ML20141D282

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Rev 2 to PRA96NQA-01093-S3, MP3 Maint Performance Criteria
ML20141D282
Person / Time
Site: Millstone Dominion icon.png
Issue date: 10/30/1996
From:
SARGENT & LUNDY, INC.
To:
Shared Package
ML20141D279 List:
References
PRA96NQA-01093, PRA96NQA-01093-S3-R2, PRA96NQA-1093, PRA96NQA-1093-S3-R2, NUDOCS 9706270113
Download: ML20141D282 (24)
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Text

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Total number of pages
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) MP3 Maintenance Performance Criteria TITLE 4

PRA96NOA 01093 S3 2

CALCULATION # REV # Vendor Calc #

l System MSC Structure N/A Component N/A

' Executive Summary l

]

l 1

l b l

! Does tnis calculation: l l 1. Support a DCR, MMOD, an independent review method for a DCR, or Yes ONo @

i confirm test results for an installed DCR? If yes, indicate the DCR, MMOD j number and or Test Procedure number.

' 2. Support independent analysis? If yes, indicate the procedure or work Yes ONo O control reference it succorts.

3. Revise, supersede, or void existing calculations? If yes, indicate the Yes @No O l
calculation number and revisions. PRA96NOA 01093 S3 Rev.1, Rev. 0

[ 4. Involve OA or OA related systems, components or structures? Yes ENo O l 5. Impact the Unit licensing basis, including technical specifications, FSAR, Yes ONo E procedures or licensing commitments? If yes, identify appropriate change documents.

Approvals (Print' Signature) -

l

Preparer
A / e. L--.e Date: ic - 3 c - %

Independent Reviewer: Ett O.s 2) Date: O-t A /

Supervisor: /r- / .1 Date: /c- ? e 44 9706270113 970625 NUC DCM FORM 51 A PDR ADOCK 05000423 Rev. 03
- P PDR 4

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3' i CTP DATA BASE INPUTS [CT Unit only) - -

i 1 NUSCO Calculation Number: PRA96NOA 01093

{ S3 Revision 2

!- (prefix) (sequence (suffix) 1- number) Date 10/30/96

> Vendor Calculation Number /Other:

Title:

l 1

_ MP3 Maintenance Performance Criteria l CCN# Superseded By:

OA(y/n) N

Superceces Calculation: PRA96NOA 01093 S3 Rev.1 Rev. 0 i

i Unit i EWR Number l Comoonent Id I Comouter Code f MP3 l l

Rev. #/ Level i

! CAFTA 3.1 a i i

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PMMS CODES I Stru
ture System Component I Reference Reference , Sheet Calculation Drawines NA IMSC i N'A Rev.1. Rev. O I l l l

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1 i Comments: }

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NUC DCM FORM 51B Rev. 03 i

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

4

.,s EDassts.40 NORTHEAST UTILITIES SERVICE COMPANY StfBJEM WP3 Maimen-a en perf eminea critaria 3y 3, t. caivame DATE 10/29/96 J

cxxc. sy 5A^

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DAT 18Q 9 / 0 &

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_ 0F 1 TABLE OF CONTENTS i

1. 0 P urpo s e : . . . . .. . .. .... .. .. . . . . . . . . . . .. . . . . .. ... . . . .. ........... l 2.0 Scope:........................................................................................................................................4 l
  1. 3.0 S u m m a ry o f R e s u11s : . . . . .. ... ... .... . .. . ... . . . .. . . . .. ..... . ... . .. . ...... .. .. ... ... . . . .. ... . .... . . .. .. . .

4 .0 R e f e re n ce s 'D e sig n i nput s : . . . . . . . . . . . . . . . . . . . . . .. . . . . . ... .. .. . . . ... . ..... .. .. . . .. .. . . ,

5.0 As s u m pt i o ns : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. . .. .... .. ... ... .. ...1.9 . . . . . . . . . .

6.0 R eviewer's Comments and Resolution: ............................................................. I

7. 0 Att a c h m e n t s : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......................22 ...................

Attachment A Attachment B

Attachment C
Attachment D 4

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EDass? Ho NORTHEAST UTILTilES SERVICE COMPANY n

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Purpose:

The purpose of this calc. file is to document the procedure in generating the Millstone Unit 3's maintenance performance criteria for PRA modeled systems from version SA of the MP3 mode This PRA input would be only one factor used in determining the final MP3 system performance criteria. Perfcrmance c;iteria refers to the recommended amount of time a MP3 system ma for maintenance in order to minimize plant risk. Revision 1 incorporated performance criteria for!

quench spray and RPCCW systems. Revision 2 was performed based on the final signoff of PRA i model M3PRASA. This resulted in updated importance measures and consequently new '

systenytrain performance criteria. The risk significance of all systems modeled in the PRA was determined based on three criteria: (1) cutsets within the top 90% of the ceremelt sequence j

cutsets, (2) system train RRW of 1.005 or higher, and'or (3) system train RAW of 2.0 or more.

