ET-NRC-93-3965, Nonproprietary AP600 Sensitivity Analyses

From kanterella
Jump to navigation Jump to search
Nonproprietary AP600 Sensitivity Analyses
ML20153F441
Person / Time
Site: 05200003
Issue date: 07/31/1993
From:
WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:
Shared Package
ML20153F439 List:
References
ET-NRC-93-3965, NUDOCS 9809290129
Download: ML20153F441 (19)
v • d • e


Text

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

F EVENT TREES DEVELOPMENT & QUAURCATION ____._..

ffee -

06/26/92

= _

  • = ; , .. s~,2 i
I l
$ .!  !~ ji! -

! 3 5_

  • n i a' i,

ep s= -n ga as u s < =, =  ;

I!!.

g7

- ga

  • I[

7s

a SI

=3 5-

.= ua W5 iI i

f gg

,(; ;,

T52 5' t :: n i ts a. i ...

ea .ea l .ae- I .*  := ! se l : wah*: set' rats I i  :.

3 :s I

.,a  !: .f.. . ..  ;

. :. $ ., l

.. m , ,,

Cat.M

.... . s, 9 JK

i. 2 1 11 3 ia >

.... i.... i3 ,,

  • 848 L4 ,,

$$ 34 000

..... i. s, Cat.m

.... i, ..

i. u i' =

.. i.,.. ,, .,

.wi ei -.

. ease n >

.... n .,

C,,

.xi ,. ..

e5

  • n~ u u.

Figure F-24 Loss of Decay Heat Removal During Shutdown Event Tree T Westinghouse f,1c d .3 ei e ( <

9009290129 980922 ~

PDR ADOCK 05200003 g A PDR-

l l

j ET-NRC-93-3965 l SEPTEMBER 20,1993 1

i M

i i

AP600 Sensitivity Analyses July 1993 R Al 720.12(R); Page 1 July 1993

1 l

1.0 Introduction l

This document suppons RAJ response 720.12. revision 1. Four separate sensitivity analyses were performed. The methodology and results of the analyses are described in the following sections.

1 2.0 Sensitivity Analyses i Sensitivity analyses were performed to evaluate the impact of dominant basic events and dominant groups of mechanical or electrical components on the AP600 release category and core damage frequencies during power operation. The sensitivity analyses performed are:

Impact of dominant basic events on core damage and release category frequencies Based on the importance analysis results for core damage and release categories (Tables F-8 A and G-6 in Appendices F and G of the AP600 Probabilistic Risk Assessment Report), the failure probabilities of the most dominant basic events (those basic events having import .nce factors greater than or equal to i percent) were increased by a factor of 10. The failure probabilities were then used to evaluate their impact on the core damage frequency and release category frequencies.

Impact of protection system component common cause failures on core damage frequency and release category frequencies L The preceding methodology was used for this sensitivity analysis with one exception: only the dominant protection system component common cause failures were taken into consideration.

i i Impact of check valve group, motor-operated valve group, and operator action group on core damage i frequency l

These sensitivity analyses considered the impact of increasing the failure probabilities by a factor of 10 of the dominant check valves, motor-operated valves, and operator errors on the core damage frequency.

! Impact of motor-operated valve group and operator action group on CI release category frequency These sensitivity ans - asidered the impact of increasing the failure probabilities by a factor of 10 of the dominant mottavrated valves and operator errors on Cl release category frequency.

3.0 Results The following are the results from the sensitivity analyses:

l l

l Increasing an individual basic event failure probability by a factor of 10 does not affect the core l damage and CI release category frequencies significantly. (See Tables 720.12-1 and -4). However, some failures affect individual release categories OKP and CC. (See T%les 720.12 2 and -3).

4 RAI 720.12(R1) Page 2 July 1993 l

l

Increasing the probability of the group of dominant protection system component common cause failures by a factor of 10 affects the core damage frequency by a factor of 4.2 and the CI release category frequency by a factor of 5.5. (See Tables 720.12-5 and -8).

