Text

Proposed Tech Specs Pages,Revising TS 3.7.5 & Bases to Indicate Turbine Driven AFW Pump Is Operable When Running in Manual Mode to Support Plant Startups,Shutdowns & Testing
	ML20198E605
Person / Time
Site:	San Onofre
Issue date:	01/02/1998
From:	; SOUTHERN CALIFORNIA EDISON CO.
To:	;
Shared Package
ML20198E586	List: ML20198E581; ML20198E594; ML20198E605;
References
	NUDOCS 9801090161
	Download: ML20198E605 (20)
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r ATTACHMENT A UNIT 2 .

EXISTING SPECIFICATION AND BASES -

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i AFW Systea !

3.7.5 3.7 PLANT SYSTEMS 3.7.5 Auxiliary feedwater-(AFW) System ~

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'LC0 3.7.5 Three AFW trains shall be'0PERABLE. I f

............................N0TE i Only one AFW train, which includes a motor driven pump,.-is required to be OPERABLE in MODE 4. i i

i APPLICABillTY: MODES 1, 2, and 3, MODE 4-when steam generator is relied upon for heat removal. ;

I ACTIONS -f CONDITION REQUIRED ACTION COMPLETION TIME j!

A. One steam supply to A.1 Restore steam supply 7 days turbine driven AFW to OPERABLE status, pump inoperable. 6NQ j 10 days from ,

discovery of i failure to meet ,

the LCO !

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'B. One AfW train B.1 Restore AFW train to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months inoperable for reasons OPERABLE status. ,

other than Condition A AND ,

in MODE-1, 2, or 3. l 10 days from ;

discovery of

failure to meet i the LCO C.-TwoAFWtrainswith C,1 Restore one AFW train 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months

two motor driven pumps to OPERABLE status, inoperable in MODES l. -

t l2, or.:3.; i (continued)

SAN ON0FRE--UNIT'2-. L3.7-ll Amendment No. 127 i i

y e ,4 -rw,--m.r r-------e-mtn- + - - = - - 'r^m -- w * ~6 ="'m- *w e *r er-'w

Aftl System i 3.7.5 l

ACTION $ (continued)

CONDITION REQUIRED ACTION COMPLETION TIME D. Two AfW trains with D.1 Restore one AFW train 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months one motor driven pump to OPERABLE status. ,

and steam driven pump inoperable in MODES 1, 2 or 3.

E. Required Action and E.1 Be in MODE 3. 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months associated Completion 1 t.se of Conditions A, AND B, C, or 0 not met.

E.2 Be in MODE 4. 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months

f. Three AFW trains f.1 - --- --NOTE---------

inoperable in MODE 1. LCO 3.0.3 and all 2, or 3. other LC0 Required Actions requiring MODE changes are suspended until one AfW train is restored to OPERABLE status.

Initiate action to Immediately restore one AfW train to OPERABLE status.

(continued)

SAN ON0fRE--UNIT 2 3.7-12 Amendment Ho. 127

7-.--..

AFW System B 3.7.5

, a BASES , ,

, APPLICABLE steam turbine driven AFW pump. In such a case, the EFAS SAFE 1Y ANALYSES logic might not detect the affected steam generator if the (continued) backflow check valve to the affected MFW header worked steam generator by the redundant AFW pump.

The AFW System satisfies Criterion 3 of the NRC Policy Statement.

LC0 This LCO requires that three AFW trains be OPERABLE to ensure that the AFW System will perform the design safety fur.ction to mitigate the consequences of accidents that could result in overpressurization of the reactor coolant pressure boundary. Three independent AFW pumps, in two diverse trains, ensure availability of residual heat removal capability for all events accompanied by a loss of offsite power and a single failure. This is accomplished by powering two pumps from independent emergency buses. The third AfW pump is powered by a diverse means, a steam driven turbine supplied with steam from a source not isolated by the closure of the MSIVs.

