ML17146A206
| ML17146A206 | |
| Person / Time | |
|---|---|
| Issue date: | 05/26/2017 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shilp Vasavada 301-415-1228 | |
| Shared Package | |
| ML17146A194 | List: |
| References | |
| Download: ML17146A206 (4) | |
Text
Approach and variable names based on NEI 05-01 (ML060530203)
Discount Rate (%);From NUREG/BR-0058, Revision 5 (Draft)
(ML15336A003) 7 Seismic CDF (mean value) 1.00E-05 Dollars/person-rem ($); From NUREG-1530, Revision 1 (ML15237A211) 5489 Seismic CDF (95th percentile) 1.00E-05 No. of units 2
Seismic LERF (mean value) 1.00E-06 Plant Notional Plant X Seismic LERF (95th percentile) 1.00E-06 OFF-SITE EXPOSURE COST ON-SITE EXPOSURE COST MIN. COST OF MODIFICATION
$100,000 Immediate Analysis period (yrs) 40.00 Immediate on-site dose (per-rem/event); from NUREG/BR-0184 3300 MAX. AVERTED COST-RISK (MACR)
$554,562 C
13.42 Analysis period (yrs) 40.00 RRW THRESHOLD (RRW_CDFTH) 1.220 Mean annual off-site dose impact (person-rem/yr) 1.00 C
13.42 Z_pha ($)
5489.00 TARGET RRW FOR >= 1E-5/YR CHANGE IN SCDF (INDIVIDUALLY OR COMBINED) - USING MEAN SCDF 2.00 W_pha 73645.91 W_IO_seismic ($/yr) 2430.31 TARGET RRW FOR >= 1E-6/YR CHANGE IN SLERF (INDIVIDUALLY OR COMBINED) - USING MEAN SLERF 2.00 Long term TARGET RRW FOR >= 1E-5/YR CHANGE IN SCDF (INDIVIDUALLY OR COMBINED) - USING 95TH SCDF 1.10 Long term on-site dose (per-rem/event);
from NUREG/BR-0184 20000 TARGET RRW FOR >= 1E-6/YR CHANGE IN SLERF (INDIVIDUALLY OR COMBINED) - USING 95TH SLERF 2.00 OFF-SITE ECONOMIC COST Analysis period (yrs) 40.00 C
13.42 Analysis period (yrs) 40.00 Long-term dose accrual duration (yrs) 10 C
13.42 Mean annual off-site economic impact
($)
1000.00 W_LTO_seismic ($/yr) 10592.69 W_pha 13,417 Total on-site exposure cost_seismic
($/yr) 13,023 ON-SITE ECONOMIC COST Cleanup and Decontamination Cleanup and decont cost ($); from BR-0184 2.54E+09 Long-term dose accrual duration (yrs) 10 PV_CD 1.83E+09 Analysis period (yrs) 40.00 C
13.42 U_CD ($-year) 2.45E+10 Cost per year_seismic ($)
2.45E+05 Replacement Power Cost Replacement power cost for 910 Mwe
($/yr); from BR-0184 1.20E+08 Reactor power (MWe) 1000 Replacement power costs ($/yr) 1.32E+08 Analysis period (yrs) 40.00 PV_RP 1.66E+09 U_RP ($-year) 2.09E+10 Cost per year_seismic ($)
2.09E+05 Total on-site economic cost_seismic 4.54E+05
Plant Mean annual off-site dose impact (per-rem/yr)
Mean annual off-site economic impact ($/yr)
Reference Analysis period (yr);
Reference Reactor power (MWe)
Reference Diablo Canyon 8.79 33700 7
1106 Indian Point 24.5 52800 3
1080 Summer 1
2739 24 950 Peach Bottom 15 51700 16 1370 Sequoyah 45 97000 23 1199 DC Cook 42.5 64582 19 1117 Vogtle 1.54 1750 29 1250 Watts Bar 19.2 5692 37 1160 Beaver Valley 57.9 323000 29 1014 Callaway 4.6 20800 26 1284 Pilgrim 13.6 45900 14 734 North Anna 7.5 13400 22 980 Oconee 5
10000 16 887 Columbia 2.34 51100 25 1190 Robinson 5.84 9530 12 800 Dresden 10.23 18410 13 957 Palisades 31.9 124974 13 835 Browns Ferry 2.54 5082 18 1101 Notional Plant X 1
1000 40 1000 Source for MWe is Chapter 1 of plant-specific FSAR unless otherwise noted in a comment; The net MWe value is used where a differentiation between net and gross is made in the FSAR; For multi-unit sites with different power outputs the maximum of the two values is used.
