ML20117L289

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Proposed Tech Specs 3.3.5.1, ECCS Instrumentation, & 3.8.1, AC Sources-Operating
ML20117L289
Person / Time
Site: Peach Bottom  Constellation icon.png
Issue date: 09/06/1996
From:
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
Shared Package
ML20117L284 List:
References
NUDOCS 9609130097
Download: ML20117L289 (22)
v • d • e


Text

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ATTACHMENT 2 i

PEACH BOTTOM ATOMIC POWER STATION UNITS 2 and 3  !

1 Docket No. 50-277 50-278 Ucense No. DPR-44 DPR-56 i

j Facility Operating Ucense Change Request ECR 96-03093 i Changes to Technical Specifications Sections 3.3.5.1, "ECCS Instrumentation," l and 3.8.1, "AC Sources-Operating" l Ust of Revised Pages I

Unit 2 Unit 3 4 3.3-39 3.3-39 j 3.3-40 3.3-40

. 3.8-7 3.8-7

3.8-9 3.8-9 3.8-11 3.8-11 i 3.8-12 3.8-12.

3.8-16 3.8-16 4

3.8-19 3.8-19 l- B 3.3-92 B 3.3-93

! B 3.3-94 B 3.3-94

! B 3.3-103 B 3.3-104 l B 3.3-106 B 3.3-107

B 3.8-18 B 3.8-18 i B 3.8-19 B 3.8-19 i B 3.8-28 B 3.8-28 l B 3.8-30 B 3.8-30 B 3.8-35 B 3.8-35
B 3.8-38 8 3.8-38 i

~

9609130097 960906 PDR ADOCK 05000277

P PDR

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ECCS Instrumentation j 3.3.5.1

Table 3.3.5.1-1 (page 1 of 5)

Emergency Core Cooling system Instrumentation APPLICABLE CONDITIONS MIBEs REQUIRED REFERENCED OR OTNER CHANNELS FROM sPECIFIED PER REQUIRED SURVEILLANCE ALLOWABLE FUNCTION COWITIOMs FUNCTION ACTION A.1 REQUIRDENTS VALUE

1. Core spray system
a. Reactor vessel Water 1,2,3, 4(b) e st 3.3.5.1.1 1 -160.0 Levet .-Low Low Low st 3.3.5.1.2 inches (Level 1) 4(*), 5(*) st 3.3.5.1.4 sa 3.3.5.1.5
b. Drywell 1,2,3 4(b) a st 3.3.5.1.1 s 2.0 pois Pressure --Mish st 3.3.5.1.2 st 3.3.5.1.4 st 3.3.5.1.5
c. Reactor Pressure --Low 1,2,3 4 C st 3.3.5.1.1 a 425.0 psis (Injection Permissive) st 3.3.5.1.2 and

' st 3.3.5.1.4 s 475.0 psis SR 3.3.5.1.5 4(a), $(a) 4 s SR 3.3.5.1.1 a 425.0 pois SR 3.3.5.1.2 and SR 3.3.5.1.4 s 475.0 psis at 3.3.5.1.5

d. Core spray Pump 1,2,3, 4 E sa 3.3.5.1.2 1 319.0 paid Discherse Flow -4ou (1 per sa 3.3.5.1.4 and (typass) 4(*), 5(*) pump) s 351.0 psid e .. Core spray Puup start- 1,2,3 4 C st 3.3.5.1.4 a 5.0 seconds Tlee Delay Relay (loss '

(1 per SR 3.3.5.1.5 and of offsite power) 4(a),5(a) pump) s 7.0 seconds

f. Core spray Puup start-Tlas Delay Relay (offsite power available)

Puups A,C 1,2,3 2 C st 3.3.5.1.4 2 12.1 (1 per sa 3.3.5.1.5 4(a), 5(a) ,,,,3 secondsand[

g g3,9 seconds Puups B,0 1,2,3 2 C st 3.3.5.1.4 2 21.4 (1 per SR 3.3.5.1.5 secondsand(p 4(a), 5(*) puup) s 24.6 .

seconds (continued)

(a) When associated stheystem(s) are re gired to be OPERABLE.

J (b) Also required to initiate the associated diesel generator (DG).

CD Allwalle valaes ud ap ic.uk l & wpcodec/ pay n n u ., i ., c, .

PBAPS UNIT 2 t 3 3.3-39 Amendment No. 210

, ECCS Instrumentation 3.3.5.1

~

Table 3.3.5.1 1 (page 2 of 5)

Emergency Core Cooling system Instrumentation APPLICAsLE CONDITIONS MODES REQUIRED REFERENCED OR OTNER CHANNELS FROM SPECIFIED PER REQUIRED SURVEILLANCE ALLOWAsLE l FUNCTION CONDITIONS FUNCTION ACTION A.1 REQUIREDENTS VALUE

