ML080990270
| ML080990270 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 04/07/2008 |
| From: | Shahkarami A NRC/OCM, Nuclear Energy Institute |
| To: | |
| References | |
| M070407A | |
| Download: ML080990270 (46) | |
Text
COMMISSION BRIEFING SLIDES/EXHIBITS BRIEFING ON DIGITAL INSTRUMENTATION AND CONTROL APRIL 7, 2008
Digital Instrument & Controls Industr Vmiew April 7, 2008 Amir Shahkarami Exelon, Senior Vice President Engineering and Technical Services H U CL E A I
N E R G Y IN S T I T U T E
Topics
" Objective
" Goals
" Status
- Conclusions 2
Objective
- Safety-focused application of digital technology Current operating plants Design certification New plants New fuel facilities
- Stable, predictable, and timely licensing process with realistic guidance
- Enhance plant safety, availability, and reliability N*'E I 3
Goals (l of 2)
- Short term - Interim Staff Guidance (ISG)
- Technically sound Practical to apply
- Appropriate detail of regulatory evaluations/reviews
- Long term - Final staff guidance Incorporate ISG content into final regulatory guidance
- Assure consistency with applicable industry codes and standards Endorse related, detailed industry guidance IIIE I4
Goals (2 of 2)
- Overall Assure continued safe operations through each nuclear facility's digital application Change regulatory guidance to keep pace with technology developments Ensure changes to current positions are made in accordance with appropriate regulatory process and well communicated to stakeholders tIE
Overview
- Project Management Project Plan (responsibilities, deliverables, due dates)
Pilot Project (validating ISGs, resolving issues, sharing lessons learned, revising guidance)
NRC - Industry collaboration
- Steering Committee oversight On-going Industry involvement and support 6
Status (l of 4)
- Continued Attention Manual Operator Actions Fixed (30-minute) time period versus Method for determining acceptable time period Documents requested
- What should be submitted and when
- Available vs. Reviewed vs. Docketed 7
Status (2 of 4)
- Continued Attention (cont)
- Review level-of-detail Independent design review/re-verification versus Reasonable assurance determination Diverse Actuation System
- Avoid expanding the scope to situations that do not result in a significant safety benefit
- '%EI 8
Status (3 of 4)
Project Schedule
- NRC & Industry actively supporting into 2009 e Oversight I Steering Committee e Resources / accountability / Task Working Groups
- Project deliverables in use now
- ISG-04 "Communications" used in staff review e ISG-06-draft "Licensing Process" used in listing documents for LAR Rollover to permanent guidance stared
- ISG-01 "Cyber Security" is-being used in draft rulemaking and Regulatory Guide 9
Status (4 of 4)
Project Progress
-Topical areas (TWGs) 7
- Problem Statements 25
-Acceptably completed 3
%,IE I
10
Conclusions Project Plan
- Continue management oversightI coordination Pilot Project
- Validate Licensing Process. lSGs
-Highest importance and significance e Demonstrate effective and timely regulator process for licensing digital upgrades Guidance
- Continue to refine and enhance regulatory guidance, as necessary
- Develop a stable, predictable, and timely licensing process with realistic guidance 11
" D-3 DAS DI&C ESPS ISG ITAAC LAR NEI
" RPS
" TWG Anticipated Transient Without Scram Branch Technical Position Diversity & Defense-in-Depth Diverse Actuation System Digital Instrumentation and Control Engineered Safeguards Protective System Interim Staff Guidance Inspections, Test, Analyses, and Acceptance Criteria License Amendment Request Nuclear Energy Institute Reactor Protective System Task Working Group NE I 12 12
Duke Energy Oconee RPS/ESPS Submittal ApriI7 2008 Ron Jones Senior Vice President Nuclear Operations Duke Energy@
RPS/ESPS Upgrade
- Replaces existing analog Reactor Protective System (RPS) and Engineered Safeguards Protective System (ESPS).