Factors of the OKP and CC release category frequencies are linearly related to those of the dominant protection system component common cause failures. That is, if the dominant protection system component common cause failures are increased by a factor of 10 then the OKP and CC release category frequencies will be increased by a factor of 10. (See Tables 720.12-6 and -7).

Increasing the probability of the group of dominant IRWST check valves by a factor of 10 increases the core damage frequency by a factor of 13.6 due to the multiple check valves appearing in the same cutset. Also, these same cutsets are counted for more than once (e.g. one for each basic event); this causes some over-estimation of the total importance of all basic events in this group. However, in this case the over-estSnation is not large enough to warrant correction action. (See Table 720.12-9.)

Increasing the probability of the group of dominant motor-operated valves by a factor of 10 affects the core damage and release category frequencies by less than a factor of 4. (See Tables 720.12-10 and -12.)

Increasing all dominant operator action failure probabilities by a factor of 10 affects the core damage frequency by a factor of 3.6 and the CI release category frequency by a factor of 6.5. (See Tables 720.12-11 and -13.)

4.0 Conclusion Increase in the failure probabilities of the dominant basic events or the dominant component groups (e.g.

check valve group, motor-operated valve group, operator action group, etc.) by a factor of 10 does not result in the core damage and the to;al release category frequencies that exceed the Westinghouse design goals (l.0E-05 for core damage and 1.0E-06 for release.)

l RAl 720.12(R1) Page 3 July 1993 I

Table 720.121 (Sheet 1 of 2)

Impact of Dominant Basic Events on Core Damage Frequency (At Power)

Base Case Sensitivity Study Sensitsity Study Core Damage Basic Esent Basic Esent Dasic Esent Core Damage Frequency I.D.

  • Failure Prob. Failure Prob. Frequency with q, increasing Factor (q) (q, = 10q) (F i ) (R = F, / 3.3E 07)"

CCX DAS 1.00E-03 1.00E-02 8.6E-07 2.6 IWX-CV-AO 1.50E-04 1.50E-03 8.1 E 07 2.4 LPM-MANO3 8.30E-02 8.30E 01 8.1 E 07 2.4 DAS 9.00E 03 9.00E-02 6.9E-07 2.1 l

CCX-40EAl 1.40E 05 1.40E-04 6.3E 07 1.9 f

CCX-HARD1 3.30E-05 3.30E-04 61E 07 1.8 l

ATW-MANO3 1.53E-02 1.53E-01 6.0E-07 1.8 RCX-RB FA 1.80E-04 1.80E 03 5.5 E-07 1.7 IWACV122AO 8.76E-03 8.76E-02 5.0E-07 1.5 IWACV123AO 8.76E 03 8.76E-02 5.0E 07 1.5 IWACV124AO 8.76E 03 8.76E-02 5.0E-07 1.5 IWACV125AO 8.76E 03 8.76E-02 5.0E-07 1.5 MGSET 8.74E 03 8.74E 02 4.9E 07 1.5 CCX 51EHX 5.30E 06 5.30E-05 4.7E-07 1.4 CCX-03XTS 1.80E-05 1.80E-04 4.6E 07 1.4 CCX AV-LA 6.20E-05 6.20E-04 4.4E-07 1.3 CCX TT-UF 1.40E 04 1.40E 03 4.3E 07 1.3 CCX DU-SA 7.30E-05 7.30E 04 4 2E 07 1.3 CCX EEMM12 3.20E 06 3.20E-05 4.2E-07 1.3 dis 9.00E-03 9.00E 02 4.1 E-07 1.2 LPM MAN 04 8.30E 02 8.30E-01 4.1E 07 1.2 CCX 19 YA 3.00E 06 3.00E-05 4.1 E-07 1.2 LPM-MAN 01 2.20E-03 2.20E 02 4.0E 07 1.2 IWX CV1-AO 6.00E 05 6.00E-04 4.0E-07 1.2  !

