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Category:Meeting Briefing Package/Handouts
MONTHYEARML23348A3572023-12-14014 December 2023 Application to Revise Technical Specifications to Use Online Monitoring Methodology Slides and Affidavit for Pre-Submittal Meeting ML23296A1002023-10-24024 October 2023 Entergy Presentation Slides for Pre-Submittal Meeting on 10/24/23, Mtc LAR ML22193A0262022-07-12012 July 2022 (ANO) RICT License Amendment Request TSTF-505 NRC Pre-Submittal Meeting Presentation - July 13, 2022 ML21351A0282021-12-16016 December 2021 Preliminary Information of ANO-1 1R17 (2002) Findings on CRDM Nozzle 56, and Presentation Slides for PT Exam of Nozzle 56 ML21348A1262021-12-14014 December 2021 RCP TS LAR Pre-Submittal Meeting Slides, December 16, 2021 ML21309A0622021-11-0909 November 2021 NRC Slides for November 9, 2021, Technology Inclusive Content of Application Project Public Meeting ML21312A0342021-11-0909 November 2021 Combined Slides for November 9, 2021, Technology Inclusive Content of Application Project Public Meeting ML21242A2792021-08-30030 August 2021 ANO Slides Presentation for 9-1-21 Public Meeting ML21200A1792021-07-31031 July 2021 Scale/Melcor Non-LWR Source Term Demonstration Project - High Temperature Gas-Cooled Reactor ML20344A0572020-12-10010 December 2020 Combined Industry and NRC Slides for the December 10, 2020, Public Meeting on Technology Inclusive Content of Application Project, Advanced Reactor Content of Application Project and Applicability of Regulations to Non-Light Water Reactors ML20315A1582020-11-17017 November 2020 Presentation Meeting Slides for the 11/17/20 Teleconference ML20269A3452020-09-28028 September 2020 Pre-submittal Meeting for Request for One-Time Exemption from 10 CFR Part 50, Appendix E, Biennial EP Exercise (Offsite) Due to COVID-19- Entergy Presentation Slides ML20255A0242020-09-11011 September 2020 (Ano), Pre-Submittal Meeting with NRC - Request to Extend Allowable Outage Time (AOT) for the Emergency Cooling Pond (ECP) ML20211L7052020-08-0404 August 2020 (ANO) Units 1 & 2, Pre-Submittal Slide Presentation for August 4, 2020 Public Meeting ML20114E2752020-04-29029 April 2020 (ANO) Carbon Fiber Reinforced Polymer (Cfrp) Relief Request Pre-Submittal Meeting with NRC - April 29, 2020 ML19136A2512019-06-13013 June 2019 Handout for the June 13, 2019 Pre-submittal Public Meeting for Planned License Amendment Request Regarding Fuel Handling Accident Analysis ML18176A1312018-06-21021 June 2018 Summary of Annual Assessment Meeting with Entergy Operations, Inc., Regarding 2017 Performance of Arkansas Nuclear One ML18107A3342018-04-10010 April 2018 Tech Spec 3.3.5.2a Change Pre-Submittal Meeting Presentation Slides ML18081A1922018-03-20020 March 2018 Presentation at the PRA Workshop ML17328A3652017-11-30030 November 2017 Workshop on Sharing Operating Experience from Rigging, Lifting and Load Handling Events - Temporary Overhead Crane Failure at Arkansas Nuclear One Presented to IAEA ML16109A3642016-04-18018 April 2016 Summary of Meeting to Discuss Supplemental Inspection Results and Annual Assessment Meeting with Entergy Operations Inc. Regarding 2015 Performance of Arkansas Nuclear One ML16015A0622016-01-20020 January 2016 Briefing Notes for 95003 Inspection at Arkansas Nuclear One ML15132A1752015-05-21021 May 2015 Summary of Annual Assessment Meeting with Entergy Operations Inc., Regarding ANO 2014 Performance ML14356A1852014-12-22022 December 2014 ANO2 Exit ML14329B2092014-11-25025 November 2014 Summary of Regulatory Conference to Discuss Safety Significance of Arkansas Nuclear One Flood Protection Deficiencies ML14259A5972014-09-16016 September 2014 Summary of Annual Performance Assessment Meeting for Arkansas Nuclear One Performance ML14169A0722014-06-19019 June 2014 Entergy Public Meeting Presentation Slides ML12332A1792012-11-26026 November 2012 Power Point Presentation by Entergy at the November 26, 2012 Meeting (TAC No. ME9706.) ML12306A2912012-11-0101 November 2012 Transmittal Email and WCAP-17128-NP, Revision 1, Flaw Evaluation of CE Design RCP Suction and Discharge Nozzle Dissimilar Metal Welds, Phase III Study, May 2010 