Source for mean annual offsite dose impact and mean annual offsite economic impact identified on Source Material webpage by plant Source for end of operating license obtained from https://www.nrc.gov/info-finder/reactors/
For multi-unit sites the last opearting license expiration is used. Visit the source webpage and modify the appropriate cell if separate expiration dates are required for multi-unit sites.
Final determination Change to SCDF DC 14 Low magnitude seismic event in which AFW fails due to operator error to (1) switch to an alternate source of water given CST and RWR are unavailable, and (2) initiate feed and bleed after AFW failure.
1.008 1.155 Automating feed and bleed Primary system Screened based on implementation cost greater than MACR.
NA NA
$11,435,616 DC 18 Failure of all vital 4KV AC power given that the turbine building does not fail. 230KV offsite supply also failed resulting in LOSP.
Recovery based on 4KV may not be possible.
1.010 1.141 Install and use an alternate 480V AC generator to supply battery chargers for long term AFW in conjuction with self-cooled 480V AC RCP seal injection pump Electrical system DC 18 Failure of an EDG (random) in combination with seismically induced LOOP and failure of other two EDGs resulting in an SBO.
1.010 1.141 Install and use an alternate 480V AC generator to supply battery chargers for long term AFW in conjuction with self-cooled 480V AC RCP seal injection pump EDG DC 19 Failure of operators to reset seismic relay chatter given a seismically induced LOOP resulting in on-site AC sources not being aligned to required loads.
1.012 1.039 Replace critical relays with high-capacity relays Electrical system Screened based on implementation cost greater than MACR.
NA NA
$15,312,096 DC 20 Failure to depower control rods after plant trip caused by failure of breakers to change state combined with operator error to de-energize the RPS bus 1.042 1.043 Use an alternate signal to automate the de-energinzation of the 480V busses feeding the rod drive MG sets DC 20 Failure of one train of solid state protection system combined with breaker failures leading to ATWS events 1.020 1.030 Use an alternate signal to automate the de-energinzation of the 480V busses feeding the rod drive MG sets DC 3
Seismic failure of 125V DC power combined with LOOP resulting in SBO scenarios because DC power is required for on-site power alignment 1.009 1.027 Install and use an alternate DC generator to either power critical DC buses or to directly power critical DC equipment. Generator should be installed in a seismically qualified area.
Electrical system Retained for Phase 2 Not cost beneficial None (0%)
$5,863,176 DC 9
Failure of feed and bleed due to loss of power to one PORV and loss of instrument air to the other during LOOP or SBO sequences.
Sequences include MD AFW failures due to power dependencies and eventual failure of TD AFW 1.008 1.010 Install nitrogen bottles as backup air supply for one PORV to support feed and bleed Primary system Retained for Phase 2 Not cost beneficial Small (0.5%)
$1,692,730 DC 6
Loss of AFW due to hardware failures and/or power dependencies 1.011 1.014 Install and use high pressure, engine-driven secondary side makeup pump.
Pump should be installed in a seismically qualified area and requires assurance that pump and piping can be Secondary system Screened based on implementation cost greater than MACR.
NA NA
$14,475,422 DC 22 Failure of one channel of emergency activation signal given failure of another channel resulting in no automatic actuation.
1.009 1.010 Install redundant means of actuating AFW on low SG level Secondary system Retained for Phase 2 PRA model refined to simulate multiple signals resulting in low RRW NA NA DC 23 High magnitude (bin 4; 2-2.5g) seismic failure of SG supports resulting in a postulated failure of the RCS and steam connected piping. Containment also assumed to fail due to postulated high containment pressure 1.009 1.009 Reinforce SG support structures to increase likelihood of survival under high magnitude earthquakes Anchorage/Supports Screened based on implementation cost greater than MACR.
NA NA
$83,990,400 NA NA Install adequate seismic support for the fire protection piping including deluge valve station in control building Anchorage/Supports Implemented as part of post-IPEEE actions Cost beneficial NA NA 1.174 1.174 Install flood alarm in 480V AC switchgear room Miscellaneous Retained for Phase 2 Cost beneficial NA
$196,800.00 IP3 225 Spurious operation of the EDG room CO2 system during a seismic event and subsequent shutdown of the EDG ventilation system NA NA Install seismically qualified (class I) actuation permission auxiliary control panel for CO2 discharge into the EDG building to prevent spurious operation Electrical system Implemented as part of post-IPEEE actions Cost beneficial NA NA IP2 NA Loss of CCW due to CCW surge tank structural failure during seismic event 1.273 1.273 Upgrade CCW surge tank hold-down bolts Anchorage/Supports Implemented as part of post-IPEEE actions Cost beneficial Large (27%)
NA Mount or anchor the MCCs to the respective building walls Install shear pins (or strength bolts) in the AFW pumps Identify and remove unsecured equipment near areas that contain relays that actuate, so area is kept clear.