I RAl 720.12(R1) Page 4 July 1993

l Table 720.121 (Sheet 2 of 2)

Impact of Dominant Basic Events on Core Damage Frequency

, (At Power) _

Base Case Sensitisity Study Sensitisity Study Core Damage Basic Esent flasic Esent Basic Esent Core Damage Frequency I.D.

  • Fauure Prob. Fauure Prob. Frequency with q, Increasing Factor (q) (q, = 10q) (F,) (R = F, / 3JE-07)"

OTH PM1 2.10E-02 2.10E 01 3.9E-07 1.2 l IWA-PLUG 5.00E-05 5.00E-04 3.9E 07 1.2 l OTH-SGTR1 8.00E-03 8.00E-02 3.8E 07 1.1 l

RNNMOD08 1.16E-02 1.16E 01 3.7E 07 1.1 l

RNNMODOS 1.14E-02 1.14E-01 3.7E-07 1.1 f REAMV117GO 1.10E-02 1.10E-01 3.7E 07 1.1 l

REAMV118GO 1 10E-02 1.10E-01 3.7E-07 1.1 l ZANMOD02A 1.27E-02 1.27E-01 3.7E-07 1.1 l

OTH SGTR 1.60E 02 1.60E-01 3.7E 07 1.1 i

  • Dominant basic faults in the analysis having importance factor greater than or equal to 1% (see Table F 8A in AP600 Probabilistic Risk Assessment).

I

" Core damage frequency (CDF) increasing factor was calculated as the new CDF (F,) shown in this table divided by the base case CDF (3.3E 07).

i RAl 720.12(R1) Page 5 July 1993

Table 720.12-2 Impact of Dominant Basic Events on OKP Release Category Frequency (At Power) l Ilase Case Sensitivity Study Sensitivity Study OKP Ilasic Event flasic Esent Basic Esent OKP Release Category I.D.

  • Failure Prob. Failure Prob. Release Category Frequency Frequency with q, Increasing Factor (q) (q, = 10q) \

(F,) ( R = F, / 5.6E-08)" l CCX-DAS 1.00E-03 1.00E-02 5.4E-07 9.6 l

CCX 40EAl 1.40E-05 1.40E-04 3.4E 07 6.' l I CCX-51EHX 5.30E 06 5.30E-05 1.6E 07 2.8 CCX-EEMM12 3.20E-06 3.20E-05 1.2E 07 2.1 l

CCX 19-YA 3.00E-06 3.00E-05 1.1 E 07 2.0 l  !

DAS 9.00E 03 9.00E-02 7.7E 08 1.4 l

dis 9.00E 03 9.00E 02 7.7E-08 1.4 l

)

  • Dominant basic faults in the analy is having importance factor greater than or equal to 1% (see Table G-6 in AP600 Probabilistic Risk Asses ament).
    • OKP release category frequency irreasing factor was calculated asthe new OKP release category  !

frequency (F,) shown in this table divided by the base case OKP release category frequency (5.6E 08).

i l

l I

4 4

RAl 720.12(R1) Page 6 July 1993

?

l i

Table 720.12-3 Impact of Dominant Basic Events on CC Release Category Frequency (At Power) l m Base Case Sensitisity Study Sensitivity Study CC Release Category Basic Esent Basic Event Basic Esent CC Release Category Frequency I.D.

  • Failure Prob. Failure Prob. Frequency with qi Increasing Factor l (q) (q, = 10q) (F i ) (R = F, / 7.6E 10)"

CCX AV-LA 6.20E 05 6.20E-04 7.4E 09 9.7 LPM MANO3 8.30E-02 8.30E 01 6.9E 09 9.1 l CCX HARD1 3.30E-05 3.30E 04 4 2E 09 5.5 l l CCX 03XTS 1.80E-05 1.80E 04 2.6E 09 3.4 DlS 9.00E 03 9.00E-02 1.3E-09 1.7 l

CCX-51 EHX 5.30E-06 5.30E-05 1.3E-09 1.7 CCX EP-SA 4.40E-06 4 40E-05 1.2E 09 1.6 CCX.EEMM12 3.20E-06 3.20E-05 1.1 E-09 1.4 CCX 19-YA 3.00E-06 3.00E 05 1.0E-09 1.4 DAS 1.00E-03 1.00E-02 9.1E 10 1.2 i

l

  • Dominant basic faults in the analysis having importance factor greater than or equal to 1% (see Table G-6 in AP600 Probabilistic Risk Assessment).

