITY of the indivioual instrumentation relay channel Functions specified in Table 3.3.8.1-1. Each Functi:n must have a requireo numoer :f OPERABLE cnannels per 4 kV emergency bus, with their setcoints within the specifiec Allowaole Values exce:t the :us uncervoltage relay wnten coes not have an Allowaole Value. A degracea voltage-channei is inocerable if its actual trio set:oint is not within its reautred Allowaole Value. { ;;; ;; ;;nint i[

.  ! / continued) l

~

?BAPS UNIT 2 S 3.3-188  % w :levision No. 5 j I-L.- - - -- -- + - - - .- - -__o -

n- ,, ---- - - _ -

l

4 i

6 d'

f INSERT A' 5

4 Setpoints are calibrated consistent with the Improved instrument Setpoint Control Program (IISCP) methodology assumptions.-

t b

i

+

3

.t F

1

-_ < _ _ , _ _ _ _ _ _ _ _____.____._1____.___i___

LOP Instrumentation S 3.3.8.1 i

BASE 3 p ,-t APPLICABLE /-ed ibr= :n:::rt ' r =!iciE!e re'r?'-: at'r ;y  !

SAFETt ANALYSES,l m"-aHaae JThe ioss :r voitage cnannes is inoperante ir  ;

LCO, and it wul not start the ciesei on a loss of power to a 4 kV  !

APPLICABILITY emergency bus. l (continueo) 1 The Allowable Values are specified for each applicable l Function in the Table 3.3.8.1-1. The nominal setpoints are selected to ensure that the setpoints do not exceed the i Allowable Value cetween CHANNEL CALIBRATIONS. Operation

! with a trip setpoint within the Allowable Value, is  :

acceptable. Trip setpoints are those predetermined values l of output at which an F. tion should take place. The '

setpoints are compkred to the actual process parameter '

(e.g., voltage), and wnen the measured output value of the  ;

process parameter exceecs the setpoint, the protective relay output changes state. The Allowable Values were set equal i to the limitino values :etermined by the voltaoe reculation 1 calculation f h: ::::: -:: 'ere cc--ectec :: icter: 'e- T r;i., ;;; c.;;, ;;;t ::;t;m;n :::;r:;3, :nd ;;;;nu;l s*"%s== f y* 3 n e f m PfnA P ht f PM afi 'ft4 e af tMf t3 PA ,*M M t nf Oba e f fne m8 & lm a 3 t.  :;rrn ::th:2!:;y fTne setpoint assumes a nominal 3hi ~

[rw E , potential transrormer ratio. l b  :

The specific Applicable Safety Analyses. LCO, and Applicability discussions for Unit 2 LOP instrumentation are listed below on a Function by function basis. )

1 In addition, since some ecuipment required by Unit 2 is l powered from Unit 3 sources, the Unit 3 LOP instrumentation '

supporting the reouireo sources must also be OPERABLE. The OPERABILITY requirements for the Unit 3 LOP instrumentation is the same as cescribeo in this section, except Function 4 (4 kV Emergency Sus Uncervoitage, Degraceo Voltage LOCA) is not recuireo to :e OPERA 3LE. since this func:icn is relatea to a LOCA on Uni: 3 only. The Unit 3 instrumentation is listeo in Unit 3 Table 3.3.3.1-1.

1. A kV E-erceatv Bus .acervoltace floss ef Voltace)

When ooth offsite sources are lost, a loss of voltage condition on a 4 kV emergency bus indicates that the respective emergency cus is unable to supply sufficient power for procer coerati:n of the acolicaole ecuioment.

Therefore, :ne cower ::::iy to the cus is transferreo from offsi:e ;ower to CG cower. This ensures ina; aceouate power will be available to tne recuireo ecuioment. -

/ Continueo)

3 API UNIT 2 3 3.3-139 :evision No. 5

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

i 4

t INSERTB I The setpoints were corrected using IISCP methodology to account for relay drift, relay accuracy,

, potential transformer accuracy, measuring and test equipment accuracy margin, and includes a

. calibration leave alone zone, llSCP methodology utilizes the square root of the sum of the squares to combine random non-directional accuracy values. lISCP then includes relay drift, calibration leave alone zones, and margins.

m i

i 1

j 2

1 4

f l

d i

J

LOP Instrumentation  !

8 3.3.8.1 BASES e.

