ML20112E116
ML20112E116 | |
Person / Time | |
---|---|
Site: | Wolf Creek ![]() |
Issue date: | 05/30/1996 |
From: | Muench R WOLF CREEK NUCLEAR OPERATING CORP. |
To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
References | |
ET-96-0034, ET-96-34, GL-88-20, NUDOCS 9606050155 | |
Download: ML20112E116 (72) | |
Text
_,
I Wf#LF CREEK NUCLEAR OPERATING CORPORATION Richard A. Muench Vice President Engineering May 30, 1996 l
ET 96-0034 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-137 J
Washington, DC 20555-0001 1
l
Reference:
Letter Number WM 95-0128 Dated August 30, 1995, from N.
S. Carns, WCNOC, to U.S. Nuclear Regulatory Commission
Subject:
Docket No. 50-482: Response to Request for Additional Information Associated to the Human Reliability Analysis Gentlemen:
The reference letter provided Wolf Creek Nuclear Operating Corporation's (WCNOC) response to the Request for Additional Information (RAI) for the Wolf Creek Generating Station (WCGS) Individual Plant Examination (IPE).
The RAI was transmitted to WCNOC by letter dated June 28, 1995, from J. C. Stone, NRC, to N.
S.
Carns.
Included within the reference letter was a commitment by WCNOC to revise the Human Reliability Analysis (HRA) to improve the utilization of. performance shaping factors, diagnostic errors,- incorporation of plant specific practices and experiences, and dependencies of operator actions.
The commitment included a completion date for the revised HRA of April 30, 1996 and a provision to notify the NRC of any new significant systematic core damage sequences which were identified as a result of the reanalysis.
l On April 17, 1996, a teleconference call between NRC and WCNOC personnel took place during which the NRC expreetsed concerns regarding the HRA performed for the IPE and the RAI commitment to revise the HRA.
The NRC outlined the specific areas of concern with the HRA performed for the IPE and indicated that they would be unable to conclude, based on the IPE HRA, that the WCGS IPE satisfied the intent of Generic Letter 88-20.
The NRC'also indicated that they would not be able to make any judgment regarding the suitability of the revised HRA analysis on the basis of a notification of any new significant systematic core damage sequences identified as a result of this reanalysis.
The NRC also indicated, during the April 17, 1996 teleconference call, that the Common cause analysis portion of the IPE was perceived to be an " area of weakness."
i 9606050155 960530 1040 PDR ADOCK 05000482 I
r P
PDR PO, Box 411/ Burlington, KS 66839 / Phone: (316) 364-8831 i
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l An Equal Opportunity Employer M F:HCVET J
- ET 96-0034-
- Page 2 of 2 i
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WCNOC committed to provide to the NRC, by~the end of May 1996, a submittal-to-
-include a discussion of the revised HRA, a discussion of a revised Common Cause analysis utilizing generic Common Cause Factors (CCF) and the impact of the revised HRA and Common Cause analysis on the core damage frequency (Level
- 1) results.
The attachment to this letter provides the information discussed above.
If you have ' any questions' concerning this matter, please contact me - at (316) 364-8831, extension 4034, or Mr. Terry S. Morrill at extension 8707.
Very truly yours, 0 awd i
Richard A. Muench
> RAM /jra i
Attachment cc
'L.
J.
Callan (NRC), w/a W. D. Johnson (NRC), w/a
.J.
F. Ringwald (NRC), w/a J. C. Stone (NRC), w/a l
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i Attachment to ET 96-0034 Page 1 of 69 Table of Contents REVISED IIUMAN RELIABILITY ANALYSIS 2
REVISED COMMON CAUSE ANALYSIS 17 CORE DAMAGE SEOUENCE OUANTIFICATION RESULTS 44 i
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'Attachmsnt to ET 96-0034 Page 2 of 69 Revised Human Reliability Annivsis k
WCNOC described the methodology utilized for the Human Reliability Analysis (HRA) i for the IPE in the response to the NRC's RAI [WM 95-0128]. The HRA methodology utilized in the original analysis is described in the response to RAI Questions 11 through -
- 22. The revised Human Reliability Analysis addresses the concerns outlined in the RAI and the telecon of April 17,1996. The major differences in the revised HRA and that performed previously are as follows:
I The treatment of dependencies was changed significantly. In this analysis, the
)
operator actions were generally divided into two parts, a cognitive and an execution portion. For those events requiring multiple operator actions to resolve, the cognitive i
portions of each operator action were examined for dependence and, in some cases, l
were common. For exarr.ple, in the Steam Generator Tube Rupture (SGR) event, operator actions ODI and OD2 both require the recognition of the SGR, so a common -
cognitive event was tued for both actions. In some cases essentially the same operator action was given different values depending on the nature of the event being j
resolved, and the amount of time available for performing the action, i.e., ifless time
{
was availiole to perform the action, a higher failure probability resulted due to j
increased Performance Shaping Factors (PSFs). Dependencies were also addressed j
on recov(ry actions.
For example, if a later procedure step was credited for j
recovering the failure of a previous step, then the dependency of the recovery step on i
the failure of tia earlier step was addressed. Also, once a final core damage run was completed, a dett.iled review of the cutsets was performed so any remaining operator action dependenci:s could be addressed. In this step,10 cutsets were identified which 1
contained operatcr action dependencies previously overlooked. Table 4 lists these cutsets. Although the plant model will be revised in the long term to account for these additional dependencies, an analysis of these cutsets indicated an increase to the CDF of about 4% when the dependencies are taken into account.
Cognitive errors were generally quantified using EPRI TR-100259, Section 4, "A e
Supplementary Cause-Based Approach to the Estimation of pc." In some cases, the j
annunciator response model given in fable 20-17 of NUREG/CR-1278 was used to j
quantify operator acticus, especially when the action was due to a single annunciator (or group of annunciators relating to the same action requirement). For example, the j
operator action for manual reactor trip, OPA-MANUALRT, was treated in this manner. A discussion was provided in the write-up for each operator action which explained how the operator arrived at the procedure step (s) for that action, starting with a reactor trip, or possibly an annunciator alarm.
The 0.1 multiplier for commission errors used in the earlier HRA was eliminated.
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Attochment to ET 96-0034 l
Page 3 of 69
)
The execution errors were calculated using the Technique for Human Error Rate e
Prediction (THERP) tables contained in NUREG/CR-1278, " Handbook of Human Reliability Analysis with Emphasis on Nuclear Power Plant Applications, Final Report," dated 8/83. Values from these tables for errors of omission are divided by three based on Swain's notes in Chapter 15 of the NUREG. These notes describe adjustments to the nominal Swain values, in particular to credit the layout of the procedures into response / response not obtained format.
Calibration errors were considered, and operator actions related to calibration of the i
Refueling Water Storage Tank (RWST) level, Auxiliary Feedwater (AFW) pumps I
suction pressure and Diesel Fuel Oil Day Tank level were added. Values for these actions were calculated in a similar manner to that used for the other actions; i.e., via an analysis of the calibration procedures.
An additional multiplier of 10 was applied generically to the cognitive portion of all operator actions required during a flooding event. This was done to account for the additional stress on the operator if a flood occurred in conjunction with a plant transient. However, the multiplier was not added to the execution portion of the l
operator action, as once the correct diagnosis was made and the correct procedure was entered, then it was felt that the operators would be carrying out the steps of the relevant procedure, relatively independent of the existence of a flood.
More emphasis was placed on the amount of time available to perform an action (time I
window) versus the time needed to complete the action. For all operator actions with time restraints, these time values were determined. The stress levels placed on the operators, and 'he Performance Shaping Factors used to modify the base values, were highly dependent on amount of ' extra' time available to perform the operator actions.
In addition, a recovery action was credited only if sufficient time to perform the recovery was available. Note it was assumed that the pre-initiation actions were not time constrained. Credit for the special-one-of-a-kind recovery used previously for post-initiators was removed.
Another review of the simulator control panel was performed to verify that the layout of the controls matched that assumed in the operator action individual calculations, e.g., verification of controls credited as being dissimilar to other nearby controls, or located in functional groups was performed.
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Attachmsnt to ET 96-0034.
Page 4 of 69 Once the new values for the operator actions were determined, a core damage l
I quantification was performed using the WCGS PRA model. Significant differences between the core damage quantification using the original lira values and that performed using the new HRA values are as follows:
J The core damage frequency (CDF) value using an IE-10 cutoff for the individual cutsets increased by about 24%.
The percentage of cutsets with values greater than 1E-10 containing at least 1 operator action increased roughly 60%. This was largely due to splitting many of the actions mto separate cognitive and execution portions.
The number of cutsets with values greater than IE-10 containing at least 2 operator actions nearly doubled. As above, this was due to the splitting of the operator actions.
One cutset with an operator action increased to a value above or equal to IE-06, whereas none existed previously. This cutset was a large LOCA initiating event, followed by failure to recognize the need to switch over to low pressure recirculation.
This cutset has a value of 1.00E-06.
l The most significant increases in the IIRA values were in the OPA-OST, OPA-RCD 2, OPA-LTS, OPA-EC3 and OPA-MFW operator actions, which had increases varying from 201% to 34%. Several operator actions had significant decreases also, including OPA-MRT, OPA-MSISOL, OPA-MANUALRT, OPA-LPI and OPA-NK020A, with decreases in the two orders of magnitude range.
A comparison of the old and new HRA data is contained below in Table 1. Tables 2 and 3 give the top 100 cutsets containing at least one operator action and the top 100 cutsets containing at least two operator actions, respectively.
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AttaChm2nt to ET 96-0034 Page 5 of 69 TABLE 1 - COMPARISON OF OLD AND NEW HRA VALUES t
Basic Event ID in Original Value pc pe '
Value Imcanon Tune Limit Tune Limit. Description IIRA Notebook (Old)
(New)
(New)
(New)
(Old)
(New) 1 OPA-1EHVACA-B IEHVAC 1.00E-1.00E-2.44E-02 2.455-02 LOCAL 30 MIN OPERATOR FAILS TO PROVIDE 01 04 COOLING TO SWITCHBOARD R 2
OPA-1WS01PC WSIC2 1.48E-1.00E-6.00E-04 7.00E-04 CTRL RM 15 MIN 15 MIN FAILURE TO START SERVICE WATER 04 04 PUMP 1WS01PC 3
OPA-ABV0007 ABVLS 3.74E-None 8.60E-04 8.60E-04 LOCAL Note 9 FAILURE TO REOPEN MANUAL VALVE 04 ABV007 AFTER STS AB 4
OPA-ABV0018 ABVLS 3.74E-None 8.60E-04 8.60E-04 LOCAL Note 9 FAILURE TO REOPEN MANUAL VALVE 6
04 ABV0018 AFTER STS' Note 9 FAILURE TO REOPEN MANUAL VALVE 5
OPA-ABV0029 ABVLS 3.74E-Ncne 8.60E-04 8.60E-04 LOCAL 04 ABV029 AFTER STS AB 6
OPA-ABV0040 ABvLS 3.74E-None 8.60E-04 8.60E-04 LOCAL Note 9 FAILURE TO REOPEN MANUAL VALVE 04 ABV040 AFTER STS AB 7
OPA-ACNN ACNN 2.60E-7.00E-2.80E-02 2.80E-02 CTRL RM 2 HRS SVRL HRS HRA FAILURE TO ALIGN NN 02 05 SWITCHBORD TO ALTERNATE PO 8
OPA-AF4 Note 2 1.00E-4.60E-1.70E-03 2.20E-03 CTRL RM
--~~-
30 MIN HRA FAILURE TO OPEN AEW 02 04 ISOLATION VALVES TO STM GE 9
OPA-AFWACT MCB 1.59E-1.00E-3.50E-03 3.60E-03 CTRL RM Note 10 FAILURE TO MANUALLY ACTUATE AFW 03 04 COMPNTS AFTER SIGNAL FAILURE 10 OPA-ABPV0001 ABVLS 3.74E-None 8.60E-04 8.60E-04 I.CCAL Note 9 FAILURE TO REOPEN INSTR AIR ISOL 04 VALVE AFTER AB-20 11 OPA-ABPV0002 ABVLS 3.74E-None 8.60E-04 8.60E-04 LOCAL Note 9 FAILURE TO REOPEN INSTR AIR ISOL
[
04 VALVE AFTER AB-2G 12 OPA-ABPV0003 ABVLS 3.74E-None 8.60E-04 8.60E-04 LOCAL Note 9 FAILURE TO REOPEN INSTR AIR ISOL 04 VALVE AFTER AB-20 13 OPA-ABPV0004 ABVLS 3.74E-None 8.60E-04 8.60E-04 LOCAL Note 9 FAILURE TO REOPEN INSTR AIR ISOL 04 VALVE AFTER AB-20
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14 OPA-ALHV0006 ALHVS 8.29E-None 1.40E-04 1.40E-04 LOCAL Note 9 FAILURE TO REOPEN ALHV0006 f
04 FOLLOWING TEST PERFORMA
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15 OPA-ALHV0008 ALHVS 8.29E-None 1.40E-04 1.40E-04 LOCAL Note 9 FAILURE TO REOPEN ALHV0008 04 FOLLOWING TEST PERFORMA t
16 OPA-ALHV0010 ALHVS 8.29E-None 1.40E-04 1.40E-04 LOCAL Note 9 FAILURE TO REOPEN ALHV0010 04 FOLLOWING TEST PERFORMA 17 OPA-ALHV0012 ALHVS 8.29E-None 1.40E-04 1.40E-04 LOCAL Note 9 FAILURE TO REOPEN ALHV0012 04 FOLLOWING TEST PERFORMA i
18 OPA-ALT ALT 1.50E-1.30E-2.60E-02 3.90E-02 LOCAL 30 MIN 30 MIN HRA FAILURE TO ESTABLISH ALTR 01 02 COOLING - OFN EG-04 19 OPA-CCWHX Note 8 N/A 1.00E-2.60E-03 2.70E-03
-Local 30 MIN 30 MIN FAILURE TO CLOSE CCW HEAT 04 EXCHANGER BYPASS VALVE 20 OPA-CCWLPISO Note 3 4.00E-8.50E-2.00E-02 2.10E-02 CTRL RM 1 HR HRA FAILURE TO MANUALLY ISOLATE 02 04 CCW SERVICE LOOP 21 OPA-CCWSERLP RCPSEL 1.43E-3.00E-1.30E-02 1.60E-02 CTRL RM 6 MIN 5 MIN HRA FAILURE TO SWITCHOVER CCW 02 03 SERVICE LOOP - CCWB
}
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Attachment to ET 96-0034 Page 6 of 69 TABLE I - COMPARISON OF OLD AND NEW HRA VALUES Basic Event ID in Original Value pc pc Value location Tune Linit Tune Limit Desenpuon HRA Notebook (Old)
(New)
(New)
(New)
(Old)
(New) 22 OPA-DCSHED AFC 1.36E-Neg 1.00E-03 1.00E-03
~ OPERATOR ACTION TO SHED I4AD ON 04 SBO EVENT 23 OPA-EC3 EC3 2.15E-3.00E-7.90E-03 8.20E-03 CTRL RM 10 HRS 10 HRS HRA FAILURE OF RCS COOLDOWN AND 04 04 DEPRESSURIZE - SGR 24 OPA-ECCSTRF1 Note 2 1.00E-9.00E-2.00E-03 1.10E-02 CTRL RM 30 MIN HRA FAILURE TO STOP HP ECCS 02 03 PUMPS ON LOSS OF COOLI 25 OPA-ECCSTRP2 Note 2 1.00E-9.00E-7.70E-04 9.77E-03 CTRL RM 30 MIN HRA FAILURE TO STOP HP ECCS 02 03 PUMPS ON LOSS OF COOLI 26 OPA-EFHV0052 MCB 1.59E-1.00E-3.50E-03 3.60E-03 CTRL RM Note 10 FAILURE TO MANUALLY OPERATE 03 04 EFHV0052 27 OPA-EFHV2325 MCB 1.59E-1.00E-3.50E-03 3.60E-03 CTRL RM Note 10 FAILURE TO MANUALLY CLOSE 03 04 EFHV0023 AND/OR EFHV0025 28 OPA-EFHV2426 MCB 1.59E-1.00E-3.5CE-03 3.60E-03 CTRL RM Note 10-FAILURE TO MANUALLY OPERATE 03 04 EFHV0024 AND/OR EFHV0026 29 OPA-EFHV3738 MCB 1.59E-1.00E-3.50E-03 3.60E-03 CTRL RM Note 10 FAILURE TO MANUALLY OPERATE 03 04 EFHV0037 AND/OR EFHVC038 30 OPA-EGHV6970 MCB 1.59E-1.00E-3.50E-03 3.60E-03 CTRL RM Note 10.
FAILURE TO MANUALLY OPERATE ONE 03 04 OR MORE LOOP ISO VLVS 31 OPA-EGTV0029 MCB 1.59E-1.00E-3.50E-03 3.60E-03 CTRL RM Note 10 FAILURE TO MANUALLY OPERATE 03 04 EGTV0029 32 OPA-ES1 ES1 1.35E-3.00E-1.20E-02 1.50E-02 CTRL RM 10 HRS 10 HRS HRA FAILURE OF RCS COOLDOWN AND 04 03 DEPRESSURIZE - SIC 33 OPA-ESWA ESWA 1.10E-1.00E-6.00E-04 7.00E-04 CTRL RM 30 MIN OPERATOR FAILS TO REALIGN ESW 03 04 TRAIN A TO SERVICE WATER' 34 OPA-ESWB ESWB 1.10E-1.00F-6.00E-04' 7.00E-04 CTRL RM 30 MIN OPERATOR FAILS TO REALIGN ESW 03 04 TRAIN B TO SERVICE WATER 35 OPA-HPIACT MCB 1.59E-1.30E-3.50E-03 3.60E-03 CTRL RM Note 10 HRA FAILURE OF HPI ACTUATION ON
. 03 04 AUTO SIGNAL FAILURE 36 OPA-HPR LC2/LC3 4.97E-2.00E-1.20E-03 3.20E-03 CTRL RM 1 HR 20 MIN HRA FAILURE DURING INJECTION-04 03 RECIRC SWITCHOVER 37 OPA-LPI RRI22 7.35F-1.50E-3.9E-05 1.90E-04 CTRL RM 30 MIN 1 HR HRA FAILURE TO ESTABLISH LOW 03 04 PRESS INJECTION FUNCTION 38 OPA-LPR LC1 9.17E-2.00E-1.90E-03 '3.90E-03 CTRL RM 10 MIN 10 MIN HRA FAILURE DURING INJECTION-04 03 RECIRC SWITCHOVER 39 OPA-LTS LTS 4.38E-1.00E-1.70E-03 1.80E-03 CTRL RM 30 MIN 30 MIN HUMAN ERROR FAILURP_iv W M ISH 05 04 LONG TERM SHUTDOfft 40 OPA-MANUALRT RT 1.36E-1.00E-in pc 1.00E 04 CTRL RM 30 SEC OPERATOR FAILS TC MANUALLY (Note 5) 02 04 INITIATE A REACTGi TRIP ~
41 OPA-MANUALSI Note 1 1.02E-Included In OPA-AFWACT CTRL RM Note 10 OPERATOR FAILS TO MA. N.Y (Note 6) 04 INITIATE A SAFETY INJECTION 42 OPA-MFW MF1 6.02E-2.10E-2.10E-02 2.10E-02 CTRL RM 30 MIN 30 MIN
. FAILURE OF OPERATOR TO RESTORE 04 04 MAIN FEEDWATER j
1
Attachment to ET 96-0034 Page 7 of 69 TABLE 1 - COMPARISON OF OLD AND NEW HRA VALUES Basic Event.
ID in Original Value pc pe Value locanon Time Limit Time Limit Desenpuon iIRA Notebook (Old)
(New)
(New)
(New)
(Old)
(New) 43 OPA-MRT MRT 1.55E-1.00E-in pc 1.00E-04 CTRL RM 2 MIN 1 MIN HRA FAILURE TO MANUALLY OPEN 01 04 RDMG INPUT BREAKERS 44 OPA-MSI MS1 1.59E-6.70E-1.70E-03 8.40E-03 CTRL RM 20 MIN 15 MIN OPERATOR FAILS TO ISOLATE THE 03 03 FAULTED STEAM GENERATOR 45 OPA-MSISOL Note 3 4.00E-None 1.30E-04 1.30E-04 LOCAL 40 MIN HRA FAILURE TO LOCALLY ISOLATE 02 BLDN AFTER REMOTE ISO FAILS 46 OPA-NB112209 MCB 1.59E-1.00E-3.50E-03 3.60E-03 CTRL RM Note 10 FAILURE TO MANUALLY OPEN ONE OR
[
03 04 BOTH NRML FEEDER BRKRS 47 OPA-NE01NE02 MCB 1.59E-1.00E-3.50E-03 3.60E-03 CTRL RM Note 10 FAILURE TO MANUALLY START ONE OR 03 04 BOTH DIESEL GENS 48 OPA-OD1 OD1-DP &
1.51E-6.70E-6.35E-03 1.30E-02 CTRL RM 20 MIN 10 MIN OD1 FAILS: COOLDOWN AND OD1-COOL 02 03 DEPRESSURIZE RCS IN SGR EVENT l
49 OPA-OD2 OD2 2.90E-6.70E-3.20E-04 7.00E-03 CTRL RM SVRL 1 FR HRA FAILURE OF RCS COOLDOWN AND 03 03 HRS DEPRESS AFTER OVRFILL 50 OPA-OF2 OFC 1.76E+
1.11E-1.96E-03 3.00E-03 CTRL RM 35 MIN 30 MIN OPERATOR FAILS TO ESTABLISH
[
03 03 BLEED AND FEED COOLING 51 OPA-OFB OFB 1.76E-1.11E-3.10E-02 3.20E-02 CTRL RM 35 MIN 30 MIN OPERATOR FAILS TO ESTABLISH l-03 03 BLEED AND FEED COOLING 52 OPA-OFN-NK20A DCNK01 5.61E-5.00E-1.60E-03 1.70E-03 CTRL RM 20 MIN HRA FAILURE TO PERFORM LOCAL i
Note 7 02 05 ACTIONS OF OFN NK-020 I
53 OPA-OFN-NK20B DCNK01 5.61E-5.00E-2.70E-02 2.70E-02 CTRL RM 20 MIN HRA FAILURE TO PERFORM LOCAL Note 7 02 05 ACTIONS OF OFN NK-020 54 OPA-CP1 OP1 1.73E-2.15E-1.10E-02 1.31E-02 CTRL RM 15 MIN 15/30 MIN OPERATOR FAILS RCS COOLDOWN AND 04 03 DEPRESSURIZE/ES-11 i
55 OPA-OST OST 5.78E-2.00E-9.70E-03 1.20E-02 CTRL RM 10 MIN 10 MIN HRA FAILURE TO TERMINATE HPI FOR 05 03 SLB EVENT 56 OPA-PEF 01AB MCB 1.59E-1.00E-3.50E-03 3.60E-03 CTRL RM Note 10 FAILURE TO MANUALLY START ONE OR
{
03 04 BOTH ESW PUMPS
.j 57 OPA-PEG 01BCD MCB 1.59E-1.00E-3.50E-03 3.60E-03 CTRL RM Note 10 FAILURE TO MANUALLY START A 03 04 STANDBY CCW PUMP I
58 OPA-PORVBLOK PORVBLOCK 3.52E-2.50E-1.40E-04 3.90E-04 CTRL RM 30 MIN 30 MIN HRA FAILURE TO CLOSE A PORV 04 04 BLOCK VALVE FROM MCB i
59 OPA-RCD 1 RCD 1 1.66E-3.00E-3.69E-03 6.69E-03 CTRL RM 1 HR 1 HR OPERATOR FAILS RCS COOLDOWN AND 03 03 DEPRESSURIZE/C-0 60 OPA-RCD 2 RCD 2 1.32E-3.00E-1.10E-02 1.40E-02 CTRL RM 4 HRS OPERATOR FAILS RCS COOLDOWN AND t
04 03 DEPRESSURIZE/ES-11 l
61 OPA-RCPSEAL Note 4 4 46E-2.00E-2.20E-02 2.40E-02 CTRL RM 30 MIN HRA FAILURE TO ESTABLISH SEAL 02 03 INJ AND THERMAL BARRIER CLG 62 OPA-REF REF 7.89E-2.00E-9.41E-05 2.10E-03 LOCAL 1 HR 1 HR HRA FAILURE TO ESTABLISH RWST f
03 03 REFILL PER STEP 54
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63 OPA-RHR RHR 5.01E-3.00E-2.00E-04 5.00E-04 CTRL RM 135 MIN HRA FAILURE TO STOP RHR PUMPS
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04 04 EARLY IN HIGH PRESS EVENT i
s t
Attachment to ET 96-0034 Page 8 of G9 TABLE 1 - COMPARISON OF OLD AND NEW HRA VALUES Basic Event ID in Original Value pc pe Value Location Time Limit Tune Limit Description IIRA Notebook (Old)
(New)
(New)
(New)
(Old)
(New) 64 OPA-RRIl RRIll 5.64E-2.50E-9.10E-34 1.20E-03 CTRL RM 30 MIN 30 MIN OPERATOR ACTION TO ALIGN AND 03 04 START 1 SI OR CCP PUMPS 65 OPA-RRI2 RRI22 7.35E-2.50E-2.40E-03 2.70E-03 CTRL RM 30 MIN 30 MIN OPERATOR ACTION TO ALIGN AND 03 04 START 2 CCPS 66 OPA-RUPSG RUPSG 6.33E-Included in OPA-SGR CTRL RM 10 MIN N/A OPERATOR FAILS TO IDENTIFY THE 05 RUPTURED STEAM GEN 67 OPA-SEALINJ CCPB 4.05E-1.50E-2.80E-03 2.90E-03 CTRL RM 30 MIN HRA FAILURE TO ALIGN NORMAL OR 02 04 ALT SEAL INJECTION 68 OPA-SGKOSAB MCB 1.59E-1.00E-3.50E-03 3.60E-03 CTRL RM Note 10 FAILURE TO MANUALLY START ONE OR 03 04 BOTH HVAC UNITS 69 OPA-SGOVERFL Note 2 1.00E-4.00E-3.10E-04 4.31E-03 CTRL RM 30 MIN HRA FAILURE TO MAINTAIN SG LEVEL 03 03
- OVERFILL FAILS 70 OPA-SGR SGTR 6.36E-2.85E-None 2.85E-05 CTRL RM 10 MIN 30 MIN OPERATOR FAILS TO DIAGNOSE SGR 06 C5 EVENT HAS OCCURED 71 OPA-ALPT3789 Note 8 N/A None 1.90E-04 1.90E-04 LOCAL Note 9 OPERATOR FAILS TO CALIBRATE
- ALPT0037,
-8, AND -9 PROPERLY 72 OPA-JELSLO1A Note 8 N/A None 1.30E-03 1.30E-03 LOCAL Note 9 OPERATOR FAILS TO CALIBRATE JELSLOOO1A PROPERLY 73 OPA-JELSL21A Note 8 N/A None 1.30E-03 1.30E-03 LOCAL Note 9 OPERATOR FAILS TO CALIBRATE JELSLOO21A PROPERLY 74 OPA-JELSL121 Note 8 N/A None 6.70E-05 6.70E-05 LOCAL Note 9 OPERATOR FAILS TO CALIBRATE JELSLOC01A & -21A PROPERLY 75 OPA-BNLT903 Note 8 N/A None 1.90E-03 1.90E-03 LOCAL Note 9 OPERATOR FAILS TO CALIBRATE BNLT0903 PROPERLY
Attachmeat'to ET 96-0034 Page 9 of.69 l
TABLE 1 - COMPARISON OF OLD AND NEW HRA VALUES NOTES.