2. Low Pressure Coolant Injection (LPCI) system
a. Reactor vesset Water 1,2,3, 4 s sa 3.3.5.1.1 1 -160 inches Level --Low Low Low st 3.3.5.1.2 (Level 1) 4(*), 5(a) st 3.3.5.1 A st 3.3.5.1.5
b. Drywell 1,2,3 4 s SR 3.3.5.1.1 5 2.0 pois Pressure -Nigh SR 3.3.5.1.2 SR 3.3.5.1.4 SR 3.3.5.1.5
c. Reactor Pressure -Low 1,2,3 4 C SR 3.3.5.1.1 1 425.0 psig (Injection Permissive) e SR 3.3.5.1.2 and SR 3.3.5.1.4 5 475.0 psig sa 3.3.5.1.5 4(*), 5(*) 4 s sa 3.3.5.1.1 2 425.0 psig st 3.3.5.1.2 ar:d st 3.3.5.1.4 s 475.0 psig 1,R 3.3.5.1.5
d. Reactor Pressure -Low 1(*),2I *I, 4 C sa 3.3.5.1.1 2 211.0 pois Low (Recirculation 3.3.5.1.2 Discharge valve 3(c) s ,t g 3,3,5,3,4 Permissive) ER 3.3.5.1.5
e. Reactor vesset shroud 1,2,3 2 8 st 3.3.5.1.1 2 226.0 Level-Levet 0 SR 3.3.5.1.2 imhes SR 3.3.5.1.4 st 3.3.5.1.5
f. Low Pressure Coolant 1,2,3, s C SR 3.3.5.1.4 injection Puup ' (2 per st 3.3.5.1.5 start -Time Detey 4(a), $(s) pump)

Relay (offsite power ,

avellable) '

Pumps A,8 1 1.9 seconds and 5 2.1 h

seconds Pumps C,0 t7.5secondshk$)

and 5 s.5 seconds

g. Low Pressure Coolant 1,2,3 4' E SR 3.3.5.1.2 1 299.0 psid l Injection Pulp (1 per SR 3.3.5.1.4 and Discharge Flow -Low 4(a), $(s) puip) SR 3.3.5.1.5 5 331.0 psid (typass)

(continued)

(a) When associated subsystem (s) are required to be OPERAsLE.

(c) With associated recirculation pulp discharge velve open.

(O Mkdle va' lves ne4 apphev4/e & h assectaY41'cI pasrp Wh*h N bCr u it 4 rd muc{e anc{ coweedic(-lo (fs enesyenej intS-D Milnlle valass ud upf acdk wk assecw/dpay is m'u~my, \

PBAPS UNIT 2 4 S 3.3-40 Amendment No. 210 4

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AC Sources-0perating 3.8.1 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.1.2 -------------------NOTES-------------------

1. Performance of SR 3.8.1.7 satisfies this SR.
2. All DG starts may be preceded by an engine prelube period and followed by 1 a warmup period prior to loading.
3. A modified DG start involving idling

! and gradual acceleration to synchronous speed may be used for this SR as recommended by the manufacturer.

When modified start procedures are not ,

used, the time, voltage, and frequency

. tolerances of SR 3.8.1.7 must be met. l

4. A single test at the specified Frequency will satisfy this Surveillance for both units.

l G starts from standby 31 days Verifyeac[andachievessteadystate conditiorg voltage m 4160 V and s 4400 V and frequency k 58.8 Hz and s 61.2 Hz.

N- v v v -

(continued)  :

S.

J/ch Wf aoNO bt ilt ?$~ 4)N+% b (r /S IH 014 he)h les e, .

f 3.8-7 Amendment No. 210 PBAPS UNIT 2 A 3 ad

I ,

AC Sources-Operating 3.8.1 1

SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY 1

SR 3.8.1.6 Verify the fuel oil transfer system 31 days I operates to automatically transfer fuel oil l from storage tank to the day tank.

SR 3.8.1.7 -------------------NOTES-------------------

l 1. All DG starts may be preceded by an engine prelube period.

2. A single test at the specified Frequency will satisfy this ,

. Surveillance for both units.

7: .........................................

Verify each DG starts from standby 184 days condition and achieves, in s 10 seconds, voltage m 4160 V and frequency k 58.8 Hz, and after steady state conditions are reached, maintains voltage a 4160 V and s 4400 V and frequency a 58.8 Hz and s 61.2 Hz.

SR 3.8.1.8 ------------------NOTE--------------------

This Surveillance shall not be performed in MODE 1 or 2. However, credit may be taken for unplanned events that satisfy .

this SR.

Verify automatic and manual transfer of the 24 months  !

' unit power supply from the normal offsite circuit to the alternate offsite circuit.

v W w (continued)

S Lbh mprYb k we+ tuhm h (, is m

+4o +ef male.

A l

l P8APS UNIT 2 4 3 3.8-9 Amendment No. 210 i

! . i AC Sources-Operating 3.8.1 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY

)

SR 3.8.1.11 -------------------NOTES-------------------

1. All DG starts may be preceded by an engine prelube period.
2. This Surveillance shall not be performed in MODE 1, 2, or 3.

However, credit may be taken for unplanned events that satisfy this SR.

I Verify on an actual or simulated loss of 24 months offsite power signal:

l

a. De-energization of emergency buses;
b. Load shedding from emergency buses; and
c. DG auto-starts from standby condition and: .
1. energizes associated 4 kV emergency bus in s 10 seconds,

/ 2. energizes auto-connected shutdown loads through individual load timers,

3. maintains steady state. voltage a 4160 V and s 4400 V,
4. maintains steady state frequency a 58.8 Hz and s 61.2 Hz, and

'5. supplies auto-connected shutdown loads for k 5 minutes.