The AFW System is considered to be OPERABLE when the components and flow paths required to provide AFW flow to the steam generators are OPERABLE. This requires that the two motor driven AFW pumps be OPERABLE in two diverse paths, each supplying AFW to a separate steam-generator. The turbine driven AFW pump shall be OPERABLE with redundant sty supplies from each of the two main steam lines upstt.am of the MSIVs and c pable of supplying AFW flow to either of the two steam generators. The piping, valves, instrumentation, and controls in the required flow paths 4 shall also be OPERABLE.

The LC0 is modified by a Note indicating that only one AFW train, which includes a motor driven pump, is required to be OPERABLE in MODE 4. This is_because of reduced heat removal requirements, the short period of time in MODE 4 during which AFW is required, and the insufficient steam supply available in MODE 4 to power the turbine driven AFW pump.

(continued)

SAN ON0FRE--UNIT 2 8 3.7-26 Amendment No. 127

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ATTACHMENT B UNIT 3 EXISTING SPEClflCATION AND BASES

AFW System I 3.7.5 y 3.7 PLANTShSTEMS .

t 3.7.5 Auxiliaryfeedwater(AfW) System :

i LCO 3.7.5 Three AfW trains shall be OPERABLE.

............................N0TE Only one AfW train, which includes a motor driven pump, is i required to be OPERABLE in MODE 4. (

1

.APPLICABillTY: MODES 1, 2, and 3.

MODE 4 when steam generator is relied upon for heat removal.

ACTIONS CONDITI6N REQUIRED ACTION COMPLETION TIME ' ,

i, Restore steam supply 7 days A. One steam supply to~ A.1 turbine driven AFW to OPERABLE status. !

pump inoperable. AliQ 10 days from discovery of failure to meet l L

the LCO B. ~ One AFP train B.1 Restore AFW train to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months inoperable for reasons OPERABLE status, other than Condition A 6tiQ in MODE 1, 2, or 3.

10 days from (liscovery of '

failure to meet the LCO k

C. Two AFW trains'with. c .1 - Restore one AFW train 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months two motor driven pumps to OPERABLE status, inoperable in MODES 1, 2; or 3.

(continued)

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SAN'ONOFRE l UNIT 3 3.7-11 -' Amendment No.'116 p , n m ,, evr ws ,ae: ---.e g-.a a vn.--e- w- - .

AFW System 3.7.5 ACTIONS (cobtinued)

CONDITION REQUIRED ACTION COMPLETION TIME

0. Two AFW trains with 0.1 Restore one AFW train 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months one motor driven pump to OPERABLE status, and steam driven pump inoperable in MODES 1, 2, or 3.

4 E. Required Action and E.1 Be in MODE 3. 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months associated Completion Time of Conditions A, ah?

B, C, or 0 not met.

E.2 Be in MODE 4. 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months F. Three AFW trains F.1 --------NOTE---------

inoperable in MODE 1, LC0 3.0.3 and all 2, or 3. other LC0 Required Actions requiring MODE changes are suspended unti' one AFW train is restored to OPERABLE status.

Initiate action to Immediately restore one AFW train-to OPERABLE status.

(continued)

SAN ON0FRE--UNIT 3 3.7-12 Amendment No. 116

AFW System B 3.7.5 BASES , ,

APPLICABLE steam turbine driven AFW pump, in such a case, the EFAS SAFETY ANALYSES logic might not detect the affected steam generator if the (continued) backflow check valve to the affected MFW header worked steam generator by the redundant AFW pump.

The AFW System satisfies Criterion 3 of the NRC Policy Statement.

LCO This LC0 requires that three AFW trains be 0%dLE t-'

ensure that the AFW System will perform the design saiety function to mitigate the consequences of accidents that could result in overpressurization of the reactor coolant pressure boundary. Three independent AFW pumps, in two diverse trains, ensure availability u resiaual heat removal capability for all events accompanied by a loss of offsite power and a single failure. This is accomplished by powering two pumps from independent emergency buses. The third AFW pump is powered by a diverse means, a steam driven turbine supplied with steau from a source not isolated by the closure of the MSIVs.