Note 1: HRA value was calculated by Westinghouse prior to original HRA notebook --
- :r' =. but was not included in notebook.
Note 2: HRA value was estimated by WCGS in the HRA notebook.
Note 3: HRA value was calculated informally by NUS Corporation subsequent to original HRA notebook -
- - G +-
I Note 4: HRA value was calculated by WCGS subsequent to original HRA notebook completion.
Note 5: Basic event was originally IIESF-MANUALRT-HE 4
Note 6: Basic event was originally HESF-MANUAL 91-HE.
4 Note 7: These actions were originally only one action, OPAM-NK020.
Note 8: This is a new operator action. '
Note 9: 1hese preinitiator actions are not considered time critical.
Note 10: Manual actuation of an automatic actuation failure. Sufficient time for manual recovery is assumed as discussed in OPA-AFWACT analysis.
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Attachment to ET 96-0034 Page 10 of 69 TABLE 2 -TOP 100 CUTSETS INCLUDING AT LEAST ONE OPERATOR ACTION No Prob.
Cutset Description i
1.00E-06 INIT-LLO OPA-LPR-COG 2
9.50E-07 INIT-LLO OPA-LPR-EXE 3
5.89E-07 INIT-TRO XXALSTMBD-CCF1-4 OPA-OFB-EXE 4
4.95E-07 INIT-SWS SWR 8-SUCCESS CNUS8-SUCCESSFUL OPA-ECCSTRP2-COG 5
3.10E-07 INIT-F3C SWR 8-SUCCESS CNUS8-SUCCESSFUL OPA-ECCSTRP2FCOG 6
2.84E-07 INIT-SGR OPA-ODI-EXE SSV-FAILS OPA-EC3-EXE 7
2.80E-07 INIT-CCW CCR8-SUCCESSFUL CNUC8-SUCCESSFUL OPA-IIPR-COG 8
2.09E-07 INIT-MLO OPA-BNLT9303-EXE 9
1.84 E-07 INIT-SWS SWR 8-FAILS OPA-ALT-EXE 10 1.58E-07 INIT-LSP XXALSTMBD-CCFI-4 OPA-OFB-EXE II I.48E-07 INIT-SGR OPA-MSI-EXE OPA-EC3-EXE 12 136E-07 INIT-LSP OPA-JELSL121-EXE SIIR-SUCCESSFUL CNUS-FAILS 13 1.33E-07 INIT-TRA XXALSTMBD-CCF1-4 XXKA-INSTRAIR-SA OPA-OFB-EXE 14 9.69E-08 INIT-LSP OPA-JELSL121-EXE 811R-FAILURE 12ilR-SUCCESSFUL CNU12-FAILS 15 9.50E-08 INIT-LLO OPA-BNL19303-EXE 16 9.17E-08 INIT-SWS SWR 8-FAILS OPA-ALT-COG 17 9.03E-08 INIT-TRA XXALSTMBD-CCF1-4 OPA-MFW-COG 18 7.76E-08 INIT-SWS OPA-RCD 2-EXE SWR 8-FAILS 19 7.01E-08 INIT-FL1 XXALSTMBD-CCF1-4 OPA-OFB-EXE 20 6.57E-08 INIT-LSP OPA-JELSL121-EXE 811R-FAILURE 1211R-FAILS 21 6.12E-08 INIT-SWS SWR 8-FAILS CNUS8-SUCCESSFUL OPA-ECCSTRPI-COG 22 6.12E 08 INIT-SWS SWR 8-FAILS CNUS8-SUCCESSFUL OPA-ECCSTRP2-COG 23 5.86E-08 INIT-CCW OPA-RCD 2-EXE CCR8-SUCCESSITL CNUC8F-FAILS 24 5.75E-08 INIT-F3C SWR 8-FAILS OPA-ALIF-COG 25 5.52E-08 INIT-SWS OPA-SGOVERFL-COG SWR 2-FAILS 26 5.49E-08 INIT-TRA OPA-RCPSEAL-EXE SLA-SUCCESSFUL TRNG-XNG02-FA XXEF-ESWA-TM 27 5.01E-08 INIT-SWS SWR 8-SUCCESS CNUS8-SUCCESSFUL OPA-RRil-EXE 28 4.95E-08 INIT-TRA XXALSTMBD-CCF1-4 MVAE-IIV0102-CC OPA-OFB-EXE 29 4.95E-08 INIT-TRA XXALSTMBD-CCF1-4 MVAE-IIV0103-CC OPA-OFB-EXE 30 4.91E-08 INIT-SWS SWR 2-SUCCESS CNUS2F-5UCCESSFL OPA-DCSIIED-EXE 31 4.67E-08 INIT-TRA XXALSTMBD-CCF1-4 OPA-MFW-EXE OPA-OFB-EXE 32 4.52E-08 INIT-FL1 XXALSTMBD-CCF1-4 OPA-IIPRF-COG 33 4.24E-08 INIT-SWS SWR 8-SUCCESS CNUS8-SUCCESSFUL OPA-ECCSTRP2-EXE 34 4.10E-08 INIT-F3C OPA-SGOVERFLFCOG SWR 2-SUCCESS CNUS2F-SUCCESSFL NR-ESWA 4
35 4.10E-08 INIT-F3C OPA-SGOVERFLFCOG SWR 2-SUCCESS CNUS2F-SUCCESSFL NR-ESWB 36 4.03E-08 INIT-TRA XXALSTMBD-CCFI-4 CBPA-PA0202-OO OPA-OFB-EXE 37 4.00E-08 INIT-TRA XXALSTMBD-CCF1-4 CBPB-PB0406-OO OPA-OFB-EXE 38 4.00E-08 INIT-TRA XXALSTMBD-CCF1-4 CBPA-PA0110-OO OPA-OFB-EXE 39 4.00E-08 INIT-TRA XXALSTMBD-CCF1-4 CBPA-PA0211-CC OPA-OFB-EXE 40 4.00E-08 INIT-TRA XXALSTMBD-CCF1-4 MPAE-PAE02-PS OPA-OFB-EXE 41 4.00E-08 INIT-TRA XXALSTMBD.CCFI-4 CBPA-PA0101-CC OPA-OFB-EXE 42 3.84E-08 INIT-F3C SWR 8-FAILS CNUS8-SUCCESSFUL OPA-ECCSTRP2FCOG 43 3.84E-08 INIT-F3C SWR 8-FAILS CNUS8-SUCCESSFUL OPA-ECCSTRPIFCOG 44 3.80E-08 INIT-TRO XXALSTMBD-CCF1-4 OPA-IIPR-COG l
Attachment to ET 96-0034 Page 11 of.69 TABLE 2 -TOP 100 CUTSETS INCLUDING AT M AST ONE OPERATOR ACTION -
No Prob.
Cutset Desenption 45 3.46E-08 INIT-F3C OPA-SGOVERFLFCOG SWR 2-FAILS 46 3.45E-08 INIT-F3A SWR 8-SUCCESS,
CNUS8-SUCCESSFUL OPA-ECCSTRP2FCOG 47 3.45E-08 INIT-F3B SWR 8-SUCCESS CNUS8-SUCCESSFUL OPA-ECCSTRP2FCOG 48 3.41E-08 INIT-SOR XXALSTMBD-CCF1-4 OPA-OFB-EXE 49 325E-08 INIT-T RA TRNG-XNG02-FA SIA-SUCCESSFUL OPA-CCWSERLP-EXE.
XXEF-ESWA-TM 50 3.20E-08 INTF-TRA XXALSTMBD-CCF1-4 MPAE-PAE02-TM OPA-OFB-EXE 51 3.19E-08 INIT-LSP OPA-JELSL121-EXE TPALT-PALO2-PR '
2HR-FAILS 52-3.19E-08 INIT-LSP OPA-JELSL21 A-EXE XXEF-ESWA-TM BHR-SUCCESSFUL CNUS-FAILS 53 3.19E-08 INIT-LSP OPA-JELSLOIA-EXE XXEF-ESWB-TM BHR-SUCCESSFUL CNU8-FAILS 54 3.01E-08 INIT-SWS OPA-RCD 2-EXE SWR 8-SUCCESS CNUS8F-FAILS j
55 2.98E-08 INIT-LSP DGNE-NE02-TM OPA-JELSLOI A-EXE 8HR-SUCCESSFUL CNU8-FAILS 56 2.98E-08 INIT-LSP DGNE-NE01-TM OPA-JELSL2I A-EXE SHR-SUCCESSI'UL CNUS-FAILS 57 2.87E-08 INIT-LSP DGNE-NE01-PR OPA-JELSL2 t A-EXE -
8HR-SUCCESSFUL CNUS-FAILS 58 2.87E-08 INIT-LSP DGNE-NE02-PR O?A-JELSLOIA-EXE
' BHR-SUCCESSFUL CNUS-FAILS 59 2.75E-08 INIT-TRA OPA-RCPSEAL-EXE SLA-SUCCESSFUL CBNB---NB0213-CO XXEF-ESWA-TM 60 2.75E-08 INIT-TRA OPA-RCPSEAL-EXE SLA-SUCCESSFUL CBNG-52NG0201-CO XXEF-ESWA-TM 61 2.75E-08 INIT-TRA OPA-RCPSEAL-EXE SLA-SUCCESSFUL
- CBNG-52NG0206-CO XXEF-ESWA-TM 62 2.67E-08 INIT-LSP DGNE-NE01-PR TPAL-PALO2-PR XXAL-MDAFWB-TM OPA-OFB-EXE 63 2.67E-08 INIT-LSP DGNE-NE02-PR TPAL-PALO2-PR XXAL---MDAFWA-TM OPA-OFB-EXE 64 2.67E-08 INIT-TRA XXALSTMBD-CCF1-4 AVBM-TV0040-OO OPA-OFB-EXE 65 2.40E-08 INIT-SLB TPAL--PALO2-PR XXAL-MDAFWB-TM OPA-OFB-EXE 66 2.33E-08 INIT-SGR OPA-ODI-EXE SSV-SUCCESS OPA-OD2-EXE 67 2.28E-08 INIT-TRO XXALSTMBD-CCF1-4 OPA-HPR-EXE 68 228E-08 INIT-LSP OPA-JELSLOIA-EXE XXEF-ESWB-TM
' SHR FAILURE 12HR-SUCCESSFUL CNU12-FAILS 69 2.28E-08 INIT-LSP OPA-JELSL21A-EXE XXEF-FSWA-TM 8HR-FAILURE 12HR-SUCCESSFUL CNU12-FAILS '
70 227E-08 INIT-TRO MPPAL0iAB-CCF12 TPAL-PAIA2-PR OPA-OFB-EXE I
71 2.24E-08 INIT-CCW CCR8-FAILS CNUC8-SUCCESSFUL OPA-HPR-COG 72 2.13E-08 INIT-LSP DGNE-NE01-TM OPA-JELSillA-EXE 8HR-FAILURE 12HR-SUCCESSFUL CNU12-FAILS 73 2.13E-08 INIT-LSP DGNE-NE02-TM OPA-JELSLOIA-EXE SHR-FAILURE 12HR-SUCCESSFUL CNU12-FAILS 74 2.12E-08 INIT-SWS OPA-RCD 2-COG SWR 8-FAILS 75 2.05E-08 LNIT-LSP DGNE-NE01-PR OPA-JELSL21 A-EXE SHR-FAILURE 12HR-SUCCESSFUL CNU12-FAILS 76 2.05E-08 INIT-LSP DGNE-NE02-PR OPA-JELSLOIA-EXE SHR-FAILURE 12HR-SUCCESSFUL CNU12-FAILS 77 2.03E-08 INIT-FL1 XXALSTMBD-CCF1-4 OPA-OFBF-COG 78 1.95E-08 INIT-LSP OPA-JELSLO1A-EXE TPAL-PAIA2-PR XXAL-MDAFWB-TM MVBB-BLCK-CLOSED 79 1.71E-08 INIT-TRO XXALSTMBD-CCFI-4. OPA-OFB-COG 80 1.70E-08 INIT-LSP OPA-JELSL121-EXE XXAL-TDAFW-TM 211R-FAILS 81 1.69E-08 INIT-TRA OPA-RCPSEAL-EXE SLA-SUCCESSFUL '
MVEF-HV0023-OO TRNG--XNG02-FA 82 1.68E-08 INIT-TRA OPA-RCPSEAL-EXE SLA-SUCCESSFUL MVEF-HV0037-CC TRNG--XNG02-FA 83 1.62E-08 INIT-TRA OPA-CCWSERLP-EXE SLA-SUCCESSFUL
. CBNG-52NG0206-CO XXEF-ESWA-TM 3*
84 1.62E-08 INIT-TRA OPA-CCWSERLP-EXE SLA-SUCCESSFUL CBNB-NB0213-CO XXEF-ESWA-TM 85 1.62E-08 INIT-TRA OPA-CCWSERLP-EXE SLA-SUCCESSFUL -
CBNG-52NG0201-CO XXEF-ESWA-TM -
86 1.60E-08 INIT-TRO MPAL-PAL 0lB-PS TPAL-PALO2-PR XXAL---MDAFWA-TM OPA-OFB-EXE 87 I.60E-08 : INIT-TRO MPAL-PALOI A-PS TPAL----PALO2-PR
.XXAL-MDAFWB-TM ' OPA-OFB-EXE 88 1.60E-08 INIT-CCW OPA-RCD 2-COG CCR8-SUCCESSFUL CNUC8F-FAILS i
V
Attachment to ET 96-0034 Page 12 of 69 TABLE 2 -TOP 100 CUTSETS INCLUDING AT LF AST ONE OPERATOR ACTION No Prob.
Cutset Description 89 136E-08 INIT-SWS TPALT-PALO2-PR SWR 2-SUCCESS CNUS2F-SUCCESSFL OPA-ECDiTRP2-COG 90 1.54E-08 INIT-LSP OPA-JELSL21 A-EXE XXEF-ESWA-TM Bi!R-FAILURE 1211R-FAILS 91 1.54E-08 INIT-LSP OPA-JELSLOIA-EXE XXEF-ESWB-TM SIIR-FAILURE 1211R-FAILS 92 1.50E-08 INIT-SLO OPA-ESI-COG OPA-IIPR-COG 93 1.44E-08 INIT-LSP DGNE-NE01-TM OPA-JELSL21 A-EXE 811R-FAILURE 1211R-FAILS 94 1.44 E-08 INIT-LSP DGNE-NE02-TM OPA-)ELSLOI A-EXE BilR-FAILURE 1211R-FAILS 95 139E-08 INIT-LSP DGNE-NE01-PR OPA-JELSL21A-EXE 811R-FAILURE 1211R-FAILS 139E-08 INIT-LSP DGNE-NE02-PR OPA-JELSLOI A-EXE 811R-FAILURE 1211R-FAILS 97 138F-08 INIT-SWS OPA-DCSIIED-EXE SWit2-FAILS 98 13f E-08 INIT-SWS SWR 8-SUCCESS CNUS8-SUCCESSFUL OPA-RRil-COG 99 137E-08 INIT-CCW OPA-RCD 2-EXE CCR8-SUCCESSFUL CNUCSF-SUCCESSFL OPA-ECCSTRPI-COG 100 136E-08 INIT-SWS SWR 8-FAILS CNUS8-SUCCESSFUL OPA-ECCST*tPI-EXE
Attachment to ET 96-0034 Page 13 of 69 TABLE 3 TOP 100 CUTSETS WITII AT LEAST 2 OPERATOR ACTIONS No Prob.
Cutset Description 1
2.84E-07 INIT-SGR OPA-ODI-EXE SSV-FAILS OPA-EC3-EXE 2
1.48E-07 INIT-SGR OPA4fSI-EXE OPA-EC3-EXE 3
4.67E-08 INIT-TRA XXALSTMBD-CCF1-4 OPA41FW-EXE OPA-OFB-EXE 4
233E-08 INIT-SGR OPA-ODI-EXE SSV-SUCCESS OPA-OD2-EXE 5
1.50E-08 INIT-SLO OPA-ESI-COG OPA-IIPR-COG 6
1.37E-08 INIT-CCW OPA-RCD 2-EXE CCR8-SUCCESSFUL CNUC8F-SUCCESSFL OPA-ECCSTRPI-COG 7
1.08E-08 INIT-SGR OPA-ODI-EXE SSV-FAILS OPA-EC3-COG 8
9.20E-09 INTT-F3C OPA-RCD 2F-COG SWR 8-SUCCESS CNUS8F-SUCCESSFL OPA-ECCSTRP2FC(X) 9 9.00E-09 INIT-SLO OPA-ESI-COG OPA-11PR-EXE 10 8.69E-09 INIT-SGR OPA-SGR-COG OPA-EC3-EXE 11 7.72E-09 INIT-TRA OPA-RCPSEAL-EXE SLA-SUCCESSFUL OPA-RCD 2-EXE AVEG-TV0029-OO hfVEG---IIV0102-CC 12 6.65E-09 INIT-SLO OPA-ESI-EXE OPA-IIPR-COG 13 6.60E-09 INIT41LO OPA-IIPR-COG OPA-OPI-COG I4 6.15E-09 LNIT-LSP OPA-JELSL121-EXE 811R-SUCCESSFUL CNUS-SUCCESSFUL OPA-IIPR-COG 15 5.61E-09 INIT-SGR OPA-MSI-EXE OPA-EC3-COG 16 538E-09 INIT-SWS OPA-RCD 2-EXE SWR 8-SUCCESS CNUS8F-SUCCESSFL OPA-ECCSTRP2-COG 17 4.82E-09 INIT-SWS SWRS-FAILS OPA-lElIVACAB-EXE OPA-ACNN-EXE 18 4.70E-09 INIT-SWS SWR 8-SUCCESS OPA-lEIIVACAB-EXE CNUS8-SUCCESSFUL OPA-l!PIACT-EXE 19 4.40E-09 INIT4fLO OPA-IIPR COG OPA-LPR-COG 20 4.18E-09 INIT4fLO OPA-IIPR-COG OPA-LPR-EXE 21 3.99E-09 INIT-SLO OPA-ESI-EXE OPA-IIPR-EXE 22 3.96E-09 INTT-MLO OPA-IIPR-EXE OPA-OPI-COG 23 3.73E-09 INIT-CCW OPA-RCD 2-COG CCR8-SUCCESSFUL CNUC8F-3UCCESSFL OPA-ECCSTRPI-COG 24 3.69E-09 INIT-LSP OPA-JELSL121-EXE 811R-SUCCESSFUL CNU8-SUCCESSFUL OPA-flPR-EXE 25 3.62E-09 INIT-LSP OPA-JELSL121-EXE OPA-SGOVERFL-COG 2HR-FAILS 26 3.42E-09 INIT-LSP OPA-JELSLOIA-EXE OPA-JELSL21 A-EXE SilR-SUCCESSFUL CNUS-FAILS 27 337E-09 INIT-F3C OPA-RCD 2-EXE SWR 8-SUCCESS CNUS8F-SUCCESSFL OPA-ECCSTRP2FCOG 28 3.29E49 INIT-CCW OPA-RCD 2-EXE CCR8-FAILS OPA-ALT-EXE 29 3.18E-09 INIT-LSP TPAL--PALO2-PR XXAL-MDAFWB-TM OPA-JELSLOI A-EXE OPA-OFB-EXE 30 3.18E-09 INIT-LSP TPAL-PALO2-PR XXAL-MDAFWA-TM OPA-JELSL21A-EXE OPA-OFB-EXE 31 3 04E-09 INIT-CCW OPA-RCD 2-EXE CCR8-SUCCESSFUL CNUC8F-SUCCESSFL OPA-l!PR-COG 32 3.04E-09 INIT-CCW OPA-RCD 2-EXE CCR8-SUCCESSFUL CNUC8F-SUCCESSFL OPA-ECCSTRPI-EXE 33 3.01 E-09 INIT-TRA XXALSTMBD-CCFI-4 OPA-MFW-EXE OPA-HPR-COG 34 2.80E-09 INIT-LSP OPA-JELSL121-EXE 811R-SUCCESSFUL CNU8-SUCCESSFUL OPA-RRIl-EXE 35 8 2.69E-09 INIT-SWS SWR 8-SUCCESS OPA-lElIVACAD-EXE CNUS8-SUCCESSFUL OPA-IIPR-COG 36 2.64E-09 INIT4fLO OPA-HPR-EXE OPA-LPR-COG 37 2.51E-09 INIT-MLO OPA-IIPR-EXE OPA-LPR-EXE 38 2.50E-09 INIT-LSP OPA-JELSL121-EXE 21[R-SUCCESSFUL CNU2-SUCCESSFUL OPA-DCSIIED-EXE 39 2.46E-09 INIT-I'3C OPA-SGOVERFLFCOG SWR 2-SUCCESS CNUS2F-SUCCESSFL OPA-HPRF-COG 40 2.45 E-09 INIT-LSP OPA-JELSLOIA-EXE OPA-JELSL21A-EXE 811R-FAILURE 1211R-SUCCESSFUL CNU12-FAILS 41 2.25E-09 INIT-SLO OPA-ESI-COG OPA-RHR-COG 42 2.llE-09 INIT-TRA OPA-RCPSEAL-EXE SLA-SUCCESSFUL OPA-RCD 2-COG AVEG---TV0029-OO MVEG-HV0102-CC
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Attachment to ET 96-0034 Page 14 of 69 TABLE 3 TOP 100 CUTSETS WITH AT LEAST 2 OPERATOR ACTIONS No Prob.