ML12278A2552012-10-0909 October 2012 Licensee Slide Presentation, ANO-2 NFPA 805 Application, at the October 9, 2012, pre-submittal Meeting to Discuss the NFPA 805 Application ML12278A2532012-10-0909 October 2012 Licensee Handout, Design Input for Fire Risk Evaluation, at the 10/9/2012 Pre-submittal Meeting to Discuss the NFPA 805 Application ML12275A5492012-10-0101 October 2012 Summary of Meeting with Entergy Operations, Inc., to Discuss the Performance of the Subject Facilities, Recent Organizational Changes, and Current Regulatory Issues ML1218003412012-06-28028 June 2012 Handouts at the June 29, 2012 NFPA 805 Meeting at the Hq - Item #4 ML1218003192012-06-28028 June 2012 Handouts at the June 29, 2012 NFPA 805 Meeting at the Hq - Item #3 ML1218003122012-06-28028 June 2012 Handouts at the June 29, 2012 NFPA 805 Meeting at the Hq - Item #2, Table W-2 ANO-2 Fire Area Risk Summary ML1218003102012-06-28028 June 2012 Handouts at the June 29, 2012 NFPA 805 Meeting at the Hq - Item #1, Plant Modifications and Items to Be Completed ML1218003062012-06-28028 June 2012 Handouts at the June 29, 2012 NFPA 805 Meeting at the Hq - Power Point Slides ML12166A5602012-06-12012 June 2012 Licensee Presentation on June 12 & 13, 2012, Meeting License Amendment Request on NFPA 805 Adoption ML1202501112012-01-25025 January 2012 Licensee Slides Arkansas Nuclear One, Unit 1 - Steam Generators Tube to Tube Wear ML1126502692011-09-22022 September 2011 Licensee Handouts for 10/05/2011 Presubmittal Meeting ML1117906392011-06-28028 June 2011 Summary of Meeting with Entergy Operations Inc ML1110401532011-04-13013 April 2011 Licensee Slides from 4/13/11 Meeting with Entergy Operations, Inc., to Discuss Proposed National Fire Protection Programs Standards 805 License Amendment Submittal for Arkansas Nuclear One, Units 1 & 2 ML1107504262011-03-15015 March 2011 Licensee Slides from 3/15/11 Pre-Sumittal Meeting SWS Room Cooling Required Action ML1107504162011-03-15015 March 2011 Licensee Slides from 3/15/11 Meeting with Entergy Operations on Technical Specification Change - Testing of Idle RCS Cooling Loop ML1016705012010-06-17017 June 2010 Discussion of Screening Criteria - Arkansas Nuclear One (ANO) ML0935201272009-12-18018 December 2009 Nrc/Entergy Operations, Inc., Management Meeting ML0935005652009-12-15015 December 2009 NRC Handouts Current Status of Arkansas Nuclear One Unit Steam Generators, December 2009 ML0913104172009-05-11011 May 2009 Summary of Meeting with Entergy to Discuss Arkansas Nuclear One 2008 Performance ML0828000612008-10-0101 October 2008 Enclosure 3-Technical Papers 2 - Plant Application of Weld Onlay for Butt Weld Mitigation ML0828300322008-08-31031 August 2008 NRC Presentation Arkansas Nuclear One - Unit One 2023-12-14
[Table view] Category:Slides and Viewgraphs
MONTHYEARML23348A3572023-12-14014 December 2023 Application to Revise Technical Specifications to Use Online Monitoring Methodology Slides and Affidavit for Pre-Submittal Meeting ML23296A1002023-10-24024 October 2023 Entergy Presentation Slides for Pre-Submittal Meeting on 10/24/23, Mtc LAR ML23223A2032023-08-11011 August 2023 (ANO) Unit 1 Licensee'S Slide Presentation for 8/15/23 Public Meeting Pressurizer Heaters ML22193A0262022-07-12012 July 2022 (ANO) RICT License Amendment Request TSTF-505 NRC Pre-Submittal Meeting Presentation - July 13, 2022 ML22164A8012022-06-13013 June 2022 Entergy Fleet (GGNS, RBS, and WF-3) - Code Case N-752 RR 6-14-22 Pre-Submittal Public Meeting Presentation Slides ML22124A0692022-05-10010 May 2022 RVCH Penetration No. 1 Relief Request Public Meeting May 10, 2022 (EPID L-2022-LRM-0036) (Slides) ML21351A0282021-12-16016 December 2021 Preliminary Information of ANO-1 1R17 (2002) Findings on CRDM Nozzle 56, and Presentation Slides for PT Exam of Nozzle 56 ML21348A1262021-12-14014 December 2021 RCP TS LAR Pre-Submittal Meeting Slides, December 16, 2021 ML21319A2452021-11-15015 November 2021 Natrium Energy Island Decoupling Strategy - 11-17-2021 ML21312A0342021-11-0909 November 2021 Combined Slides for November 9, 2021, Technology Inclusive Content of Application Project Public Meeting ML21306A3162021-11-0909 November 2021 Digital IC