4

2.0 Scope

The scope of this calculation includes only PRA modeled systems for which FV (Fussell Vess imponance measures could be determined.

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

EDetWG ,

HORTHEAST UTIUTIES SERVICE COMPANY .

sus scT w>s w iet.-.-e. sa m -= ~ erst. 1. sy e. m. caivane mra meg CIID. 3Y h MTE h/I[I I e u . no. m. nm . m. , . n

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SEIIT NQ. E

. uf 4 3.0 Summary of Results: i

., First of all, the Risk Reduction Worth (RRW) and the Risk Achievement Worth (RA!

system 1 rain were determined. From the RRW the Fussell Vessly (FV) was readily calculal i FV = 1 - 1/RRW l

The RRW came about by setting basic events pertaining to the systerrvtrain along with th

common cause counterparts in the coremelt sequence cutset file to falta and dividing the re i trequency into the base case frequency. On the other hand, the RAW was dete!

basic events pertaining to the system / train to trug and dividing the resultant freque case freauency. Common cause related basic events were set equal to their correspon!

(S) factor instead of being set equal to itut. Human error probabilities (HEPs) we both RRW and RAW determinations.

in the past, several alternative methods have been devised and used by PRA in genera
inputs to the system performance criteria. These are documented in References 1 thru 4. Th 1 inputs to the MP3 performance criteria were generated based on a slightly modified version approach discussed in Reference 1. Even though different methods were used in References 1 t, consistency has been maintained by

1 a) Assuring that the increase in the core damage frequency (CDF) due to all bi*

maintenance unavailability is limited to 2%, and U**8'*

I b) 1.imiting parameter. the factor multiplier on 0, to 10 regardless of the Fussell Vessely (FV) importa We emphasize the fo!!owing:

1) The numbers provided are nal final performance criteria. They represent PRA input to sh the impact of 0.'s on CDF, and thereby demonstrate the flexibility available in selecting th Final Performance Criteria.
2) The System Engineers and the Expert Panel may choose Final Performance Criteria that exceed PRA input. In some cases, depending on the scatter of the O.,'s by year or the nature of the root causes of the system failures, selecting performance criteria that exceed PRA input are strongly recommended.

In order to accomplish conformance to the above two criteria [aCDF < 2% and FV(0.)

of the inputs in Table 2 had te be re calculated using the equation:

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

4 ED4:s? 6 so NoMTHEAST UTluTIES SERVICE COMPANY sus 3:07 vn wifeta -e. ma rrerme. erie.ria ny 3. v. esivano mT 3 e n , f,,

CIED. 3Y MTE ___ klf em:. no, m ., m .ese.s.., a,v, SIIIT NO. 8 Of A Performance Criteria = 8760FV * {0.02 *(b)) '

I where, O,is the total unavailability of the system train, e.nd FV = 1 1/RRW where RRW came about by setting basic events pertaining to the system / tra along with their common cause counterparts in the coremelt sequence cutset file to lAlli and dividing the resultant core damage frequencyinto the base case core damage frequency. l The bases for utilizing the factor of 4 (when FV > 0.01) and the factor of 10 (when FV < 0.01)in Reference 1 goes as follows. Our objective was to devise an extremely simple approach to accomplish the overall objectives of the maintenance rule. Using the definition of FVimportance for )

train 'i':

1 FV, = * ~ =1-(b/a) a or b

- = 1 - FY, a (1) where, -

a = CDF,,, b = CDFo ,,

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fd

r 2isV' C*

,,$,f.m.-s*"'r;2i;D-

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!! Q,,is increased by a factor of x (x>1), then e the summation of the probabilities of the subset of cutsets that contain train 'i' will increasp by at least a factor of x. Notice it

. a doesn't increase by exactly a factor of x due to truncation effects.

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,s ED4207 M0 NORTHEAST UTILITIES SERVICE COMPANY 3U330T wts F.nitta acen perfe w.anen eritaria 3Y 3. D. Calvane MM 10/29/96 can. sr fto M u - ISIP /06 en e. yo. ,uis m .eiens.ns arv. A

-. SEE27 N0. i Oy 4 That is, J

d 2 ex with e=O_ gives:

J e-b 2 x(a - b) or e-b

a-b ea-ba xs (2) 1-ba If the CDF increase from O, to 0,,,, is "y%" then:

v = 100 * ' ' '

a

ela = 1 -)/100 (3)

Substituting for "b'a' and 'e'a* in equation (2) from equations (1) and (3) respectively yields:

x s {l + y 100)-[1 - FY,]

1-(1-FY,)

FY, + y/100 xn FY, x

O'" g3 Y .