Cutset Description 43 2.04E-09 INTT-F3C OPA-RCD 2F-COG SWR 8-SUCCESS CNUS8F-SUCCESSFL OPA-IIPRF-COG 44 2.03E-09 INIT-LSP OPA-NE0lNE02-COG OPA-SGK05AB-COG 811R-SUCCESSFUL CNUS-FAILS 45 I.89E-09 INIT-LSP OPA-AFWACT-EXE TPAL-PALO2-PR OPA-SGK05AB-COG 46 1.87E-09 INIT-SWS SWR 8-SUCCESS OPA-!ElIVACAB-EXE OPA-ACNN-EXE CNUS8F-FAILS 47 a.81 E-09 INIT-TRA XXALSTMBIFCCF1-4 OPA-MFW-EXE OPA-IIPR-EXE 48 1.80E-09 INIT-TRA MPPALOlAB-CCF12 TPAL-PALO2-PR OPA-MFW-EXE OPA-OFB-EXE 49 1.77E-09 INIT-SWS OPA-SGOVERFL-COG SWR 2-SUCCESS CNUS2F-SUCCESSFL OPA-ECCSTRP2-COG 50 1.73 E-09 INIT-LSP OPA-NE0lNE02-COG OPA-SGK05AB-EXE OPA-lEHVACAB-EXE 811R-SUCCESSFUL CNU8-FAILS 51 1.68E-09 INIT-F3C SWR 8-SUCCESS CNUS8-SUCCESSFUL OPA-HPRF-COG OPA-lEHVACAB-EXE 52 166E-09 INTT-LSP OPA-JELSLOIA-EXE OPA-JELSL21 A-EXE 8tIR-FAILURE 12flR-FAILS 53 1.64E-09 INTT-CCW OPA-RCD 2-EXE CCR8-FAILS OPA-ALT-COG 54 1.59E-09 INIT-TRA OPA-RCPSEAL-EXE SLA-SUCCESSFUL AVEG-TV0029-OO INAC-NN14-FA OPA-IIPIACT-EXE 55 1.57E-09 INIT-SWS SWR 8-SUCCESS OPA-lEHVACAB-EXE CNUS8-SUCCESSFUL NR-ESWA OPA-PEG 01BCD-EXE 56 1.57E-09 INIT-SWS SWR 8-SUCCESS OPA-lEIIVACAB-EXE CNUS8-SUCCESSFUL NR-ESWB OPA-EGTV0029-EXE I
57 1.57E-09 INIT-SWS SWR 8-SUCCESS OPA-lElIVACAB-EXE CNUS8-SUCCESSFUL NR-ESWB OPA-EGIIV6970-EXE 58 1.57E-09 INIT-SWS SWR 8-SUCCESS OPA-lEIIVACAB-EXE CNUS8-SUCCESSFUL NR-ESWA OPA-EFilV0052-EXE 59 1.50E-09 INIT-SLO OPA-ESI-COG OPA-RIIR-EXE 60 1.47E-09 INIT-SWS OPA-RCD 2-COG SWR 8-SUCCESS CNUS8F-SUCCESSFL OPA-ECCSTRP2-COG 61 1.45E-09 INIT LSP OPA-NE0lNE02-COG OPA-SGK05AB-COG 8tIR-FAILURE 1211R-SUCCESSFUL CNU12-FAILS 62 1.43E-09 INIT-SLO OPA-ESI-COG OPA-BNLT9303-EXE 63 1.40E-09 INH.TAA OPA-RCPSEAL-EXE SLA-SUCCESSFUL AVEG-TV0029-OO hfVEG--IIV0102-CC OPA-HPR-COG 64 138E-09 INIT-Ci W OPA-RCD 2-EXE CCR8-SUCCESSFUL CNUC8F-SUCCESSFL OPA-RRIl-EXE 65 IJ8E-09 INTT-F3C SWR 8-SUCCESS CNUS8-SUCCESSFUL OPA-IIPRF-COG OPA-LPRF-COG 66 136E-09 INTT-LSP OPA-RCPSEAL-EXE SLA-SUCCESSFUL OPA-SGK05AB-COG hEF-ESWA-TM 67 1.35E-09 INIT-TRA XXALSTMBD-CCF1-4 OPA-MFW-EXE OPA-OB-COG 68 l 27E-09 INIT-LSP OPA-RCPSEAL-EXE SLA-SUCCESSFUL OPA-SGK05AB-COG DGNE-NE01-TM 69 1.27E-09 INIT-TRA MPAL-PALOI A-PS TPAL-PALO2-PR XXAL-MDAFWB-TM OPA-MFW-EXE OPA-OFB-EXE 70 1.27E-09 INIT-TRA MPAL-PALOlB-PS TPAL--PALO2-PR XXAL-MDAFWA-TM OPA-MFW-EXE OPA-OFB-EXE 71 1.24E-09 INIT-LSP OPA-NE01NE02-COG OPA-SGK05AB-EXE OPA-lElIVACAB-EXE 8HR-FAILURE 1211R-SUCCESSFUL CNU12-FAILS l
72 1.22E-09 INIT-LSP OPA-RCPSEAL-EXE SLA-SUCCESSFUL OPA-SGK05AB-COG DGNE-NE01-PR 73 1.20E-09 INIT-SWS OPA-RCD 2-EXE SWR 8-SUCCESS CNUS8F-SUCCESSFL OPA-HPR-COG 74 1.16E-09 INIT-LSP OPA-RCPSEAL-EXE SLA-SUCCESSFUL OPA-SGK05AB-EXE OPA-lElIVACAB-EXE XXEF-ESWA-TM 75 I.IIE-09 INIT-F3C OPA-SGOVERFLFCOG SWR 2-SUCCESS CNUS2F-SUCCESSFL OPA-OF2F-COG 76 1.10E-09 INIT-CCW OPA-RCD 2-EXE CCR8-FAILS CNUC8F-SUCCESSFL OPA-ECCSTRPI-COG 77 1.08E-09 thTT-LSP OFA-RCPSEAleEXE SLA-SUCCESSFUL OPA-SGK05AB-EXE OPA-lElIVACAB-EXE DGNE-NTal TM 78 1.0dE-09 INIT-LSP OPA-RCPSEAIeEXE SLA-SUCCESSFUL OPA-SGK05AB-EXE OPA-lEHVACAB-EXE DONE-NE0! PR 79 1.02E-09 INIT-F3A OPA-RCD 2F-COG SWRS-SUCCESS CNUS8F-SUCCESSFL OPA-ECCSTRP2FCOG 80 1.02E-09 INIT-F3B OPA-RCD 2F-COG SWR 8-SUCCESS CNUS8F-SUCCESSFL OPA-ECCSTRP2FCOG 81 1.02E-09 INIT-FLI OPA-SGOVERFLFCOG MPPALCIAB-CCF12 OPA-OFB-EXE 82 LOIE-09 INIT-LSP OPA-SGOVERFL-COG XXAL---MDAFWB-TM DGNE-NE01-PR OPA-OFB-EXE 83 1.01E-09 INIT-LSP OPA-SGOVERFL-COG XXAL-MDAFWA-TM DGNE-NE02-PR OPA-OFB-EXE 84 1.01E-09 INIT-TRA OPA-RCD 2-EXE CCW8R-FAILS OPA-ALT-EXE AVEG-TV0029-OO MVEF-IIV0052-CC
Attachment to ET 96-0034 Page 15 of 69 9
TABLE 3 TOP 100 CUTSETS WITH AT LEAST 2 OPERATOR ACTIONS
'No Pmb.
Cutset Description 85 9.98E-10 INIT-SLO OPA-ESI-EXE OPA-RIIR-COG 86 9.90E-10 INIT-MLO OPA-RilR-COG OPA-OPI-COG 87 9.80E-10 INIT-LSP OPA-NE0lNE02-COG OPA-SGK05AB-COG SIIR-FAILURE 12IIR-FAILS 88 9.06E-10 INIT-LSP OPA-JELSLI21-EXE OPA-DCSIIED-EXE 211R-FAILS 89 9.05E-10 INIT-SLB OPA-SGOVERFL-COG XXAL-MDAFu%TM OPA-OFB-EXE 90 8.97E-10 INIT-CCW OPA-RCD 2-COG CCR8-FAILS OPA-ALT-EXE 91 8.87E-10 INIT-TRA OPA-RCPSEAL-EXE SLA-SUCCESSFUL AVEG---TV0029-OO CASF-LOGICB-TM OPA-IIPIACT-EXE 92 8.58E-10 INIT-LSP OPA-RCPSEAL-EXE SLA-SUCCESSFUL OPA-RCD 2-EXE DGNE-NE01-PR XXEJ-TRAINB-TM 93 8.55E-10 INIT-TRO OPA-SGOVERFL-COG MPPALOI AB-CCF12 OPA-OFB-EXE 94 8.50E-10 INIT-LSP OPA-JELSLOIA-EXE XXEF-ESWB-TM OPA-SGONTRFL-COG 21tR-FAILS 95 8.50E-10 INIT-LSP OPA-JELSL21 A-EXE -
XXEF-ESWA-TM OPA-SGOVERILCOG 211R-FAILS l'
837E-10 INIT-LSP OPA-NE0lNE02-COG OPA-SGK05AB-EXE OPA-lElIVACAB-EXE 811R-FAILURE 1211R-FAILS 97 8.29E-10 INIT-CCW OPA-RCD 2-COG CCR8-SUCCESSFUL CNUC8F-SUCCESSFL OPA-ECCSTRPI-EXE 98 8.29E 10 INIT-CCW OPA-RCD 2-COG CCR8-SUCCESSFUL CNUC8F-SUCCESSFL OPA-IIPR-COG 99 8 04E-10 INIT-LSP OPA-JELSLOIA-EXE OPA-JELSL21A-EXE TPALT---PAIA2-PR 211R-FAILS f
100 7 NE-10 INIT-LSP OPA-JELSL21 A-EXE DGNE-NE01-TM OPA-SGOVERFL-COG 211R-FAILS
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Attachment to ET 96-0034 Page 16 of 69 TABLE 4 CUTSETS CONTAINING MULTIPLE OPERATOR ACTIONS WITH DEPENDENCIFS No Prob.
Cutset Description 1
1.53E-10 INIT-F3A SWR 8-SUCCESS CNUSB-SUCCESSFUL OPA-HPRF-COG OPA-LPRF-COG 2
1.53E-10 INIT-F3B SWR 8-SUCCESS CNUS8-SUCCESSFUL OPA-HPRF-COG OPA-LPRF-COG 3
1.38E-09 INIT-F3C SWR 8-SUCCESS CNUSB-SUCCESSFUL OPA-HPRF-COG OPA-LPRF-COG 4
1.01E-10 INIT-FL1 MVBB--HV8000B-OO OTH-PORVOPENSMFW PVBB-PCV0456A-OO OPA-HPRF-COG OPA-LPRF-COG 5
2.20E-10 INIT-SWS SWR 8-SUCCESS CNUSB-SUCCESSFUL OPA-HPR-COG OPA-LPR-COG 6
6.27E-10 INIT-MLO OPA-RHR-COG OPA-LPR-EXE 7
4.18E-10 INIT-MLO OPA-RHR-EXE OPA-LPR-EXE 8
8.69E-10 INIT-SGR OPA-SGR-COG OPA-EC3-EXE 9
3.30E-10 INIT-SGR OPA-SGR-COG OPA-EC3-COG 10 3.99E-09 INIT-SLO OPA-ES1-EXE OPA-HPR-EXE I
l
Attachm:nt to ET 96-0034 Page 17 of 69 i
Revised Common Cause Analysis WCNOC described the methodology utilized for the Common Cause analysis for the IPE in the response to the NRC's RAI [WM 95-0128]. The Common Cause metho(. ology utilized is described in the response to RAI Question 4.
Included in the response to Question 4 was " Table 1" which provided a list of " Generic" Multiple Greek Letter (MGL) parameters origi.. ally used in the IPE development.
Also provided in the response to Question 4 was " Table 2" which provided the list of" Plant Specific" MGL parameters utilized for final quantification of the IPE. The NRC identified that the " Plant Specific" MGL parameters were significantly less than " Generic" MGL parameters typically utilized in other IPE Submittals. The concem was that utilization of the " plant i
specific" MGL parameters could produce results which might not properly reflect the relative contribution of Common Cause failures to the core damage frequency.
Accordingly, the WCGS Probabilistic Safety Assessment (PSA) model has been requantified utilizing the " Generic" MGL parameters as identified in the response to RAI Question 4. These " Generic" MGL factors were determined using data from EPRI NP-3967," Classification and Analysis of Reactor Operating Experience Involving Dependent Failures," Pickard, Lowe and Garrick, June 1985 and NUREG/CR-4780 " Procedures for Treating Common Cause Failures in Safety and Reliability Studies, Procedural Framework and Examples," Pickard, Lowe and Garrick, January 1989. The " Generic" i
MGL parameters from " Table 1" of the response to RAI Question 4 are provided in Table 5 below. The beta factors from Table 5 (below) are comparable to the generic beta factors provided in Table VI.1-1 of NUREG/CR-4550, " Analysis of Core Damage Frequency From Internal Events: Methodology Guidelines, Volume 1".
TABLES GENERIC MGL PARAMETERS Component kbeta)
C (gamma)
D (delta)
Reactor Trip Breakers 0.160 0.40 0.61 Diesel Generators O C25 0.15 0.25 Motor-Cperated Valves 0.038 0.23 0.69 Safety / Relief Valves 0.094 0.66 0.66 Check Valves 0.060 0.33 0.52 Pun ps liigh fleed 0.106 0.28 0.19 3
i Residuallieat Removal 0.077 0.15 0.43 i
C.gmy
.ay 0.057 0.24 0.52 7
Aux !!"Y feesater 0.021 0.20 0.52 Service 6ater and 0.032
~
O.63 0.84 Co.nponent Cooling Water Chillers 0.110 0.33 0.52 Fans 0.130 0.33 0.52
}
All 0.080 0.33 0.52
- ~
Attachment to ET 96-0034 Page 18 of 69 i
The revised Common Cause event values are presented in Table 6 below. It is important to note that the revised Common Cause values were imported for quantification into a i
PSA model using the NUS Corporation NUPRA PSA software. The PSA model as reflected in the IPE Submittal was developed using the Westinghouse PSA software package. Subsequent to the time of the IPE Submittal, the Wolf Creek PSA core damage (Level I) model was converted to the NUPRA software, i
i A number of changes to the Wolf Creek PSA model were accomplished in concert with conversion to the NUPRA software. Some changes were required to accommodate differences between the Westinghouse and NUPRA software packages. Some changes l
were also made to allow for utilization of desirable features in the NUPRA software
.which were not available under the Westinghouse software. One desirable feature which j
resulted in PSA model changes was the Commca Cause eunt generator. This feature was particularly attractive for common cause groups of three or four components. Based l
on the component failure event value and the appropriate MGL parameters from Table 5 above, events for common cause failure of two, three_ or four components in the t
component group would be automatically generated and appropriately placed at the component level within the fault tree models.
Determination of common cause event values for the PSA model using the Westinghouse i
software was accomplished by separate hand calculation. Placement of these calculated common cause failure events within the faalt trees, for common cause component groups of two components, was generally at the component level. For groups of three or four components, the calculated common cause failure values were usually combined under a
}
separate event placed at the fault tree top logic level. For the majority of the fault tree models which have been converted to the NUPRA software, the automatic common cause j
j event generation feature was utilized for common cause component groups of three or four components. For these fault trees, the common cause failure event located at the top t
logic. level was appropriately deleted. Note (B) to Table 6 identifies common cause failure events, previously located at the fault tree top logic level, which were expanded using the'NUPRA automatic common cause failure event generation feature. The l
expanded common cause failure events are located in the fault tree at the component level.
The NUPRA automatic common cause event generation feature assigns a -CCFXY type suffix to the generated common cause events. For the sake of consistency, the common l
cause failure event identifiers, in the fault trees converted to the NUPRA software, include the -CCFXY type suffix instead of the -CM suffix previously used under the Westinghouse software.
1 i
Incorporation of the revised Common Cause failure event values, with quantification using the WCGS PSA model converted to the NUPRA software, results in an increase of i
approximately 34 % over the 4.2E-05/ year core damage frequency value reported in the IPE Submittal.
l 1
m_..