. ^"c ,

'x m y (continued)

% x44 9mcf -lo bt 8e+ cam 6 (,.

U /'1 Nf [v.) h k'1 F i

3.8-11 Amendment No. 210 PBAPS UNIT 2 4 3

\ .. l 4

AC Sources-Operating 3.8.1 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY i

SR 3.8.1.12 -------------------NOTE--------------------

t f, All DG starts may be preceded by an engine prelube period.

Verify on an actual or simulated Emergency 24 months Core Cooling System (ECCS) initiation signal each DG auto-starts from standby condition and:

a. In s 10 seconds after auto-start l achieves voltage m 4160 V, and after steady state conditions are reached, maintains voltage m 4160 V and s 4400 V;
b. In s 10 seconds after auto-start achieves frequency a 58.8 Hz, and after steady state conditions are reached, maintains frequency a 58.8 Hz ,

and s 61.2 Hz;

c. Operates for a 5 minutes;
d. Permanently connected loads remain energized from the offsite power system; and
e. Emergency loads are energized or auto-connected through individual load timers from the offsite power system.

I h N (continued) l f, LV 9vuY h be me+ UW D 6- U m no hd ~4.

l l

l l

PBAPS UNIT 2 k} 3.8-12 Amendment No. 210 4

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AC Sources-Operating 3.8.1 l SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY l

l l

SR 3.8.1.16 -------------------NOTE-------------------- i This Surveillance shall not be performed in J MODE 1, 2, or 3. However, credit may be taken for unplanned events that satisfy this SR.

Verify each DG: -

24 months

a. Synchronizes with offsite power source while loaded with emergency loads upon a simulated restoration of offsite '

power;

b. Transfers loads to offsite power source; and
c. Returns to ready-to-load operation.

SR 3.8.1.17 -------------------NOTE--------------------

f, A single test at the specified Frequency will satisfy this Surveillance for bath units.

-y ...............-...........................

Verify with a DG operating in test mode and 24 months connected to its bus, an actual or simulated ECCS initiation signal overrides the test mode by:

a. Returning DG to ready-to-load operation; and
b. Automatically energizing the emergency load from offsite power.

W _ . -

(continued)

. x4fevp,.r/-kle aef as/e.s3 -&

bG-15 ewah/H 11 k9 ed h He'ck C!w Cessnec, y ) h } k ba) ,

^ A 3.8-16 Amendment No. 210 PBAPSUNIT2.}.3 f

i- . .

AC Sources-Operating 3

1 3.8.1 l SURVEILLANCE REQUIREMENTS (continued)

! SURVEI!. LANCE FREQUENCY SR 3.8.1.20 -------------------NOTES-------------------

! 1. All DG starts may be preceded by an j engine prelube period.

! 2. A single test at the specified

! Frequency will satisfy this 3___.. Surveillance for both units.

i Verify, when started simultaneously from 10 years standby condition, each DG achieves, in

s; 10 seconds, voltage k 4160 V and frequency a 58.8 Hz. '

SR 3.8.1.21 -------------------NOTE--------------------

When Unit 3 is in MODE 4 or 5, or moving i irradiated fuel assemblies in the secondary  !

containment, the Note to Unit 3 SR 3.8.2.1 is applicable.

For required Unit 3 AC sources, the SRs of In accordance Unit 3 Specification 3.8.1, except with applicable  !

i SR 3.8.1.8 (when only one Unit 3 offsite SRs  !

t circuit is required), SR 3.8.1.12, '

SR 3.8.1.13, SR 3.8.1.17, SR 3.8.1.18 (ECCS l load block requirement only), and  ;

SR 3.8.1.19, are applicable.

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$o k hof ang k kre t cubn b 6- 15

/H h4 hfdY hv P'.

PBAPS UNIT 2 4-3 3.8-19 Amendment No. 210

i i BASES 4

i BACKGROUND The purpose of the ECCS instrumentation is to initiate j appropriate responses from the systems to ensure that the i

fual is adequately cooled in the event of a design basis

- accident or transient.

l For most abnormal operational transients and Design Basis J

} n

\ s Accidents (DBAs), a wide range of dependent and independent l s parameters are monitored.

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)wf hj s

The ECCS instrumentation actuates core spray (CS), low pressure coolant injection (LPCI), high pressure coolant injection (HPCI), Automatic Depressurization System (ADS),

1 U: 8' and the diesel generators (DGs). The equipment involved l k with each of these systems is described in the Bases for l 9 9 9 LC0 3.5.1, "ECCS-Operating."

jg j l

Core Sorav System j y {

l S b -

The CS System may be initiated by automatic means.

i >' ' Automatic initiation occurs for conditions of Reactor Vessel 4 Water Level-Low Low Low (Level 1) or Drywell Pressure-High j, 13 2 with a Reactor Pressure-Low permissive. The reactor vessel

! 24*

M g water level and the reactor pressure variables are monitored q s by four redundant transmitters, which are, in turn,

{ ^ r connected to four pressure compensation instruments. The t

%? , drywell pressure variable is monitored by four redundant transmitters, which are, in turn, connected to four trip

[

I g

g

%( iD m* j units. The outputs of the pressure compensation instruments and the trip units are connected to relays which send