The AFW System is considered to be OPERABLE when the components and flow paths required to provide AFW flow to the steam generators are OPERABLE. This requires that the two motor driven AFW pumps be OPERABLE in two diverse paths, each supplying AFW to a separate steam generator. The turbine driven AFW pump shall be OPERABLE with redundant steam supplies from each of the two main steam lines upstream of the MSIVs aid capable of supplying AFW flow to either of the two steam tenerators. The piping, valves, instrumentation, and controls in tne required flow paths shall also be OPERABLE.

The LCO is modified by a Note indicating that only one AFW train, which includes a motor driven pump, is required to be OPERABLE in MODE 4. This is because of reduced heat removal requirements, the short period of time in MODE 4 during which AFW is required, and the int,ufficient steam supply available in MODE 4 to power the turbine driven AFW pump.

(continued)

SAN ON0FRE--UNIT 3 B 3.7-26 Amendment No. 116

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ATTACHMENT C UNIT 2 PROPOSED SPECIFICATION AND BASES

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'AFW System 3.7.5 ;

3.7 PLANT SYSTEMS 3.7.5 Auxiliary Feedwater (AFW) System LC0 3.7.5 Three AFW trains shall be OPERABLE.

...........................N0TES----- ----------------------

1. Only one AFW train, which includes a motor driven pump, is required to be OPERABLE in MODE 4,

2. "The'steamdriven:AFWpump4isOPERABLE'whenrun'n'ingiand

~ ~

controlled manually.

APPLICABILITY: MODES 1, 2, and 3, MODE 4 when steam generator is relied upon for heat removal.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One steam supply to A.1 Restore steam supply 7 days turbine driven AFW to OPERABLE status, pump inoperable. AN.Q 10 days from discovery of failure to meet the LC0 B. One AFW train B.1 Restore AFW train to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months inoperable for reasons OPERABLE status, other than Condition A AND in MODE 1. 2, or 3.

10 days from discovery of failure to meet the LC0 C. Two AFW trains with C.1 Restore one AFW train 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months two motor driven pumps to OPERABLE status, inoperable in MODES 1, 2, or 3.

(continued)

' SAN ONOFRE--UNIT 2 3.7-11 Amendment No. 127

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-AFW System- !

3.7.5 ACTIONS (continued)-

' CONDITION: REQUIRED ACTION ~ COMPLETION TiliE D. Two AFW trains withi D.1 Restore one AFW train 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months one motor driven pump- to OPERABLE status.

and steam driven pump ,

inoperable in MODES 1, 2, or 3.

E. Required Action and E.1 Be in MODE 3, 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months 4

associated _ Completion Time of Conditions A, AND -

B, C, or D not met.

E.2 Be in MODE 4, 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months F. Three AFW trains F.1 ------- NOTE---------

inoperable in MODE 1, LC0 3.0.3 and all 2, or 3. other LCO Required Actions requiring MODE changes are suspended until one AFW train is restored to OPERABLE status.-

Initiate action to Immediately restore one AFW train to OPERABLE status.

(continued) p l

SAN ONOFRE--UNIT 2 3.7 Amendment No. 127

* ?"" ' * -

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1 AFW System B 3.7.5 BASES , ,

' APPLICABLE . steam turbine driven AFW pump. In such a case,-the EFAS-SAFETY ANALYSES logic might not detect the e.ffected steam generator if the (continued) backflow check valve to the affected MFW header worked steam generator by the redundant-AFW pump.

The AFW System satisfies Criterion 3 of the NRC Policy Statement.

LC0- - This LC0 requires that three AFW trains be OPERABLE to ensure that the AFW System will perform the design safety -

function to mitigate the consequences of accidents that could result in overpressurization of the reactor coolant .

pressure boundary. Three independent AFW pumps, in two diverse trains, ensure availability of residual heat removal capability for all events accompanied by a loss of offsite power and a single failure. This is accomplished by powering two pumps from independent emergency buses. The third AFW pump is powered-by a diverse means, a steam driven turbine supplied with steam from a source not isolated by the clos'ure of the MSIVs.