Properly position chain hoists that facilitate maintenance on pumps within pump rooms and institute a training program to ensure that the hoists are properly positioned when not in use.
Secure floor grating to prevent damage to sensing lines due to differential building motion.
Replace MCC anchorages Upgrade RHR heat exchanger anchorages BV1 167 Failure of batteries due to seismic induced failure of battery room block walls 1.154 1.154 Increase the seismic ruggedness of the emergency 125V DC battery block walls Anchorage/Supports Retained for Phase 2 Cost beneficial Large (15%)
$300,000.00 NA SEQ NA Failure of components due to insufficient or improper anchorage NA NA Anchorage/Supports Implemented as part of post-IPEEE actions Cost beneficial NA Anchorage/Supports Implemented as part of post-IPEEE actions Cost beneficial NA NA CAL NA Failure of components due to insufficient or improper anchorage NA NA IP3 219 Loss of 480V AC supply due to flooding in 480V AC switchgear room from seismically induced fire protection system piping and deluge valve failures Retained for Phase 2 Not cost beneficial Small (1.6%)
$6,441,418 Electrical system Screened based on implementation cost greater than MACR.
NA NA
$7,526,832 Cost of implementation Phase 2 Results Plant ID SAMA #
BE/Impact Description RRW-min RRW-max Potential Modification Modification Category Phase 1 Results
BV1 and BV2 187 for BV1 and 186 for BV2 Failure of EDG due to seimsic structural failure of EDG battery rack 1.149 1.149 Increase seismic ruggedness of the diesel substation batteries. This applies to the battery rack only and not the entire structure.
Anchorage/Supports Retained for Phase 2 Cost beneficial Large (15%)
$300,000.00 PALI 9
Random failures of EDG 1-2, AFW pump 8C, and the ADVs to close were identified as imporant in the Palisades seismic analysis NA NA Provide capability to cross-tie 2.4kV AC buses from the MCR and update procedures Electrical system Screened based on cost greater than MACR NA NA
$6,000,000 PALI 22 Undervoltage relays that automatically start EDG 1-2 could fail during a seismic event NA NA Repalce the undervoltage relays for buses 1C and 1D with seismically qualified model Electrical system Retained for Phase 2 Cost beneficial NA
$55,000 per relay DCC 83 High seismic SBO risk due to failure of diesel oil cooler anchor bolts NA NA Replace anchor bolts on diesel generator oil cooler Anchorage/EDG Screened based on not applicable NA NA NA DCC 181 Failure of the 4160/600 VAC transformers caused by seismically induced failure of the walls NA NA Improve seismic capacity of walls near 4160/600 VAC transformers Anchorage/Supports Implemented as part of design changes Cost beneficial NA NA DCC 182 Seismically induced failure of the EDG fuel oil day tanks contributed approximately 20% of seismic CDF NA NA Improve seismic capacity of the EDG fuel oil day tanks EDG Implemented as part of design changes Cost beneficial NA NA DCC 183 Failure of the steel structure supporting the auxiliary building would lead to collapse of the building NA NA Reinforce the seismic capacity of the steel structure supporting the auxiliary building Anchorage/Supports Screened based on implementation cost greater than bounding benefit NA NA
> $2,700,000 OC NA Seismic initiator plant damage states were considered for SAMAs NA NA Increase seismic ruggedness of many plant components/systems Systems/Components Screened based on implementation cost greater than bounding benefit NA NA
$51,000 VCS 83 Integral basemat NA NA Improve containment and system survivability for seismic events Containment/Systems Screened based on implementation cost greater than MACR NA NA
