ML15042A415
"Draft Meeting" is not in the list (Request, Draft Request, Supplement, Acceptance Review, Meeting, Withholding Request, Withholding Request Acceptance, RAI, Draft RAI, Draft Response to RAI, ...) of allowed values for the "Project stage" property.
| ML15042A415 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 02/11/2015 |
| From: | Watford M Plant Licensing Branch IV |
| To: | Edington R Arizona Public Service Co |
| Watford M | |
| References | |
| TAC MF5559, TAC MF5560, TAC MF5561 | |
| Download: ML15042A415 (30) | |
Text
Palo Verde / NRC Meeting Risk Informed Completion Times February 17, 2015
Introductions
Bryan Thiele Department Leader Nuclear Engineering
Agenda
- Introduction Bryan Thiele
- Palo Verde Overview Tom Romay
- License Amendment Thomas Weber
- PRA Summary Everett DePue
- Implementation Plan Tom Romay
- Path Forward and Closing Comments Bryan Thiele 3
Desired Meeting Outcomes
- Summarize PVNGS design with focus on unique features
- Discuss license amendment content and variances from TSTF 505
- Provide overview of PRA models
- Discuss implementation plan
- Describe path forward 4
Palo Verde Design Overview Tom Romay Shift Manager Senior Reactor Operator
Palo Verde Design Features
- Three identical, separate Units, minimal shared SSCs
- No pressurizer PORVs
- Low leakage RCP seals on loss of seal cooling
- Four channels of class instrumentation (two trains w/2 channels each)
- Demonstrated capability to feed SG with no AC/DC power 6
RICT Timeline 2012 2013 2014 2015 2016+
7 License Amendment Drafted and Sent Out for Cross Organization Review -
1st Cut Benchmarking with Vogtle and Diablo Canyon LAR Submittal All PRA Peer Reviews Complete (Internal Events, Fire, Flood, Seismic)
Approval and Implementation LAR Final PVNGS Internal Review Fire and Seismic PRA Development
License Amendment Request Thomas Weber Department Leader Nuclear Regulatory Affairs
- Based on TSTF 505-A & NEI 06-09-A
- Scope includes components modeled in PRA
- 25 LCOs
- Mode 1 and 2 only
- New TS Section 5.5 Program
- Variances from TSTF 505 addressed in LAR and include:
- Miscellaneous variances described in LAR 9
TS 3.4.12, Pressurizer Vents
- NOT in TSTF 505 or NUREG 1432
- In PV Safety Analysis
- Modeled in PRA
- RICT added to Two Required Actions
- Note added to preclude voluntary entry with with all pressurizer vent paths inoperable 10
TS 3.7.3, MFIVs
- Not in TSTF 505 but is in NUREG 1432
- LAR adds restoration action
- MFIVs modeled in PRA
- RICT added to Two Required Actions
- Note added to preclude voluntary entry with both MFIVs in same flow path INOP 11
Miscellaneous Variances
- Did not add RICT for some restoration conditions
- TS 3.7.4, ADV
- Added note to preclude voluntary entry with all ADVs INOP
- Added restoration condition
- Added note to preclude voluntary entry
- TS 3.8.7, Inverters
- Revised note since PVNGS Design has two inverters per train supporting 4 channels of vital instruments 12
Summary
- TSTF 439 in progress
- Minimizing other LARs at PVNGS that have changes to TSTF 505 LCOs
- Communicating with other Utilities
- Participating in Industry Committees
PRA Models Everett DePue Senior Engineer PRA Lead for TSTF-505
Summary of PRA Models
- PRA models developed and peer reviewed
- Internal events
- Internal flood
- Internal fire
- Seismic
- RG 1.200 Rev. 2 hazards screened and peer reviewed
- Total CDF/LERF meet RG1.174 Rev. 2 limits
- Internal events and internal flood risk very low
- CDF/LERF dominated by internal fire and seismic hazards 15
Internal Events PRA
- Peer review by CEOG conducted in 1999
- Self-assessment performed against entire RA-Sa-2009 in 2015
- RA-Sa-2009 Supporting Requirements met to Capability Category II except:
- Some sub-elements of SY-C1, SY-C2 System Notebook Documentation need completion
- To be completed prior to RICT Program implementation 16
Internal Flood PRA
- Industry Peer Review conducted in 2010
- All ASME/ANS PRA requirements met to Capability Category II after peer review findings addressed 17
Internal Fire PRA
- Complies with methods in NUREG/CR-6850
- Industry Peer Review conducted in 2012
- Follow-up Industry Peer Review conducted in 2014 - addressed 2012 findings
- All ASME/ANS requirements met to Capability Category II after peer review findings addressed 18
Seismic PRA
- Industry peer review conducted in 2013
- All ASME/ANS requirements met to Capability Category II after peer review findings addressed except
- SPR B7 Complementary Success Logic
- Meets CC II for ASME/ANS RA-Sb-2013 19
Plant-Specific Modeling
- Real time risk model as currently used for existing Technical Specification CRMP OR
- Pre-solved solutions (STP approach) 20
Plant Modifications
- PRA models rely on installation of modifications or taking compensatory measures
- RICT Program will not be implemented until modifications complete or compensatory measures in place
Implementation Plan Tom Romay Shift Manager Senior Reactor Operator
Implementation Plan
- Engineering coordinate RICT implementation
- Cross organization team supporting implementation
- RICT implemented in Modes 1 and 2 only
- CRMP tool PRA Models will include Internal Events, Internal Flooding, Fire, and Seismic
- Extensive use of industry participation &
benchmarking to develop program, procedures, training 23
Procedures
- Revise 40DP-9RS01, Operations Department Online Nuclear Risk Management Mode 1 and 2, to include RICT, RMAT, and RMA determinations
- New RICT Program Procedure 24
Training
- Licensed Operators
- Hands-on training on RICT calculations
- Classroom training to address how RICT impacts Station Operations
- Station Management
- Affected managers trained on process, expectations, limitations
- Engineering, Work Management 25
Communications
- Industry peers via TSTF-505 task force
- Site-wide Articles at Station
- While submittal under review
- Once submittal is approved
- Leader Alignment Meetings
- Department All Hands Meetings 26
Credited Modifications
- DC ammeter circuits
- Non-class 1E DC motor circuits
- Replace RCP control cables with fire rated cables
- Install new permanently staged Steam Generator (SG) makeup pump that utilizes FLEX connections
- Breaker coordination on risk significant non-class 1E motor control centers/panels 27
Path Forward and Closing Comments Bryan Thiele Department Leader Nuclear Engineering
Path Forward
- Address Fire PRA peer review comments
- Submit LAR in June
- Finalize scope and install modifications
- Complete procedures, software and training in parallel with NRC review
- Implement in late 2016 29
30 We SAFELY and efficiently generate electricity for the long term