Presentation 11/09/2021 ML21309A0622021-11-0909 November 2021 NRC Slides for November 9, 2021, Technology Inclusive Content of Application Project Public Meeting ML21200A1792021-07-31031 July 2021 Scale/Melcor Non-LWR Source Term Demonstration Project - High Temperature Gas-Cooled Reactor 0CAN062101, Presentation Information for Pre-Submittal Meeting Regarding the Response to Request for Additional Information - Proposed Alternative to ASME Section XI Requirements for Repair/Replacement of Emergency Cooling2021-06-15015 June 2021 Presentation Information for Pre-Submittal Meeting Regarding the Response to Request for Additional Information - Proposed Alternative to ASME Section XI Requirements for Repair/Replacement of Emergency Cooling ML21095A2122021-04-0808 April 2021 Pre-Submittal Meeting - ANO-1 LAR Related to RCS Primary Activity and Primary-to-Secondary Leak Rate ML20344A0572020-12-10010 December 2020 Combined Industry and NRC Slides for the December 10, 2020, Public Meeting on Technology Inclusive Content of Application Project, Advanced Reactor Content of Application Project and Applicability of Regulations to Non-Light Water Reactors ML20315A1582020-11-17017 November 2020 Presentation Meeting Slides for the 11/17/20 Teleconference ML20269A3452020-09-28028 September 2020 Pre-submittal Meeting for Request for One-Time Exemption from 10 CFR Part 50, Appendix E, Biennial EP Exercise (Offsite) Due to COVID-19- Entergy Presentation Slides ML20255A0242020-09-11011 September 2020 (Ano), Pre-Submittal Meeting with NRC - Request to Extend Allowable Outage Time (AOT) for the Emergency Cooling Pond (ECP) ML20211L7052020-08-0404 August 2020 (ANO) Units 1 & 2, Pre-Submittal Slide Presentation for August 4, 2020 Public Meeting ML20114E2752020-04-29029 April 2020 (ANO) Carbon Fiber Reinforced Polymer (Cfrp) Relief Request Pre-Submittal Meeting with NRC - April 29, 2020 ML18107A3342018-04-10010 April 2018 Tech Spec 3.3.5.2a Change Pre-Submittal Meeting Presentation Slides ML18075A1232018-03-20020 March 2018 Entergy Nuclear Operations - March 20, 2018, Presentation Slides for Surveillance Frequency Control Program, UFSAR Change Considerations ML18081A1922018-03-20020 March 2018 Presentation at the PRA Workshop ML17328A3652017-11-30030 November 2017 Workshop on Sharing Operating Experience from Rigging, Lifting and Load Handling Events - Temporary Overhead Crane Failure at Arkansas Nuclear One Presented to IAEA ML15132A1752015-05-21021 May 2015 Summary of Annual Assessment Meeting with Entergy Operations Inc., Regarding ANO 2014 Performance ML15014A0842015-01-14014 January 2015 NRC ANO Unit 1 Stator Drop SDP Evaluation ML14329B2092014-11-25025 November 2014 Summary of Regulatory Conference to Discuss Safety Significance of Arkansas Nuclear One Flood Protection Deficiencies ML14259A5972014-09-16016 September 2014 Summary of Annual Performance Assessment Meeting for Arkansas Nuclear One Performance ML14169A0722014-06-19019 June 2014 Entergy Public Meeting Presentation Slides ML13142A2272013-05-22022 May 2013 Summary of Public Meeting to Discuss Results of Augmented Inspection at Arkansas Nuclear One ML12332A1792012-11-26026 November 2012 Power Point Presentation by Entergy at the November 26, 2012 Meeting (TAC No. ME9706.) ML12275A5492012-10-0101 October 2012 Summary of Meeting with Entergy Operations, Inc., to Discuss the Performance of the Subject Facilities, Recent Organizational Changes, and Current Regulatory Issues ML1218003062012-06-28028 June 2012 Handouts at the June 29, 2012 NFPA 805 Meeting at the Hq - Power Point Slides ML1202501112012-01-25025 January 2012 Licensee Slides Arkansas Nuclear One, Unit 1 - Steam Generators Tube to Tube Wear ML1126502692011-09-22022 September 2011 Licensee Handouts for 10/05/2011 Presubmittal Meeting ML11221A3212011-08-0101 August 2011 521- R326C B&W Tech Cross Training - Chapter 17 ANO-1 Seal Failure ML1110401532011-04-13013 April 2011 Licensee Slides from 4/13/11 Meeting with Entergy Operations, Inc., to Discuss Proposed National Fire Protection Programs Standards 805 License Amendment Submittal for Arkansas Nuclear One, Units 1 & 2 ML1107504262011-03-15015 March 2011 Licensee