> $1,203,380 VCS 111 High seismic SBO risk due to failure of diesel oil cooler anchor bolts NA NA Replace anchor bolts on diesel generator oil cooler Anchorage/EDG Implemented and assessed as part of IPEEE with current restraints considered sufficient NA NA NA VCS 157 Seismic event induced internal flooding 1.000 1.000 Shield electrical equipment from potential water spray Electrical system Retained for Phase 2 Not cost beneficial NA NA VCS 243 Necessary plant equipment could be unavailable during and after seismic events NA NA Increase seismic ruggedness of many plant components/systems Misc Partially implemented as part of post-IPEEE actions. Cost to increase seismic ruggedness of all components exceeded MACR NA NA NA VCS 246 Spurious fire supression system actuation due to seismic event NA NA Replace mercury switches on fire portection systems Fire protection system Partially implemented as part of post-IPEEE actions NA NA NA VCS 247 Seismic event impacting availability of fire protection system NA NA Provide additional restraints for CO2 tanks Anchorage/Supports Partially implemented as part of post-IPEEE actions NA NA NA VCS 260 CST may not be available following a seismic event NA NA Addressed in SAMA 164 (install new condensate storage tank)
Secondary system Addressed at VCSNS NA NA NA COL SR-01 Necessary plant equipment could be unavailable during and after seismic events NA NA Increase seismic ruggedness of SSW pumps and RHR heat exchangers Secondary system Evaluated qualitatively with no futher evaluation on the basis of low benefit NA NA NA COL SR-02 Seismic event may impact availability of fire protection NA NA Provide additional restraints for CO2 tanks Fire protection system Implemented as part of post-IPEEE actions NA NA NA COL SR-03 CST may not be available following a seismic event NA NA Modify safety related CST Secondary system Retained for Phase 2 Not cost beneficial 0
$980,000 COL SR-04 Diesel generators may not be available following a seismic event NA NA Replace anchor bolts on diesel generator oil cooler Anchorage/EDG Implemented at CGS and not identified by IPEEE as a seismic vulnerability NA NA NA HBR 111 High seismic SBO risk due to failure of diesel oil cooler anchor bolts NA NA Replace anchor bolts on diesel generator oil cooler Anchorage/EDG No changes identified by IPEEE NA NA NA HBR 157 Seismic event could induce internal flooding NA NA Shield electrical equipment from potential water spray Electrical system Implemented cost effective means identified by IPE NA NA NA HBR 243 Necessary plant equipment could be unavailable during and after seismic events NA NA Increase seismic ruggedness of plant components Misc Implemented cost effective means identified by IPEEE NA NA NA HBR 246 Spurious fire supression system actuation due to seismic event NA NA Replace mercury switches on fire portection systems Fire protection system Implemented cost effective means identified by IPEEE NA NA NA HBR 247 Seismic event impacting availability of fire protection system NA NA Provide additional restraints for CO2 tanks Anchorage/Supports Implemented cost effective means identified by IPEEE NA NA NA HBR 260 CST may not be available following a seismic event NA NA Addressed in SAMA 164 (install new condensate storage tank)
Secondary system Screened based on implementation cost greater than MACR NA NA
> $1,033,000 BF 76 High seismic SBO risk due to failure of diesel oil cooler anchor bolts NA NA Replace anchor bolts on diesel generator oil cooler Anchorage/EDG Screened based on seisic events are not a significant contributor to core damage NA NA NA
BF 114 Necessary plant equipment could be unavailable during and after seismic events NA NA Increase seismic ruggedness of plant components Misc Screened based on seisic events are not a significant contributor to core damage NA NA NA BF B18 Mitigate earthquake effects NA NA Strengthen structures and equipment Misc Screened based on seisic events are not a significant contributor to core damage NA NA
> $7,300,000 per unit DRE 83 Containment survivability could be questioned under severe seismic activity NA NA Improve containment survivability under severe seismic activity Containment/Systems Screened based on not applicable NA NA NA DRE 111 High seismic SBO risk due to failure of diesel oil cooler anchor bolts NA NA Replace anchor bolts on diesel generator oil cooler Anchorage/EDG No changes identified by IPEEE NA NA NA DRE 157 Seismic even could induce internal flooding NA NA Shield electrical equipment from potential water spray Electrical system Screened based on implementation cost greater than risk benefit NA NA NA DRE 239 Necessary plant equipment could be unavailable during and after seismic events NA NA Increase seismic ruggedness of plant components