'CC release category frequency increasing factor was calculated as the new CC release category frequency (F,) shown in this table divided by the base case CC release category frequency (7.6E 10).

l RAl 720.12(R1) Page 7 July 1993

. ___ ___ _ _ . _ _. _ . . _ ____._ _ _ _ . . _ . . _ . . _ _ _ ~ . _ _ _ __ _ _ . .

Table 720.12 4 (Sheet 1 of 2)

Impact of Dominant Basic Events on Cl Release Category Frequency (At Power) b Base Case Sensitivity Study Sensitisity Study CI Release Category l Basic Esent Basic Esent Basic Esent CI Release Category Frequency I 1.D.

  • Failure Prob. Failure Prob. Frequency with q, Increasing Factor (q) (q, = 10q) (F )

i (R = Fi / 2.0E 08)"

LPM MANO3 8.30E 02 8.30E 01 7.9E-08 3.9 OTH SGTR1 8.00E-03 8.00E 02 5.9E 08 2.9 OTH PM1 2.10E-02 2.10E-01 5.8E-08 2.9 OTH CNB 5.00E-02 5.00E 01 5.4 E-08 2.7 CCX DAS 1.00E-03 1.00E-02 5.3E 08 2.7 OTH SGTR 1.60E-02 1.60E 01 5.0E-08 2.5 CCX-40EAl 1.40E-05 1.40E-04 4.8 E-08 2.4 CCX HARD1 3.30E-05 3.30E-04 4.7E-08 2.3 CIX MAN 00 1.00E 01 1.00E+00 4.7E-08 2.3 OTH-PM 1.10E-02 1.10E 01 4.4E-08 2.2 DAS 9.00E 03 9.00E 02 3.8E-08 1.9 PO 2.50E-03 2.50E 02 3 4E-08 1.7 TIME CVSNO 9.85E-01 9.85E+00 3.4E 08 1.7 ATW MANO3 1.53E 02 1.53E 01 3.3E-08 1.7 CCX-FU RO 2.80E 07 2.80E-06 3.3E 08 1.7 i

CCX-03XTS 1.80E-05 1.80E 04 3.3E-08 1.7 RCX RB FA 1.80E-04 1.80E 03 3.1 E 08 1.6 SFN MAN 00 9.40E 04 9.40E 03 3.1 E-08 1.5 SFNMV038GO 8.76E-02 8.76E-01 3.0E-08 1.5 CCX TT-UF 1.40E-04 1.40E 03 2.9E-08 1.4 CVNAV171LA 8.76E 03 8.76E-02 2.9E 08 1.4 MGSET 8.74E-03 8.74E-02 2.8E-08 1.5 DlS 9.00E-03 9.00E-02 2.6E-08 1.3 OTH-VAL 2 2.00E-01 2.00E+00 2.6E-08 1.3 R Al 720.12(R1) Page 8 July 1993

Table 720.12-4 (Sheet 2 of 2)

Impact of Dominant Basic Events on Cl Release Category Frequency (At Power)

Ilase Case Sensitisity Study Sensitisity Study CI Release Category flasic Esent flasic Esent liasic Esent CI Release Category Frequency I.D.