Q s,,, 100

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, .,a sD W 640 NORTHEAST UTILITIES SERVICE COMPANY-s ass:t m v. a e .- - 9.rr m-e. cr u.n. n 3 . t, . e c s,m ar 3ef3,,,,

I cxxo. sy hla ura Idl%/91 cru:. no. mmm eim n

v. A sazar me. a er A Hence, the allowable increase to 0,is given by:

Y 4

, g ""

100

  • FV, and considering 0, . = 1/4 0, the equation above reveals the allowable increase to O. to be:

4*v 100

  • FV, With a 2% change in CDF aM a FV,of 0.01 this amounts to:

43

] 100*(0 01) 4 an eight (8) fold increase in the unavailability of the system train. Therefore in general the factor of ten (10) is justified when the FV.is approximately 0.01 or lower.

in light of the fact that:

~

(a) A simple acjustment factor is desired for this interim value with PRA input to performance

', enteria and (b) O. = 1/4 0 is not a strict rule, factors 4 and 10 anchored around a FV of 0.01 was deemed to be applicable. Other additional J qualitative justifications may be found in Reference 1.

The fo!!owing two tables detail which basic events were used in the determination of the FV and the performance enteria for each ystenytrain considered in the M3PRA5A model. The pump train lead flags were renamed but this late tum o'f. not to be necessary; hence, the reason for the CAFTA

database M3PERFCR.BE. Neeciess to say the calculations were unaffected.

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Table 1:

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MP3 Basic Cutset Events Used In FV Determinations System / Train D&scription Accumulator Train A Prefix '

Accumulator Train D ACCD remoclaf ACCD

_ Basic Events Chard Accumulator Train C remoda1 Accumulalor Train D ACCC rcmodhI ACCD remodb2 Auxiliary Feedwater MD Pump Train A AFWA ,

Auxiliary Feedwater MD Punt Train B AFWB twcpofwap f fn,fwcpofwapinn.fwmoda . ttwapofwp ecvdisc3nn, Auxiliary Feedwater TD Punv#:ain AFWX twcpofwap1fn,fwcpofwapinn,fwmott)1twbp0fwp1 .

cvdisc3nn, AFW and Mech Room HVAC Train A tweev3013dnn,fwecv3of4cnn.fwcev3v88xnn , x fwcevdis t HVAA hvmodci AFW and Mech Room HVAC Traia B HVAB hvmodet Charging Traire A Charging Train B CilA Charging tube OilCooling Train A CHB Charging Lube OilCooling Train B CHLA CHLA chbcpB511btf.chbcp8512bff chmod (basic events below trocation)

Charging and CCW Area HVAC Train A Charging and CCW Area HVAC Train O CHCA (basic events below trocation) '

CHCA (basic events below frucation) '

Control Building Chilled Water Train A (basic events below trocation) '

CWA Control Building Chilled Water Train B CWB hvmodc4.swa2pswp2paqhva8phvkptnq.hva8phvk ,

, vmodc3, hvmodc4.swb2pswip2bghvb8ptrAping.hvb8phvkp3 ,

, w odc3, DC Power Train A ,

DC Power Train B DCA

! %dcbsi301afn DCB %dcbsi30lbin g . .-ausium. . ,

g

. -_ ~ - . - ~ .

rDent sas NORTHEAST UTMP SERVEE COGSPANY d

, i sonJsicT__71r3 J elatenance.Ferforsonce. criteria .M J. D. cal _ver,o DATR 10/29/95

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_ . . _ . . . . _ _ _ _ _ cAtt, MO. Pita 36MtJL.919th33 minr. 2

. _ . . _ . _ _ siim o. in or _22_ -

Table 1: MP3 Basic Events Used in FV Determinations Cutset System / Train Descrieflon Prefix Basic Events Chanagt Diesel Generator Train A - DGA acadg3egsaag.acmoda3,acmoda4.acmodc t Diesel Generator Train B DGB acbdg3egshtxt acirivdb33,acinudb4,aciraxici S00 Diesel Generator Train SBO acxdgsbodgnn acxdgsbodgxq.oasbow Diesel Generator Enclostwe IIVAC Train A DGIIA acmrxlai5 Diesel Generator Enclosure iIVAC Train B DGIfB acmodbI5 'i DWST DWST Iwxtktdwstin >