Attachment to ET 96-0034 Page 19 of 69 Table 6 Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event identifier Description Identifier Common Event identifier Common Cause Value Cause Value AVAB-HV005006-CM 1.40E-05 AVABHV056-CCF12 1.60E-04 Common Cause Failure of AOVS ABHV0005 & ABHV0006 AVAB-AF2PORVS-CM 1.43 E-05 AVPV01234-CCF12 3.57E-05 Common Cause Failure of SG ARVs ABPV0001 & 0002 (B)
AVPV01234-CCF13 3.57E-05 Common Cause Failure of SG ARVs ABPV0001 & 0003 AVPV01234-CCF14 3.57E-05 Common Cause Failure of SG ARVs ABPV0001 & 0004 AVPV01234-CCF23 3.57E-05 Common Cause Failure of SG ARVs ABPV0002 & 0003 AVPVO1234-CCF24 3.57E-05 Common Cause Failure of SG ARVs ABPV0002 & 0004 AVPV01234-CCF34 3.57E-05 Common Cause Failure of SG ARVs ABPV0003 & 0004 AVPV01234-CCF123 8.45E-06 Common Cause Failure of SG ARVs ABPV0001,0002 & 0003 AVPVO1234-CCF124 8.45E-06 Common Cause Failure of SG ARVs ABPV0001,0002 & 0004 AVPV01234-CCF134 8.45E-06 Common Cause Failure of SG ARVs ABPV0001,0003 & 0004 AVPV01234-CCF234 8.45E-06 Common Cause Failure of SG A RVs ABPV0002,0003 & 0004 AVPVO1234-CCF1-4 2.75E-05 Global CC Failure of SG ARVs ABPV0001,0002,0003 & 0004 XXAB-N2-ACC-AF2 7.53E-06 CVA345678-CCF12 134E-05 Common Cause Failure of CVs ABV0345 & ABV0346 l
(B)
CVA345678-CCF13 134E-05 Common Cause Failure of CVs ABV0345 & ABV0347 CVA345678-CCF14 134E-05 Common Cause Failure of CVs ABV0345 & ABV0348 CVA345678-CCF23 134E-05 Common Cause Failure of CVs ABV0346 & ABV0347 CVA345678-CCF24 134E-05 Common Cause Failure of CVs ABV0346 & ABV0348 CVA345678-CCF34 1.34E-05 Common Cause Failure of CVs ABV0347 & ABV0348 CVA345678-CCF123 3.17E-06 Common Cause Failure of CVs ABV0345,0346 & 0347 CVA345678-CCF124 3.17E-06 Common Cause Failure of CVs ABV0345,0346 & 0348 t
CVA345678-CCF134 3.17E-06 Common Cause Failure of CVs ABV0345,0347 & 0348 CVA345678-CCF234 3.17E-06 Common Cause Failure of CVs ABV0346,0347 & 0348 CVA345678-CCF1-4 1.03 E-05 Global CC Failure of CVs ABV0345,0346,0347 & 0348
Attachment to ET 96-0034 Page 20 of 69 Table 6 (Continued)
Revised Common Cause Value-IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event identifier Description Identifier Common Event identifier Common Cause Value Cause Value XXAB-N2-ACC-AF2 7.53E-06 CVA495012-CCF12 134E-06 Common Cause Failure of CVs ABV0349 & ABV0350
, B)
CVA495012-CCF13 134E-06 Common Cause Failure of CVs ABV0349 & ABV0351
(
CVA495012-CCF14 134E-06 Common Cause Failure of CVs ABV0349 & ABV0352 CVA495012-CCF23 134E-06 Common Cause Failure of CVs ABV0350 & ABV0351 CVA495012-CCF24 134E-06 Common Cause Failure of CVs ABV0350 & ABV0352 CVA495012-CCF34 134E-06 Common Cause Failure of CVs ABV0351 & ABV0352 CVA495012-CCF123 3.16E-07 Common Cause Failure of CVs ABV0349,0350 & 0351 CVA495012-CCF124 3.16E-07 Common Cause Failure of CVs ABV0349,0350 & 0352 CVA495012-CCF134 3.16E-07 Common Cause Failure of CVs ABV0349,0351 & 0352 CVA495012-CCF234 3.16E-07 Common Cause Failure of CVs ABV0350,0351 & 0352 CVA495012-CCF1-4 1.03E-06 Global CC Failure of CVs ABV0349,0350,0351 & 0352 XXAB-N2-ACC-AF2 7.53E-06 RVV703456-CCF12 1.67E-06 Common Cause Failure of Relief Vivs KAV0703 & KAV0704 (B)
RVV703456-CCF13 1.67E-06 Common Cause Failure of Relief Vivs KAV0703 & KAV0705 RVV703456-CCF14 1.67E-06 Common Cause Failure of Relief Vlvs KAV0703 & KAV0706 RVV703456-CCF23 1.67E-06 Common Cause Failure of Relief Vivs KAV0704 & KAV0705 RVV703456-CCF24 1.67E-06 Common Cause Failure of Relief Vivs KAV0704 & KAV0706 RVV703456-CCF34 1.67E-06 Common Cause Failure of Relief Vivs KAV0705 & KAV0706 RVV703456-CCF123 3.95E-07 Common Cause Failure of Relief Vivs KAV0703,0704 & 0705 RVV703456-CCF124 3.95E-07 Common Cause Failure of Relief Vivs KAV0703,0704 & 0706 RVV703456-CCF134 3.95E-07 Common Cause Failure of Relief Vivs KAV0703,0705 & 0706 RVV703456-CCF234 3.95E-07 Common Cause Failure of Relief Vivs KAV0704,0705 & 0706 RVV703456-CCF1-4 1.28E-06 Global CC Failure of Relief Vivs KAV0703,0704,0705 & 0706
Attachment to ET 96-0034 Page 21 of 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event Identifier Description Identifier Common Event Identifier Common Cause Value Cause Value XXAB-N2-ACC-AF2 7.53E-06 RVV710123-CCF12 1.67E-06 Common Cause Failure of Relief Vivs KAV0710 & KAV0711 (B)
RVV710123-CCF13 1.67E-06 Common Cause Failure of Relief Vivs KAV0710 & KAV0712 RVV710123-CCF14 1.67E-06 Common Cause Failure of Relief Vivs KAV3710 & KAV0713 RVV710123-CCF23 1.67E-06 Common Cause Failure of Relief Vivs KAV0711 & KAV0712 RVV710123-CCF24 1.67E-06 Common Cause Failure of Relief Vivs KAV0711 & KAV0713 RVV710123-CCF34 1.67E-06 Common Cause Failure of Relief Vivs KAV0712 & KAV0713 RVV710123-CCF123 3.95E-07 Common Cause Failure of Relief Vivs KAV0710,0711 & 0712 RVV710123-CCF124 3.95E-07 Common Cause Failure of Relief Vivs KAV0710,0711 & 0713 RVV710123-CCFI34 3.95E-07 Common Cause Failure of Relief Vivs KAV0710,0712 & 0713 RVV710123-CCF234 3.95E-07 Common Cause Failure of Relief Vivs KAV0711,0712 & 0713 RVV710123-CCF1-4 1.28E-06 Global CC Failure of Relief Vivs KAV0710,0711,0712 & 0713 i
HVAB-11141720-CM 4.35E-05 HVOI14720-CCF12 3.57E-05 Common Cause Failure (FTO) of MSIVs ABHV0011 & 0014 (B)
IIVOI14720 CCF13 3.57E-05 Common Cause Failure (FTO) of MSIVs ABHV0011 & 0017 HVOI14720-CCF14 3.57E-05 Common Cause Failure (FTO) of MSIVs ABHV0011 & 0020 HVOI14720-CCF23 3.57E-05 Common Cause Failure (FTO) of MSIVs ABHV0014 & 0017 HVOI 14720-CCF24 3.57E-05 Common Cause Failure (FTO) of MSIVs ABHV0014 & 0020 HVOI14720-CCF34 3.57E-05 Common Cause Failure (FTO) of MSiVs ABHV0017 & 0020 HVOI14720-CCF123 8.45E-06 Common Cause Failure (FTO) of MSIVs ABHV0011,0014 & 0017 HVOI14720-CCF124 8.45E-06 Common Cause Failure (FTO) of MSIVs ABHV0011,0014 & 0020 HVOI14720-CCF134 8.45E-06 Common Cause Failure (FTO) of MSIVs ABHV0011,0017 & 0020 HVOll4720-CCF234 8.45E-06 Common Cause Failure (FTO) of MSIVs ABHV0014,0017 & 0020 HVOI 14720-CCF1-4 2.75E-05 Global CC Failure (FTO) of MSIVs ABHV0011,0014,0017 & 0020
Attachment M ET 96-0034 Page 22 of 69 Table 6 (Continued)
Revised Common Cause Valun IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event identifier Description Identifier Common Event Identifier Common Cause Value Cause Value HVAB-1 Il41720-CM 435E-05 SVMSVBACT-CCF12 3.57E-05 CC Failure of MSIV Active SOVs (B) for ABHV00ll & 0014 (B)
SVMSVBACT-CCF13 3.57E-05 CC Failure of MSIV Active SOVs (B) for ABHV0011 & 0017 SVMSVBACT-CCFl4 3.57E-05 CC Failure of MSIV Active SOVs (B) for ABHV00ll & 0020 SVMSVBACT-CCF23 3.57E-05 CC Failure of MSIV Active SOVs (B) for ABHV0014 & 0017 SVMSVBACT-CCF24 3.57E-05 CC Failure of MSIV Active SOVs (B) for ABHV0014 & 0020 SVMSVBACT-CCF34 3.57E-05 CC Failure of MSIV Active SOVs (B) for ABHV0017 & 0020 SVMSVBACT-CCF123 8.45E-06 CC Failure of MSIV Active SOVs (B) for ABHV0011,0014 & 0017 SVMSVBACT-CCF124 8.45E-06 CC Failure of MSIV Active SOVs (B) for ABHV00ll. 0014 & 0020 SVMSVBACT-CCF134 8.45E-06 CC Failure of MSIV Active SOVs (B) for ABHV00ll,0017 & 0020 SVMSVBACT-CCF234 8.45E-06 CC Failure of MSIV Active SOVs (B) for ABHV0014,0017 & 0020 SVMSVBACT-CCFI-4 2.75E-05 Global CCF of MSIV Active SOVs (B) for ABHVil, 14,17 & 20 HVAB-1 Il41720-CM 435E-05 SVMSVBSDB-CCF12 3.57E-05 CC Failure of MSIV Standby SOVs (B) for ABHV00ll & 0014 (B)
SVMSVBSDB-CCF13 3.57E-05 CC Failure of MSIV Standby SOVs (B) for ABHV0011 & 0017 SVMSVBSDB-CCF14 3.57E-05 CC Failure of MSIV Standby SOVs (B) for ABHV00ll & 0020 SVMSVBSDB-CCF23 3.57E-05 CC Failure of MSIV Standby SOVs (B) for ABHV0014 & 0017 SVMSVBSDB-CCF24 3.57E-05 CC Failure of MSIV Standby SOVs (B) for ABHV0014 & 0020 SVMSVBSDB-CCF34 3.57E-05 CC Failure of MSIV Standby SOVs (B) for ABHV0017 & 0020 SVMSVBSDB-CCF123 8.45E-06 CC Failure of MSIV Standby SOVs (B) for ABHV0ll,014 & 017 SVMSVBSDB-CCF124 8.45E-06 CC Failure of MSIV Standby SOVs (B) for ABHV011,014 & 020 SVMSVBSDB-CCF134 8.45E-06 CC Failure of MSIV Standby SOVs (B) for ABHV01 I,017 & 020 SVMSVBSDB-CCF234 8.45E-06 CC Failure of MSIV Standby SOVs (B) for ABHV014,017 & 020 SVMSVBSDB-CCF1-4 2.75 E-05 Global CCF of MSIV Standby SOVs (B) for ABHVil, 14, 17 & 20
Attachment to ET 96-0034 Page 23 of 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event identifier Description i
Ider ier Common Event Identifier Common Cause Value Cause Value XXAB MS2-CM 4.24E-05 HVCl14720-CCF12 3.57E-05 Common Cause Failure (FTC) of MSIVs ABHV0011 & 0014 (B)
HVCl14720-CCFI3 3.57E-05 Common Cause Failure (FTC) of MSIVs ABHV0011 & 0017 HVCl14720-CCF14 3.57E-05 Common Cause Failure (FTC) of MSIVs ABHV0011 & 0020 HVCl14720-CCF23 3.57E-05 Common Cause Failure (FTC) of MSIVs ABIIV0014 & 0017 HVCI14720-CCF24 3.57E-05 Common Cause Failure (FTC) of MSIVs ABHV0014 & 0020 HVCl14720-CCF34 3.57E-05 Common Cause Failure (FTC) of MSIVs ABHV0017 & 0020 HVCl14720-CCF123 8.45E-06 Common Cause Failure (FTC) of MSIVs ABHV0011,0014 & 0017 HVC114720-CCF124 8.45E-06 Common Cause Failure (FTC) of MSIVs ABHV0011,0014 & 0020 HVCl14720-CCF134 8.45E-06 Common Cause Failure (FTC) of MSIVs ABHV0011,0017 & 0020 HVCl14720-CCF234 8.45E-06 Common Cause Failure (FTC) of MSIVs ABHV0014,0017 & 0020 HVCl 14720-CCF1-4 2.75E-05 Global CC Failure (FTC) of MSIVs ABHV0011,0014,0017 & 0020 XXAB MS2-CM 4.24 E-05 SVMSVAACT-CCF12 3.57E CC Failure of MSIV Active SOVs (A) for ABHV00ll & 0014 (B)
SVMSVAACT-CCF13 3.57E-05 CC Failure of MSIV Active SOVs (A) for ABHV00ll & 0017 SVMSVAACT-CCF14 3.57E-05 CC Failure of MSIV Active SOVs (A) for ABHV0011 & 0020 SVMSVAACT-CCF23 3.57E-05 CC Failure of MSIV Active SOVs (A) for ABHV0014 & 0017 SVMSVAACT-CCF24 3.57E-05 CC Failure of MSIV Active SOVs (A) for ABHV0014 & 0020 SVMSVAACF-CCF34 3.57E-05 CC Failure of MSIV Active SOVs (A) for ABHV0017 & 0020 SVMSVAACT-CCF123 8.45 E-06 CC Failure of MSIV Acti'.e SOVs (A) for ABHV0011,0014 & 0017 SVMSVAACT-CCF124 8.45E-06 CC Failure of MSIV Active SOVs (A) for ABHV0011,0014 & 0020 SVMSVAACT-CCF134 8.45E-06 CC Failure of MSIV Active SOVs (A) for ABHV0011,0017 & 0020 SVMSVAACT-CCF234 8.45E-06 CC Failure of MSIV Active SOVs (A) for ABHV0014,0017 & 0020 SVMSVAACT-CCF1-4 2.75E-05 Global CCF of MSIV Active SOVs (A) for ABHVI L I4,17 & 20
m Attachment to ET 96-0034 Page 24 of 69 Table 6 (Continued)
Revised Connoon Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event Identifier Description Identifier Common Event Identifier Common Cause Value Cause Value XXAB MS2-CM 4.24E-05 SVMSVASDB-CCF12 3.57E-05 CC Failure of MSIV Standby SOVs (A) for ABHV00ll & 0014 (B)
SVMSVASDB-CCF13 3.57E-05 CC Failure of MSIV Standby SOVs (A) for ABHV00ll & 0017 SVMSVASDB-CCF14 3.57E-05 CC Failure of MSIV Standby SOVs (A) for ABHV0011 & 0020 SVMSVASDB-CCF23 3.57E-05 CC Failure of MSIV Standby SOVs (A) for ABHV0014 & 0017 SVMSVASDB-CCF24 3.57E-05 CC Failure of MSIV Standby SOVs (A) for ABHV0014 & 0020 SVMSVASDB-CCF34 3.57E-05 CC Failure of MSIV Standby SOVs (A) for ABHV0017 & 0020 SVMSVASDB-CCF123 8.45E-06 CC Failure of MSIV Standby SOVs (A) for ABHV00ll,0014 & 017 SVMSVASDB-CCF124 8.45E-06 CC Failure of MSIV Standby SOVs (A) for ABHV00ll. 0014 & 020 SVMSVASDB-CCF134 8.45E-06 CC Failure of MSIV Standby SOVs (A) for ABHV00ll. 0017 & 020 SVMSVASDB-CCF234 8.45E-06 CC Failure of MSIV Standby SOVs (A) for ABHV0014. 0017 & 020 SVMSVASDB-CCF1-4 2.75E-05 Global CCF of MSIV Standby SOVs (A) for ABHVll, 14,17 & 20 PVAB-SRVA2-5-CM 1.80E-07 PVSRVA2-5-CCF25 1.07E-06 Common Cause Failure of 2 out of 5 Main Steam Safety Vivs - SG A PVAB-SRVA4-5-CM 3.20E-08 PVSRVA4-5-CCF45 4.09E-07 Common Cause Failure of 4 out of 5 Main Steam Safety Vivs - SG A PVAB-SRVB2-5-CM 1.80E-07 PVSRVB2-5-CCF25 1.07E-06 Common Cause Failure of 2 out of 5 Main Steam Safety Vivs - SG B PVAB-SRVB4-5-CM 3.20E-08 PVSRVB4-5-CCF45 4.09E-07 Common Cause Failure of 4 out of 5 Main Steam Safety Vivs - SG B PVAB-SRVC2-5-CM 1.80E-07 PVSRVC2-5-CCF25 1.07E-06 Common Cause Failure of 2 out of 5 Main Steam Safety Vivs - SG C PVAB-SRVC4-5-CM 3.20E-08 PVSRVC4-5-CCF45 4.09E-07 Common Cause Failure of 4 out of 5 Main Steam Safety Vivs - SG C PVAB-SRVD2-5-CM 1.80E-07 PVSRVD2-5-CCF25 1.07E-06 Common Cause Failure of 2 out of 5 Main Steam Safety Vivs - SG D PVAB-SRVD4-5-CM 3.20E-08 PVSRVD4-5-CCF45 4.09E-07 Common Cause Failure of 4 out of 5 Main Steam Safety Vivs - SG D AVAD-LV79BABB-CM 1.40E-05 AVAD79ABB-CCF12 1.60E-04 Common Cause Failure of AOVs ADLV0079BA & ADLV0079BB XXAD-CONDSSYS-CM I.87E-05 XXAD-COND-CCF12 7.74E-05 Common Cause Failures of the Condensate System
?
Attachment to ET 96-0034 Page 25 of 69 Table 6 (Continued)
Revised Common Cause Valugs IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event identifier Description Identifier Common Event Identifier Common Cause Value Cause Value XXAL AF2-CM 1.09E-06 CVA124567-CCF12 134E-06 Common Cause Failure of CVs AEV0124 & AEV0125 (B)
CVAl24567-CCF13 134E-06 Common Cause Failure of CVs AEV0124 & AEV0126 CVAl24567-CCF14 134E-06 Common Cause Failure of CVs AEV0124 & AEV0127 CVAl24567-CCF23 134E-06 Common Cause Failure of CVs AEV0125 & AEV0126 CVAl24567-CCF24 134E-06 Common Cause Failure of CVs AEV0125 & AEV0127 CVAl24567-CCF34 134E-06 Common Cause Failure of CVs AEV0126 & AEV0127 CVAl24567-CCF123 3.16E-07 Common Cause Failure of CVs AEV0124,0125 & 0126 CVAl24567-CCF124 3.16E-07 Common Cause Failure of CVs AEV0124,0125 & 0127 CVA124567-CCF134 3.16E-07 Common Cause Failure of CVs AEV0124,0126 & 0127 CVA124567-CCF234 3.16E-07 Common Cause Failure of CVs AEV0125,0126 & 0127 CVAl24567-CCF1-4 1.03E-06 Global CC Failure of CVs AEV0124,0125,0126 & 0127 MVAE-flV017018-CM 9.12E-09 MV11V01718-CCF12 9.12E-08 Common Cause Failure of MOVs AElIV0017 & AEllV0018 MVAE-flV033034-CM 9.12E-09 MVifV03334-CCF12 9.12E-08 Common Cause Failure of MOVs AEHV0033 & AEllV0034 XXAE MF1-CM 4.40E-05 XXAE-MF1-CCF12 1.91E-04 Common Cause Failure of the Main Feedwater System XXAL AFT-CM 1.44E-06 AVAL68102-CCF12 6.43E-08 Common Cause Failure of AOVs ALilV0006 & ALIIV0008 (B)
AVAL68102-CCF13 6.43E-08 Common Cause Failure of AOVs ALilV0006 & ALilV0010 AVAL68102-CCF14 6.43 E-08 Common Cause Failure of AOVs ALilV0006 & ALilV0012 AVAL68102-CCF23 6.43E-03 Common Cause Failure of AOVs ALilV0008 & ALilV0010 AVAL68102-CCF24 6.43 E-08 Common Cause Failure of AOVs ALilV0008 & ALilV0012 AVAL68102-CCF34 6.43E-08 Common Cause Failure of AOVs ALilV0010 & ALIIV0012 AVAL68102-CCF123 1.52E-08 Common Cause Failure of AOVs ALilV0006,0008 & 0010 AVAL68102-CCF124 1.52E-08 Common Cause Failure of AOVs ALIIV0006,0008 & 0012 AVAL68102-CCF134 1.52E-08 Common Cause Failure of AOVs ALHV0006,0010 & 0012 AVAL68102-CCF234 1.52E-08 Common Cause Failure of AOVs ALilV0008,0010 & 0012 AVAL68102-CCF1-4 4.94E-08 Global CC Failure of AOVs ALIIV0006,0008,0010 & 0012 l
.~
~
Attachment to ET 96-0034 Page 26 of 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event Identifier Description Identifier Common Event Identifier Common Cause Value Cause Value CVAL-V0001002-CM 2.10E-07 CVA010203-CCF12 2.01 E-06 Common Cause Failure (FTO) of CVs ALV0001 & 0002 CVAL-V0001003-CM 2.10E-07 CVA010203-CCF13 2.01 E-06 Common Cause Failure (FTO) of CVs ALV0001 & 0003 CVAL-V0002003-CM 2.10E-07 CVA010203-CCF23 2.01E-06 Common Cause Failure (FTO) of CVs ALV0002 & 0003 CVA010203-CCF123 1.98E-06 Global CC Failure (FTO) of CVs ALV0001,0002 & 0003 (A)
CVOO10203-CCF12 2.01 E-05 Common Cause Failure (FFRC) of CVs ALV0001 & 0002 CVOO10203-CCF13 2.01 E-05 Common Cause Failure (FTRC) of CVs ALV0001 & 0003 CVOO10203-CCF23 2.01E-05 Common Cause Failure (FTRC) of CVs ALV0002 & 0003 CVOO10203-CCF123 1.98E-05 Global CC Failure (FTRC) of CVs ALV0001,0002 & 0003 (A)
CVA691215-CCF12 1.34E-06 Common Cause Failure of CVs ALV0006 & ALV0009 CVA691215-CCF13 1.34E-06 Common Cause Failure of CVs ALV0006 & ALV0012 CVA691215-CCF14 1.34E-06 Common Cause Failure of CVs ALV0006 & ALV0015 CVA691215-CCF23 1.34E-06 Common Cause Failure of CVs ALV0009 & ALV0012 CVA691215-CCF24 1.34E-06 Common Cause Failure of CVs ALV0009 & ALV0015 CVA691215-CCF34 1.34E-06 Common Cause Failure of CVs ALV0012 & ALV0015 CVA691215-CCF123 3.17E-07 Common Cause Failure of CVs ALV0006,0009 & 0012 CVA691215-CCF124 3.17E-07 Common Cause Failure of CVs ALV0006,0009 & 0015 CVA691215-CCF134 3.17E-07 Common Cause Failure of CVs ALV0006,0012 & 0015 CVA691215-CCF234 3.17E-07 Common Cause Failure of CVs ALV0009,0012 & 0015 CVA691215-CCF1-4 1.03E-06 Global CC Failure of CVs ALV0006,0009,0012 & 0015 CVAL-V0030042-CM 2.10E-07 CVA304254-CCF12 2.01E-06 Common Cause Failure (FTO) of CVs ALV0030 & 0042 CVAL-V0030054-CM 2.10E-07 CVA304254-CCF13 2.01E-06 Common Cause Failure (FTO) of CVs ALV0030 & 0054 CVAL-V0042054-CM 2.10E-07 CVA304254-CCF23 2.01E-06 Common Cause Failure (FTO) of CVs ALV0042 & 0054 CVA304254-CCF123 1.98E-06 Global CC Failure (FFO) of CVs ALV0030,0042 & 0054 i
Attachment to ET 96-0034 Page 27 02 69 Table 6 (Continued)
Revised common cause values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event identilier Description Identifier Common Event Identifier Common Cause Value Cause Value XXAL AF2-CM 1.09E-06 CVA336458-CCF12 1.34E-06 Common Cause Failure of CVs ALV0033 & ALV0036 (B)
CVA336458-CCF13 134E-06 Common Cause Failure of CVs ALV0033 & ALV0045 CVA336458-CCF14 134E-06 Common Cause Failure of CVs ALV0033 & ALV0048 CVA336458-CCF23 134E-06 Common Cause Failure of CVs ALV0036 & ALV0045 CVA336458-CCF24 134E-06 Common Cause Failure of CVs ALV0036 & ALN0048 CVA336458-CCF34 134E-06 Common Cause Failure of CVs ALV9045 & ALV0048 CVA336458-CCF123 3.16E-07 Common Cause Failure of CVs ALV0033,0036 & 0045 CVA336458-CCF124 3.16E-07 Common Cause Failure of CVs ALV0033,0036 & 0048 CVA336458-CCF134 3.16E-07 Common Cause Failure of CVs ALV0033,0045 & 0048 CVA336458-CCF234 3.16E-07 Common Cause Failure of CVs ALV0036,0045 & 0048 CVA336458-CCF1-4 1.03E-06 Global CC Failure of CVs ALV0033,0036,0045 & 0048 XXAL AF2-CM l.09E-06 CVA576272-CCF12 134E-06 Common Cause Failure of CVs ALV0057 & ALV0062 (B)