  • Failure Prob. Failure prob. Frequency with q, Increasing Factor (q) (qi = 10q) (F,) ( R = F, / 2.0E-08)"

CCX 51EHX 5.30E 06 5.30E-05 2.6E-08 1.3 h IWX CV AO 1.50E 04 1.50E 03 2.6E-08 1.3 ll CIX-AV LA 7.70E-04 7.70E 03 2.6E 08 1.3 ll TIME-CVSO 1.50E 02 1.50E-01 2.6E-08 1.3 ll OTH ROS 5.90E 01 5.90E+00 2.5E-08 1.3 ll CCX AV-LA 6.20E-05 6.20E 04 2.5E-08 1.3 ll CCX DU.SA 7.30E 05 7.30E 04 2.5E-08 1.2 ll CCX EEMM12 3 20E-06 3 20E-05 2.4E-08 1.2 ll CCX BY-PN 3.90E-05 3.90E 04 2.3E 08 1.2 ll CCX EP SA 4.40E 06 4.40E 05 2.3E 08 1.1 l

RNNMODOB 1.16E 02 1.16E 01 2.3E-08 1.1 l

RNNMODOS 1.14E 02 1.14E 01 2.3E-08 1.1 l

REAMV117GO 1.10E-02 1.10E 01 2.3E-08 1.1 ll REAMV118GO 1.10E 02 1.10E 01 2.3E 08 1.1 ll CCX 19 YA 3.00E 06 3.00E 05 2.2E 08 1.1 ll l

CCX 19-SA 1.10E 05 1.10E 04 2.2E 08 1.1 ll LPM MAN 01 2.20E 03 2.20E 02 2.2E-08 1.1 ll PMX PLC 1.10E 05 1.10E-04 2.2E-08 1.1 h

MSGTR 3.20E-02 3.20E 01 2.2s-08 1.1 ll ZANMOD02 1.27E-02 1.27E-01 2.2E-08 1.1 ll

    • Cl release category frequency increasing factor was calculated as the new Cl release category frequency (F,) shown in this table divided by the base case Cl release category frequency (2.0E-08).

R AI 720.12(R1) Page 9 July 1993

Table 720.12 5 Impact of Dominant Protection System Component Common Cause Failures on Core Damage Frequency (At Power)

Base Case Sensitivity Study Sensitivity Study Core Damage Basic Event Basic Esent Basic Esent Core Damage Frequency I.D.

  • Failure Prob. Fauure Prob. Frequency with q,'s Increasing Factor (q) (q, = 10q) (F i ) (R = F, / 3.3E-07)"

CCX 40EAl 1.40E-05 1.40E 04 CCX HARD1 3.30E-05 3.30E-04 CCX 51EHX 5.30E-06 5.30E 05 CCX-03XTS 1.80E-05 1.80E 04 1.4E 06 4.2 CCX DU-SA 7.30E 05 7.30E-04 CCX EEMM12 3.20E-06 3.20E 05 CCX-19-YA 3.00E-06 3.00E 05

  • Dominant protection system component common cause failures having importance factor greater than or equal to 1% (see Table F-8A in AP600 Probabilistic Risk Assessment).

" Core damage frequency (CDF) increasing factor was calculated as the new CDF (F,) shown in this table divided by the base case CDF (3.3E-07).

RAl 720.12(R1) Page 10 July 1993

l l

Table 720.12 6 l Impact of Dominant Protection System Component Common Cause Failures l on OKP Release Category Frequency (At Power)

' l Base Case Sensitivity Study Sensitivity Study OKP Release Category Basic Esent Basic Esent Basic Event OKP Release Category Frequency I.D.

  • Failure Prob. Failure Prob. Frequency with qi's Increasing Factor (q) (qi = 109) (F,) (R = F, / 5.6E-08F*

CCX 40EAl 1.40E-05 1.40E 04 '

CCX 51EHX 5.30E-06 5.30E 05 CCX EEMM12 3 20E-06 3.20E-05 5.6E-07 10.0 CCX 19 YA 3.00E 06 3.00E 05 l l

l

  • Doniinant protection system component co.Timon cause failures having importance factor greater than or '

equal to 1% (see Table G-6 in AP600 Prot abilistic Risk Assessment).

"OKP release category frequency increasing factor was calculated as the new OKP release category frequency (F,) shown in this table divided by the base case OKP release category frequency (5.6E 08).

l l

l RAl 720.12(R1) Page 11 July 1993

Table 720.12-7 Impact of Dominant Protection System Component Common Cause Failures on CC Release Category Frequency (At Power) b - - - - - . . .