APPLICABLE 1. a kV Emereenev Bus Undervoltace _ess ef Voltace)

SAFETY ANALYSIS, fcontinueo)

LCO, and APPLICABILITY The single enannel of 4 kV Emergency Bus Undervoltage (Loss of Voltage) Function per associatec emergency bus is only required to be OPERABLE when the associated DG and offsite i

circuit are required to be OPERABLE. This ensures no single .

instrument failure can preclude the start of three of four DGs. (One channel inputs to each of the four DGs.) Refer to LCO 3.8.1 "AC Sources -Operating," ano 3.8.2, "AC

Sources-Shutdown," for Applicaoility Bases for the DGs.
2. 3. 4
5. 4kV EmeroencY Bus Undervoltace (Deoraded Voltace)

A degraceo voltage condition on a 4 kV emergency bus

' inoicates that, while offsite oower may not be completely 4

lost to the respective emergency bus, available power may be insufficient for starting large ECCS motors without risking damage to the motors that could disable the ECCS function.

Therefore, power to the bus is transferred from offsite .

l power to ensi+.e DG power when there is insufficient offsite l power to the ous. This transfer vill occur only if the  !

l voltage of the preferred and alternate power sources drop t

' below the Degraded Voltage Function Allowaole Values j (degraced voltage with a time celay) and the source breakers trip .nich causes the bus undervoltage relay to initiate the DG. This ensures that adequate power will ce available to the recuirec equipment.

Four : ncti:ns are provided to mani::r :egraced voltage at four :ifferent levels. These Funct :ns are tne Degraced Voltage Non- :CA, Degracea Voltage JCA. egraced Voltage Hion Setting, and Deoraced Voltage Low Settin p elays i r6 Ms i gv levels .the 5 e folio n, time del s: he Func* en e reia , 50 in ap ex1 mat ly 2 e conos en e urce vo t e is re ced Led' 9I r.ructly y, 37%to i S volts (in proximatel se time ce y); the Fu secone wh n source on3; tage ,

C I is r.'uce i

$Functu bru ly to 8 volt relay,  %*

(inv rse t me cel approxt a- ly 10 seqeno ; and

e e/

)  !

> Functi n

  • ralav 9 in aporox1. telv 0 see) ' The runct1:n 2 ano 2 relays are inverse :1me ceiay relays.

These eiays ::erate along a repeatacle cnaracteristic curve. With relay operation being inverse 1!.'. time, for g (continuedi 1

, FEAPS UNIT 2 3 3.3-190 Revision No. 5

-. - - . . .- . .- - , = . . - -. . . . .

e INSERT C These relays monitor the following voltage levels with the following time delays: the Function 2 relay, 2286 - 2706 volts in approximately 2 seconds when source voltage is reduced abruptly to zero volts (inverse tirne delay); the Function 3 relay,3409 - 3829 volts in approximately 30 seconds when source voltage is reduced abruptly to 2940 volts (inverse time delay); the Function 4 relay,3766 - 3836 volts in +

approximately 10 seconds; and the Function 5 relay,4116 - 4186 volts in approximately 60 seconds.

i l

l I

l i

j LOP Instrument 8 tion 3.3.8.1 1

\

Table 3.3.8.1 1 (pose 1 of 1) 1 Less of Power Instesamentatten l l

1 l

REEIIRS reammet t REVEILLANs PINCTION atinuaare PER Bus Regulas erfs VALM 1 6 kV Emerpeney sus uruservettage (Lees of Vettage)

a. Bus unslorvettage 1 st 3.3.5.1.3 IIA st 3.3.8.1.6
2. & kV Seargersey tus urmerwitage *

(Deerseas Vettage Lou Setting)

~

a. Bus undervettage Z LI4 2*7 m e 2 st 3.3.8.1.1 1 tBAS.V are s 47t>V (1.per sa 3.3-8.1.2 source) st 3.3.8.1.4
b. Ylee petay 1. $

2 sa 3.3.8.1.1 t Av+ secenas ans (1 ku sa 3.3.8.1.2 3 4 ,9 secenas seurws sa 3.3.8.1.4

3. 4 kW Essegency sus underwatese 2./

(peorense Vettese Nish Setting)

a. Bus undervettage lee $ Jft$

2 SR 3.3.8.1.1 (1 per 1 5 M9-V ans s SetP V a 3.3.8.1.2 source) a 3.3.t.1.4

b. Tlas Detey 2.3. D 2 SE 3.3.8.1.1 (1 per 1 EFv4L seconos and a 3.3.8.1.2 s B 4 secones source) m 3.3.8.1.4
4. 4 kV Emergency Bus underwitage
[Dogrease Weltage LOCA)
s. Bus undervettese "J 7f,r-d 2 sa 3.3.8.1.1 3 E's to (1 per sa 3.3.8.1.2 3 sett V ano
  • 5795 L. -

source) st 3.3.8.1.4

. .a. . : . _ . o .- ==r et. i. a

' 3. ties Detey S. L 2 3R 3.3.8.1.1 (1 per 2 h econas ana sa 3.3.8.1.2 s t:e seconas i source) st 3.3.8.1.4 f p, S  ;

5. 4 kV Emergency Bus underwitage (Degresas Vettage non LOCA)
a. Bus unservottape A l I t,.