\ ,~ f / signals to two trip systems, with each trip system arranged

( 4 in a one-out-of-two taken twice logic (each trip unit sends

( g f g my y{ $ a signal to both trip systems.) Each trip system initiates two of the four CS pumps.

y4 2g upon receipt of an initiation signal, if normal AC power is

)

' available, CS pumps A and C start after a time delay of 3

I av

[4 ; <>~ approximately 13 seconds and CS pumps B and D start after a time delay of approximately 23 seconds. If normal AC power is not available, the four CS pumps start simultaneously

- v 3 t Q c after a time delay of approximately 6 seconds after the respective DG is ready to load, g

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(continued)

PBAPS UNIT 2 B 3.3-92 Revision No. 0 (f3 U $

ECCS Instrumentation

[ - B 3.3.5.1 l

-m BASES 2

7-  %

8

%ACKGROUND low pressure Coolant Iniection System (continued)

% e Upon receipt of an initiation signal if normal AC power is f j i h.Ns available, the LPCI A and B pumps start after a delay of i

approximately 2 seconds. The LPCI C and D pumps are started ,

t \,

l/ { }Q ;

3 i

after a delay of approximately 8 seconds. If normal AC power is not available, the four LPCI pumps start l

l{ - 7 ,

I

s  % simultaneously with no delay as soon as the standby power source is available. j '

ld 'b

  • j % (f Each LPCI subsystem's discharge flow is monitored by a l

Ng j g-N - differential pressure indicating switch. When a pump is running and discharge flow is low enough so that pump N J fHq h b overheating may occur, the respective minimum flow returi.

v eM Q  : line valve is opened. If flow is above the minimum flow

.K S ,g Q setpoint, the valve is automatically closed to allow the full system flow assumed in the analyses.

1 7M e o

'b + b, \{  ;

The RHR test line suppression pool cooling isolation valve, I

,y V

\ \

suppression pool spray isolation valves, and containment P )

! 7, 2 v spray isolation valves (which are also PCIVs) are also .

j' s rM h,.R,g/ j closed on a LPCI initiation signal to allow the full system flow assumed in the accident analyses and maintain primary 1,t 6 (gy g \

I 3

i containment isolated in the event LPCI is not operating.  ;

l

! 0  : The LPCI System monitors the pressure in the reactor to

!6 QD lvq% 7  ? ensure that, before an injection valve opens, the reactor j y1g l ( pressure has fallen to a value below the LPCI System's l r 4 ,+ maximum design pressure. The variable is monitored by four

' redundant transmitters, which are, in turn, connected to l *h O d ,y four pressure compensation instruments. The outputs of the

g 1 pressure compensation instruments are connected to relays i N s 7 whose contacts are arranged in a one-out-of-two taken twice j .f 5

h -8

  • q D yg +' M logic. recirculation Additionally, instruments are provided to close the pump discharge valves to ensure that LPCI flow

% j c does not bypass the core when it injects into the M f a

Mi Y recirculation lines. The variable is monitored by four I

y redundant transmitters, which are, in turn, connected to

{

/

t 19 eQ' d 3N four pressure compensation instruments. The outputs of the 4 pressure compensation instruments are connected to relays

( g [ ]N we

5. b (s whose contacts are arranged in a one-out-of-two taken twice (su 3 jogge, (continued)

B 3.3-94 Revision No. 0 PBAPS UNIT 2 4 3

, --- -- , v , -

a

ECCS Instrumentation

' ' B 3.3.5.1 BASES APPLICABLE 1.d. 2.a. Core Sorav and Low Pressure Coolant In.iection l SAFETY ANALYSES Pumo Discharae Flow-low (Bvoass) (continued)

Q LCO, and CS Pump Discharge Flow-Low Functions are assumed to be n XAPPLICABILITYOPERABLE and capable of closing the minimum flow valves to 4 ensure that the low pressure ECCS flows assumed during the

\ transients and accidents analyzed in References 1, 2, and 3 T 'are met. The core cooling function of the ECCS, along with

)o g 4 I

0 ( '

the scram action of the'RPS, ensures that the fuel peak cladding temperature remains below the limits of l l

7 i ,

10 CFR 50.46. l s

t t I One differential pressure switch per ECCS pump is used to l

% Q g,

detect the associated subsystems' flow rates. The logic is i l 2 arranged such that each switch causes its associated minimum 5 flow valve to open. The logic will close the minimum flow

(' h (q& .-

valve once the closure setpoint is exceeded. The LPCI minimum flow valves are time delayed such that the valves g, 4 -

will not open for 10 seconds after the switches detect low Yw w

2) flow. The time delay is provided to limit reactor vessel inventory loss during the startup of the RHR shutdown Ns Q(

s cooling mode. The Pump Discharge Flow-Low Allowable Values Qq (\j q are high enough to ensure that the pump flow rate is sufficient to protect the pump, yet low enough to ensure T 9' that the closure of the minimum flow valve is initiated to l allow full flow into the core.

{

Each channel of Pump Discharge Flow-Low Function (four CS Q

g, channels and four LPCI channels) is only required to be yn d .\ OPERABLE when the associated ECCS is required to be OPERABLE

'd?s  ;

to ensure that no single instrument failure can preclude the 5 ECCS function. Refer to LCO 3.5.1 and LCO 3.5.2 for (I

3 4e *'

h Applicability Bases for the low pressure ECCS subsystems.