Slides from 3/15/11 Pre-Sumittal Meeting SWS Room Cooling Required Action ML1107504162011-03-15015 March 2011 Licensee Slides from 3/15/11 Meeting with Entergy Operations on Technical Specification Change - Testing of Idle RCS Cooling Loop ML1016705012010-06-17017 June 2010 Discussion of Screening Criteria - Arkansas Nuclear One (ANO) ML0935201272009-12-18018 December 2009 Nrc/Entergy Operations, Inc., Management Meeting ML0913104172009-05-11011 May 2009 Summary of Meeting with Entergy to Discuss Arkansas Nuclear One 2008 Performance ML0831102062008-11-0606 November 2008 Summary of Meeting with Entergy to Discuss an Open Substantive Crosscutting Issue at Arkansas Nuclear One ML0828000612008-10-0101 October 2008 Enclosure 3-Technical Papers 2 - Plant Application of Weld Onlay for Butt Weld Mitigation ML0828300322008-08-31031 August 2008 NRC Presentation Arkansas Nuclear One - Unit One ML0814306742008-05-22022 May 2008 Summary of Annual Performance Assessment Meeting for Arkansas Nuclear One ML0718004262007-06-29029 June 2007 Summary of Arkansas Nuclear One End-Of-Cycle Public Meeting ML0627703242006-10-19019 October 2006 Draft Slide Presentation for Nrc/Entergy/Westinghouse Pre-Submittal Meeting (Non-Proprietary) ML0619203612006-06-30030 June 2006 Storage Project and Spent Fuel Pool - Meeting Slides Meeting - June 2006 2023-08-11
[Table view] |
Text
I ARKANSAS NUCLEAR ONE I
I APPENDIX R REGULATORY CONFERENCE July 10, 2003
.101p oz 6
2 OPENING REMARKS
.I Craig Anderson Vice President, ANO
Risk Assessment Comparison
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NRC ANO
- 7000 F cable failure temperature temperature
- Limited time phased da'mage damage
- Based on zone wide - Scenario specific operator prompt damage actions evaluated
- Included LOOP - No LOOP
A_
- - o -
Unit 1 4KV Switchgear Room (fire zone 99M) 16
.j A,,-I . /l 99M - south view B6 Load center Dry-type N transformer
... '. 44
- - a II' iAs Typical ANO switchgear cabinet wiring, control cubicle I,
Fire Scenario Selection:
General Approach 18 Three distinct fire scenario classifications:
'An electrical fire (non-energetic) in any of the electrical cabinets in the room Fire may spread in the cable trays, but requires considerable time
- Circuit damage/failures follow a time-phased sequence with first damage after 10 minutes
.er~
A high energy arcing fault switchgear fire that may initiate secondary fire
- The event has an initial (immediate) pressure phase that causes damage to targets and ignites exposed cables in the vicinity a The fire may continue in the switchgear and grow within the ignited combustibles (e.g., cable trays) in the vicinity
- There is an initial/immediate circuit damage/failure followed by potential time-phased circuit damage/failures A transient fire that may spread into cable trays
- A transient fire between B55 and B56 was selected as the maximum expected scenario due to its potential for extent and timing of damage
- ircuit damage/failures follow a time-phased sequence with first damage after 10 minutes
Fire Characterization 21 Electrical cabinet fires "The heat release rate data profile is
',based on the best available fire test HRR Profile data 120 Sandia National Lab (NUREG/CR-4527, loo 87/88) and VTT (Valtion Teknillinen Tutkimuskeskus, 94/96) in Finland 80 Same test used in the NRC SDP analysis = 60
- The ANO HRR is based on the highest t 40-peak of ST5 (unqualified, open 110 21_
,' KBTU loading)-and-allqualified-vert I 20
/ _cabRinetsrxcluding PCT6 and test 23 )
( h1.5_MBTU loading) 0 5 10 15 20
- The NRC HRR is based on test 23 (qualified, open 1.47 MBTU loading) and Time [min]
test 24 (unqualified, open, 1.44 MBTU)
- Time-to-peak is based on the average
- Tests are based on control panels
- The switchgear, MCC's and load centers are enclosed with sealed penetrations
- Used for scenarios 1a, 2 -5
" i M la la a Is In Oa l a ai - E - -
Fire Characterization (cont.) 24 ZOI of the High-energy Switchgear Arcing Fire Top View -0 %%
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- 4. J4 JJ4. 4 .L. S ) C O C I offset as Height 0 o~ 0 0 A
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.I Results I.