2 4 t ( L.

SR 3.3.8.1.1 e 4066 Y are s M Vg--

(1 per

, a 3.3.8.1.2 " -' i - - ' ' ' -

I source) st 3.3.8.1.4 -'-e--- -

I -*-4 ,4-eeeense--- - -

b. Ties celey f"10 (.4 2,. I a

2 (1 pee st 3.3.8.1.1 2 4P:? seconos ano s 45

, l l

\

PBAPS UNIT 3 3.3-65 4

Amenc:ent No. 214 5 l

i LDP Instrumentation B 3.3.8.1 i

q 8ASES (continued)

} l j APPLICABLE The LOP instrumentation is required for Engineered Safety l SAFETY ANALYSES, Features to function in any accident with a loss of offsite 4

LCO, and power. The required channels of LOP instrumentation ensure APPLICABILITY that the ECCS and other assumed systems powered from the

DGs, provide plant protection in the event of any of the J

Reference 1 (UFSAR) analyzed accidents in which a loss of i offsite power is assumed. The first level is loss of

, voltage. This loss of voltage level detects and disconnects

the Class IE buses from the offsite power source upon a
total loss of voltage. The second level of undervoltage

~  ;

protection is provided by the four levels of degraded grid '

3 voltage relays which are set to detect a sustained low voltage condition. These degraded grid relays disconnect  !

the Class IE buses from the offsite power source if the  ;

d degraded voltage condition exists for a time interval which could prevent the Class 1E aquipment from achieving its j safety function. The degraded grid relays also prevent the

Class IE equipment from sustaining damage from prolonged
operation at reduced voltage. The combination of the loss i

of voltage relaying and the degraded grid relaying provides protection to the Class 1E distribution system for all

! credible conditions of voltage collapse or sustained voltage '

!- degradation. The initiation of the DGs on loss of offsite '

power, and subsequent initiation of the ECCS, ensure that j the fuel peak cladding temperature remains below the limits i of 10 CFR 50.46.

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

! loss of offsite power during a loss of coolant accident.

! The diesel starting and loading times have been included in l l the delay time associated with each safety system component i I requiring DG supplied power following a loss of offsite l l power. l j The LOP instrumentation satisfies Criterion 3 of the NRC l Policy Statement.

The OPERABILITY of the LOP instrumentation is dependent upon  !

l l the OPERABILITY of the individual instrumentation relay l channel Functions specified.in Table 3.3.8.1-1. Eacn Function must have a required number of OPERABLE channels per 4 kV emergency bus, with their setpoints within the

. specified Allowaole Values except the bus unoervoltage relay

which does not have an Allowaole Value. A degraded voltage

. channel is inoperable if its actual trio semint H not l within its required Allowable Value.QS: ::n:! ::geint i: }

[ (continued) s mm Sec. Dw-j I PBAPS UNIT 3 B 3.3-188 Revision No. 5 L

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

P i  ?

4 r

x INSERT A ,

u Satpoots are calibrated consistent with the impmved insh . < it Setpoint Control Program (llSCP) ~  !

t methodology assumptions, i

+

r 4

A f

t 1 J

I R

4 J

4 e

i i

1 e

LOP Instrumentation B 3.3.8.1 BASES

[ c ,. _L 3 . A-APPLICABLE (;;;ur n ::7.:i:t::: ith :;;!i nt!: nt::t-t = t d 29 SAFETY ANALYSES,( 2r-"Mr.1The ioss of voItage enannel is inoperab' e if LCO, and it wf not start the diesel on a loss of power to a 4 kV APPLICABILITY emergency bus.

(continued)

The Allowable Values are specified for each applicable l Function in the Table 3.3.8.1-1. The nominal setpoints are selected to ensure that the setpoints do not exceed the Allowable Value between CHANNEL CALIBRATIONS. Operation l with a trip setpoint within the Allowable Value, is acceptable. Trip setpoints are those predetermined values of output at which an action should take place. The setpoints are compared to the actual process parameter (e.g., voltage), and when the measured output value of the

' process parameter exceeds the setpoint, the protective relay output changes state. The Allowable Values were set equal to the limitina values determined by the voltaoe regulation c_alculation) % nt;:ttt: .::= n rr x ed t: == d: Or T Sec ^

l,+ --My

,.. . , <,, irre ry, trt ,,p.

s, . a .. - ri; crt Mc"...ry, 3 . . . . .

M ;m-th'

.+ es u . 3.. , u .

LserT B i

7.,....[-.nade16d JFi setpoint assumes a nominal 35/i potential transformer ratio.