ESFAS Train A

'ESFA esaesesfiaaq ESFAS Train B ESFB esbesesfibby i i

High Pressine Safely friection Train A IIPSA sinxxict High Presstne Safety lolection Train B HPSB simodel St Pump Lube Oil Cooling Train A - SILA simoda2,simodel St Pump Lube Oil Coolirs1 Trein B SILB simodb2 simodel intake Structure (SW) HVAU Train A ISilA hvainein2aln.hvaswmod t .hvcswmod 1,hvcinin2abin -

t Intake Structure (SW) HVAC Trair B ISitB hvbtnein2bfn,hvbswmodt,hvcswmodt hvcinin2abfn Main Feedwater Train A/B MFW %Imfw.mfwt Main Steam System Train A MSSA i

msemic20f4ff,msxavpv20aff msxrvrv22aff msxrvrv23aff Main Steam' System Train B MSSB msweic20f4ff.msxavpv20bff,mswrvrv22bif,msxrvrv23 bit Main Steam System Train C MSSC  ;

irsurk.20f4ff,msxavpv20cff msxrvrv22cff.msxrvrv23cff Main Steam System Train D MSSD msemec2014ff msxavpv20dff msxrvrv22dif.msxrvrv23dif '

Main Sicam Sysicm - Steam Dump to Condenser DUMP msxavpv47aff.msxavpv47bff,msxavpv47cif,msravpv48aff,msravpv48bff,  ;

msxavpv48cff, msxavpv49aff,msxavpv49bff.msxavpv49cff ,

i e

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_ _ _ _ _ . _ . _ ._m_.__ _ _ _ . - _ _ _ _ . _ _ _ _ _ - _ - _ _ _ _ _ _ _ . . _ _ _____m_.-___ _ _ _ - _ _ _ _ - - _ _

Enez,r Sao NOnTHEAST UTM.I' "'a SERVICE COMPANY ,

sunJPcT_ Nr3_pleintenance_Performence criterie _.. av .3 . p. calvano pare se/29/9s ,

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Table 1: MP3 Basic Events Used in FV Determinations l Cursef System / Train Description Prefix Basic Events Chanoed MCC/RCA Room HVAC Train A HCAA i MCC/RCA Room HVAC Train B RCAB hvcacac t abfn.hvmccmodx2.fivxaca m t anxi l hvcacac t abin hvirwiiudx1,hvxacacu tbnq  !

PORV Train A PORA PORV Train B esabip455enf,esarcrk711ff,rcapvv455 ann.rcapvv455ang rcmoda11,rcmoda2 PORB estxhp456ent.esbrcrk711ff rchpvpv456tm rebpvpv456ng,remodbf f,rcmo@f 2 o o Quench Spray Train A OSSA Ouench Spray Train B (basic events below trucation)

OSSA (basic events below trucation)

RCS Safety Relief Valves (SV80 f 0A, B, C) HCSV remodx1,rcmodx2,rcmodx3 RPCCW Train A RPCA RPCCW Train B (basic events belowinmation)

RPCA (basic events below trucation) '

Reactor Protection System RPS rielec,rtmech Residual Heat RemovalTrain A RHRA  ;

Residual Heat Removal Train B (basic events below trucation) -

RHRA (basic events belowinmation)  !

RHR, OSS and St Area HVAC (ACUS 1 A) Train A OSilA hvmodaf RHR, OSS and St Area HVAC (ACUS 1B) Train B OSHB hvmodbf

~

Recirculation Spray Train A RSSA 3 rhacv8969 ann rhemv8 f 2abff,rsccvv3536nn, rscp 6tp f abnn,rsmoda11, i rsmoda 16,rsmoda2,rsmoda3,rsmoda4,i s..uda5,rsmoda6,rsmoda7,rsmoda8, Recirculation Spray Train B rsnxxia9,rsmoda12,rsmodc2,es...v4.4,rsmodc5,rsmotic6 sacmvv54abers RSSB rhbeve%9bnn rhemv812abit.rsecvv3536nn. rscp 6tplabnn rsmodb10 tsmodb11,rsmodb12,rsmodb 13,rsmodb t 6,rsmodb2,rsmodb3,rsmo@4,rsnxW

. . _ _ _ _ . . . . _ _ . _ . _ . _ _ _ . ~ . _ . _ . . _ _ . . _ _ . _ _ _ . _ .. . ..

rtmersie NOnTHEOST tHILITIE! RVICE COMPANY S N _Pir3_fteintenance rerrorenace. criteria _ _ _ _ BY J. D. ceivano DATs 10/29/96

_ _ _ . _ CNKD. 97 DATE

_.__ . _ _ _ . . . . _ _ _ cair. No. FRAMNQiL910thS3 REY. _._2_ _

_ . . ___ .:verrT so. 12 or __.2 2_.,

Table 1: MP3 Basic Events Used in FV Determinations Cutset System / Train Description Prefix Basic Events Chanced rsmodb7,rsmodb8,rsmodc2,rsmodc4,rsmodc5,rsmodc6.swcmvv54abnn j

HSS IIVAC Train A RSHA hvachacs2ang.rsmoda4,rsmodc7 HSS HVAC Train B RSHB hvbchacs2bng.rsmodb6 isivudc7 '

RWST RWST qsxikgrwstin,sixvmsilvinx Service Water Pump Train A SWA %swmoda23,%swp3i34abfn,%swp3i34adin,%swp3idof4fn,%swp3spmacin,  !

swacp63 x 12ff. swap 3swplasq, swap 3swpiafn.swmoda8.swmodel ,

Service Water Pump Train B SWB %swmodb23,%swp3i34abin,%swp3i34cbfn,%swp3i4of4fn,%swp3ipmbdin,  !

swbcp63x12ff,swbp3swp1bbq,swbp3swp1 bin.swmodb8 s- ..udi2 -

Service Water Pump Train C SWC %swmoda24%swp3i34cbin,%swp3i34cdtn,%swp3i40f4fn,%swp3ipmacin,  ;

swcp3pmpacfn.swmodct  !