loP CFAST Results Ci~ tr Scenario b, Open door 2500 600 I 500 2000 1500 D
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.0 2 4 6 8 10 12 14 Time [Min]
- -Calculated HRR __ Input HRR Ipu UL. Temperature Tm
lesults (cont.) 31 The limiting fire scenario, one that can generate a damaging HGL, is not credible
- The non-suppression probability by.the brigade for very long duration cable fires (100 minutes for the high-energy switchgear event) is 0.01 (per EPRI Fire PRA Guide)
- Fuel depletion, cables ignited earlier have burned out
- Parts of the cable trays are coated with flamastics which both delays ignition and slows propagation of cable fires
- Continued growth of the non-piloted cable fire for a long time is not likely. (Tests reported in NUREG/CR-5387 state that cable fires, "spreading horizontally only as it progressed from level to level")
Maximum expected fire is a high-energy switchgear fire o No credible fire reaches 7000 F in this room (limiting fire scenario)
Results: 34 Frequency of Fire Scenarios in Fire Zon M 1 ~~ ~ ~ ~
IA ANO SDP Analysis Results /1 1I -
V I- _ _ ._
/_
1 -
/
0 WMs Ratio oF -- Pns by WFI Floor
.2 Generic (ignition event for a plant Pn by Source (location area ratio Sev U Frequency weighting source (transient severe personnel fire Results in F for weighting switchgear or fire brigade factor) fires) watch factor) fire la Fire In the A4 switchgear.
Nominal value. 100 KW fire 1.50E-02 2.50E-0 5 88E-Ot 1.00E00 1.20E-01 2.50E01 I OOE+OO 1.00E00 6.62E.05 lb High energy arcing fault In any of the A4 swilchgear breaker cubicles 2 Fire in the B55 MCC. Nominal 100 KW fire. Fires In Inverter Y28 are bounded by this scenario.
t___ ___
.50E02 2.50E-01 5 88-02 1.OOE*00 1.20E-01 1.00E400 1.00E00 1.004E00 2.65E-05 3 Fire In the B56 MCC. Nominal
_----- -. QKMiLfire 50E-02 2.50E-0 1 5 88E-02 1.OOE400 1.20E-01 1.OOE00 t.OOE+00 t1.OE+00 2.65E-05 4 Fire In the Y22 Inverter. Base case. 100 KW fire. Fires in Y24 and Y 25 are bounded by.this scenario. I.50E-02 2 50E-01 5 88E-02 1,00200 1.202-01 1.00E+00 1.00E+00 5 OE-01 1.32E-05 5 Fire in the Load Center 68.
_ a - I QW r fnmlRR t _ 1.50E-02 2.50E-01 5 88E-02 1.002400 t.20E-01 .OOE+00 10.00 2.OE-01 5.29E.06 6a Transient fire In areas o the room.