" New system is AREVA TELEPERM XS (TXS) digital protection system
- Currently installed in European nuclear plants
" Involves changes to the Oconee licensing basis and Technical Specifications bDuke W*£nergy.
Implementation e Target implementation dates are:
- Fall 2009
- Fall 2010
- Fall 2011 Oconee Unit 1 Oconee Oconee Unit 3 Unit 2
- Unit 1 TXS System is designed and fabricated
- Factory Acceptance Testing will occur in 4 th Qtr 2008 with site delivery in early 2009 Duke 3 W*£nergy.
Rationale for I&C Upgrade
- Duke is improving. key i&C systems by adopting digital technology
- Duke faced with decisions to either re-engineer existing systems or move to modern digital technology
- Duke decided to upgrade RPS/ESPS in order to enhance nuclear safety and operational reliability Duke 4 Energye
Digital Licensing Submittal
- Duke developing programs to address the technical, quality, and regulatory requirements of digital technology
- Duke and AREVA worked diligently to prepare a licensing submittal responsive to the NRC guidance
- Advanced system features have been a challenge to existing regulatory guidance Duke 5
Licensing Process
- Duke appreciates the efforts by the NRC and NEI to address technology issues in licensing digital upgrades
- Duke submittal should-benefit from the Communications and Cyber Security ISGs and hopefully the Licensing Process ISG
- A stable, timely and predictable digital licensing process is essential to industry confidence in upgrading I&C systems Ov~nrg¥@
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Digital I & C New Plant Perspective April 7, 2008 Mitch Lucas Vice President-Luminant Power Nuclear Engineering & Support "k> ~
New Plant Feedback
- Improved reg ulatory guidance should
)le, predictable and timely licensing
-Result in stal
- e~5 process
-Provide clarity in areas such as Human Factors, D3, Cyber Security, Communications
-Provide clarity when using Standard Plan - for both, NRC and Industry
-Help ensure consistencies in interpr timely reviews Review etations and 1
L*d?*
New Plant Feedback (cont.)
Clear understanding of NRC expectations will help new plant designs & licensing efforts In general, to-date, new plants have not. identified conflicts with issued guidance
" Manual -Operator Actions Methodology endorsement by US NRC staff (alternative to the 30 minute criterion) (on-going)
" Need 'clarity on DI&C submittals vs. audits for ITAAC closure
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2
New Plant Feedback (cont.)
- For the next 2+ years, Industry feedback mechanism to the DI&C Steering Committee is recommended
-Where issued guidance appears to require additional clarifications regarding consistency in interpretation
-When new issues are identified clarifications needing Pilot projects to validate guidance and help build effectiveness of issued confidence in the process N
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~.
4
Summary S Digital I&C will enhance safety, reliability and human performance in new plants E Joint NRC/Industry efforts will result in a stable, predictable and timely licensing process for new plants
- improved guidance with consistent interpretation will result in efficiencies in terms of resources and time for both, new plants and NRC
- ,:ii'f.:,,,d
US NRCLE UNITED STATEs
-NULEAR REGULATORY COMMISSION x
Protecting People and the Environment Briefing on Digital Instrumentation anu Controls April 07, 2008
Agenda Introduction Review of Issued Interim Staff Guidance Use of Interim Staff Guidance and Operating Experience Review of Ongoing Efforts Path Forward J. Grobe R. Croteau P. Hiland M. Mayfield J. Grobe 2
Digital Instrumentation ana Controls Steering Committee
- Task Working Groups
- Group
- Group Group 1:
2:
3:
- Group 4:
- Group 5:
Cyber Security Diversity and Defense in Depth Risk-Informed Digital Instrumentation and Control Highly-Integrated Control Room Communications Highly-Integrated Control Room Human Factors Licensing Process Fuel Cycle Facilities
- Group
- Group 6:
7:
3
Digital Instru entation and Controls Steering Committee
- Activities Since July 2007
- Human Capital Investment
" Hring.