Ilase Case Sensitivity Study Sensitivity Study CC Release Category flasic Esent Itasic Esent liasic Esent CC Release Category Frequency I.D.

  • Fauure Prob. Fauure Prob. Frequency with q,'s Increasing Factor (q) (q, = 10q) (F i ) (R = Fi / 7.6E-10)"

CCX HARD1 3.30E-05 3.30E 04 CCX-03XTS 1.80E 05 1.80E-04 CCX-51EHX 5.30E 06 5.30E 05 7.6E-09 10.0 f CCX EP-SA 4.40E-06 4.40E-05 CCX EEMM12 0?cE-oc 3.20E-05 CCX 19-YA 3.00E-06 3.00E-05

' Dominant protection system cornponent common cause failures having importance factor greater than or equal to 1% (see Table G-6 in AP600 Probabilistic Risk Assessment).

"CC release category frequency increasing factor was calculated as the new CC release category frequency f

(F,) shown in this table divided by the base case CC release category frequency (7.6E 10).

i RAl 720.12(R1) Page 12 July 1993

Table 720.12-8 Impact of Dominant Protection System Component Common Cause Failures on Cl Release Category Frequency (At Power)

_d Base Case Sensitivity Study Sensitivity Study CI Release Category Basic Esent Basic Esent Basic Event CI Release Category Frequency I.D.

  • Failure Prob. Failure Prob. Frequency with gi's increasing Factor (q) (qi = 10q) (F i ) (R = F, / 2.0E 08)"

CCX 40EAl 1.40E 05 1.40E-04 CCX HARD1 3.30E 05 3.30E-04 CCX 03XTS 1.80E 05 1.80E+04 CCX 51EHX 5.30E 06 5.30E-05 1.1 E-07 5.5 CCX DU.SA 7.30E 05 7.30E 04 CCX EEMM12 3.20E 06 3.20E-05 CCX EP SA 4.40E 06 4.40E+05 CCX 19 YA 3.00E 06 3.00E 05 CCX 19 SA 1.10E 05 1.10E-04

  • Dominant protection system component common cause failures having importance factor greater than or equal to 1% (see Table G-6 in AP600 Probabilistic Risk Assessment).

"Cl release category frequency increasing factor was calculated as the new Cl release category frequency (F,) shown in this taba divided by the base care Cl release category frequency (2.0E-08).

RAl 720.12(R1) Page 13 July 1993

9 4

Table 720.12-9 Impact of Dominant Check Valve Group on Core Damage Frequency (At Power) ,

met I Base Case Sensitisity Study Sensitivity Study Core Damage Basic E5ent Basic Esent Basic Event Core Damage Frequency I.D

  • Failure Prob. Failure Prob. Frequency with q,'s increasing Factor (q)" (q, = 10q) (F,) (R = F, / 3JE-07)*

IWACV122AO 8.76E 03 8.76E-02 IWACV123AO 8.76E-03 8.76E-02 l

IWACV124AO 8.76E 03 8.76E 02 4.5E 06 13.6 IWACV125AO 8.76E-03 8.76E-02 d

IWX CV AO 1.50E 04 1.50E-03 IWX CV1 AO 6.00E 05 6.00E 04 ,

' Dominant check valves (and their common cause) in the analysis having importance factor greater than or equal to 1% (see Table F 8A in AP600 Probabilistic Risk Assessment).

"The check valve group consists of RWST check valves whose failure probability in the base case PRA is based on the conservative " advt rse conditions" check valve failure rate.