CVA576272-CCF13 134E-06 Common Cause Failure of CVs ALV0057 & ALV0067 CVA576272-CCF14 134E-06 Common Cause Failure of CVs ALV0057 & ALV0072 CVA576272-CCF23 134E-06 Common Cause Failure of CVs ALV0062 & ALV0067 CVA576272-CCF24 134E-06 Common Cause Failure of CVs ALV0062 & ALV0072 CVA576272-CCF34 134E-06 Common Cause Failure of CVs ALV0067 & ALV0072 CVA576272-CCF123 3.16E-07 Common Cause Failure of CVs ALV0057,0062 & 0067 CVA576272-CCF124 3.16E-07 Common Cause Failure of CVs ALV0057,0062 & 0072 CVA576272-CCF134 3.16E-07 Common Cause Failure of CVs ALV0057,0067 & 0072 CVA576272-CCF234 3.16E-07 Common Cause Failure of CVs ALV0062,0067 & 0072 CVA576272-CCF1-4 1.03E-06 Global CC Failure of CVs ALV0057,0062,0067 & 0072 MPAL-PALOI AB-CM 3.63E-05 MPPALOIAB-CCF12 5.07E-05 Common Cause Failure of MDAFW Pumps PALO1 A & B
l Attachment to ET 96-0034 Paga 28 of 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised l
Common Cause Event identifier Description identifier Common Event Identifier Comme Cause Value Cause Value XXAL AF2-CM 1.09E-06 MVAL57911-CCF12 1.10E-06 Common Cause Failure of MOVs ALHV0005 & ALHV0007 (B)
MVAL57911-CCF13 1.10E-06 Common Cause Failure of MOVs ALHV0005 & ALHV0009 MVAL57911-CCFI4 1.10E-06 Common Cause Failure of MOVs ALHV0005 & ALHV001I MVAL57911-CCF23 1.10E-06 Common Cause Failure of MOVs ALilV0007 & ALHV0009 MVAL57911-CCF24 1.10E-06 Common Cause Failure of MOVs ALHV0007 & AlliV0011 MVAL57911-CCF34 1.10E-06 Common Cause Failure of MOVs ALHV0009 & ALHV0011 MVAL57911-CCF123 1.02E-07 Common Cause Failure of MOVs ALHV0005,0007 & 0009 MVAL57911-CCF124 1.02E-07 Common Cause Failure of MOVs ALHV0005,0007 & 0011 MVAL57911-CCF134 1.02E-07 Common Cause Failure of MOVs ALHV0005,0009 & 0011 MVAL57911-CCF234 1.02E-07 Common Cause Failure of MOVs ALHV0007,0009 & 0011 MVAL57911-CCF1-4 6.81 E-07 Global CC Failure of MOVs ALHV0005,0007,0009 & 0011 (A)
MVAL30123-CCF12 3.62E-05 Common Cause Failure of MOVs ALHV0030 & ALHV0031 MVAL30123-CCF13 3.62E-05 Common Cause Failure of MOVs ALHV0030 & ALHV0032 MVAL30123-CCF14 3.62E-05 Common Cause Failure of MOVs ALHV0030 & ALHV0033 MVAL30123-CCF23 3.62E-05 Common Cause Failure of MOVs ALHV0031 & ALHV0032 MVAL30123-CCF24 3.62E-05 Common Cause Failure of MOVs ALHV0031 & ALHV0033 MVAL30123-CCF34 3.62E-05 Common Cause Failure of MOVs ALHV0032 & ALHV0033 MVAL30123-CCF123 3.35E-06 Common Cause Failure of MOVs ALHV0030,0031 & 0032 MVAL30123-CCF124 3.35E-06 Common Cause Failure of MOVs ALHV0030,0031 & 0033 MVAL30123-CCF134 3.35E-06 Common Cause Failure of MOVs ALHV0030,0032 & 0033 MVAL30123-CCF234 3.35E-06 Common Cause Failure of MOVs ALHV0031,0032 & 0033 MVAL30123-CCF1-4 2.24 E-05 Global CC Failure of MOVs ALHV0030,0031,0032 & 0033 MVAL-HV034035-CM 8.76E-09 MVAL34356-CCF12 5.27E-08 Common Cause Failure (FTRO) of MOVs ALHV0034 & 0035 MVAL-HV034036-CM 8.76E-09 MVAL34356-CCF13 5.27E-08 Common Cause Failure (FTRO) of MOVs ALHV0034 & 0036 MVAL-HV035036-CM 8.76E-09 MVAL34356-CCF23 5.27E-08 Common Cause Failure (FTRO) of MOVs ALHV0035 & 0036 MVAL34356-CCF123 3.15E-08 Global CC Failure (FTRO) of MOVs ALHV0034,0035 & 0036 t
e
i l
Attachment to ET 96-0034 Page 29 of 69 1
Table 6 (Continued)
Revised Common Cause WIues j
t IPE Submitta! Event IPE Submittal Current WCGS PSA Revised Common Cause Evej t identifier Description Identifier Common Event identifier Common
/
['
Cause Value Cause Value (A)
MVAO34356-CCF12 5.43E-05 Common Cause Failure (FTC)/#f MOVs ALHV0034 & 0035 MVA034356-CCF13 5.43E-05 Common Cause Failure (FTC/of MOVs ALHV0034 & 0036 MVAO34356-CCF23 5.43E-05 Common Cause Failure (FTC/ of MOVs ALHV0035 & 0036 MVAO34356-CCF123 3.24E-05 Global CC Failure (FTC) of[40Vs ALHV0034,0035 & 0036 CVBB-8948ABCD-CM 1.40E-06 CVB8948AD-CCF12 134E-06 Common Cause Failure of f[Vs BB8948A & BB8948B (B)
CVB8948AD-CCF13 134E-06 Common Cause Failure of /;Vs BB8948A & BB8948C CVB8948AD-CCF14 134E-06 Common Cause Failure of/CVs BB8948A & BB8948D CVB8948AD-CCF23 1.34E-06 Common Cause Failure of CVs BB8948B & BB8948C CVB8948AD-CCF24 134E-06 Common Cause Failure </lCVs BB8948B & BB8948D Common Cause Failure [,f CVs BB8948C & BB8948D CVB8948AD-CCF34 134E-06 CVB8948AD-CCF123 3.17E-07 Common Cause Failuntof CVs BB8948A, B & C Common Cause Failur[ of CVs BB8948A, B & D CVB8948AD-CCF124 3.17E-07 CVB8948AD-CCF134 3.17E-07 Common Cause Failuf: of CVs BB8948A, C & D CVB8948AD-CCF234 3.17E-07 Common Cause Failr/x of CVs BB89488, C & D CVB8948AD-CCF1-4 1.03E-06 Global CC Failure o!CVs BB8948A, B, C & D Common Cause Fafare of CVs BBV0001 & BBV0022 CVBB-V1224059-CM 1.40E-06 CVB122459-CCF12 134E-06 (B)
CVB122459-CCF13 134E-06 Common Cause Fr/fure of CVs BBV0001 & BBV0040 CVB122459-CCF14 134E-06 Common Cause F/ilure of CVs BBV0001 & BBV0059 CVB122459-CCF23 134E-06 Common Cause Igiture of CVs BBV0022 & BBV0040 CVB122459-CCF24 134E-06 Common Cause / ailure of CVs uBV0022 & BBV0059 CVB122459-CCF34 134E-06 Common Caust[ Failure of CVs etBV0040 & BBV0059 CVB122459-CCF123 3.17E-07 Common Caus/ Failure of CVs BBV0001,0022 & 0040 Common Cauf: Failure of CVs BBV0001,0022 & 0059 CVB122459-CCF124 3.17E-07 CVB122459-CCF134 3.17E-07 Common Caif e Failure of CVs BBV0001,0040 & 0059 CVB122459-CCF234 3.17E-07 Common Ce/.se Failure of CVs BBV0022,0040 & 0059 CVB122459-CCF1-4 1.03E-06 Global CC $lailure of CVs BBV0001,0022,0040 & 0059
/
A
Attachment to ET 96-0034 Page 30 of 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event identifier Description Identifier Common Event identifier Common Cause Value Cause Value PVBB-
"PRC-CM 1.26E-07 PV8010ABC-CCF12 1.60E-07 Common Cause Failure of Press Safety Vivs BBPV8010A & B (B)
PV8010ABC-CCF13 1.60E-07 Common Cause Failure of Press Safety Vivs BBPV8010A & C PV8010ABC-CCF23 1.60E-07 Common Cause Failure of Press Safety Vivs BBPV8010B & C PV8010ABC-CCF123 6.20E-07 Global CC Failure of Press Safety Valves BBPV8010A, B & C SVBB-PCV4556A-CM 1.40E-05 SVBB4556A-CCF12 1.60E-04 Common Cause Failure of Press PORVs BBPCV0455A & 0456A CVBG-8481 AB-CM 2.90E-07 CV-8481 AB-CCF12 6.00E-06 Common Cause Failure of CVs BG8481 A & BG8481B CVBG-8546AB-CM 2.90E-07 CV-8546AB-CCF12 6.00E-06 Common Cause Failure (FTO) of CVs BG85346A & BG8546B CVBGR-8546AB-CM 2.90E-06 CVC8546AB-CCF12 6.00E-05 Common Cause Failure (FTC) of CVs BG8546A & BG8546B CVBG-V0147165-CM 2.90E-07 CVV147165-CCF12 6.00E-06 Common Cause Failure of CVs BGV0147 & BGV0165 (A)
CV-V58990-CCF12 6.00E-06 Common Cause Failure of CVs BGV0589 & BGV0590 MPBG-PBG02AB-CM 5.58E-05 MPPBG02AB-CCF12 2.98E-04 Common Cause Failure of BAT Pumps PBG02A & B MPBG-PBG05AB-CM 5.70E-05 MPPBG05AB-CCF12 1.78E-04 Common Cause Failure of Centrif Charging Pumps PBG05A & B MVBG-HV810506-CM 1.41E-05 MVBG81056-CCF12 1.41 E-04 Common Cause Failure (FTC) of MOVs BGHV8105 & 8106 MVBGSDHV81056-CM 1.41E-05 MVHV81056-CCF12 1.41E-04 Common Cause Failure (FTO) of MOVs BGHV8105 & 8106 MVBGI-HV81101-CM 1.41E-05 MVBG81101-CCF12 1.41E-04 Common Cause Failure of MOVs BGHV8110 & 811I MVBGILCVI12BC-CM l.41E-05 MVBG112BC-CCF12 1.41 E-04 Common Cause Failure of MOVs BGLCV0112B & C (A)
SVB8357AB-CCFI2 1.60E-04 Common Cause Failure of SOVs BGHV8357A & B (A)
SVBM03ABC-CCF12 536E-05 Common Cause Failure of SOVs BMHY0003A & B SVBM03ABC-CCF13 5.36E-05 Common Cause Failure of SOVs BMHY0003A & C SVBM03ABC-CCF23 5.36E-05 Common Cause Failure of SOVs BMHY0003B & C SVBM03ABC-CCF123 5.28E-05 Global CC Failure of SOVs BMHY0003A, B & C MVBNRHV8806AB-CM l.41 E-05 MVC8806AB-CCF12 1.41E-04 Common Cause Failure (FTC) of MOVs BNHV8806A & B MVBNIHV8806AB-CM 4.75E-09 MV-8806AB-CCF12 4.75E-08 Common Cause Failure (FTRO) of MOVs BNHV8806A & B MVBN-HV8812AB-CM l.41E-05 MVB8812AB-CCF12 1.41 E-04 Common Cause Failure (FTC) of MOVs BNHV8812A & B MVBNIHV8812AB-CM 4.75E-09 MV-8812AB-CCF12 4.75E-08 Common Cause Failure (FTRO) of MOVs BNHV8812A & B MVBNILCVil2DE-CM 1.41E-05 MVBNil2DE-CCF12 1.41E-04 Common Cause Failure (FTO) of MOVs BNLCVoll2D & E I
4
Attachment to ET 96-0034 Page 31 of 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event identifier Description Identifier Common Event Identifier Common Cause Value Cause Value MVBNRLCVi12DE-CM 1.41 E-05 MVC-112DE-CCF12 1.41E-04 Common Cause Failure (FTC) of MOVs BNLCVO112D & E CVEF-V0001004-CM 2.90E-07 CVEF-V14-CCCF12 6.00E-06 Common Cause Failure of CVs EFV0001 & EFV0004 FLEF-FEF01 AB-CM 1.13 E-05 FLFEF01AB-CCF12 1.30E-04 Common Cause Failure of Traveling Screens FEF01 A & B MPEF--PEF 01 AB-CM 2.90E-05 MPPEF0I AB-CCF12 7.73E-05 Common Cause Failure of ESW Pumps PEF 01 A & B MVilV23456-CCF12 3.62E-05 Common Cause Failure of MOVs EFHV0023 & 0024 MVEF-HV002325-CM 6.89E-06 MVHV23456-CCF13 3.62E-05 Common Cause Failure of MOVs EFilV0023 & 0025 MVHV23456-CCF14 3.62E-05 Common Cause Failure of MOVs EFHV0023 & 0026 MVilV23456-CCF23 3.62E-05 Common Cause Failure of MOVs EFliV0024 & 0025 MVEF-HV002426-CM 6.89E-06 MVHV23456-CCF24 3.62E-05 Common Cause Failure of MOVs EFHV0024 & 0026 MVHV23456-CCF34 3.62E-05 Common Cause Failure of MOVs EFHV0025 & 0026 MVHV23456-CCF123 3.35E-06 Common Cause Failure of MOVs EFHV0023,0024 & 0025 MVHV23456-CCF124 3.35E-06 Common Cause Failum of MOVs EFHV0023,0024 & 0026 MVHV23456-CCFI34 3.35E-06 Common Cause Failure of MOVs EFHV0023,0025 & 0026 MVHV23456-CCF234 3.35 E-06 Common Cause Failure of MOVs EFHV0024,0025 & 0026 MVEF-HV023456-CM 3.01E-06 MVHV23456-CCFI-4 2.24E-05 Global CC Failure of MOVs EFHV0023,0024,0025 & 0026 MVEF-HV003738-CM 1.41 E-05 MVliV3738--CCF12 1.41 E-04 Common Cause Failure of MOVs EFilV0037 & 0038 MVEF-HV009192-CM 1.4 I E-05 MVHV00912-CCF12 1.41 E-04 Common Cause Failure of MOVs EFHV0091 & 0092
n.
Attachment to ET 96-0034 Page 32 of 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event identifier Description Identifier Common Event identifier Common Cause Value Cause Value AVEG-IIV0069AB-CM 3.62E-06 AVilV6970--CCF12 3.57E-05 Common Cause Failure of AOVs EGilV0069A & EGHV0069B AVHV6970--CCF13 3.57E-05 Common Cause Failure of AOVs EGHV0069A & EGilV0070A AVilV6970--CCF14 3.57E-05 Common Cause Failure of AOVs EGilV0069A & EGHV0070B AVHV6970--CCF23 3.57E-05 Common Cause Failure of AOVs EGHV00698 & EGHV0070A AVilV6970--CCF24 3.57E-05 Common Cause Failure of AOVs EGilV0069B & EGHV0070B AVEG-HV0070AB-CM 3.62E-06 AVilV6970-CCF34 3.57E-05 Common Cause Failure of AOVs EGHV0070A & EGHV0070B AVilV6970--CCF123 8.45E-06 Common Cause Failure of AOVs EGHV0069A, B & EGilV0070A AVilV6970--CCF124 8.45E-06 Common Cause Failure of AOVs EGilV0069A, B & EGilV0070B AVHV6970--CCF134 8.45E-06 Common Cause Failure of AOVs EGHV0069A, EGilV0070A & B AVHV6970--CCF234 8.45E-06 Common Cause Failure of AOVs EGHV0069B, EGHV0070A & B AVEG-HV6970-CM 6.43E-06 AVHV6970-CCF1-4 2.75E-05 Global CC Failure of AOVs EGHV0069A, B EGHV0070A & B CVV371216-CCF12 134E-06 Common Cause Failure of CVs EGV0003 & EGV0007 CVV371216-CCF13 134E-06 Common Cause Failure of CVs EGV0003 & EGV0012 CVV371216-CCF14 134E-06 Common Cause Failure of CVs EGV0003 & EGV0016 CVV371216-CCF23 134E-06 Conunon Cause Failure of CVs EGV0007 & EGV0012 CVV371216-CCF24 134E-06 Common Cause Failure of CVs EGV0007 & EGV0016 CVEG-V001216-CM 2.90E-07 CVV371216-CCF34 134E-06 Common Cause Failure of CVs EGV0012 & EGV0016 CVV371216-CCF123 3.17E-07 Common Cause Failure of CVs EGV0003,0007 & 0012 CVV371216-CCF124 3.17E-07 Common Cause Failure of CVs EGV0003,0007 & 0016 CVV371216-CCF134 3.17E-07 Common Cause Failure of CVs EGV0003,0012 & 0016 CVV371216-CCF234 3.17E-07 Common Cause Failure of CVs EGV0007. 0012 & 0016 CVV371216-CCF1-4 1.03E-06 Global CC Failure of CVs EGV0003,0007,0012 & 0016 l
Attechment to ET 96-0034 Page 33 of 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event Identifier Description Identifier Common Event Identifier Common Cause Value Cause Value MPPEG01AD-CCF12 9.53E-06 Common Cause Failure of CCW Pumps PEG 01 A & PEG 01B MPPEG01AD-CCF13 9.53E-06 Common Cause Failure of CCW Pumps PEG 01 A & PEG 01C MPPEGOI AD-CCFI4 9.53E-06 Common Cause Failure of CCW Pumps PEG 01 A & PEG 01D MPPEG01AD-CCF23 9.53E-06 Common Cause Failure of CCW Pumps PEG 01B & PEG 01C MPEG-PEG 01BD-CM 5.16E-06 MPPEG01AD-CCF24 9.53 E-06 Common Cause Failure of CCW Pumps PEG 01B & PEG 01D MPPEG01AD-CCF34 9.53E-06 Common Cause Failure of CCW Pumps PEG 01C & PEG 01D MPPEG01AD-CCF123 2.60E-06 Common Cause Failure of CCW Pumps PEGGI A B & C MPPEG01AD-CCF124 2.60E-06 Common Cause Failure of CCW Pumps PEG 01 A, B & D MPPEG01AD-CCF134 2.60E-06 Common Cause Failure of CCW Pumps PEG 01 A, C & D MPPEG01AD-CCF234 2.60E-06 Common Cause Failure of CCW Pumps PEG 01B. C & D MPPEG01 AD-CCF1-4 4.09E-05 Global CC Failure of CCW Pumps PEG 01 A, B, C & D MVEGRilV010102-CM
- .41E-05 MVEG10102-CCF12 1.41 E-04 Common Cause Failure of MOVs EGilV0101 & 0102 AVEiRFCV61819-CM 8.05E-08 AVFCV6189-CCF12 9.20E-07 Common Cause Failure of AOVs EJFCV0618 & EJFCV0619 AVEJIllCV60607-CM 2.50E-08 AVEJ60607-CCF12 2.88E-07 Common Cause Failure of AOVs EJifCV0606 & EJ11CV0607 CVEJ-8730AB-CM 2.90E-07 CV-8730AB-CCF12 6.00E-06 Common Cause Failure of CVs EJ8730A & EJ8730B CVEJ-8958AB-CM 2.90E-07 CV-8958AB-CCF12 6.00E-06 Common Cause Failure of CVs EJ8958A & EJ8958B CVEJ-8969AB-CM 2.90E-07 CV-8969AB-CCF12 6.00E-06 Common Cause Failure of CVs EJ8969A & EJ8969B MPEJ-PEJOI AB-CM 8.19E-06 MPPEJ01AB-CCF12 1.37E-04 Common Cause Failure of RilR Pumps PEJ01 A & B
Attachment to ET 96-0034 Page 34 of 69 Table 6 (Continued) i Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event Identifier Description Identifier Common Event Identifier Common Cause Value Cause Value MVEJ-IIV87012A-CM 6.87E-06 MV87012AB-CCF12 3.62E-05 Common Cause Failure of MOVs EJHV8701 A & BBPV8702A MV87012AB-CCFI3 3.62E-05 Common Cause Failure of MOVs EJHV8701 A & B MV87012AB-CCF14 3.62E-05 Common Cause Failure of MOVs EJHV8701 A & BBPV8702B MV87012AB-CCF23 3.62E-05 Common Cause Failure of MOVs BBPV8702A & EJHV8701B MV87012AB-CCF24 3.62E-05 Common Cause Failure of MOVs BBPV8702A & B MVEJ-HV87012B-CM 6.87E-06 MV87012AB-CCF34 3.62E-05 Common Cause Failure of MOVs EJHV8701B & BBPV8702B MV87012AB-CCF123 335E-06 Common Cause Failure of MOVs EJHV8701 A, B & BBPV8702A MV87012AB-CCF124 335E-06 Common Cause Failure of MOVs EJHV8701 A, BBPV8702A & B MV87012AB-CCF134 335E-06 Common Cause Failure of MOVs EJHV8701 A, B & BBPV8702B MV87012AB-CCF234 335E-06 Common Cause Failure of MOVs BBPV8702A, B & EJHV8701B MVEJR-IIV87012-CM 3.01E-06 MV87012AB-CCF1-4 2.24E-05 Global CC Failure of MOVs EJHV8701 A & B, BBPV8702A & B MVEJ-HV8716AB-CM I.41E-05 MVE8716AB-CCF12 1.41E-04 Common Cause Failure of MOVs EJHV8716A & B MVEJ-HV8804AB-CM 1.41 E-05 MV-8804AB-CCF12 1.41 E-04 Common Cause Failure of MOVs EJHV8804A & B MVEJ-HV881 I AB-CM 1.41E-05 MVE8811AB-CCF12 1.41 E-04 Common Cause Failure of MOVs EJHV881 I A & B MVEJIFCV61011-CM l.50E-07 MVEJ61011-CCF12 1.50E-06 Common Cause Failure of MOVs EJFCV0610 & 0611 CVEM-8922AB-CM 2.90E-07 CV-8922AB-CCF12 6.00E-06 Common Cause Failure of CVs EM8922A & EM8922B CVEM-8926AB-CM 2.90E-07 CV-8926AB-CCF12 6.00E-06 Common Cause Failure (FTO) of CVs EM8926A & EM8926B CVEMR-8926AB-CM 2.90E-06 CVC8926AB-CCF12 6.00E-05 Common Cause Failure (FTC) of CVs EM8926A & EM8926B CVEM-V0005007-CM 2.90E-07 CV-005007-CCF12 6.00E-06 Common Cause Failure of CVs EMV0005 & EMV0007 MPEM-PEM01 AB-CM 5.70E-05 MPPEM01AB-CCF12 1.78E-04 Common Cause Failure of St Pumps PEM01 A & B MVEMlHV8801 AB-CM l.41 E-05 MV-8801 AB-CCF12 1.41E-04 Common Cause Failure of MOVs EMHV8801 A & B MVEMlHV8803AB-CM 1.41 E-05 MV-8803AB-CCF12 1.41E-04 Common Cause Failure of MOVs EMHV8803A & B MVEM-HV8807AB-CM 1.41E-05 MV-8807AB-CCF12 1.41E-04 Common Cause Failure of MOVs EMHV8807A & B MVEMlHV8814AB-CM 4.75E-09 MV-8814AB-CCF12 4.75E-08 Common Cause Failure (FTRO) of MOVs EMHV8814A & B MVEMRHV8814AB-CM l.41 E-05 MVC8814AB-CCF12 1.41E-04 Common Cause Failure (FTC) of MOVs EMHV8814A & B MVEMlHV8821 AB-CM 137E-08 MV-8821 AB-CCF12 137E-07 Common Cause Failure of MO'!s EMHV8821 A & B
~ =-
Attachment to ET 96-0034 Page 35 of 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event Identifier Description Identifier Common Event Identifier Common Cause Value Cause Value MVEMlHV8923AB-CM 137E-08 MV-8923AB-CCF12 137E-07 Common Cause Failure of MOVs EMHV8923A & B CVEP-8818ABCD-CM I.40E-06 CVE8818AD-CCF12 134E-06 Common Cause Failure (FTO) of CVs EP8818A & EP8818B (B)
CVE8818AD-CCF13 134E-06 Common Cause Failure (FTO) of CVs EP8818A & EP8818C CVE8818AD-CCF14 134E-06 Common Cause Failure (FTO) of CVs EP8818A & EP8818D CVE8818AD-CCF23 134E-06 Common Cause Failure (FTO) of CVs EP8818B & EP8818C CVE8818AD-CCF24 134E-06 Common Cause Failure (FTO) of CVs EP88188 & EP8818D CVE8818AD-CCF34 134E-06 Common Cause Failure (FTO) of CVs EP8818C & EP881SD CVE8818AD-CCF123 3.17E-07 Common Cause Failure (FTO) of CVs EP8818A,8818B & 8818C CVE8818AD-CCF124 3.17E-07 Common Cause Failure (FTO) of CVs EP8818A,8818B & 8818D CVE8818AD-CCF134 3.17E-07 Common Cause Failure (FTO) of CVs EP8818A,8818C & 8818D CVE8818AD-CCF234 3.17E-07 Connnon Cause Failure (FTO) of CVs EP8818B,8818C & 8818D CVE8818AD-CCF1-4 1.03E-06 Global CC Failure (FTO) of CVs EP8818A,8818B,8818C & 8818D (A)
CVC8818AD-CCF12 134E-05 Common Cause Failure (FTRC) of CVs EP8818A & EP8818B CVC8818AD-CCF13 134E-05 Common Cause Failure (FTRC) of CVs EP8818A & EP8818C CVC8818AD-CCF14 134E-05 Common Cause Failure (FTRC) of CVs EP8818A & EP8818D CVC8818AD-CCF23 134E-05 Common Cause Failure (FTRC) of CVs EP8818B & EP8818C CVC8818AD-CCF24 134E-05 Common Cause Failure (FTRC) of CVs EP8818B & EP8818D CVC8818AD-CCF34 134E-05 Common Cause Failure (FTRC) of CVs EP8818C & EP8818D CVC8818AD-CCF123 3.17E-06 Common Cause Failure (FTRC) of CVs EP8818A,8818B & 8818C CVC8818AD-CCF124 3.17E-06 Common Cause Failure (FTRC) of CVs EP8818A,88188 & 8818D CVC8818AD-CCF134 3.17E-06 Common Cause Failure (FTRC) of CVs EP8818A,8818C & 8818D CVC8818AD-CCF234 3.17E-06 Common Cause Failure (FTRC) of CVs EP8818B,8818C & 8818D CVC8818AD-CCF1-4 1.03E-05 Global CC Failure (FTRC) of CVs EP8818A, B, C & D
Attachment to ET 96-0034 Page 36 of 69 Table 6 (Continued)
Revised Common Cause Valuts IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event Identifier Description Identifier Common Event Identifier Common Cause Value Cause Value CVEP-8956ABCD-CM 1.40E-05 CVC8956AD-CCF12 134E-05 Common Cause Failure of CVs EP8956A & EP8956B (B)