Misc Retained for Phase 2 Remain under investigation for resolution as part of closeout of IPEEE commitments NA NA DRE 248 CST may not be available following a seismic event NA NA Modify safety related CST Secondary system Screened based on implementation cost greater than risk benefit NA NA NA WB 140 Necessary plant equipment could be unavailable during and after seismic events NA NA Increase seismic ruggedness of plant components Misc Implemented as part of post-IPEEE actions NA NA NA WB 177 High seismic SBO risk due to failure of diesel oil cooler anchor bolts NA NA Replace anchor bolts on diesel generator oil cooler Anchorage/EDG No changes identified by IPEEE NA NA NA WB 212 Failure of the 4160/600 VAC transformers caused by seismically induced failure of the walls NA NA Improve seismic capacity of walls near 4160/600 VAC transformers Electrical system No changes identified by IPEEE NA NA NA WB 213 Seismically induced failure of the EDG fuel oil day tanks contributed approximately 20% of seismic CDF NA NA Improve seismic capacity of EDG fuel oil day tanks EDG Implemented as part of SQUG walkdowns to bring EDG up to 0.3g seismic margin NA NA NA WB 214 Failure of the steel structure supporting the auxiliary building would lead to collapse of the building NA NA Reinforce the seismic capacity of the steel structure supporting the auxiliary building Anchorage/Supports Screened based on implementation cost greater than bounding benefit NA NA NA PB 76 High seismic SBO risk due to failure of diesel oil cooler anchor bolts NA NA Replace anchor bolts on diesel generator oil cooler Anchorage/EDG Implemented as part of post-IPEEE actions NA NA NA PB 114 Necessary plant equipment could be unavailable during and after seismic events NA NA Increase seismic ruggedness of plant components Misc Implemented as part of post-IPEEE actions NA NA NA PB 130 Seismic event could induce internal flooding NA NA Shield electrical equipment from potential water spray Electrical system Modification already installed NA NA NA PB 131 Spurious fire supression system actuation due to seismic event NA NA Replace mercury switches on fire portection systems Fire protection system Implemented as part of post-IPEEE actions NA NA NA PB 132 Seismic event impacting availability of fire protection system NA NA Provide additional restraints for CO2 tanks Anchorage/Supports Implemented as part of post-IPEEE actions NA NA NA PB 156 CST may not be available following a seismic event NA NA Modify safety related CST Secondary system Retained for Phase 2 Not cost beneficial NA
> $1,000,000 x 2 NAPS 79 High seismic SBO risk due to failure of diesel oil cooler anchor bolts NA NA Replace anchor bolts on diesel generator oil cooler Anchorage/EDG Implemented/intent already met NA NA NA
Plant ID Plant Name Type of Information Source Location Link Comments No. of units Table F.5-1c Table F.5-3 Table F.6-1 Section E.1.3.1 Table E-2.1 Table E-2.2 CAL Callaway 2011 SAMA Table 5-1 CAL 2011 SAMA 1
SEQ Sequoyah 2013 SAMA Section E.1.3.1 SEQ 2013 SAMA 2
BV1 and BV2 Beaver Valley 1 and 2 2007 SAMA Table 7-1 BV 2007 SAMA 2
Table E.5-1 Table E.5-3 Table E.5-4 DCC DC Cook 2003 SAMA Table F.4-1 DCC 2003 SAMA 2
OC Oconee 1998 SAMA Table 6-1 (Attachment K)
OC 1998 SAMA 3
Table F.4-1 Table F.4-2 VOG Vogtle 2007 SAMA Table F.5-1 VOG 2007 SAMA Document says no seismic specific SAMAs identified 2
COL Columbia 2010 SAMA Table E.9-3 COL 2010 SAMA 1
HBR Robinson SAMA Table F-8 HBR SAMA 1
DRE Dresden 2003 SAMA Table F-1 DRE 2003 SAMA 2
WB Watts Bar 2010 SAMDA Table 16 WBU2 2010 SAMDA Unit 2 SAMDA used and assumed to be applicable to Unit 1 (SAMDA declared as non-public) 2 BF Browns Ferry 2002 SAMA Table V-2 BF 2002 SAMA Seismic events are not a significant contributor to core damage at BFN. No quantitative assessments of seismic-related SAMAs were evaluated.
3 Table G.4-1 Table G.4-2 NAPS North Anna 2002 SAMA Table G.2-1 NAPS 2002 SAMA 2
2 2
1 2
2 PB Peach Bottom 2001 SAMA PB 2001 SAMA Only two SAMAs were identified during the Palisades seismic analysis VCS VC Summer 2002 SAMA VCS 2002 SAMA PALI Palisades 2005 SAMA PALI 2005 SAMA DC Diablo Canyon 2009 SAMA DC 2009 SAMA+E2:E26 IP 2007 SAMA IP2 and IP3 Indian Point 2 and 3 2007 SAMA