"* Core damage frequency (CDF) increasing factor was calculated as the new CDF (F1) shown in this table divided by the base case CDF (3.3E 07).

l RAI 720.12(R1) Page 14 July 1993

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

Table 720.12-10 Impact of Dominant Motor-Operated Valve Group on Core Damage Frequency (At Power) i i Base Case Sensitivity Study Sensitivity Study Core Damage l Basic Event Basic Event Basic Event Core Damage Frequency i

1.D,

  • Failure Prob. Failure Prob. Frequency with q,'s increasing Factor (q) (q, = 10q) (F,) (R= F, / 3.3E-07)"

REAMV117GO 1.10E-02 1.10E-01 4.0E-07 1.2 REAMV118GO 1.10E-02 1.10E-01

  • Dominant motor-operated valves in the analysis having importance factor greater than or equal to 1% (see Table F 8A in AP600 Probabilistic Risk Assessment).

" Core damage frequency (CDF) increasing factor was calculated as the new CDF (F,) shown in this table divided by the base case CDF (3.3E 07).

l l

l l

RAI 720.12(RI) Page 15 July 1993

Table 720.1211 Impact of Dominant Operator Action Group on Core Damage Frequency (At Power)

Base Case Sensitivity Study Sensitivity Study Core Damage Basic Esent Basic Esent k

Basic Esent Core Damage Frequency I I.D.

  • Fauure IYob.' Fauure IYoh. Frequency with qi's increasing Factor (q) (qi = 10q) W)i (R = Fi / 3.3E-07)"

I LPM MANO3 8.30E 02 8.30E-01 ATW MANO3 1.53E 02 1.53E 01 LPM MAN 04 8.30E 02 8.30E-01 1.2E-06 3.6 LPM-MAN 01 2.20E 03 2.20E-02

  • Dominant operator actions in the analysis having importance factor greater than or equal to 1% (see Table F 8A in AP600 Probabilistic Risk Assessrrent).

" Core damage frequency (CDF) increasing factor was calculated as the new CDF (F ) shown in this table dwided by the base case CDF (3.3E-07).

RA1720.12(R1) Page 16 July 1993

l Table 720.12-12 Impact of Dominant Motor Operated Valve Group on Cl Release Category Frequency I l , (At Power) l Base Case Sensitivity Study Sensitivity Study Cl Release Category i Basic Esent Basic Esent Basic Event Cl Release Category Frequency I.D.

  • Fauure Prob. Fauure prob. Frequency with qi s '

increasing Factor (q) (qi = log) (F i ) (R = Fi / 2.0E.08)" ,

1 REAMV117GO 1.10E-02 1.10E-01 l

REAMV118GO 1.10E 02 1.10E-01 4.4E-08 2.2 SFNMV038GO 8.76E 02 8.76E 01

  • Dominant motor operated valves in the analysis having importance factor greater than or equal to 1% (see Table G-6 in AP600 Probabilistic Risk Assessment).

"Cl release category frequency increasing factor was calculated as the new Cl release category frequency (F,) shown in this table divided by the base case Cl release category frequency (2.0E 08). I I

l i

RAl 720.12(R1) Page 17 July 1993 1

Table 720.12-13 Impact of Dominant Operator Action Group on Cl Release Category Frequency l (At Power) l Base Case Sensitivity Study Sensitivity Study CI Release Category  !

j Basic Esent Basic Event Basic Esent CI Release Category Frequency I.D.

  • Failure Prob. Failure Prob. Frequency with q,'s Increasing Factor (q) (q, = 10q) W,) (R = F, / 2.0E-08)"

LPM MANO3 8.30E 02 8.30E 01 CIX-MAN 00 1.00E-01 1.00E+00 ATW-MANO3 1.53E 02 1.53E 01 1.3E 07 6.5 SFN-MAN 00 9.40E-04 9.40E 03 LPM MAN 01 2.20E 03 2.20E-02

'Dorninant operator actions in the analysis having importance factor greater than or equal to t% (see Table G-6 in AP600 Probabilistic Risk Assessment).

"Cl release category frequency increasing factor was calculated as the new Cl release category frequency (F,) shown in this table divided by the base case Cl release category frequency (2.0E-08).

RAl 720.12(R1) Page 18 July 1993

Retrieved from "https://kanterella.com/w/index.php?title=ET-NRC-93-3965,_Nonproprietary_AP600_Sensitivity_Analyses&oldid=3444517"