I

%n Core Sorav pumo Start-Time Delav Relav 1.e. 1.f.

Y The purpose of this time delay is to stagger the start of the CS pumps that are in each of Divisions I and II to d3 -

> !p a prevent overloading the power source. This Function is

l. y y% } t necessary when power is being supplied from the offsite

, r sources or the standby power sources (DG).4 The CS Pump I

g, g Start-Time Delay Relays are assumed tole OPERABLE in the

-f ' b b d dV accident and transient analyses requiring ECCS in hat is, the analyses assume that the pumps will initiate when required and excess loading will not cause failure of)

_he power sources f 4pg h ucow v IwJ SW - 4% c[ w // ud rou/[ (continuedi l'1 b'WN hac/!y ev /eLS & all-sdc Sowce B 3.3-103 Revision No. 0 PBAPS UNIT 2 fun t/3

,-r .. -

ECCS Instrumentation B 3.3.5.1 BASES APPLICABLE 2.e. Reactor Vessel Shroud Level-level 0 (continued)

SAFETY ANALYSES, LCO, and Two channels of the Reactor Vessel Shroud Level-Level 0 APPLICABILITY Function are only required to be OPERABLE in MODES 1, 2, and 3. In MODES 4 and 5, the specified initiation time of the LPCI subsystems is not assumed, and other administrative centrols are adequate to control the valves associated with this Function (since the systems that the valves are opened for are not required to be OPERABLE in MODES 4 and 5 and are normally not used).

2.f. Low Pressure Coolant Iniection Pumo Start-Time Delav EtlAX The purpose of this time delay is to stagger the start of the LPCI pumps that are in each of Divisions I and II, to f]

prevent overloading the power source. This Function is only SW g, necessarywhenpowerisbeingsuppliedfromoffsitesources.*h 4g/.5 6,,-f a vl,,/, --- -;P / The LPCI pumps start simultaneously with no time delay as

> soon as the standby source is available. The LPCI Pump

, Start-Time Delay Relays are assumed to be OPERABLE in the i

accident and transient analyses requiring ECCS initiation.

That i;, th; :::1y::: ::: n th:t th: F: ei'l inititt: #

7::;;ir:d : d em #

l - ,

-the per :::r:::.#@ leading will r,et ;;;;; failur; Of There are eight LPCI Pump Start-Time Delay Relays, two in each of the RHR pump start logic circuits. Two time delay relays are dedicated to a single pump start logic. Both

, timers in the RHR pump start logic would have to fail to prevent an RHR pump from starting within the required time; therefore, the low pressure ECCS pumps will remain OPERABLE; thus, the single failure criterion is met (i.e., loss of one instrument does not preclude ECCS initiation). The Allowable Values for the LPCI Pump Start-Time Delay Relays i are chosen to be long enough so that most of the starting transient of the first pump is complete before starting the second pump on the same 4 kV emergency bus and sheet enough so that ECCS operation is not degraded. t Each channel of LPCI Pump Start-Time Delay Relay Function is required to be OPERABLE only when the associated LPCI subsystem is required to be OPERABLE. Refer to LCO 3.5.1 and LCO 3.5.2 for Applicability Bases for the LPCI subsystems.

(continued)

PBAPS UNIT 2 Q B 3.3-106 Revision No. 0

/07 43 i

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p u ~p  % h qi, 0 m. k,, ch {y tv w e \

ua pg a .,uc4 9 , an c6d

/is assuc e,le/ 2 G4- Me ck I<7' ~ Lf a aJ e .C u~ .sy . -, ce 6 <a e & pc~p a ,lincy l sp w,/~9

$ kle cor a ly)+3 cen e lu/e $r f N!< f"Y' sk+ oc s pw la,/ cs,cA L n v/l tid n3<<(+ m e x c r .s h 6 +c l<,y as /s.s s s,S e 4;< 6 scy-ce ,

i a

3 3 .

2 AC Sources-Operating j B 3.8.1 j -

l BASES j

ACTIONS lid i (continued)

Condition H corresponds to a level of degradation in which redundancy in the AC electrical power supplies has been i

lost. At this severely degraded level, any further losses

! in the AC electrical power system may cause a loss of i

1 function. Therefore, no additional time is justified for continued operation. The unit is required by LCO 3.0.3 to j

commence a controlled shutdown.

SURVEILLANCE The AC sources are designed to permit inspection and

REQUIREMENTS testing of all important areas and features, especially those that have a standby function, in accordance with j UFSAR, Section 1.5.1 (Ref. 7). Periodic component tests are i supplemented by extensive functional tests during refueling i outages (under simulated accident conditions). The SRs for i

4 demonstrating the OPERABILITY of the DGs are consistent with ,

the recommendations of Regulatory Guide 1.9 (Ref. 3),  !