where cable trays are exposed to a loor-based fire. Nominal Value
- of 50KW . 3 60E-02 2 0OE.00 1.80E-02 1.00E-01 1.0012400 1.00+00 5.002E-O 1.0OE+00 6.48E-05 6b Cable lire caused by welding and cutting In areas of the room where cable trays are exposed to a floor-based fire. Nominal Value of 150KW. 1.30E43 2 OOE+00 2.00E-02 1.00E-01 1.002400 1.00E+00 5.00E02 1.00E+00 2.60E-07 NRC SDP Analysis Results (May 15, 2003 Supplemental Letter Page 25)
Sourco Frequency Electrical cabinets 2.3E-04 Transformers 1.6E-05 Ventilation Subsystems 4.4E-06 r
Key Systems Affected in the Risk- 39 Significance Determination (Fire Zone 99M)
The following systems/trains are directly failed due to fire induced power losses of A4 and B6
- One train and the swing pump of service water
- One train and the swing pump of HPI (makeup)
- The A4 associated diesel is no longer usable I;
SV~ke_ Ce<
Circuit Analysis 40
- Detailed circuit analysis performed on zone 99M
- Investigation of cables located in the trays and conduits associated with the target sets
- Analysis showed no loss of offsite power associated with zone 99M
- NRC evaluation did use loss of offsite power
- Analysis of associated failure modes for affected cables
- Failures unrelated to safe shutdown also examined to provide accurate portrayal of the risk caused by the fire
44 Summary of Procedural Guidance Key Action Previous Procedures ' New Procedure 'a The previous procedures discuss this in great Starting EFW P-7A detail. Spurious and false indicators are not Discussion in new procedure includes 1 manually and positioning mentioned which could delay operator functional indicators.
associated valves response.
Lack of adequate and correct indication is Controlling EFW (A or B) Previous procedures discuss this local or directly discussed in the new procedure to prevent overfill which makes this action more likely in the new procedure.
Local closing of bus A3 This action not explicitly discussed in the T n
!s~Witchgear for P-7B and normal operating procedures but is discussed T new he procedure explicitly addresses HPI A (e.g., inverter fires) injAftemate Shutdo-wn. l Discussed in previous procedures. The timing of this action depends on when letdown is The new procedure addresses the 4 Starting HPI Makeup isolated. possibility of starting the HPI pump locally.
k Isolation of letdown to Inboth the previous and new procedures, this In both the previous and new procedures, 5 avoid needing HPI action is discussed and can be performed in this action is discussed and can be (Makeup) sooner the control room. performed in the control room.
In both the previous and new procedures; this In both the previous and new procedures, 6 S action is discussed and can be performed in this action is discussed and can be long-term cooling the control room. performed in the control room.
I I 4. n.
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Simulator Scenario for Zone 99M 45
- Fire damage chosen to provide HRA information for multiple operator actions
- Fire model beginning with an A4 switchgear fire
- Fire propagated throughout zone causing wide-spread cable damage
- Damage for scenario extends beyond credible fires
- Realistic control room communication challenges
- Fire brigade leader communication
- Timelines based on actual fire drill
- Included need to contact local fire department
- In plant auxiliary operator used for operator actions
- Radio and telephone communications used l/ , .I A r.
ka~~f,)I &cj flj g.s7v, &{c\r mk,1:nic~ Y Atc Q al
EPRI Calculator 53
- Industry sponsored method provides a process for book keeping HRA evaluations
- Addresses HRA requirements in ASME PRA Standard 2002
- Includes several methods for quantification
- Industry and NRC sponsored 2 iU
- Generic data quantitatively differentiate human error probabilities (HEP's) for key characteristics of procec ures and man machine interface 3 HRA analyst judgment is still required
. - I
- OG 't{ vsL fVcAt ,?L, 4 4 ( i., -, ': C,; .Crw J or.1
Overall Summary
- Detailed'analysis of zone 99M
- Credible fires result in time-phased failures ithout zone-wide damage (7000F damage temperature for thermoset cables) (- -
- Detailed circuit analysis indicates there is not a loss of offsite power from any fire scenario
- Simulator scenarios provided realistic data for assessment of operator reliability in the use of previous and new procedures
- ACDF for 99M is 2.2E-07/yr
- Two additional zones considered risk significant for Unit 1
- Risk assessment of zone 99M conservative with respect to other zones
- Conservative estimate of total unit ACDF is < 6.6E-07/yr
- The significance of the use of manual actions to achieve safe shutdown has very low safety significance and should be characterized as GREEN
Overall Summary (cont.) 70 ANO fire protection program
- Defense in depth strategy to prevent and mitigate fires
- Explicit control of combustibles
- Fire brigade effectiveness
- Primarily rely on barriers or physical separation for-equipment required for safe shutdown
- Fire detection and suppression
- Limited use of manual actions utilized for Appendix R compliance
- Actions taken to further reduce risk
- Validated circuit analysis
- Feasibility evaluation of manual actions (E 71111.05)
- New procedures developed to enhance operator response
- Fire detection reliability improved
- ANO can successfully achieve safe shutdown in the event of a fire in any zone , _
I*_
V I