The AFW System is considared to be OPERABLE when the components and flow patia required to provide AFW flow to the steam generators are OPERABLE. This requires that the two motor driven AFW pumps be OPERABLE in two diverse paths, each supplying AFW to a separate steam generator. The turbine driven AFW pump shall be OPERABLE with redundant steam supplies from each of the two main steam lines upstream of the MSIVs and capable of supplying AFW flow to either of the two steam generators. The piping, valves, instrumentation, and controls in the required flow paths shall also be OPERABLE.

The LC0 is modified by a Note indicating that only one AFW train, which includes a motor driven pump, is required to be OPERABLE in MODE 4. ~This is because of reduced heat removal =

requirements, the short period of time in MODE _4 during which AFW is required, and the insufficient steam supply available in MODE 4 to power the turbine driven AFW pump.

The"LC0 Note'2 indicating 1that'the steam 7 driven AFW'pumpiis OPERABLE when running and. controlled manually; is'necessary because if;theisteam drivcn AFW Pump is.. manually actuated i

(continued)

. SAN ONOFRE--UNIT 2 B 3.7-26 Amendment No. 127-s y , + c- , , - , - , , , - w --

AFW System- ,

B 3,7.5 BASES *

~

LC01 . 7' ' "and-operating 'when a: Main.Steamitine? Break'(MSLB)" occurs; -

j(continued) , l causing-MSIStinitiationifollowed-by ESFAS;initiatione the

~s team driven-AFW-pump turbine con trip on:overspeed. nThe best estimate is that by operating the' steam driveniAFW--Pump- ,

in manual, the cumulative core-. damage frequency decreases- by approximately.2E 10/yr.' The value of 2E-10/yr is based.on' the assumption that the steam driven;AFW pump'_is operated:'in the manual mode'approximately.i.500 minutes' per year.e The steam driven (AFW- Pump.,will. bs available :for alliother --

required,useswhile operating in manual.-

i (continued)

, SAN ONOFRE--UNIT-?2 B 3.7-26a Amendment No. 127 4 - - - .- ,c., ~

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NPF-10/15-482 s 8 ATTACHMENT D UNIT 3 PROPOSED SPECIFICATION AND BASES

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AFW System j 3.7.5

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J3.7 PLANT SYSTEMS:

3.7.5. Auxiliary Feedwater1(AFW) System .

~

LCO 3.7.5- Three _ AFW trains shall ~ be'; OPERABLE.:

...........................N0TES----------------------------

17 Only one _AFW train,~ which includes a motor driven pump, istrequired to be OPERABLE in MODE 4.

2Q IThe5 steam?drivsn"AFWlpumpjis10PERABLE:when3 rip. ningland controlled.: manually.

APPLICABILITY:. MODES 1, c, and 3, MODE 4 when steam generator is relied upon for-heet removal.

-- ACTIONS -

CONDITION- REQUIRED: ACTION COMPLETION TIME

~

-A._ One' steam supply to A.1- Restore steam supply 7-days

turbine driven AFW to OPERABLE status.

pump inoperable. ANR 10 days from discovery of failure to meet the LCO.

B. 'One AFW train B.l' Restore AFW train to 72. hours inoperable for reasons OPERABLE status.

- other than Condition A AND in MODE-1, 2, or 3.

10' days from

' discovery of failure to meet '

the LC0

~C. Two AFW trains'with C.1 -Restore.one AFW train 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months two motor __ driven pumps- to-0PERABLE status.

inoperable in'M00ES 1, 2, or'3.

(continued)

SANON0FREAUNIT'31 3.7-11 Amendment No, 116 uN - -

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AFW System

- 3.7.5.