Service Water Pump Train D SWD %swmodb24,%swp3i34adfn,%swp3i34cdin,%swp3i4of4fn,%swp3ipmbdin t I'

SWGR HVAC Train A SWGA hvcaca3a3bnn,hvmodaca2 SWGR HVAC Train B SWGB hvcaca3a3bnn,hv...udecb2 120v Vital AC Power Train A (VIAC-1) VITA (basic events below trucation) 120v Vitai AC Power Train A (VIAC.2) VITA (basic events below trucation) 120v Vital AC Power Train A (VIAC-3) VITA (basic events below trucation) i 120v Vital AC Power Train A (VIAC-4) VITA (basic events below trucation) l i

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

roer,r see NORTHEAST UTit. TTY 'ERVICE COGAPANY susJrct ItrJ_Penintenance.rerformance criteria ,__ _ BY J. D. Ceivono DATE 10/29/96

_ _ _ . . _ . _ _ _ . . .._ CMD. RY hn DATR hMb

. _ _ _ . . . . .__ _ _ _ _ _ CAIC. #3 _ lRAf6 E 91993-23 RRY. 2

__ . _ _ _ _ _ _ . . m ut No. 13 or , 22_,,,

l Table 2: MP3 Maintenance Rule importance by System / Train l '

Top 90% Afaint. Sys] Train Criteria System! Train Descrktion CMF7 _FV RRW RAW Unavail. Unavail. (hrsNr)

Accumulator Train A(2,10) Y 0.014 1.014 12.56 3.00E-04 1.20E-03 13 l Accumulator Train B(2,10) Y 0.014 1.014 12.56 3.00E-04 1.20E-03 13 Accumulator Train C(2,10) Y 0.014 1.014 12.56 3.00E-04 1.20E-03 13 i

Accumulator Train D(2,10) Y 0.014 1.0 f 4 12.56 3.00E-04 1.20E-03 13 l

, Auxiliary Feedwater MD Pump Train A Y 0.026 1.026 11.73 1.50E-03 9.30E-03 53 l Auxiliary Feedwater MD Pump Train B Y . 0.026 1.026 11.73 1.90E-03 9.70E-03 50 Auxiliary Feedwater TD Pump Train Y 0.052 1.055 7.80 3.90E-04 2.30E-02 34 l

AFW and Mech Room HVAC Train A(3) Y 0.003 1.003 11.62 1.13E-03 3.55E-03 99 AFW and Mech Room HVAC Train D(3) Y 0.003 1.003 11.62 1.13E-03 3.55E-03 99 Charging Train A Y 0.030 1.031 2.00 2.60E-03 5.40E-03 23 l

! Charging Train B Y 0.030 1.031 1.99 2.50E-03 5.30E-03 22  ;

' Charging Lube Oil Cooling Train A(1) N 0.000 1.000- 2.51 7.50E-04 3.90E-03 66 ,

Charging Lube Oil Cooling Train B(1) N 0.000 1.000 2.51 5.10E-04 3.60E-03 45

. Charging and CCW Area HVAC Train A(1,3) N 0.000 1.000 9.02 1.13E-03 1.60E-03 99 Charging and CCW Area HVAC Train B(1,3) N 0.000 1.000 9.02 1.13E-03 1.60E-03 99 Control Building Chilled Water Train A(3) Y 0.062 1.066 32.50 8.78E-03 4.61 E-02 77 -

Control Building Chilled Water Train D(3) Y 0.061 1.065 32.59 8.78E-03 4.61E-02 77  !

DC Power Train A Y 0.010 1.010 6.50 NA NA NA DC Power Train B Y 0.010 1.010 6.50 NA NA NA i

t-

_ _ _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . . _ . . - _ _ . _ _ ___.______________.____-__________________.__m.__ _ - - _ _ _ - ___.m__- _ . _ _ _ . _ _ _ _ _ - _ _ _ _ _ _ _ . _ _ . _ - _ _ ____ 'w..___ -_______ _ _ . _ _ _ _ _ _ _ _ _ _

toovt s.es NORTHEOST UTILIP' SERVICE COMPANY .