The specific Applicable Safety Analyses, LCO, and Applicability discussions for Unit 3 LOP instrumentation are listed below on a Function by Function basis.

In addition, since some equipment required by Unit 3 is powered'from Unit 2 sources, the Unit 2 LOP instrumentation supporting the required sources.must alt:o be OPERABLE. The OPERABILITY requirements for the Unit 2 LOP instrumentation is the same as described in this section, except Function 4 4

i (4 kV E:ergency Bus Undervoltage. Degraond Voltage LOCA) is not recuired to be OPERABLE, since this function is related i to a LOCA on Unit 2 only. The Unit 2 instrumentation is

}

listed in Unit 2 Table 3.3.8.1-1.

i I

l- 1. A kV Emeroency Bus Undervoltaae / loss of Voltaae)

When both offsite sources are lost, a loss of voltage condition on a 4 kV emergency bus indicates: that the respective emergency bus is unable to supply sufficient power f:r proper operation of the applicable equipment.

Therefore, the power supply to the bus is transferred from offsite power to DG power. This ensures that adeouate power will be available to the requireo equipment.

(continued) l PBAPS UNIT 3 8 3.3-189 Revision No. 5

\ -

INSERTB .

The setpoints were corrected using IISCP methodology to acc.ount for relay drift, relay accuracy, potential transformer accuracy, measuring and test equipment accuracy margin, and includos a

. calibration leave alone zone. IISCP methodology utilizes the square root of the sum of the squares to combine random non-directional accuracy values. IISCP then includes relay drift, calibration leave alone

' zones, and margins.

I t

I i

1 1

i l

j e

LOP Instrumentation B 3.3.8.1 l

l BASES APPLICA8LE 1. 4 kV Emeroency Bus Undervoltaae (Loss of Voltaae)

SAFETY ANALYSIS, (continued)
- LCO, and l APPLICABILITY The single channel of 4 kV Emergency Bus Undervoltage (Loss i of Voltage) Function per associated emergency bus is only
required to be OPERABLE when the associated DG and offsite j circuit are required to be OPERA 8LE. This ensures no single instrument failure can preclude the start of three of four DGs. (One channel inputs to each of the four DGs.) Refer l l to LCO 3.8.1, "AC Sources-Operating," and 3.8.2, "AC 4
Sources-Shutdown," for Applicability Bases for the DGs. {

4

2. 3. 4. 5. AkV Emeroency Bus Undervoltaae (Dearaded

) Voltaael 1

l A degraded voltage condition on a 4 kV emergency bus indicates that, while offsite power may not be completely I l

lost to the respective emergency bus, available power may be '

insufficient for starting large ECCS motors without risking i damage to the motors that could disable the ECCS function. l

I

! Therefore, power to the bus is transferred from offsite l l power to onsite DG power when there is insufficient offsite i

power to the bus. This transfer will occur only if the

! l voltage of the preferred and alternate power sources drop l below the Degraded Voltage Function Allowabie Values

(degraded voltage with a time delay) and the source breakers
trip wnich causes the bus undervoltage relay to initiate the
' DG. This ensures that adequate. power will be available to the required equipment.

Four Functions are provided to monitor degraded voltage at four different levels. These Functions are tne Degraded Voltage Non-LOCA, Degraded Voltage LOCA, Degracted Voltage High setting, and Degraded Voltage Low Settina./These p g.iaysmoni r.the foil tqg volta foi owing ime eyels with\the

, lays: the Functi 2 elay, 0%\n /

[See

\

I appr i tely 2 s ce s when ou1 abrupt to zero y e vol ge s reduced /

dela ' , the Function 3 N M# s (invers ;ime relay  % in appr mately 30 conds wh Nsource v' tage l (q is r duce abrup yt Fu tion 4 ela,89%g84vol 1 app xima ly

( nyerse img delay ; 'the seconds

  • and the etion 5 r , 98% in pyroximate y _0 secorit! .fThe Function 2 ano a relays are mvune dine delay relays.

These relays operate along a repeatable characteristic curve. With relay operation being inverse with time, for (continued)

PBAPS UNIT 3 8 3.3-190 Revision No. 5

)

f f

l l

l

! INSERT C

, These relays monitor the following voltage levels with the following time delays: the Function 2 relay, 4

2286 - 2706 volts in approximately 2 seconds when source voltage is reduced abruptly to zero volts . ., ;

(inverse time delay); the Function 3 relay,3409 - 3829 volts in approximately 30 seconds when source >

voltage is reduced abruptly to 2940 volts (inverse time delay); the Function 4 relay, 3766 - 3836 volts in -

approximately 10 seconds; and the Function 5 relay,4116 - 4186 volts in approximately 60 seconds.

~4 s

i i

r f

i i

4 I

i e

I

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