ACTIONS -(continued) ;

CONDITION . REQVIRED ACT10N1 COMPLETION TIME r

'D. -Two AFW trains with D.1 'Resto- .a AFW train- 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months one motor driven pump- to OPL 'E status, and-steam driven pump inoperable 1in' M0 DES 1, 2, or 3. :

E. Required Action and- E .1 - Be in MODE 3. 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months associated Completion

. Time of Conditions A, ANQ B,.C, or D not met.

E.2 Be in MODE 4. 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months F. Three AFW trains F.1 --------NOTE---------

inoperable in MODE 1, LC0 3.0.3 and all -

-2,-or 3. other 100 Required Actions requiring MODE changes are suspended until one AFW train is restored 4

to OPERABLE status.

Initiate action to immediately restore one AFW train to OPERABLE status.

(continued) e i

('

SAN ONOFRE--UNIT 3 3.7 Amendment No. 116 J

=,--s. . - - - --i,

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

i AFW System B 3.7.5 BASES ,

APPLICABLE- steam turbine driver AFW pump. In such a case, the EFAS SAFE 1Y ANAL',SES -logic might'not detect-the affected steam generator if the (continued)- backflow check valve-to the affected MFW header worked steam

. generator by_-the redundant AFW pump.

The AFW System satisfies Criterion 3 of the NRC Policy _--

Statement.

This LCO requires that three AFW trains be OPERABLE to i LC0 ensure that the AFW System will perform the design safety function to mitigato the consequences of accidents that could result in overpressurization of the reactor coolant pressure boundary. Three independent AFW pumps, in two-diverse trains, ensure availability of residual heat removal capability for all events accompanied by a loss of offsite power and a single failure. This is accomplished by powering two pumps from' independent emergency buses. The third AFW pump is powered by a diverse means, a steam driven turbine supplied with steam from a source not isolated by the closure of the MSIVs.

The AFW. System is considered to be OPERABLE when the components and flow paths required to provide AFW flow to the steam generators are OPERABLE. -This requires that the two motor driven AFW pumps be OPERABLE in two diverse paths, each suppiying AFW to a separate steam generator. The turbine driven AFW pump shall be OPERABLE with red mdant steam supplies from each of the two main steam lines upstream of the MSIVs and capable of supplying AFW flow to either of the two steam generators. The piping, valves, instrumentation, and controls in the required flow paths shall also be OPERABLE.

The LC0 is modified by a Note indicating . hat only one AFW train, which includes a motor driven ~ pump, is required.to be OPERABLE in MODE 4. This is because of reduced heat removal ,

requirements, the short period of time in MODE 4 during which AFW is required, and the insufficient-steam supply

available'in MODE- 4 to power the turbine driven AFW pump.

The"LCONote).2?indicatihh-that:thesteamdrive_niAFWpumpEis OPERABLE 'when running"and controlled manually < is n'ecessary

'because31f(theLsteam_ driven!AFWPump'is'manuallygactuated _

(continued)

SAN ON0FRE--UNIT 3 B 3.7-26 Amendment No. 116

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

AFW System B 3.7.5 BASES '

LCO . . .' -- and' operating when a' MainfSteam Line Break (MSLB) occurs,

'f(continued) icausing MSIS1 initiation _followed by ESFAS-initiation,' the

~

steam driven ~AFW pump turbinefcanitrip'on overspeed. The best estimatetis--that by operating the steam driven AFW Pump in~ manual,,the cumulative core damage: frequency decreases by approximately' 2E-10/yr. The Lyalue of 2E-10/yrnis=-based on 2

the assumption!that the steam >driveniAFW, pump 1s operated in the manuaitmode approximately.500 minutes ner year.' The~

steam' driven l AFW Pump will be:available-for all other required uses 'while- operating;in manual .- .

(continued)

SAN ON0FRE--UNIT 3- B 3.7-26a Amendment No. 116 >

NPF-10/15482 4

ATTACHMENT E Auxiliary Feedwater System Flow Diagram

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ML20198E605

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