SUsJnCT _NP3._pointenance_rerrornence.criterte. nY J. D. Calvmeo DATE 19/29/94

. , _ _ , _ CffRD. RY ID DATR QMOL

_ _ _ _ Calf. NO. PRA96potg1993-M1 RRV. 2 sitRrr no. 14 or JL Table 2: MP3 Maintenance Rule importance by System / Train  !

Top 90% Maint. Sys] Train Criteris Systern/TrnIn Description CMF7 FV RRW RAW Unavail. Unavail. (tursNr) ,

Diesel Generator Train A(4) Y 0.028 1.028 4.49 1.10E-02 3.80E-02 193 Diesel Generator Train B(4) Y 0.026 1.026 '3.96 9.10E-03 3.60E-02 239 S00 Diesel Generator Train {4) Y 0.008 1.008 1.44 2.10E-03 1.90E-02 184 Diesel Generator Enclosure HVAC Train A Y 0.007 1.007 1.4 ;

Diesel Generator Enclosure llVAC Train B 1.13E-03 2.10E-02 99 Y 0.007 1.007 1.41 1.13E-03 2.10E-02 99 DWST Y 0.002 1.002 799.32 NA NA NA ESFAS Train A Y 0.004 1.004 2.27 NA NA NA ESFAS Train B Y 0.004 1.004 2.27 NA NA NA High Pressure Sately injection Train A(5,11) N 0.000 1.000 1.25 1.50E-03 4.30E-03 131 High Pressure Safety injection Train B(5,11) N 0.000 1.000 1.25 9.00E-04 3.70E-03 79 St Pump Lube Oil Cooling Train A Y 0.006 1.006 1.45 5.10E-04 2.10E-02 45 SI Pump Lube Oil Cooling Train B Y 0.006 1.006 1.45 3.10E-04 2.10E-02 27 .

a.

Intake Structure (SW) HVAC Train A(3,10)

Y 0.040 1.041 34.13 4.73E-05 1.89E-04 1 intake Structure (SW) HVAC Train B(3,10) Y ,

0.040 1.042 34.23 4.73E-05 1.89E-04 1 Main FeedwaterTrain A/B(6) Y 0.013 1.014 1.31 NA NA NA Main Steam System Train A(9) Y 0.010 1.010  !

2.79 NA NA NA Main Steam System Train B(9) Y 0.010 1.010 2.79 NA NA NA Main Steam System Trbin C(9) Y 0.010 1.010 2.79 NA NA NA i

I

toem see NORTHEAST UTM.ITF' SERVICE COMPANY SUBJECT _ MP3_ Maintenance _ Performance Criteria BY J. D. Calvono DATE . _ . 10/29/96 I

c-o. n .... % Dm 10/aq/ql, i carr. No. enA961m LO1923-53 Rev. 2 snm no, n or JL Table 2: MP3 Maintenance Rule Importance by System / Train  :

Top 90*; r System / Train Description nialnt. Sys1 Train Criteria CMF7 FV RRW RAW Main Steam System Tmin D(9) Unavail. Unsvalf. thrs&r)

Y 0.010 1.010 2.79 NA NA NA Main Sham System - Steam Dump to Condenser (7) Y 0.025 1.026 2.30 NA NA NA i i

MCC/RCA Room HVAC Train A Y 0.004 1.004 7.29 3.09E-03 G.90E-03 MCC/RCA Room HVAC Train D Y 271 0.004 1.004 7.29 3.09E-03 6.90E-03 271 PORVTrain A(10) Y 0.040 1.042 2.23 6.50E-03 2.60E-02 114 PORV Train B(10) Y 0.040 1.042 2.23 6.50E-03 2.60E-02 114 i Quench Spray Train A(1,11) N 0.000 1.000 1.65 2.00E-03 1.32E-02 Ouench Spray Train B(1,11) N 175 0.000 1.000 1.65 1.70E-03 1.32E-02 149 '

RCS Safety Relief Valves (SV8010A,8, C)(8) Y 0.032 1.033 1.13 NA NA '

NA RPCCW Train A(1,11)

N 0.000 1.000 1.11 RPCCW Train B(1,11) 2.40E-03 3.14E-03 210 N 0.000 1.000 1.11 ,.

4.70E-03 3.14E-03 412 Reaclor Protection System f.[- ,

Y 0.118 1.134 6606.98 NA NA NA Residual Heal Removal Train A(1,11) N 0.000 1.000 1.00 2.20E-03 5.50E-03 i

Residual Heat Removal Train B(1,11) 193  !