. Regulatory Guide 1.108 (Ref j (Ref. 9)y wW W app hcvMr ,8), and Regulatory Guide 1.137

, 1 4 As Noted at the beginning of the SRs, SR 3.8.1.1 through l SR 3.8.1.20 are applicable only to the Unit 2 AC sources and SR 3.8.1.21 is applicable only to the Unit 3 AC sources.

c l

i Where the SRs discussed herein specify voltage and frequency tolerances, the following summary is applicable. The minimum steady state output voltage of 4160 V corresponds to j the minimum steady state voltage analyzed in the PBAPS j emergency DG voltage regulation study. This value allows i for voltage drops to motors and other equipment down through i the 120 V level. The specified maximum steady state output i

4 voltage of 4400 V is equal to the maximum steady state operating voltage specified for 4000 V motors. It ensures that for a lightly loaded distribution system, the voltage at the terminals of 4000 V motors is no more than the maximum rated steady state operating voltages. The j specified minimum and maximum frequencies of the DG are 3

58.8 Hz and 61.2 Hz, respectively. These values are equal to 2% of the 60 Hz nominal frequency and are derived from the recomendations found in Regulatory Guide 1.9 (Ref. 3).

(continued) i j

i i

PBAPS UNIT 2 Q B 3.8-18 Revision No. 0 i

AC Sources-Operating i B 3.8.1 IN J Y $l -

f }c h } BASES l N 4 SURVEILLANCE SR 3.8.1.1 4 4 REQUIREMENTS tf g

[( 4 s (continued) This SR ensures proper circuit continuity for the offsite AC electrical power supply to the onsite distribution network S 7 7 and availability of offsite AC electrical power. The tT IT$ breaker alignment verifies that each breaker is in its I

bD correct position to ensure that distribution buses and loads

'Qc

?'

>Qq

{

3 l are connected to their preferred power source and that appropriate independence of offsite circuits is maintained.

I g .hqn4 The 7 day Frequency is adequate since breaker position is D ev not likely to change without the operator being aware of it 4 i

, and because its status is displayed in the control room.

9i 5 g 1 y T SR 3.8.1.2 and SR 3.8.1.7 -

,j 4 4 -S } $ These SRs help to ensure the availability of the standby electrical power supply to mitigate DBAs and transients and yksyyvJQ-K maintain the unit in a safe shutdown condition.

I

  • To minimize the wear on moving parts that do not get 4 lubricated when the engine is not running, these SRs have k @do g $ e a been modified by a Note (Note 2 for SR 3.8.1.2 and Note 1 hr1 [%

& ~Y for SR 3.8.1.7) to indicate that all DG starts for these

' dh gg Surveillances may be preceded by an engine prelube period and followed by a warmup prior to loading.

~$ 4 o *5* For the purposes of this testing, the DGs are started from i n r-j & _

standby conditions.a Standby conditions for a DG sean that the ciesei engine coolant and oil are being continuously l I 9' circulated and temperature is being maintained consistent l

4 4  !

[ 4Nr(4 s with manufacturer recommendations.

In order to reduce stress and wear on diesel engines, the l

l y q .) fd manufacturer recommends a modified start in which the I t

>a 4J er w9 A

/ starting speed of DGs is limited, warmup is limited to this 1 lower speed, and the DGs are gradually accelerated to 5 I synchronous speed prior to loading. These start procedures l q Q g,~9,Q g b y ' are the intent of Note 3 to SR 3.8.1.2, which is only g M I5 I applicable when such modified start procedures are recommended by the manufacturer.

4s 3, I k U ~

  • # f f SR 3.8.1.7 requires that, at a 184 day Frequency, the DG i

f

$ *k i #q starts from standby conditions and achieves required voltage and frequency within 10 seconds. The minimum voltage and frequency stated in the SR are those necessary to ensure the

! (continued) i PBAPS UNIT 2 }- 3 B 3.8-19 Revision No. 0 4

. . AC Sources-Operating

B 3.8.1 l -

BASES SURVEILLANCE SR 3.8.1.11 (continued) i 1

REQUIREMENTS

The requirement to verify the connection and power supply of

! -auto-connected loads is intended to satisfactorily show the l relationship of these loads to the DG loading logic. In i' 1

certain circumstances, many of these loads cannot actually

! be connected or loaded without undue hardship or potential

! for undesired operation. For instance, Emergency Core

! Cooling Systems (ECCS) injection valves are not desired to '

i be stroked open, or systems are not capable of being  ;

l operated at full flow, or RHR systems performing a decay  !

i heat removal function are not desired to be realigned to the i ECCS mode of operation. In lieu of actual demonstration of ,

the connection and loading of these loads, testing that

! adequately shows the capability of the DG system to perform

these functions is acceptable. This testing may include any

! series of sequential, overlapping, or total steps so that

! the entire connection and loading sequence is verified.

1 The Frequency of 24 months takes into consideration plant  !

I conditions required to perform the Surveillance, and is intended to be ~ consistent with expected fuel cycle lengths.