CVC8956AD-CCF13 134E-05 Common Cause Failure of CVs EP8956A & EP8956C CVC8956AD-CCF14 134E-05 Common Cause Failure of CVs EP8956A & EP8956D CVC8956AD-CCF23 134E-05 Common Cause Failure of CVs EP8956B & EP8956C CVC8956AD-CCF24 134E-05 Common Cause Failure of CVs EP8956B & EP8956D CVC8956AD-CCF34 134E-05 Common Cause Failure of CVs EP8956C & EP8956D CVC8956AD-CCF123 3.17E-06 Common Cause Failure of CVs EPS956A,8956B & 8956C CVC8956AD-CCF124 3.17E-06 Common Cause Failure of CVs EP8956A,8956B & 8956D CVC8956AD-CCF134 3.17E-06 Common Cause Failure of CVs EP8956A,8956C & 8956D CVC8956AD-CCF234 3.17E-06 Common Cause Failure of CVs EP8956B,8956C & 8956D CVC8956AD-CCF1-4 1.03 E-05 Global CC Failure of CVs EP8956A,8956B,8956C & 8656D
_CVEP ACC-CM 4.16E-06 CVEPACCUM-CCF1-6 235E-05 Global CC Failure of Accumulator Safety injection Check Valves CVEPV10203040-CM 1.40E-06 CVE102340-CCF12 134E-06 Common Cause Failure of CVs EPV0010 & EPV0020 (B)
CVE102340-CCF13 134E-06 Common Cause Failure of CVs EPV0010 & EPV0030 CVE102340-CCF14 134E-06 Common Cause Failure of CVs EPV0010 & EPV0040 CVE102340-CCF23 134E-06 Common Cause Failure of CVs EPV0020 & EPV0030 CVE102340-CCF24 134E-06 Common Cause Failure of CVs EPV0020 & EPV0040 CVE102340-CCF34 134E-06 Common Cause Failure of CVs EPV0030 & EPV0040 CVE102340-CCF123 3.17E-07 Common Cause Failure of CVs EPV0010. V0020 & V0030 CVE102340-CCF124 3.17E-07 Common Cause Failure of CVs EPV0010, V0020 & V0040 CVE102340-CCF134 3.17E-07 Common Cause Failure of CVs EPV0010. V0030 & V0040 CVE102340-CCF234 3.17E-07 Common Cause Failure of CVs EPV0020, V0030 & V0040 CVE102340-CCF1-4 1.03 E-06 Global CC Failure of CVs EPV0010, V0020. V0030 & V0040
Attachment to ET 96-0034 Page 37 of 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event identifier Description Identifier Common Event Identifier Common Cause Value Cause Value CVFC-V0122425-CM 1.40E-06 CVF122425-CCF12 134E-06 Common Cause Failure of CVs FCV0001 & FCV0002 (B)
CVF122425-CCF13 134E-06 Common Cause Failure of CVs FCV0001 & FCV0024 CVF122425-CCF14 134E-06 Common Cause Failure of CVs FCV0001 & FCV0025 CVF122425-CCF23 134E-06 Common Cause Failure of CVs FCV0002 & FCV0024 CVF122425-CCF24 134E-06 Common Cause Failure of CVs FCV0002 & FCV0025 CVF122425-CCF34 134E-06 Common Cause Failure of CVs FCV0024 & FCV0025 CVF122425-CCF123 3.17E-07 Common Cause Failure of CVs FCV0001, V0002 & V0024 CVF122425-CCFI24 3.17E-07 Common Cause Failure of CVs FCV0001, V0002 & V0025 CVF122425-CCF134 3.17E-07 Common Cause Failure of CVs FCV0001, V0024 & V0025 CVF122425-CCF234 3.17E-07 Common Cause Failure of CVs FCV0002, V0024 & V0025 CVF122425-CCF1-4 1.03 E-06 Global CC Failure of CVs FCV0001, V0002, V0024 & V0025 IIDGD-TZOI A11 A-CM 336E-08 IIDTZl Ai1 A-CCF12 3.84E-07 Common Cause Failure of Dampers GDTZ0001 A & GDTZOOII A IIDGD-TZOICI IC-CM 336E-08 IIDTZ1Cl1C-CCF12 3.84E-07 Common Cause Failure of Dampers GDTZ0001C & GDTZ0011C MFGD--CGD01 AB-CM 6.48E-06 MFCGD01AB-CCF12 7.02E-05 Common Cause Failure of Fan Units CGD01 A & B MFGF-SGF02AB-CM 6.48E-06 MFSGF02AB-CCF12 7.02E-05 Common Cause Failure of Fan Units SGF02A & B MFGL-SGLO9AB-CM 3.66E-06 MFSGLO9AB-CCF12 3.97E-05 Common Cause Failure of Fan Units SGLO9A & B MFGL--SGL10AB-CM 3.66E-06 MFSGL10AB-CCF12 3.97E-05 Common Cause Failure of Fan Units SGL10A & B MFGL-SGL12AB-CM 3.66E-06 MFSGL12AB-CCF12 3.97E-05 Common Cause Failure of Fan Units SGL12A & B ACGK-BOTilAC-CM 1.73E-06 ACSGK05AB-CCF12 1.58E-05 Common Cause Failure of AC Units SGK05A & B XXGM-BOTilHVAC-CM 3.19E-05 XXGM-BOT-CCCF12 1.94E-04 Common Cause Failure of EDG Rooms HVAC Systems XXJE-FUELOIL-CM 4.63E-05 XXJE-FU-CCCF12 2.52E-04 Common Cause Failure of EDG Fuel Oil Transfer Systems DGNE-BOTilEDGS-CM 1.08E-04 DGNE-BOT-CCCF12 3.85E-04 Common Cause Failure of Emer Diesel Gens NE01 & NE02
~
Attachment to ET 96-0034 Page 38 of 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event identifier Description Identifier Common Event Identifier Common Cause Value Cause Value (A)
BTNK11234-CCF12 4.29E-07 Common Cause Failure of Batteries NK11 & NK12 BTNKl1234-CCF13 4.29E-07 Common Cause Failure of Batteries NK11 & NK13 BTNK11234-CCF14 4.29E-07 Common Cause Failure of Batteries NK11 & NK14 BTNK11234-CCF23 4.29E-07 Common Cause Failure of Batteries NK12 & NK13 BTNK11234-CCF24 4.29E-07 Common Cause Failure of Batteries NK12 & NKI4 BTNK11234-CCF34 4.29E-07 Common Cause Failure of Batteries NK13 & NK14 BTNK11234-CCF123 1.01E-07 Common Cause Failure of Batteries NKlI, NK12 & NK13 -
BTNKI1234-CCF124 1.01E-07 Common Cause Failure of Batteries NK11, NK12 & NK14 BTNK11234-CCF134 1.01 E-07 Common Cause Failure of Batteries NKI 1. NK13 & NK14 BTNK11234-CCF234 1.01E-07 Common Cause Failure of Batteries NK12, NK13 & NK14 BWKI1234-CCF1-4 3.29E-07 Global CC Failure of Batteries NK11, NKl2, NK13 & NK14 (A)
BXNK21234-CCI !2 4.29E-07 Common Cause Failure of Chargers NK21 & NK22 BXNK21234-CCF13 4.29E-07 Common Cause Failure of Chargers NK21 & NK23 BXNK21234-CCF14 4.29E-07 Common Cause Failure of Chargers NK21 & NK24 BXNK21234-CCF23 4.29E-07 Common Cause Failure of Chargers NK22 & NK23 BXNK21234-CCF24 4.29E-07 Common Cause Failure of Chargers NK22 & NK24 BXNK21234-CCF34 4.29E-07 Common Cause Failure of Chargers NK23 & NK24 BXNK21234-CCF123 1.01E-07 Common Cause Failure of Chargers NK21, NK22 & NK23 BXNK21234-CCF124 1.01 E-07 Common Cause Failure of Chargers NK21, NK22 & NK24 BXNK21234-CCF134 1.01E-07 Common Cause Failure of Chargers NK21 NK23 & NK24 BXNK21234-CCF234 1.01 E-07 Common Cause Failure of Chargers NK22, NK23 & NK24 BXNK21234-CCF1-4 3.29E-07 Global CC Failure of Chargers NK21, NK22. NK23 & NK24
Attachment to ET 96-0034 Page 39 of 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event identifier Description Identifier Common Event Identifier Common Cause Value Cause Value INAC-NN11/14-CM 8.03 E-06 INNNI l-14-CCF12 4.29E-05 Common Cause Failure ofInverters NNII & NN12 (B)
INNNIl-14-CCF13 4.29E-05 Common Cause Failure ofInverters NNI1 & NN13 INNNIl-14-CCF14 4.29E-05 Common Cause Failure ofInverters NNII & NN14 INNN11-14-CCF23 4.29E-05 Common Cause Failure ofInverters NN12 & NN13 INNN11-14-CCF24 4.29E-05 Common Cause Failure ofInverters NN12 & NN14 INNN11-14-CCF34 4.29E-05 Common Cause Failure ofInverters NN13 & NN14 INNN11-14-CCF123 1.01E-05 Common Cause Failure ofInverters NNI1. NN12 & NN13 INNNIl-14-CCF124 1.01E-05 Common Cause Failure ofInverters NN11, NN12 & NN14 INNNil-14-CCF134 1.01E-05 Common Cause Failure ofinverters NNil, NN 13 & NN14 INNN11-14-CCF234 1.01E-05 Common Cause Failure ofInverters NN12, NN 13 & NN14 INNN11-14-CCF1-4 3.29E-05 Global CC Failure of Inverters NN 11, NN12, NN 13 & NN 14 i
(A)
INSN Il-14-CCF12 1.43E-05 Common Cause Failure ofInverters NN11 & NN12 (SBO)
INSN Il-14-CCF13 1.43E-05 Common Cause Failure ofInverters NN11 & NN13 (SBO)
INSNIl-14-CCF14 1.43E-05 Common Cause Failure ofInverters NN11 & NN14 (SBO)
INSNI l-14-CCF23 1.43E-05 Common Cause Failure ofInverters NN12 & NN13 (SBO)
INSNIl-14-CCF24 1.43E-05 Common Cause Failure ofInverters NN12 & NN14 (SBO)
INSN11-14-CCF34 1.43 E-05 Common Cause Failure ofInverters NN13 & NN14 (SBO)
INSNIl-14-CCF123 3.38E-06 Common Cause Failure ofInverters NNI1 NN12 & NN13 (SBO)
INSN11-14-CCF124 3.38E-06 Common Cause Failure ofInverters NNI1. NN 12 & NN14 (SBO)
INSN11-14-CCF134 3.38E-06 Common Cause Failure of Inverters NN I 1, NN 13 & NN 14 (SBO)
INSN11-14-CCF234 1.38E-06 Common Cause Failure ofInverters NN12, NN13 & NN14 (SBO)
INSNIl-14-CCF1-4 1.10E-05 Global CC Failure ofInverters NNI1 NN12, NN13 & NN14 (SBO) l
\\
Attachment to ET 96-0034 Page 40 o2 69 Table 6 (Continued)
Revised Common Cause Valuti IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event Identifier Description Identifier Common Event identifier Common Cause Value Cause Value FLSW-ISWOlFAB-CM 6.05E-06 FLSW-ABCD-CCF12 536E-05 Common Cause Failure of Traveling Screens ISWOIFA & B FLSW-ABCD-CCF13 536E-05 Common Cause Faihwe of Traveling Screens ISWOIFA & C FLSW-ABCD-CCF14 536E-05 Common Cause Failure of Traveling Screens ISW0lFA & D FLSW-ABCD-CCF23 536E-05 Common Cause Failure of Traveling Screens ISW0lFB & C FLSW-ABCD-CCF24 536E-05 Common Cause Failure of Traveling Screens ISWOIFB & D FLSW-ISWOIFCD-CM 6.05E-06 FLSW-ABCD-CCF34 536E-05 Common Cause Failure of Traveling Screens ISW0lFC & D FLSW-ABCD-CCF123 1.27E-05 Common Cause Failure of Traveling Screens ISW0lFA, B & C FLSW-ARCD-CCF124 1.27E-05 Common Cause Failure of Traveling Screens ISW0lFA, B & D FLSW-ABCD-CCF134 1.27E-05 Common Cause Failure of Traveling Screens ISW0lFA, C & D FLSW-ABCD-CCF234 1.27E-05 Common Cause Failure of Traveling Screens ISW0lFB, C & D FLSW-SWIFABCD-CM 1.08E-05 FLSW-ABCD-CCF1-4 4.12E-05 Global CC Failure of Traveling Screens ISW0lFA, B, C & D ESSF-LOCASEQX-CM 7.54E-06 ESLOCASEQ-CCF12 8.64E-05 Common Cause Failure of Both LOCA Sequencer Trains ESSF-SDSEQA/B-CM 7.54E-06 ESSDSEQAB-CCF12 8.64E-05 Common Cause Failure of Both Shutdown Sequencer Trains RESF-FS917/CD-CM 2.66E-06 REFS917CD-CCF12 3.03 E-05 Common Cause Failure of Relays FSO917C & FS0917D RESF-Kl/4101-CM 239E-05 REKI-4101-CCF12 2.73E-04 Common Cause Failure of Relays Kl101 & K4101 RESF-K1/4102-CM 239E-05 REKI-4102-CCF12 2.73E-04 Common Cause Failure of Relays KI I02 & K4102 RESF-Kl/4105-CM 239E-05 REKI-4105-CCF12 2.73E-04 Common Cause Failure of Relays K1105 & K4105 RESF-K1/4106-CM 239E-05 REKI-4106-CCF12 2.73E-04 Commen Cause Failure of Relays Kl106 & K4106 RESF-K1/4107-CM 239E-05 REKI-4107-CCF12 2.73E-04 Common Cause Failure of Relays KI107 & K4107 RESF-K1/4108-CM 239E-05 REKI-4108-CCF12 2.73E-04 Common Cause Failure of Relays K1108 & K4108 RESF-KI/4109-CM 239E-05 REKl-4109-CCF12 2.73E-04 Common Cause Failure of Relays K1109 & K4109 RESF-K1/4112-CM 2.39E-05 REKI-4112-CCF12 2.73E-04 Common Cause Failure of Relays Kl112 & K4112 RESF-Kl/4113-CM 239E-05 REKl-4113-CCF12 2.73E-04 Common Cause Failure of Relays KIi13 & K4113 RESF-K1/4115-CM 239E-05 REKi-4115-CCF12 2.73E-04 Common Cause Failure of Relays K1115 & K4115 RESF-K1/4 I 16-CM 239E-05 REK1-4116-CCF12 2.73E-04 Common Cause Failure of Relays K1116 & K4116 RESF-K1/4118-CM 239E-05 REK1-4I I8-CCF12 2.73E-04 Common Cause Failure of Relays KIII8 & K4118
Attachment to ET 96-0034 Paga 41 of 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event identifier Description Identifier Common Event Identifier Common Cause Value Cause Value RESF-K1/4120-CM 239E-05 REK1-4120-CCF12 2.73E-04 Common Cause Failure of Relays KI120 & K4120 RESF-Kl/4121-CM 239E-05 REK1-4121-CCF12 2.73 E-04 Common Cause Failure of Relays KI121 & K4122 RESF-Kl/4123-CM 239E-05 REK1-4123-CCF12 2.73 E-04 Common Cause Failure of Relays K1123 & K4123 RESF-Kl/4124-CM 239E-05 REKI-4124-CCF12 2.73E-04 Common Cause Failure of Relays Kl124 & K4124 RESF-Kl/4125-CM 239E-05 REK1-4125-CCF12 2.73E-04 Common Cause Failure of Relays KI125 & K4125 RESF-Kl/4126-CM 239E-05 REKl-4126-CCF12 2.73E-04 Common Cause Failure of Relays K1126 & K4126 RESF-Kl/4127-CM 239E-05 REK1-4127-CCF12 2.73 E-04 Common Cause Failure of Relays Kl127 & K4127 RESF-Kl/4128-CM 239E-05 REKI-4128-CCF12 2.73 E-04 Common Cause Failure of Relays Kl 128 & K4128 RESF-Kl/4131-CM 239E-05 REKI-4131-CCFI2 2.73E-04 Common Cause Failure of Relays Kl131 & K413 I RESF-Kl/4132-CM 239E-05 REKI-4132-CCF12 2.73 E-04 Common Cause Failure of Relays K1132 & K4132 RESF-Kl/4133-CM 2.39E-05 REKI-4133-CCF12 2.73 E-04 Common Cause Failure of Relays K1133 & K4133 RESF-Kl/4135-CM 239E-05 REKI-4135-CCF12 2.73E-04 Common Cause Failure of Relays K1135 & K4135 RESF-Kl/4137-CM 239E-05 REK1-4137-CCF12 2.73E-04 Common Cause Failure of Relays K1137 & K4137 RESF-Kl/4138-CM 2.39E-05 REKI-4138-CCF12 2.73E-04 Common Cause Failure of Relays K1138 & K4138 RESF-K1/4173-CM 239E-05 REK1-4173-CCF12 2.73 E-04 Common Cause Failure of Relays Kl 173 & K4173 RESF-K101/102-CM 239E-05 REK101-2-CCF12 2.73E-04 Coiamon Cause Failure of Relays K101 & K102 RESF-KI14/116-CM 239E-05 REK114-6-CCF12 2.73E-04 Common Cause Failure of Relays Kl14A & Kl16B RESF-K116/118-CM 2.39E-05 REK116118-CCF12 2.73E-04 Common Cause Failure of Relays K116A & KI18B RESF-KI17/l19-CM 239E-05 REKI17119-CCF12 2.73E-04 Common Cause Failure of Relays K117A & K119B RESF-KI19/121-CM 239E-05 REKI19121-CCF12 2.73E-04 Common Cause Failure of Relays K119A & K121B RESF-K127/131-CM 239E-05 REK127131-CCF12 2.73E-04 Common Cause Failure of Relays K127 & K131 RESF-K140/149-CM 239E-05 REK140149-CCF12 2.73E-04 Common Cause Failure of Relays K140A & K149B RESF-K141/150-CM 239E-05 REK141150-CCF12 2.73E-04 Common Cause Failure of Relays K141 A & K150B RESF-Kl42/151-CM 239E-05 REK142151-CCF12 2.73E-04 Common Cause Failure of Relays K142A & K151B RESF-K162/436-CM 239E-05 REK162436-CCF12 2.73E-04 Common Cause Failure of Relays K162A & K436B RESF-K501 A/B-CM 2.66E-06 REK501 A-B-CCF12 3.04E-05 Common Cause Failure of Relays K501 A & B
Attachment to ET 96-0034 Page 42 of 69 Table 6 (Continued)
Revised Common Cause Vatues IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event Identifier Description Identifier Common Event Identifier Common Cause Value Cause Value RESF-K502NB-CM 2.66E-06 REK502A-B-CCF12 3.04 E-05 Common Cause Failure of Relays K502A & B RESF-K503NB-CM 2.66E-06 REK503A-B-CCF12 3.04E-05 Common Cause Failure of Relays K503A & B RESF-K504A&B-CM 2.66E-06 REK5MA-B-CCF12 3.04E-05 Common Cause Failure of Relays K504A & B RESF-K505A/B-CM 2.66E-06 REK505A-B-CCF12 3.04E-05 Common Cause Failure of Relays K505A & B RESF-K507NB-CM 2.66E-06 REK507A-B-CCF12 3.04E-05 Common Cause Failure of Relays K507A & B RESF-K514A/B-CM 2.66E-06 REK514A-B-CCF12 3.04 E-05 Common Cause Failure of Relays K514A & B RESF-K519A/B-CM 2.66E-06 REK519A-B-CCF12 3.04E-05 Common Cause Failure of Relays K519A & B RESF-K520NB-CM 2.66E-06 REK520A-B-CCF12 3.04E-05 Common Cause Failure of Relays K520A & B RESF-K521 A/B-CM 2.66E-06 REK521 A-B-CCF12 3.04E-05 Common Cause Failure of Relays K521 A & B RESF-K525A/B-CM 2.66E-06 REK525A-B-CCF12 3.04E-05 Common Cause Failure of Relays K525A & B RESF-K527A/B-CM 2.66E-06 REK527A-B-CCF12 3.04E-05 Common Cause Failure of Relays K527A & B RESF-K60lNB-CM 3.98E-06 REK601 A-B-CCF12 4.55E-05 Common Cause Failure of Relays K601 A & B RESF-K602NB-CM 2.39E-05 REK602A-B-CCF12 2.73 E-04 Common Cause Failure of Relays K602A & B RESF-K603NB-CM 3.98E-06 REK603A-B-CCF12 4.55E-05 Common Cause Failure of Relays K603A & B RESF-K604A&B-CM 3.98E-06 REK604A-B-CCF12 4.55E-05 Common Cause Failure of Relays K604A & B RESF-K605A/B-CM 3.98E-06 REK605A-B-CCF12 4.55E-05 Common Cause Failure of Relays K605A & B RESF-K606A/B-CM 3.98E-06 REK606A-B-CCF12 4.55E-05 Common Cause Failure of Relays K606A & B RESF-K607A/B-CM 3.98E-06 REK607A-B-CCF12 4.55E-05 Common Cause Failure of Relays K607A & B RESF-K608A/B-CM 3.98E-06 REK608A-B-CCF12 4.55E-05 Common Cause Failure of Relays K608A & B RESF-K609A/B-CM 3.98E-06 REK609A-B-CCF12 4.55E-05 Common Cause Failure of Relays K609A & B RESF-K610NB-CM 3.98E-06 REK610A-B-CCF12 4.55E-05 Common Cause Failure of Relays K610A & B RESF-K615NB-CM 3.98E-06 REK615A-B-CCF12 4.55E-05 Common Cause Failure of Relays K615A & B RESF-K616NB-CM 3.98E-06 REK616A-B-CCF12 4.55E-05 Common Cause Failure of Relays K616A & B RESF-K630A/B-CM 2.39E-05 REK630A-B-CCF12 2.73 E-04 Common Cause Failure of Relays K630A & B RESF-K634A&B-CM 3.98E-06 REK634A-B-CCF12 4.55E-05 Common Cause Failure of Relays K634A & B RESF-K637NB-CM 3.98E-06 REK637A-B-CCF12 4.55E-05 Common Cause Failure of Relays K637A & B l
~.
Attachment to ET 96-0034 Prga 43 cf 69 Table 6 (Continued)
Revised Common Cause Values IPE Submittal Event IPE Submittal Current WCGS PSA Revised Common Cause Event Identifier Description Identifier Common Event Identifier Common Cause Value Cause Value RESF-K643A/B-CM 3.98E-06 REK643A-B-CCF12 4.55E-05 Common Cause Failure of Relays K643A & B RESF-K644A/B-CM 3.98E-06 REK644A-B-CCF12 4.55E-05 Common Cause Failure of Relays K644A & B RESF-K647A/B-CM 3.98E-06 REK647A-B-CCF12 4.55E-05 Common Cause Failure of Relays K647A & B RESF-K648A/B-CM 3.98E-06 REK648A-B-CCF12 4.55E-05 Common Cause Failure of Relays K648A & B RESF-K649A/B-CM 3.98E-06 REK649A-B-CCF12 4.55E-05 Common Cause Failure of Relays K649A & B RESF-K713A/B-CM 3.98E-06 REK713A-B-CCF12 4.55E-05 Common Cause Failure of Relays K713A & B RESF-K740A/B-CM 239E-05 REK740A-B-CCF12 2.73E-04 Common Cause Failure of Relays K740A & B RESF-K741 A/B-CM 2.39E-05 REK741 A-B-CCF12 2.73 E-04 Common Cause Failure of Relays K74I A & B RESF-K743A/B-CM 3.98E-06 REK743A-B-CCF12 4.55E-05 Common Cause Failure of Relays K743A & B RESF-K744A/B-CM 3.98E-06 REK744A-B-CCF12 4.55E-05 Common Cause Failure of Relays K744A & B RESF-K745A/B-CM 3.98E-06 REK745A-B-CCF12 4.55E-05 Common Cause Failure of Relays K745A & B RESF-K752A/B-CM 3.98E-06 REK752A-B-CCF12 4.55E-05 Common Cause Failure of Relays K752A & B CASF-WESF-CM 2.04E-05 CA-ESF----CCF12 1.75E-04 Common Cause Actuation Signal Failures Without OPA CASF-WESFO-CM 2.08E-09 CA-ESFO---CCF12 1.79E-08 Common Cause Actuation Signal Failures With OPA SSSS RTIO-CM 5.68E-07 SS-RTIO---CCF12 1.35E-05 Common Cause RTRIPI Failure With OPA SSSS RT20-CM 3.14E-07 SS-RT20---CCF12 1.16E-05 Common Cause RTRIP2 Failure With OPA
~MPWS-1WS0lPAB-CM I.08E-05 MPWS-1WS0lPAB-CM 2.30E-05 Common Cause Failure of Service Water Pumps IWS0lPA & B (A)
Common cause failure events added to the WCGS PSA model subsequent to the time of the IPE Submittal.
(B)
Common cause failure events previously :ocated at the fault tree top logic level which have been expanded using the NUPRA automatic common cause failure event generation feature, with the expanded common cause failure events located in the fault tree at the component level
Attachmsnt to ET 96-0034 Page 44 of 69 Core Damage Seanence Ouantification Results The WCGS PSA model event tree sequences leading to core damage were quantified using the revised HRA and Common Cause values. Discussion of the determination of the revised HRA and Common Cause values, along with presentation of the revised values, has been previously provided in this document.