N 0.000 1.000 1.00 1.30E-03 4.60E-03 114 RHR, OSS and SI Area HVAC (ACUS 1 A) Train A(11) N 0.000 1.000 1.02 5.59E-03 2.55E-02 489 RHR, OSS and St Arda HVAC (ACUS 18) Train B(11) N 0.000 1.000 1.02- 5.58E-03 2.55E-02 489 i

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. . - . _ _ . . . _ _ _ . . - . . . . _ . . . ._m.. . _ _

- i rocersee NOHYHEAST UTILr SERVICE COMPANY '-

SUBJFCT _ffP3 ftstatenance. Performance Criterts n J. D. calv_ano DAT. 19/29/94 ,

___ coo. n Ro ,. 10/f/'lf._ I caic. no. m munna .. 2 -

sn.rr no. u- or 22 j Table 2: MP3 Maintenance Rule importance by System / Train Top 90% ntaint. Sys] Train Criteria System!Trhin Description CnfF7 _FV RRW RAW Unsvall. .Unsvall. (hrsNr)

Recirculation Spray Train A Y  :

Recirculation Spray Train B 0.189 1.232 42.60 1.20E-03 3.60E-02 32 Y 0.t88 1.231 42.11 1.00E-03 3.60E-02 26  :

RSS HVAC Train A(3) Y 0.006 1.006 1.35 5.58E-03 1.59E-02 489 RSS HVAC Train B(3) Y 0.006 1.006 1.35 5.58E-03 1.59E-02 489  !

RWST Y 0.0f 0 1.010 790.38 NA NA NA Service Water Pump Train A Y 0.148 1.174 2.48 1.10E-02 1.90E-02 96 Service Water Pump Train B Y I' 0.149 1.175 2.47 9.40E-03 1.80E-02 82 Service Water Pump Train C Y 0.146 1.171 2.13 9.00E-04 9.20E-03 8 Service Water Pump Train D Y 0.145 1.169 1.37 3.30E-03 1.20E-02 29 SWGR HVAC Train A(3,10) Y t

0.001 1.001 1.43 6.60E-06 2.64E-05 1 SWGR HVAC Train B(3,10) Y 0.001 1.001 1.43 6.60E-06 2.64E-05 1 '

120v Vital AC Power Train A (VIAC-1)(1,11) N 0.000 1.000 ' '

15.29 NA NA NA 120v Vital AC Power Train A (VIAC-2)(1,11) N 0.000 1.000 15.29 NA NA NA 120v Vital AC Power Train A (VIAC-3)(1,11) N 0.000 1.000 15.29 NA NA NA 120v Vital AC Power Train A (VIAC-4)(f,1 f) N 0.000 1.000 15.29 NA NA NA ,

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,. s ED4297 H o NORTHEAST UTILITIES SERVICE COMPANY 878330T ws3 wafetesanea perfe m.anea erfteria 3Y 3. C. Calvamo DATE 10/29/96 CIKD. 3Y DATE \b (

cau:. No. ,u. <wn . ei e s . ,

may. A SEI27 No. 1a OF &

4,0 References / Design inputs:

1) NE 94 SAB 386, Memo. from James M. Powers to K. B. Hastings, Nov.1,1994.
2) NE 95 SAB 054, Memo. from Jack R. Barnett to K. B. Hastings, Feb.1,1995.
3) NE 94 SAB 448, Memo. from Fred O. Cietek to K. B. Hastings, Nov. 29,1994.
4) NE 95 SAB 137, Memo. from James M. Powers to Gene McNatt, Mar. 30,1995.

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NORTHEAST UTILmES SERVICE COMPANY gUS. TEM WM Wa f e t a* **ee perfe m -en evitaria 3Y 3 . 1) . Calva.no Mr2 __ 10/29/96 can,sr b urE bb9/M _

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SEEIT NO. H i

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5.0 Assumptions

1. In cases where there was no plant specific maintenance historical dat maintenance unavailabilities in Table 1 were based on generic main if known or taken at 25% of the total train / system unavailability if unknown.
2. Charging check valves CVs (CHMODXO2) were not included in the boundaries since they cannot be divided up into a specfic train (comm .
3. HPSI check valves CVs (SIMODX1) were not included in the HPSl p since they cannot be divided up into a specfic train (common to both).

4.

train boundaries since they are not train specific (co ,

1

5. AFW check valves CVs (FWCCV3V8BXNN, FWCCV3OF4CNN) were n! '

AFW pump boundaries since they are not train specific.

i

6. Service water MOVs (50,54,71), RHR MOVs (8812,8801), RHR CV 896 (8920, B314,8813 ) are considered part of the RSS train boundaries.
7. ESFAS bistable and relay coi!(K711) specfic to the operation of the PORVs we considered to be part of the PORV boundary.

S. incluceo Checkinvalves 8815 and 8546 which result in a failure of the total charging tne specific train calculations.

9.considered Cutset  % LOOP ACAININV1 AFN CHALEAD RSM in the top 90% of the cutsets.

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_ CF 4 6.0 Reviewer's Comments and Resolution:

1) Comment:

On page 6, O, is the unavailability of a system train due to maintenance an Resolution: Agree, changed in calc. file.

2) Comment: What version of MP3 PRA modelwas used?