ThisSRismodifiedbyhYotes. The reason for Note 1 is

to minimize wear and tear on the DGs during testing. For l l the purpose of this testing, the DGs shall be started from i standby conditions, that is, with the engine coolant and oil )

! being continuously circulated and temperature maintained

, consistent with manufacturer recommendations. The reason

! for Note 2 is that performing the Surveillance would remove j a required offsite circuit from service, perturb the

electrical distribution system, and challenge safety l systems. This Surveillance tests the applicable logic
associated with Unit 2. The cor.s a rable test specified in

! the Unit 3 Technical Specifications tests the applicable logic associated with Unit 3. Consequently, a tes j performed within the specified Frequency for unit. each ,tAsmust be i the Surveillance represents separate tests, the Note i Nu/C specifying the restriction for not performing the test while the unit is in MODE 1, 2, or 3 does not have applicability to Unit 3. The Note only applies to Unit 2, thus the Unit 2 Surveillances shall not be performed with Unit 2 in MODE 1,

2, or 3. Credit may be taken for unplanned events that satisfy this SR.
(continued)

! q i

i l PBAPS UNIT 2 B 3.8-28 Revision No. 1 l I

/4MacG%ef k s3.e-as

& 4e ernson G Ae}e 3 oA incln ah 7LI Ac s2 a ,4 ~pivcfh he ai d A , Mic 6 c-1.5 , +l c kJ f t<ucle. tubon & h c- a n 40 i

hd .

M nic, i/ 4es a lec.

ac4m.u/va}ef Gepr.,cya,efus/Lle y de< by' tua thy if l Stc quLle w[ a,le->h ding.Com & .

Skclyc~Msv.

17 v1a8va[cpeNe acd<un ivy Acueefwkvu h h (- is posOf m c, in de hd mocle, n

//eu ,1 e u Lw /rc ac /v,, u Lc6 v<t/ tw,,, 4 ,,  ;

140 h & epm,J/e. ksuc / ac he is w,uim/

. Cow c /c,3 u e.e a[ da bC- eu I,od Jm /6,(s)

Open v u <,p t e b ~ A cwP t.A & 66 in 4 bd macle , 1% pr ,[u" acks w<ll 3 e acl~1,o/ A ~ ty c 4.an/ hy pc ec&<a.

l 1

AC Sources-0psrating 3 3 y ,

B 3.8.1 l 4z BASES D

54 SURVEILLANCE SR 3.8.1.12 (continued) h EQUIREMENTS

-4 g The Frequency of 24 months takes into consideration plant

)

  • k{.3 I

conditions required to perform the Surveillance and is intended to be consistent with the expected fuel cycle y

-w 3

s D.

%, lengths.

wo 4.

l[

l T

d go q This SR is modified byX Notef' The reason for hl Note ^1s to minimize wear and tear on the DGs during testing. For I g" c a

f Ng *Q .

the purpose of this testing, the DGs must be started from standby conditions, that is, with the engine coolant and oil being continuously circulated and temperature maintained y

d{BiM k g consistent with manufacturer recommendations.

l  % ~L hY

[ SR 3.8.1.13

, y y cy v D

v Consistent with Regulatory Guide 1.9 (Ref. 3),

y4 b

{ paragraph C.2.2.12, this Surveillance demonstrates that DG non-critical protective functions (e.g., high jacket water t

g k* 4' temperature) are bypassed on an ECCS initiation test signal and critical protective functions (engine overspeed, f2 %r >

  • generator differential overcurrent, generator ground neutral i

overcurrent, and manual cardox initiation) trip the DG to l

(44o b YS e4 avert substantial damage to the DG unit. The non-critical trips are bypassed during DBAs and continue to provide an jd I1 i R  % alarm on an abnormal engine condition. This alarm provides the operator with sufficient time to react appropriately.

M The DG availability to mitigate the DBA is more critical s '

  • K v{ than protecting the engine against minor problems that are
t. {kj4 not immediately detrimental to emergency operation of the b $ e The 24 month Frequency is based on engineering judgment, 3

9 4 takes into consideration plant conditions required to esW perform the Surveillance, and is intended to be consistent 4

l with expected fuel cycle lengths.

r 6dd%

dn m >9 5 t i- To minimize testing of the DGs, the Note to this SR allows a

{E4 -4., g g r single test (instead of two tests, one for each unit) to satisfy the requirements for both units. This is allowed l

l ej m y 3 since the main purpose of the Surveillance can be met by

.r j f r 9 performing the test on either unit. If the DG fails one of

! k \~' these Surveillances, the DG should be considered inoperable l

on both units, unless the cause of the failure can be i j directly related to only one unit.

l (continued)

PBAPS UNIT 2 t 3 B 3.8-30 Revision No. 1 l

l*

AC Sources-Operating B 3.8.1 BASES SURVEILLANCE SR 3.8.1.17 REQUIREMENTS (continued) #$

The requirement to automatic ly energize the emergency loads with offsite power i essentially identical to that of SR 3.8.1.12.2 The intent the requirements associated with j SR 3.8.1.17.b is to show that the emergency loading is not refvt /

M( f affected by the DG operation in test mode. In lieu of actual demonstration of connection and loading of loads, testing that adequately shows the capability of the emergency loads to perform these functions is acceptable.

This testing may include any series of sequential, overlapping, or total steps so that the entire connection and loading sequence is verified.

The 24 month Frequency takes into consideration plant conditions required to perform the Surveillance and is intended to be consistent with expected fuel cycle length.

To minimize testing of the DGs,3 M Not allows a single test (instead of two tests, one for each unit) to satisfy the requirements for both units. This is allowed since the main purpose of the Surveillance can be met by performing the test on either unit. If the DG fails one of these Surveillances, the DG should be considered inoperable on both units, unless the cause of the failure can be directly related to only one unit.