Quantification of the WCGS PSA model using the revised HRA and Common Cause values resulted in a total core damage frequency of 6.19E-05/ year. This is an increase of approximately 47 % over the 4.2E-05/ year core damage frequency value reported in the IPE Submittal. The 6.19E-05/ year core damage frequency value was quantified using a truncation limit of 1.0E-10, with a resultant 19,738 core damage cutsets.
Table 7 presents the relative contribution of each initiating event, or transfer event, to the 6.19E-05/ year total core damage frequency. Figure 1 provides a graphical representation of the breakdown of the total core damage frequency by initiating, or transfer, event.
Table 8 presents, in order of descending frequency, all of the event tree sequences with a core damage frequency value of 1.0E-08/ year or greater. These top 98 core damage sequences account for 99.74 % of the total core damage frequency.
Observations and Notes Concerning the Revised Core Damage Results Indications of the relative contribution of each initiating event are provided in Table 3.4-2 of the IPE Submittal Document for the IPE Submittal CDF results, and in Table 7 of this document for the revised CDF results. The percentage contribution to the total CDF changed for several initiators with the magnitude of the change being significantly influenced by the impact of the revised HRA and Common Cause failure l
values on the core damage sequence quantification results for the specific initiator.
The dominant core damage sequences for the IPE Submittal are provided in Table j
3.4-1 of the IPE Submittal Document. The dominant core damage sequences for the j
revised CDF results are provided in Table 8 of this document. Examples of core damage sequences in Table 8 which increased in frequency from their Table 3.4-1 value primeily due to the revised common cause failyre values include:
4 Table 8 IPE Submittal Table 3.4-1 Sequence Number 6 (5.8 %)
Sequence Number 14 (2.68 %);
Sequence Number 7 (4.9 %)
Sequence Number 9 (4.35 %);
Sequence Number 9 (3.0 %)
Below the Table 3.4-1 Cutoff of 1.0E-08; Sequence Number 10 (2.7 %)
Sequence Number 24 (0.66 %);
)
Sequence Number 13 (2.0 %)
Sequence Number 29 (0.49 %);
Sequence Number 14 (2.0 %)
Sequence Number 18 (1.57 %);
Sequence Number 15 (1.6 %)
Sequence Number 30 (0.41 %).
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Attachm:nt to ET 96-0034 Page 45 of 69 Examples of ;: ore damage sequences in Table 8 which increased in frequency from their Table 3.4-1 value primarily due he revised HRA values include:
Iable 8 Table 3.4-1 Sequence Number 8 (3.3 %)
Sequence Number 20 (1.14 %);
Sequence Number 16 (1.5 %)
Sequence Number 34 (0.21 %);
Sequence Number 19 (1.2 %)
Sequence Number 25 (0.62 %).
a brief discussion regarding the performance of a reanalysis of the internal flooding I
events. The revised CDF results presented in Tables 7 and 8 include the reanalyzed internal flooding scenarios. The reanalyzed internal flooding scenarios provided a more significant ceauction in the relative contribution ofinternal flooding initiators to the total CDF than the relative increase which is provided by incorporation of the revised HRA or Common Cause failure values. Examples of core damage sequences in Table 8 which c;ecreased in frequency from their Table 3.4-1 value due to the internal flooding reanalysis include:
Table 8 IPE Sabmittal Table 3.4-1 Sequence Number 17 (1.4 %)
Sequence Number 2 (10.44 %);
Sequence Numbers 26 (0.7 %),
Sequence Numbers 7 (5.13 %) and 33 (0.5 %),39 (0.3 %),
16 (2.09 %).
48 (0.2 %),51 (0.2 %),
53 (0.1 %), and others less than 0.1 %
The conversion of the WCGS PSA model to the NUPRA software facilitated the transfer of sequence end points, as appropriate, from one event tree into a second event tree structure. Transfer of sequence cutset files from one event tree into a second event tree provides for improved handling of dependencies within the sequence. For the WCGS IPE, only the Loss of Offsite Power initiator cutsets which progressed to Station Blackout were transferred into a second event tree structure.
For this revised CDF quantification, cutsets associated with occurrence of the following conditions subsequent to a transient type initiating event were transferred, as appropriate, into a second event tree structure: Cutsets representing failure of the Reactor Trip Function following a transient type initiator were transferred into the Anticipated Transient Without Scram (ATW) event tree. Cutsets representing failure 1
~
of a challenged Pressurizer Power Operated Relief Valve (PORV) to reclose, or to be 1
isolated, following a transient type initiator were transferred into the Stuck Open Pressurizer PORV (PRV) event tree. Cutsets representing failure of the Reactor 4
Odant Pump (RCP) Seal Cooling Function following a transient type initiator were transferred into the Loss of RCP Seal Cooling (RCP) event tree. Cutsets representing local component or HRA related failures of the RCP Seal Cooling Function following a transient type initiator, where at least one CCW train remains available, were j
transferred into the Loss of RCP Seal Cooling With One CCW Train Available (SLR)
Attcchment to ET 96-0034 Page 46 of 69 event tree. The ATW event was included in the IPE core damage results with the initiating event frequency input as a scalar value. The three remaining transfer events were not specifically addressed as separate events in the IPE results and do not appear
{
in Table 3.4-2 of the IPE Submittal. Examples of Loss of RCP Seal Cooling core damage sequences which appear as transfer event type sequences in Table 8 and their corresponding Loss of RCP Seal Cooling type sequence from Table 3.4-1 of the IPE Submittal include:
Table 8 IPE Submittal Table 3.4-1 Numbers 12 (2.1 %t 18 (1.4 %t Same tvoe as Secuence Numbers 20 (1.2 %t and 23 (0.9 %)
8 (5.11 %L and 13 (3.06 %L Quantification of the Station Blackout (SBO) event tree sequences using the NUPRA e
software proceeded in a slightly different manner than quantification of this event tree for the IPE Submittal. Quantification of the SBO event tree sequences for the IPE Submittal included consideration for recovery of either Offsite AC Power, or recovery of at least one Emergency Diesel Generator (EDG). Quantification of the SBO event tree sequences for this revised CDF considered recovery of Offsite AC Power but did not include consideration for recovery of an EDG. Additionally, the SBO event tree includes two top events for consideration of Offsite AC Power recovery. If Offsite AC Power was not recovered within the "XHR" time period, then recovery within the "YHR" period was considered. Quantification of the SBO event tree for the IPE Submittal did not utilize the "YHR" Offsite AC Power recovery probability (i.e.,
failure of the "YHR" top event was assigned a value of 1.0). Quantification of the SBO event tree sequences for this revised CDF included consideration for the "YHR" Offsite AC Power recovery probability. The above two changes in the manner of quantifying the SBO event tree were made strictly for the purpose of simplifying the overall core damage quantification process. Simplifying the process resulted in a reduction in the time required for accomplishing the core damage quantification. The above two changes were, for the most part, offsetting in their net impact on the total SBO and overall CDF results. The above two changes did, however, result in a change in the core damage frequency for many of the individual SBO sequences and, therefore, a change in the relative contribution of a given sequence to the overall CDF. Examples of SBO sequences in Table 8 which changed in frequency, and thereby relative contribution, from their Table 3.4-1 value include:
l
Attachmsnt to ET 96-0034 Page 47 of 69 Table R IPE Submittal Table 3.4-1 Sequence Number 1 (16.9 %)
Sequence Number 3 (6.7 %);
Sequence Number 2 considers Sequence Numbers 6 (5.14 %) and "YHR" recovery and, therefore, 11 (3.83 %) which consider EDG did not appear in Table 3.4-1 recovery and do not appear in Table 8 Sequence Number 3 (7.7 %)
Similar to Sequence Number 1 (13.77 %);
Sequence Number 4 (6.3 %)
Sequence Number 10 (3.84 %);
Sequence Number 21 (1.2 %)
Sequence Number 28 (0.54 %);
Sequence Number 24 (0.9 %)
Sequence Number 21 (0.93 %).
Quantification of the Station Blackout (SBO) event tree sequences using the NUPRA software proceeded in a slightly different manner than quantification of this event tree for the IPE Submittal in one additional area. Quantification of the SBO event tree l
sequences for the IPE Submittal included consideration for operation of the Essential Service Water (ESW) System upon recovery of either Offsite or Onsite AC Power.
ESW related failures contained in cutsets which proceeded to SBO, therefore, were retair ' as failures even though an AC power supply was recovered. Quantification of the SBO event tree sequences for this revised CDF included consideration for operation of both the ESW System and Normal Service Water System upon recovery l
of Offsite AC Power. Accordingly, operation of the Normal Service Water System l
was considered for cutsets which proceeded to SBO and contained ESW related failures.
Examples of SBO sequences in Table 8 which benefited from the consideration of Normal Service Water System operation include:
Table 8 IPE Submittal Table 3.4-1 Sequence Number 22 (1.0 %)
Sequence Number 5 (6.48 %);
Sequence Number 92 (< 0.1 %)
Sequence Number 12 (3.56 %).
HRA interview discussions with WCGS Operations and Training personnel, which occurred subsequent to completion of the IPE Submittal, lead to the conclusion that l
the placement of the Low Pressure Injection (LPI) and Low Pressure Recirculation (LPR) top events within the Loss of Component Cooling Water (CCW) event tree did not correspond well with plant procedures. While Low Pressure Injection may be successfully accomplished without CCW cooling, the Wolf Creek Emergency l
Operating Procedures require the existence of CCW cooling in order to accomplish l
the Low Pressure Recirculation function. Therefore, the LPI and LPR top events l
were relocated within the CCW event tree such that CCW cooling must be successfully restored before either the LPI or LPR functions are considered. This top event relocation results in an increase in the frequency of several CCW core damage sequences which previously included consideration for failure of the LPI function.
Examples of CCW sequences in Table 8 which increased in frequency due to the relocation of the LPI and LPR top events include:
Attachmsnt to ET 96-0034 Page 48 of 69 Table 8 IPE Submittal Table 3.4-1 Sequence Number 5 (5.9 %)
Sequence Number 47 (0.06 %);
Sequence Number 31 (0.5 %)
Sequence Number 46 (0.06 %);
Sequence Number 32 (0.5 %)
Sequence Number 33 (0.24 %).
'A problem was identified in the Westinghouse software input files used for quantification of the Loss of Offsite Power (LSP) transient event tree during conversion of the WCGS PSA model to the NUPRA software. This flaw in the input file allowed some cutsets which progressed to a Station Blackout (SBO) condition to be retained in the quantified LSP core damage sequences. This resulted in higher frequencies, and therefore higher relative contributions to the overall CDF, for the LSP core damage sequences. The NUPRA software input files for quantification of the LSP sequences for the CDF which includes the revised HRA and Common Cause values prevents inclusion of cutsets leading to SBO. Examples of LSP sequences in Table 8 which decreased in frequency due to correction of the quantification input files include:
Table 8 IPE Submittal Table 3.4-1 Sequence Number 11 (2.2 %)
Sequence Number 4 (6.67 %);
Sequence Number 52 (0.1 %)
Sequence Number 17 (1.93 %).
For the IPE Submittal, recovery of at least one train of either the Essential Service Water (ESW) or Component Cooling Water (CCW) system was addressed in the quantification of the Loss of All Service Water (SWS) and Loss of Component Cooling Water (CCW) event trees by selecting a specific train of the failed system to assign as recovered. For this revised CDF, recovery of at least one train of either the ESW or CCW system was accomplished by assigning a split fraction to recovery of either of the two trains or recovery of both trains. Quantification with consideration of recovery tenns in this manner resulted in a decrease in frequency for several core damage sequences. An example of a sequence in Table 8 which decreased in frequency due to consideration of recovery terms in this manner is:
Table 8 IPE Submittal Table 3.4-1 Secuence Number 43 (0.2 O Seauence Number 15 (2.31 O.
The Loss of a Vital DC Bus (DCC) initiating event in the IPE included loss of both e
bus NK01 and NK04. The WCGS PSA model converted to the NUPRA software separates out the failures of these two DC Buses and treats them as separate initiating events. The Loss of Vital DC Bus NK01 initiating event is assigned the DCl identifier with the Loss of Vital DC Bus NK04 event assigned the DC4 identifier.
Attachmant to ET 96-0034 Page 49 of 69 i
i The Very Small LOCA (VLO) initiating event was added to the WCGS PSA model at e
the time of conversion to the NUPRA software. For the IPE, this initiator was not assumed to provide a significant contribution to the overall CDF and was, therefore, not included. This initiating event is frequently included in PSA evaluations and was, therefore, added to the WCGS PSA model. The small relative contribution (0.2 %) of the VLO event to the revised total CDF provides confirmation of the validity 'of the original assumption that this initiator is not a significant contributor to the overall CDF.
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Attachment to ET 96-0034 Page 50 of 69 Level 2 Impact Due To Revised Level 1 Core Damnoe Sequences A review of the revised core damage sequences in Table 8 was performed to determine what impact the results would have upon the Level 2 Conclusions in the IPE Submittal.
A summary of the sequence review is listed below. Although changes have been made in the event trees and fault trees, new software used for quantification, and common cause and HRA re-analyzed, no significant sequences were identified that would alter the basic -
Level 2 Conclusions in the IPE Submittal.
i As noted in the Level 2 Conclusions, 86.5% of the WCGS Source Term is due to containment bypass. Based upon the revised PSA model results, containment bypass will continue to dominate the WCGS Total Release Fraction. The containment bypass release 1
mode will increase due to steam generator tube rupture sequence #60 (Table 8). The l
sequence is affected by both the common cause and HRA re-analysis. Sequence #60 was previously identified as SGR19D in Table 4.3-2 of the IPE Submittal.
Key Sequences For Containment Bypass:
[8* "
Table 8 Table 8 CDF IPE Submittal Table 3.4-1 IPE CDF PE Sequence Number 57 6.11E-08 Sequence Number 36 6.11E-08 0.00E+00 Sequance Number 60 5.28E-08 Sequence Number 53 1.20E-08 4.08E-08 1.14E-07 7.31E-08 4.08E 08 The impact on source term from containment overpressure failures is expected to be neutral or a minor reduction. The reason for little or no change for this failure mode is that the top affected sequences have lower CDFs in the revised model results.
Key Sequences For Containment Overpressure -- Bins 2,3,8,9 h ge j
Table 8 Table 8 CDF IPE Submittal Table 3.4-1 IPE CDF 9m PE Sequence Number 22 6.05E-07 Sequence Number 11 1.64E-06
-1.04E-06 j
Sequence Number 11 1.36E-06 Sequence Number 4 2.86E-06
-1.50E-06 1.97E-06 4.50E-06
-2.54E-06 The Containment Isolation failure mode contains sequences that both increased and decreased in core damage frequency. An internal flooding sequence, #17, and a station blackout sequence, #22 (See Table 8), had the greatest decreases in CDF. Station blackout sequence #2 had the greatest increase in CDF. The net result is most likely to be a slight positive increase in the containment isolation failure mode release fraction.
Attechmtnt to ET 96-0034 l
Page 51 of 69 y
Key Sequences For Containment Isolation -- Bin 14 Table 8 Table 8 CDF IPE Submittal Table 3.4-1 IPE CDF 8*
m PE Sequence Number 17 8.93E-07 Sequence Number 2 4.46E-06
-3.57E-06 Sequence Number 22 6.05E-07 Sequence Number 5/11 4.42E-06
-3.82E-06 Sequence Number 1 9.90E-06 Sequence Number 3 2.87E-06 7.03E-06 j
Sequence Number 3 4.76E-06 Sequence Number 1 5.89E-06
-1.13E-06 Sequence Number 49 1.10E-07 Like Seq. Number 1 1.10E-07 Sequence Number 92 1.28E-08 Sequence Number 12 1.53E-06
-1.52E-06 4
Sequence Number 2 7.06E-06 Sequence Number 7 2.20E-06 4.86E-06 Sequence Number 4 3.89E46 Sequence Number 10 1.65E-06 2.24E-06 TOTAL 2.72E-05 2.30E-05 4.21E-06 j
The CDF for sequences in the Containment Intact (Normal Leakage) mode has increased.
However, due to the small contribution to the Total Release Fraction as reported in the j
IPE Submittal, it is unlikely to affect the conclusions.
CCW6 and SWS4 (IPE Submittal Table 3.4-1 #47 and 20, respectively) are functionally similar. Neither of these sequences added to the Total Release Fraction in the IPE Submittal. This is due to the relatively low CDF of CCW6, and the cooling support systems are recovered prior to the core being uncovered (CCW6 and SWS4). The equivalent sequences, in the revised core damages sequence list, are CCW S08 and SWS
)
S06 (Table 8, #5 and 8, respectively). Since the revised core damage frequencies are considerably higher than in the IPE, it is expected that both would now contribute to the Total Release Fraction. Sequence 5 and 8 would map to the containment intact release i
mode bin.
An initiating event category that rose in CDF is Anticipated Transient Without Scram (ATWS). Sequence ATW S06 (Table 8 #9) and other ATWS sequences, increased due to the common cause and HRA reanalysis. Most of these sequences are likely to be binned the same as the TRA5 and TRO4 sequences in the IPE Submittal; that is, they will be binned in the containment normal leakage release mode.
Based upon the CDF increases in the normal containment leakage bin, both the individual release mode and Total Release Fraction would increase. However, the impact upon the totals would be minimal and the Level 2 Conclusions would not be altered. Normal leakage accounted for only one percent (1%) of the IPE total source term. A fifty percent increase in CDF, in the one-percent release mode, is not a significant release increase overall.
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Attachm:nt to ET 96-0034 Page 52 of 69 Key Sequences For Containment Normal Leakage -- Bins 1,4,5,6,7,10,12 Change in CDF Table 8 Table 8 CDF IPE Submittal Table 3.4-1 IPE CDF From IPE Sequence Number 17 8.93E-07 Sequence Number 2 4.46E-06
-3.57E-06 Sequence Number 3 4.76E-06 Sequence Number 1 5.89E-06
-1.13E-06 Sequence Number 2 7.06E-06 Sequ uce Number 7 2.20E-06 4.86E-06 Sequence Number 4 3.89E-06 Sequence Number 10 1.65E-06 2.24E-06 Sequence Number 5 3.64E-06 Sequence Number 47 2.42E-08 3.62E-06 Sequence Number 8 2.07E-06 Sequence Number 20 4.86E-07 1.58E-06 l
Sequence Number 6 3.62E-06 Sequence Number 14 1.15E-06 2.47E-06 l
Sequence Number 10 1.69E-06 Sequence Number 24 2.83E-07 1.41E-06 2.76E-05 1.61E-05 1.15E-05 o
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Attachment to ET 96-0034 Pegn 53 of 69 TABLE 7 Core Damage Frequency By Initiating Event Total Core Damage Frequency = 6.19E-05/ year Initiating Event Core Damage Percent Initiating Event Frequency #vr)
Frequency Uvr)
Contribution SBO - Station Blackout 2.51E-04 2.78E-05 44.9 %
LLO - Large LOCA 5.00E-04 532E-06 8.6%
SWS - Loss of All Service Water 6.49E-05 4.91E-06 7.9%
CCW - Loss of Component Cooling Water 1.55E-04 439E-06 7.1%
RCP - Loss of Reactor Coolant Pump Seal Cooling Following a 4.43E-04 3.40E-06 5.5%
Transient Initiator ATW - Anticipated Transient Without Scram 5.05E-05 3.09E-06 5.0%
MLO - Medium LOCA 1.10E-03 3.06E-06 4.9%
LSP - Loss of Offsite Power 5.10E-02 1.45E-06 23 %
TRA - Transients With Power Conversion Systems Available 4.30E+00
- 1.40E-06 23 %
SLO - Small LOCA 2.50E-03 1.26E-06 2.0%
FL3 - Control Building Basement Floods 4.91 E-06 1.24E-06 2.0%
TRO - Transients Without Power Conversion Systems Available 1.90E-01 1.23E-06 2.0%
FLN - Nonrecoverable ESF Switchgear Room Floods 8.93E-07 8.93E-07 1.4%
SGR - Steam Generator Tube Rupture 1.10E-02 8.12E-07 13 %
-. =
Atta:chment to ET 96-0034 Pcga 54 of 69 TABLE 7 (Continued)
Core Damage Frequency By Initiating Event Initiating Event Core Damage Percent Initiatine Event Frequency Uvr)
Frequency Uvr)
Contribution SLR - Loss of Reactor Coolant Pump Seal Cooling With At 3.47E-04 7.51E-07 1.2%
Least One CCW Train Available VEF - Re-ctor Vessel Failure 3.00E-07 3.00E-07 0.5%
FL1 - Turbine Building Flood 2.26E-02 238E-07 0.4%
VLO - Very Small LOCA 130E-02 133E-07 0.2%
ISL-Interfacing Systems LOCA 6.11E-08 6.11E-08 0.1%
SLB - Steamline/Feedline Break 5.00E-04 5.07E-08 0.1%
DC4 - Loss of Vital DC Bus NK04 2.64E-03 4.69E-08 0.1%
DC1 - Loss of Vital DC Bus NK01 2.64E-03 4.64E-08 0.1%
FL5 - Auxiliary Building Level 2026 Floods 4.46E-07 3.99E-08 0.1%
PRV - Stuck Open Pressurizer PORV Following a Transient Initiator 1.19E-05 2.07E-08 0.0%
FL2 - Room 3302 Spray Event 7.45E-05 4.37E-09 0.0%
FL4 - Recoverable ESF Switchgear Room Floods 8.13E-06 0.00E+00 0.0%
Attachment to ET 96-0034 Page 55 of 69 FIGURE 1 WCGS PSA CORE DAMAGE BY INITIATING EVENT 4.9%
Station Blackout Large LOCA @ 8.6%
7 M0 Loss Of SerWee Water Loss Of Component Cooling Water % 7.1%
Loss of RCP Seal Cooling Following a 5.5%
Transient initiator
-06 Anticipated Transient Without Scram %
%[
Medium LOCA 2
Loss Of Ofsite Power %4 Transients With Power Comersion g2.3%
Systems Amilable T.40E46 Small LCCA %q Control Building Basement Flood %2d 4 Transients Without Fower Conersion g2.0%
Systems Amitable T23E-06 Non-Recowrable ESF Switchgear Room a1.4%
Floods 3.93E-07 Steam Generator Tube Rupture (li 07 Mine 0%
10 %
20 %
30 %
40%
50 %
60 %
70 %
80 %
90 %
100 %
Percent of Total Core Damage 100%= 6.19E-5nfr
Attachment to ET 96-0034 Pcgs 56 of 69 TABLE 8 Core Damage Seauences Total Core Damage Frequency = 6.19E-05 Sequence Sequence Percent Number Identifier Freamency (/vr)
Contributaen Sequence Descriptsom 1
SBOSO4 9.90E-06 16.0 %
Station Blackout Initiating Event Occurs; RCS Cooldown and Depressunzation is successful; Offsite AC power recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery occurs within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
2 SBOSO9 7.06E-06 11.4 %
Station Blackout Initiating Event Occurs, RCS Cooldown and Depressurization is successful; Offsite AC power is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Offsite AC power is recovered within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />; Core uncovery occurs within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
j 3
SBOS10 4.76E-06 7.7%
Station Blackout Initiating Event Occurs; RCS Cooldown and Depressurization is successful; Offsite AC power is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Offsite AC power is not recovered within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
4 SBOS26 3.89E-06 63 %
Station Blackout Initiating Event Occurr; Auxiliary Feedwater System Fails; Offsite AC po ver is not recovered within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.
5 CCWS08 3.64E-06 5.9%
Loss of Component Cooling Water Initiating Event Occurs; RCS Cooldown and Depressunzation is successful; CCW recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery occurs within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
6 LLOS02 3.62E-06 5.8%
Large LOCA Initiating Event Occurs; Low Pressure Recirculation function fails.
7 MLOS03 3.02E-06 4.9%
Medium LOCA Initiating Event Occurs; High Pressure Safety injection function is successful; High Pressure Recirculation Function fails; RCS Cooldown and Depressurization is successful; Low Pressure Recirculation function fails.