Resolution: Answered in Objective section as version M3PRA5A.

3) Comment:

StillSW otner dotrains.

not understand how SW train 'C' has a much lower crite Resolution:

Historical data indicates that SW train 'C' has a lower probability of being out of service for test or maintenance.

4) Comment

The charging and SI pumps coeling trains have a much lower criteria (# of hrs.)

than the aMual charging and Si pumps. Why is this?

Resolution:

Histoncal daic indicates that charging and SI pumps cooiing trains have a lower probability of being out of service for test or maintenance.
5) Comment:

Discussion should be added to text regarding risk significance determination as well e as performance criteria. Restate Rev. 2 sentence in Section 1.0 to include the full scope of this revision.

J Resolution: Done.

6) Comment:

Section 3.0 sentence " Common cause counterparts for the RAW calculation..."is not correct, instead, state that " Common cause related basic events were set equat tc their corresponding Beta factor instead of being set equal to true. This will represent the potential of common cause falure of the other train given that one train is assumed to be failed."

m as7s.se NORTHEAST UTILrTIES SERVICE COMPANY' 833:'T M*3 Faieta-=-en perf e-mem critaria 3Y 3. r. calvue MTE ___ 10 /29 /g 6 cEK::. 3Y 1Q MTE - ib (

cw:. yo. ,u. m .ese.3. ,

SEEET NO.  ??

,,v.

m CF 4 Resolution: Done.

7) Comment:

Section 3.0 should have a discussion on how the dominant sequence cutset file was modified to represent the system train importance. In addition, provide the basic event listing which made up the selected system trains.

Resolution: Done.

8) Comment:

Aher reviewing the importance measure results h was noticed that the FV value for the service water pump trains were large as compared to the original results the probable reason being the treatment of the CCF basic events. For example in the RRW calculation for SW the CCF events were set equal to zero. So if one had a CCF basic event representing 4 of 4 SW pumps to run it was set to zero; where as if the 'A' SW pump train was considered totally reliable there would still be a CCF event amongst the other three pumps which could have been added. To get an idea of how important of a contribution this is to the FV please run a case where the CCF events are not set equal to zero and determine the FV value.

Resolution:

For SW the CCF basic event for the 'A' and 'C' trains is SWMODC1 and for th and 'D' trains it is SWMODC2. Both of these basic events appear in only one cutset reo'esenting 1.10E 08 probability. Hence, not setting these events to zero would resul1in a negligible change in FV,

EAO 8/20/96 MP3 Performance Criteria OA Comments

1) Pg 4 Revision 2 was performed based on the: -.final .

signoff of MP3PRA5A. This resulted in updated importance measure An addition, the risk significance of all systems modeled in the PR .

determined based on three cri+ieria: in the top 90% of the cutse ,

added to text regarding risk significance dete criteria.

revision. Restate Rev. 2 sentence ,.

in Section 1.0 to include the f

2) Pg 5 Section 3.0 sentence " Common cause counterparts for the calculation..." is not correct. Instead, state that
  • Common cause to true. This will represent the potential of com train given that one train is assumed to be failed."

,f ,

I

3) Pg 5 Section 3.0, shouldn't there be a discussion on how the do secuence cutset file were modified to represent the system train. In provide the basic event listing which made up the selected ,
4) Pg 6 The FV decription on the top of the page is no!_longer . , .. true
5) The orginal footnotes on the perfomtance criteria table are no lo table only peninent. the ones regarding risk significance. These should be added in f.L..,; m ) .'
6) Also involving the risk significance determination of a train valve valves 4 loops). Need to state with verbage from com L,f.. ,l, 'i

.,,, / EM 7) Aher reviewing the importance measure results, noticed that th

,.y '

. ' * " Zhe service water pump trains were large as com . r

, l '. , ' the CCF events were set equal to 0. So if you had CCF of 4 of 4 SW p

. J * [ run, this was set equal to 0.0. Where if the A SW pump train was consider

,., n ' l' f, totally reliable, there is still a CCF event amongst the oth

/'

a' case where the CCF events are not set equal value.

8) When examining the results, the FV for the charging pump trains quite high compare: to other systems. Charging is used for seal cooling injection and recirculation; however, RPCCW is also used for RC

and HPSIis used for injection and recirculation. Both these systems have much lower FV values, if the FV value is compared to AFW and DG trains it is slightly higher which does not appear to be right. Please check the cale. and state what

[ basic events are resulting in this high FV value.  ; _. .

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gUBJECT. M71 knieta-=* a perfe-manca critaria 3Y 3. D. Calvame DATE 10/29/96 CERD. SY D DATE IS Sbbk cuc. ,0. m ..,m .eie.s..,

nn. ,

SEE27 WO. 22 0F 19

7.0 Attachments

A) See Reference 1.

B) See Reference 2.

C) See Reference 3.

D) See Reference 4.

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

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