" Training
" Graduate Fellowship Program 4
Digital Instru entation and Controls Steering Committee Activities Since July 2007 (cont.)
- Task Working Group Accomplishments
- 32 Public Meetings
- 4 Interim Staff Guidance Documents issued
- Fuel Cycle Task Working Group Established
- Project Plan Revised 4 Industry White Papers Received 5
Digital Instrumentation and Controls Steering Committee Issued Interim Staff Guidance Documents
- September 2007: Diversity & Defense In Depth
- September 2007: Highly Integrated Control Room - Communications
- September 2007: Highly Integrated Control Room - Human Factors
- December 2007: Cyber Security 6
Digital Instrumentation and Controls Steering Co ittee Remaining Interim Staff Guidance Documents
- 2008: Probabilistic Risk Assessments Licensing Process Manual Operator Actions Fuel Cycle Facilities 2009: Licensing Process With Cyber Security 7
Digital Instrumentation and Controls Steering Commi
- Interfaces
-ACRS
- Other Agencies and Industries
- International Organizations 8
Issued Interi Staff Guidance.
Diversity and Defense-in-Depth P rotection Against Common-Cause Failures
- Software Error may Affect all Divisions 9
Issued Interim Staff Guidance:
Diversity and Defense-in-Depth
- Applicant Should Perform Analysis
" Backup Capability SDiverse Actuation System SManual Actions 10
Issued Interim Staff Guidance.
Highly-Integrated Control Room Communications Describes Acceptable Approach:
- Interdivisional Communications Multidivisional Control and Display Stations
- Command Prioritization for Safety
-over Non-Safety Functions 11
Issued Interim Staff Guidance.
Highly-integrated Control Room Human Factors
- Com uter-Based Procedures Backup Procedure Operator Should Always be in Control
" Minimum Inventory 12
issue Staff Guidance:w Cyber Security SRegulatory Guide
.NEI Guidance -Al
- Table Correlating the RG eEither Acceptable
- Safety Systems I Plant Systems NEI Guidance witch 13
use Ciomaterim Staff tGuiance ISG-04: 'Comunications
- Using for Prioritization and Control Module Topical Report Review
- Interim Staff Guidance is Providing a Clear Roadmap 14
use of Interim Staff Guidance Oconee Application
" Digital ReactorTrip System and Engineered Safety Feature Actuation System Modification
" Review Design Features Using ISGs
" Pilot Draft iSG-06: Licensing Process
" Developing Inspection Procedure 15
Operating Experience
- National and International Data Bases
" CCFs are a Valid Concern
" Limited Level of Detail SContinuing Review of Nuclear and Non-Nuclear Data 16
operating Experience DI&C Events
- Domestic Power Reactor-Failed Feedwater Control 'System Complications During Recovery
- Domestic Fuel Cycle Facility-Digital Control System Re-lnitialization of System Configuration
- Foreign Power Reactor -- Digital Relays Delay in Disconnecting Main Generator 17
Ongoing Efforts
- Risk Informing Digital I&C New Reactor Digital I&C PRA ISG is Near Completion PIan for Risk Insights Active Interactions with Industry 18
Ongoing Efforts Alternative Process to 30 Minute Criteria Operator Action to Cope with Common Cause Failures
-Human Factors TWG
-Issue ISG 'in 2008 19
Ongoing Efforts SFuel Cycle Facilities
-Project Plan has been Developed
- Interacting.with the Industry to Develop Guidance 20
Path Forward
" Issue Interim Staff Guidance Documents
" Revise Interim Staff Guidance as Neededl
" Address Long Term Actions to Update Regulatory Infrastructure 21
Acronyms ACRS CCF DI&C ISG NEI PRA QA RG TWG Advisory Committee-on Reactor Safeguards Common Cause Failure Digital Instrumentation and Control Interim Staff Guidance Nuclear Energy Institute Probabilistic Risk Assessment Quality Assurance Regulatory Guide Task Working Group 22