Y r O SR 3.8.1.18 Under accident and loss of offsite power conditions, loads are sequentially connected to the bus by individual load timers. The sequencing logic controls the permissive and starting signals to motor breakers to prevent overloading of

.the DGs due to high motor starting currents. The 10% load sequence time interval tolerance ensures that sufficient ,

' time exists for the DG to restore frequency and voltage prior to applying the next load and that safety analysis assumptions regarding ESF equipment time delays are not violated. Reference 10 provides a summary of the automatic loading of emergency buses. ,

The Frequency of 24 months takes into consideration plant conditions required to perform the Surveillance, and is intended to be consistent with expected fuel cycle lengths.

(continued) j PBAPS UNIT 2 43 B 3.8-35 Revision No. 0 I

,l, IA$ud t Mik k 8 '3. 9 - 3 s' 9 8

+

f f4 7ll f S W+ dinr G 4 119 R 6cr puy c w, c,o4m' Wfb f?4 .h G t s Mr < /,d inec]e tA, le c nar vc lec/

}c c l-5 b u h . g e., "fho3 C ct3 e, /k4 APG ) ~'

clby nk ys cm

~

bype. sir =c/ by M4. b 6- *" bf " Y bnn H'sv' p)i4ien k 9 i c. . .),

\ 5 w +> f/re JPG 2"'Y' m , shy ap,  %, .,,

, ,< , , .ll1 4c- me.s 1 n L 4 ten .>i cp c, /. fg as,lses y cc,,h,/e % F S< fumf J haf to t ll w Y m y / } je, cy,,,y kuclivay es Ass e b e[L,le

><vece.

l i

Lbbe 1 t.1 h / 4 cb c <c e- Who b $1 A 5 N 13 !!wI~Ifpit*vc'f

+o b. nat

-led usacl'e a8c/

uu less A bc-a944- bus. 9 i, m

i.s cwa,.1 4 c( h ih 5s */h3 ce 4 w a. +ier, pi h d m a c 4 9 e w ~ u le 4.La il 9uincfdo Su ne ]<c,n upn unc<,/ el m sec s t86k sipc, /. -tE n f is t/ri.s ce,(y nficn, A k+ note ses-c4 k l , a i, . + ac L., hl '

l . AC Sources-Operating

~

a* B 3.8.1 i

g .

! 4 BASES (Q t

/ v SURVEILLANCE SR 3.8.1.20 (continued)

I e REQUIREMENTS I A +> The 10 year Frequency is consistent with the recommendations I -of Regulatory Guide 1.108 (Ref. 8). This SR is modified by

\ r

/ 4j f

9 thne M otes. The reason for Note 1 is to minimize wear on the DG during testing. For the purpose of this testing, the DGs

} must be started from standby conditions, that is, with the gQ ,

4 g engine coolant and oil continuously circulated and t S temperature maintained consistent with manufacturer y

fT D l y ]2,3

{ t h

y s

recommendations. To minimize testing of the DGs, Note 2 allows a single test (instead of two tests, one for each y g o- unit) to satisfy the requirements for both units. This is 4 ,L g K L{ allowed since the main purpose of the Surveillance can be met by performing the test on either unit. If a DG fails t 4 kv[ Q(

one of these Surveillances, a DG sh6uld be considered i e inoperable on both units, unless the cause of the failure

( y ~%y

, as can be directly related to only one un t) 7 s

' # V SR 3.8.1.21 d3 u ' \l$ O* With the exception of this Surveillance, all other Z 4Q d

.q I Surveillances of this Specification (SR 3.8.1.1 through SR 3.8.1.20) are applied only to the Unit 2 AC sources.

9 y M. This Surveillance is provided to direct that the appropriate y a p Surveillances for the required Unit 3 AC sources are 2 governed by the applicable Unit 3 Technical Specifications.

4 ** *n *4 h Performance of the applicable Unit 3 Surveillance.s will

( M r satisfy Unit 3 requirements, as well as satisfying this

[4 J) Y ( ,{ " f Unit 2 Surveillance Requirement. Six exceptions are noted to the Unit 3 SRs of LCO 3.8.1. SR 3.8.1.8 is excepted when a c ( only one Unit 3 offsite circuit is required by the Unit 2

) q \p % 1 Specification, since there is not a second circuit to I> transfer to. SR 3.8.1.12, SR 3.8.1.13, SR 3.8.1.17, S I)s  % ~

{ SR 3.8.1.18 (ECCS load block requirements only), and SR 3.8.1.19 are excepted since these SRs test the Unit 3 -

Q4uY q f l ECCS initiation signal, which is not needed for the AC r5 g sources to be OPERABLE on Unit 2.

k' 1 W 4Yg 9 h y The Frequency required by the applicable Unit 3 SR also governs performance of that SR for Unit 2.

N tr Y l As Noted, if Unit 3 is in MODE 4 or 5, or moving irradiated y-4 d M h+ fuel assemblies in the secondary containment, the Note to Unit 3 SR 3.8.2.1 is applicable. This ensures that a Unit 2 s SR will not require a Unit 3 SR to be performed, when the (continued)

PBAPS UNIT 2 4-3 B 3.8-38 Revision No. 0

. _ . _ _ _

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