8 SWSS06 2.07E-06 33%
Loss of All Service Water Initiating Event Occurs; RCS Cooldown and Depressurization is successful; Service Water recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery occurs within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
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i Attachment to ET 96-0034 i
Page 57 of 69 1
TABLE 8 (Continued).
i Core Damage Sea'uences i
Sequence Sequence Percent
'I N amber Identdier Freamency f/vr)
Coatnbution Sequence Desenption 9
ATWS06 1.87E-06 3.0%
ATWS Event Occurs Following a Transient Initiator; Reactor power level greater than 40 percent; Manual trip by opening the RDMG breakers successful; AMSAC System actuation successful; Pressurizer Safety Valve (s) i fail to reciose.
10 LLOS03 1.69E-06 2.7%
Large LOCA Initiating Event Occurs; Low Pressure Safety Injection function ~
fails.
1I LSPSO4 1.36E-06 2.2%
Loss of Offsite Power Initiating Event Occurs; Auxiliary Feedwater System fails; Bleed portion of the Feed and Bleed function fails.
12 RCPS14 1.28E-06 2.1%
Loss of RCP Seal Cooling Event Occurs Following a Transient initiator; RCS
~f Cooldown and Depressunzation successful; CCW recovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> fails; i
Alternate cooling to the CCPs and S1 Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is successful; Core i
uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS inventory restoration function fails; Low Pressure Safety injection function fails.
13 TRAS05 1.23E-06 2.0%
Transient With Power Conversion System Available Initiating Event Occurs; l
Auxiliary Feedwater System fails; Main Feedwater Restoration fails; Bleed i
portion of Feed and Bleed function fails.
l 14 SLOS03 1.21E-06 2.0%
Small LOCA Initiating Event Occurs; RCS Cooldown and Depressunzation per
[
EMG ES-11 fails; High Pressure Recirculation function fails.
15 TROS04 1.01 E-06 1.6%
Transient Without Power Conversion System Available Initiating Event Occurs; Auxiliary Feedwater System fails; Bleed portion of Feed and Bleed function fails.
16 SWSS24 9.56E-07 1.5%
~ Loss of All Service Water Initiating Event Occurs; Auxiliary Feedwater System -
fails; Service Water is not recovered within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.
17 FLNS02 8.93E-07 1.4%
Non-Recoverable ESF Switchgear Rooms Floods Occur.
2.
L l
I i
I I
~. _
Attochment to ET 96-0034 Page 58 of 69 TABLE 8 (Continued)
Core Damage Seauences Sequence Sequence Percent Number Identifier Freauency #vr)
Contribution Seauence Description 18 RCPSIS 8.65E-07 1.4 %
Loss of RCP Seal Cooling Event Occurs Following a Transient initiator; RCS Cooldown and Depressurization successful; CCW recovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> fails; Alternate cooling to the CCPs and St Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is successful; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> occurs.
19 SWSS05 7.50E-07 1.2%
Loss of All Service Water Initiating Event Occurs; RCS Cooldown and Depressurization successful; Service Water is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS inventory restoration function fails.
20 RCPS61 7.31E-07 1.2%
Loss of RCP Seal Cooling Event Occurs Following a Transient Initiator; Auxiliary Feedwater System fails; Main Feedwater Restoration fails; CCW recovery within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> fails.
21 SBOS03 7.14E-07 1.2%
Station Blackout initiating Event Occurs; RCS Cooldown and Depressurization successful; Offsite AC power recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS inventory restoration function fails.
22 SBOS02 6.05E-07 1.0%
Station Blackout initiating Event Occurs; RCS Cooldown and Depressurization successful; Offsite AC power recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS inventory restoration function successful; High Pressure Recirculation function fails.
23 SLRSl7 5.88E-07 0.9%
Loss of RCP Seal Cooling Event With at least One CCW Train Available Occurs; High Pressure Safety injection function fails; RCS Cooldown and
~
Depressurization is successful; Low Pressure Safety injection function fails.
24 SBOS24 5.41E-07 0.9%
Station Blackout initiating Event Occurs; Auxiliary Feedwater System fails; Offsite AC power recovered within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />; Core uncovery within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> does not occur; High Pressure RCS inventory restoration function fails.
25 ATWSIS 4.98E-07 0.8%
ATWS Event Occurs Following a Transient initiator; Reactor power level greater than 40 percent; Manual trip by opening the RDMG breakers is successful; AMSAC System actuation fails.
.Attechment to ET 96-0034 Page 59 of 69 TABLE 8 (Continued)
Core Damage Sequences Sequence Sequence Percent Number Identifier Freauency Uvr)
Contribution Seauence Description 26 FL3S05 4.06E-07 0.7%
Control Building Basement Flood Occurs; RCS Cooldown and Depressurization is successful; Service Water is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS inventory restoration function fails.
27 SGRS05 3.92E-07 0.6%
Steam Generator Tube Rupture Initiating Event Occurs; Auxiliary Feedwater System successful; High Pressure Safety Injection function successful; Isolation of ruptured Steam Generator is successful; RCS and ruptured Steam Generator Pressure stabilization before overfill fails; Main steam relief valve (s) fail to reclose; RCS and Steam Generator Cooldown and Depressurization per EMG C-31/32 fails.
28 ATWS11 3.26E-07 0.5%
ATWS Event Occurs Following a Transient Initiator; Reactor power level is greater than 40 percent; Manual trip by opening the RDMG breakers is successful; AMSAC System actuation successful; Auxiliary Feedwater from 3 of 3 AFW pumps fails; Auxiliary Feedwater from 2 of 2 MDAFW Pumps or the TDAFW pump is successful; Pressurizer Safety Valve (s) fail to reclose.
29 VEFS02 3.00E-07 0.5%
Vessel Failure or Equivalent LOCA initiating Event Occurs.
i 30 SWSSII 2.96E-07 0.5 %
Loss of All Service Water Initiating Event Occurs; RCS Cooldown and Depressurization successful; Service Water is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Alternate cooling to CCPs and SI Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> fails.
31 CCWSl4 2.91E-07 0.5%
Loss of Component Cooling Water Initiating Event Occurs; RCS Cooldown and Depressurization is successful; CCW is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Alternate cooling to CCPs and S1 Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is successful; Core uncovery occurs within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
Attechment to ET 96-0034 Page 60 of 69 TABLE 8 (Continued)
Core Damage Sequences Sequence Sequence Percent
) Number Identifier Freauenev Uvr)
Contributmn Secuence Description 32 CCWS03 2.87E-07 0.5%
Loss of Component Cooling Water Initiating Event Occurs; RCS Cooldown and Depressurization is successful; CCW is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function is successful; High Pressure Recirculation function fails; Refill of the RWST fails.
33 FL3S22 2.83E-07 0.5%
Control Building Basement Flood Occurs, Auxiliary Feedwater System fails; Service Water is recovered within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />; Core uncovery within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> does not occur; RCS inventory restoration function fails.
34 ATWS14 2.63 E-07 0.4 %
ATWS Event Occurs Following a Transient Initiator; Reactor power level is greater than 40 percent; Manual trip by opening the RDMG breakers is successful; AMSAC System actuation successful; Auxiliary Feedwater from 3 of 3 AFW pumps fails; Auxiliary Feedwater from 2 of 2 MDAFW Pumps or the TDAFW pump fails.
35 SWSS10 2.55E-07 0.4%
Loss of All Service Water Initiating Event Occurs; RCS Cooldown and Depressurization successful; Service Water is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Alternate cooling to CCPs and SI Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is successful; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> occurs.
36 RCPS17 2.55E-07 0.4%
Loss of RCP Seal Cooling Event Occurs Following a Transient Initiator; RCS Cooldown and Depressurization is successful; CCW recovery within 8
' hours fails; Alternate cooling to CCPs and SI Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> fails; Low Pressure Safety injection function is successful; Refill of the RWST fails.
37 SGRS07 2.10E-07 0.3%
Steam Generator Tube Rupture Initiating Event Occurs; Auxiliary Feedwater System successful; High Pressure Safety Injection function successful; Isolaticn of ruptured Steam Generator fails; RCS and Steam Generator Cooldown and Depressurization per EMG C-31/32 fails.
f Attachment to ET 96-0034 Pagn 61 of 69 TABLE 8 (Continued)
Core Damage Sequences Sequence Sequence Percent Number Identifier Freauenev Uvr)
Contribution Seauence Descrintion 38 TROS03 1.61 E-07 0.3%
Transient Without Power Conversion System Available Initiating Event Occurs; Auxiliary Feedwater System fails; Feed and Bleed function is successful; High Pressure Recirculation function fails.
39 FL3S06 1.57E-07 0.3 %
Control Building Basement Flood Occurs; RCS Cooldown and Depressurization is successful; Service Water is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> occurs.
40 SWSSO9 1.55E-07 0.3%
Loss of All Service Water Initiating Event Occurs; RCS Cooldown and Depressurization is successful; Service Water is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Alternate cooling to CCPs and S1 Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is successful; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function fails.
41 RCPS18 1.55E-07 0.3%
Loss of RCP Seal Cooling Event Occurs Following a Transient Initiator; RCS Cooldown and Depressurization is successful; CCW recovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> fails; Alternate cooling to CCPs and S1 Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> fails; Low Pressure Safety injection function fails.
42 FLIS04 1.52E-07 0.2%
Turbine Building Flood Occurs; Auxiliary Feedwater System fails; Bleed portion of Feed and Bleed function fails.
43 SWSS22 1.45E-07 0.2%
Loss of All Service Water Initiating Event Occurs; Auxiliary Feedwater System fails; Service Water is recovered within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />; Core uncovery within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> does not occur; RCS Inventory Restoration function fails.
44 TRAS04 1.33E-07 0.2%
Transient With Power Conversion System Available Initiating Event Occurs; Auxiliary Feedwater System fails; Main Feedwater Restoration fails; Feed and Bleed function is successful; High Pressure Recirculation function fails.
45 VLOS07 1.23 E-07 0.2%
Very Small LOCA Initiating Event Occurs; High Pressure Safety Injection function fails; RCS Cooldown and Depressurization is successful; Low Pressure Safety Injection function fails.
m Attachment to ET 96-0034 PIga 62 of 69 TABLE 8 (Continued)
Core Damage Seanences Sequence Sequence Percent Number Identifier Freauency Uvr)
Contribution Scauence Description 46 SGRSl7 1.2 IE-07 0.2 %
Steam Generator Tube Rupture Initiating Event Occurs; Reactor Trip function fails (ATWS occurs - Core Damage Assumed).
47 ATWS05 1.13E-07 0.2%
ATWS Event Occurs Following a Transient Initiator; Reactor power level is greater than 40 percent; Manual trip by opening the RDMG breakers is successful; AMSAC System actuation is successful; Auxiliary Feedwater from 3 of 3 AFW pumps is successful; Pressurizer Safety Valves successfully reclose; Long Term Shutdown function fails.
48 FL3S24 1.10E-07 0.2%
Control Building Basement Flood Occurs; Auxiliary Feedwater System fails; Service Water is not recovered within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.
49 SBOS08 1.10E-07 0.2 %
Station Blackout Initiating Event Occurs; RCS Cooldown and Depressurization is successful; Offsite AC power is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Offsite AC power is not recovered within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />; Core uncovery within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> does not occur; High Pressure RCS inventory restoration function fails.
50 SWSS17 1.07E-07 0.2%
Loss of All Service Water Initiating Event Occurs; RCS Cooldown and Depressurization function fails; Service Water is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
51 FL3SO9 9.67E-08 0.2%
Control Building Basement Flood Occurs; RCS Cooldown and Depressurization is successful; Service Water is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Altemete cooling to CCPs and SI Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is successful; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function fails.
52 LSPS03 9.27E-08 0.1%
Loss of Offsite Power Initiating Event Occurs; Auxiliary Feedwater System fails; Feed and Bleed function is successful; High Pressure Recirculation function fails.
53 FL3Si1 8.57E-08 0.1%
Control Building Basement Flood Occurs; RCS Cooldown and Depressurization is successful; Service Water is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Altemate cooling to CCPs and SI Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> fails.
Attachment to ET 96-0n34 Pag 3 63 of 69 TABLE 8 (Continued)
Core Damage Seouences Sequence Sequence Percent Number Identifier Frequency Uvr)
Contribution Scauence Description 54 SWSS23 8.53E-08 0.1%
Loss of All Service Water Initiating Event Occurs; Auxiliary Feedwater System fails; Service Water is recovered within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />; Core uncovery within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> occurs.
55 FLiS03 8.01 E-08 0.1%
Turbine Building Flood Occurs; Auxiliary Feedwater System fails; Feed and Bleed function is successful; High Pressure Recirculation function fails.
56 CCWS22 7.44E-08 0.1%
Loss of Component Cooling Water Initiating Event Occurs; RCS Cooldown and Depressurization fails; CCW is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> occurs.
57 ISLS02 6.11E-08 0.1%
Interfacing Systems LOCA Initiating Event Occurs.
58 SLRS16 5.92E-08 0.1%
Loss of RCP Seal Cooling Event With at Least One CCW Train Available Occurs; High Pressure Safety Injection function fails; RCS Cooldown and Depressurization is successful; Low Pressure Safety Injection function is successful; Low Pressure Recirculation function fails.
59 RCPS08 5.70E-08 0.1%
Loss of RCP Seal Cooling Event Occurs Following a Transient Initiator; RCS Cooldown and Depressurization is successful; CCW is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core Uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function fails; Low Pressure Safety Injection function fails.
60 SGRS15 5.28E-08 0.1%
Steam Generator Tube Rupture Initiating Event Occurs; Auxiliary Feedwater System fails; Bleed portion of Feed and Bleed function fails.
61 SBOS14 5.24E-08 0.1%
Station Blackout Initiating Event Occurs; RCS Cooldown and Depressurization fails; Offsite AC power is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> occurs.
62 SLRS06 5.24 E-08 0.1%
Loss of RCP Seal Cooling Event With at Least One CCW Train Available Occurs; High Pressure Safety Injection function is successful; Auxiliary Feedwater System is successful; RCS Cooldown and Depressurization per EMG ES-11 fails; High Pressure Recirculation function fails; RCS Cooldown and Depressurization fails.
m Attochment to ET 96-0034 Page 64 of 69 TABLE 8 (Continued)
Core Damage Sequences Sequence Sequence Pereent Number Identifier Freauency Uvr)
Contnbution Scauence Descrintion 63 TROS05 5.21E-08 0.1%
Transient Without Power Conversion System Available Initiating Event Occurs; Auxiliary Feedwater System fails; Feed portion of Feed and Bleed function fails.
64 SLBS05 4.54E-08 0.1%
Steamline/Feedline Break Initiating Event Occurs; liigh Pressure Safety Injection function is successful; Isolation of faulted steam generator is successful; Auxiliary Feedwater System fails; Bleed portion of Feed and Bleed function fails.
65 SBOS25 4.50E-08 0.1%
Station Blackout Initiating Event Occurs; Auxiliary Feedwater System fails; Offsite AC power is recovered within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />; Core uncovery within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> occurs.
66 SWSS16 4.11 E-08 0.1%
Loss of All Service Water Initiating Event Occurs; RCS Cooldown and Depressurization function fails; Service Water is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> occurs.
67 SBOS20 3.74E-08 0.1%
Station Blackout initiating Event Occurs; RCS Cooldown and Depressurization function fails; Offsite AC power is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Offsite AC power is not recovered within 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />.
68 TRAS06 3.43E-08 0.1%
Transient With Power Conversion System Available Initiating Event Occurs; Auxiliary Feedwater System fails; Main Feedwater Restoration fails; Feed portion of Feed and Bleed function fails.
69 SBOS19 3.28E-08 0.1%
Station Blackout Initiating Event Occurs; RCS Cooldown and Depressurization function fails; Offsite AC power is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Offsite AC power is recovered within 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />; Core uncovery within 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> occurs.
Attachment to ET S6-0034 Pagn 65 of 69 TABLE 8 (Continued)
Core Damage Seauences l
Sequence Sequence Percent Number Identifier Freauency Uvri Contribution Seouence Description 70 SLRS05 3.22E-08 0.1 %
Loss of RCP Seal Cooling Event With at Least One CCW Train Available.
Occurs; High Pressure Safety Injection function is successful; Auxiliary Feedwater System is successful; RCS Cooldown and Depressurization per EMG ES-11 fails; High Pressure Recirculation function fails; RCS Cooldown and Depressurization is successful; Low Pressure Recirculation function fails; Refill of the RWST fails.
7i CCWS16 2.97E-08 0.0%
Loss of Component Cooling Water Initiating Event Occurs; RCS Cooldown and Depressurization is successful; CCW is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Alternate cooling to CCPs and SI Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> fails; Low Pressure Safety injection function is successful; Refill of the RWST fails.
72 DC4S08 2.91 E-08 0.0 %
Loss of Vital DC Bus NK04 Initiating Event Occurs; Reactor Trip function fails (ATWS occurs - Core Damage Assumed).
73 DCIS08 2.91E-08 0.0%
Loss of Vital DC Bus NK01 Initiating Event Occurs; Reactor Trip function fails (ATWS occurs - Core Damage Assumed).
74 SLOS12 2.75E-08 0.0*/.
Small LOCA initiating Event Occurs; High Pressure Safety injection function fails; RCS Cooldown and Depressurization is successful; Low Pressure Safety injection function is successfu'. Low Pressure Recirculation function fails.
75 CCWS21 2.35E-03 0.0%
Loss of Component Cooling Water Initiating Event Occurs; RCS Cooldown and Depressurization function fails; CCW is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function fails.
Attachment to ET 96-0034 Page 66 of 69 TABLE 8 (Continued)
Core Damage Seauences Sequence Sequence Percent Number Identifier Freauency Uyr)
Contribution Seamence Descrintion 76 SGRS03 2.35E-08 0.0 %
Steam Generator Tube Rupture Initiating Event Occurs; Auxiliary Feedwater System successful; High Pressure Safety injection function successful; Isolation of ruptured Steam Generator is successful; RCS and Steam Generator pressure stabilization before overfill fails; Steam Generator relief valves successfully reclose: RCS and Steam Generator pressure stabilization after overfill fails.
77 CCWSIO 234E-08 0.0%
Loss of Component Cooling Water Initiating Event Occurs; RCS Cooldown and Depressurization is successful; CCW is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Alternate cooling to CCPs and St Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is successful; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function is successful; Refill of the RWST fails.
78 FL3Sl7 2.25E-08 0.0%
Control Building Basement Flood Occurs; RCS Cooldown and Depressurization function fails; Service Water is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
79 RCPS26 2.17E-08 0.0%
Loss of RCP Seal Cooling Event Occurs Following a Transient initiator; RCS Cooldown and Depressurization function fails; CCW is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Alternate cooling to CCPs and St Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is successful; Core Uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function fails.
80 SLOS13 2.02E-08 0.0 %
Small LOCA Initiating Event Occurs; High Pressure Safety injection function fails; RCS Cooldown and Depressurization is successful; Low Pressure Safety Injection function fails.
81 MLOSO4 2.01E-08
- 0.0%
Medium LOCA Initiating Event Occurs; High Pressure Injection function is successful; High Pressure Recirculation function fails; Auxiliary Feedwater System is successful; RCS Cooldown and Depressurization fails.
Attachment to ET 96-0034 Pagn 67 of 69 TABLE 8 (Continued)
Core Damage Sequences Sequence Sequence Percent Number Identifier Freauency Uvr)
Contribution Sea _uence Descrintion 82 RCPSI1 1.95E-08 0.0%
Loss of RCP Seal Cooling Event Occurs Following a Transient Initiator, RCS Cooldown and Depressurization is successful; CCW is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Alternate cooling to CCPs and S1 Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is successful; Core Uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function is successful; Refill of the RWST fails.
83 FL3S10 1.94E-08 0.0%
Control Building Basement Flood Occurs; RCS Cooldown and Depressurization is successful; Service Water is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Alternate cooling to the CCPs and St Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is successful; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> occurs.
84 ATWSIO 1.70E-08 0.0%
ATWS Event Occurs Following a Transient Initiator; Reactor power level is greater than 40 percent; Manual trip by opening the RDMG breakers is successful; AMSAC System actuation is successful; Auxiliary Feedwater from 3 of 3 AFW pumps fails; Auxiliary Feedwater from 2 of 2 MDAFW Pumps or the TDAFW pump is successful; Pressurizer Safety Valves successfully reclose; Long Term Shutdown function fails.
85 FL5S21 L63E-08 0.0%
Auxiliary Building Level 2026 Flood Occurs; RCS Cooldown and Depressurization function fails; CCW is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function fails.
86 FL3S15 1.60E-08 0.0%
Control Building Basement Flood Occurs; RCS Cooldown and Depressurization function fails; Service Water is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function fails.
87 DCIS03 1.56E-08 0.0%
Loss of Vital DC Bus NK01 Initiating Event Occurs; Auxiliary Feedwater System fails; Feed and Bleed function is successful; High Pressure Recirculation function fails.
88 DC4S03 1.54E-08 0.0%
Loss of Vital DC Bus NK04 Initiating Event Occurs; Auxiliary Feedwater
.. ~ _ _ _..
Atta.chment to RT 96-0034 Pr.ga 68 of 69 TABLE 8 (Continued)
Core Damage Sequences Sequence Sequence Percent Numiber identifier Freg; cv Uvr)
Contribution Sequence Description System fails; Feed and Bleed function is successful; High Pressure Recirculation function fails.
89 SLRS14 1.48E-08 0.0%
Loss of RCP Seal Cooling Event With at Least One CCW Train Available -
Occurs; High Pressure Safety injection function is successful; Auxiliary
~ Feedwater System fails; Restoration of Main Feedwater fails; Bleed portion of RCS Feed and Bleed function fails.
90 PRVS03 1.44E-08 0.0%
Stuck Open/Unisolatable Pressunzer PORV Occurs Following a Transient initiator; High Pressure Safety injection function is successful; Auxiliary Feedwater System is successful; High Pressure Recirculation function fails; RCS Cooldown and Depressurization function is successful; Low Pressure Recirculation function fails.
91 SWSS08 1.44E-08 0.0%
Loss of All Service Water Initiating Event Occurs; RCS Cooldown and Depressurization function is successful; Service Water is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Akemate cooling to the CCPs and St Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is successful; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function is successful; Refill of the RWST fails.
92 SBOS22 1.28E-08 0.0%
Station Blackout Initiating Event Occurs; Auxiliary Feedwater System fails; Offsite AC power is recovered within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />; Core uncovery within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> does not occur; High Pressure RCS Inventory Restoration function is successful; High Pressure Recirculation function fails.
i 93 LLOSO4 1.17E-08 0.0%
Large LOCA Initiating Event Occurs; Accumulator Safety injection function fails.
l r
m
=.
Attachment to ET 96-0034 Pags 69 of 69 TABLE 8 (Continued)
H Core Damage Seauences Sequence Sequence Percent i
Number Identifier Freauency Uyr)
Contributen Seauence Descrintion 94 SBOS23 1.08E-08 0.0%
Station Blackout Initiating Event Occurs; Auxiliary Feedwater System fails; Offsite AC power is recovered within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />; Core uncovery within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> does not occur; Bleed portion of High Pressure RCS Inventory Restoration function fails.
95 FL5S08 1.05E-08 0.0%
Auxiliary Building Level 2026 Flood Occurs; RCS Cooldown and Depressurization is successful; CCW is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> occurs.
FL3S08 1.04E-08 0.0%
Control Building Basement Flood Occurs; RCS Cooldown and Depressurization is successful; Service Water is not recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Alternate cooling to CCPs and S1 Pumps within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is successful; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function is successful; Refill of the RWST fails.
97 SWSSO4 1.03E-08 0.0%
Loss of All Service Water Initiating Event Occurs; RCS Cooldown and Depressurization function is successful; Service Water is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function is successful; High Pressure Recirculation function fails; Low Pressure Recirculation function fails; Refill of the RWST fails.
98 SWSSIS 1.03E-08 0.0%
Loss of All Service Water Initiating Event Occurs; RCS Cooldown and Depressurization function fails; Service Water is recovered within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; Core uncovery within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> does not occur; RCS Inventory Restoration function fails.
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