NUCLEAR REGULATORY COMMISSION · Karen Henderson Clare Kasputys Barbara Gabril Linda Herr -Terry...
Transcript of NUCLEAR REGULATORY COMMISSION · Karen Henderson Clare Kasputys Barbara Gabril Linda Herr -Terry...
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UNITED STATES NUCLEAR REGULATORY COMMISSION
WASHINGTON, D.C. 20555-0001
August 14, 2001
NOTE TO COMMISSIONER ASSISTANTS
OCM/GJD OCM/EM
X Dennis Rathbun X Brad Jones Mike Tschiltz - Cynthia Jones Alan Levin Tom Hiltz Julio Lara Joe Olencz Keith McConnell Jose Ibarra Mark Thaggard __ Donna Smith Bob McOsker Noble Green Marian Zobler Karen Henderson Clare Kasputys Barbara Gabril Linda Herr
- Terry Agn
FROM: n W. Craig Assistant for Operations, OEDO
X Janet Schlueter - Kathryn Winsberg
James Beall - Jeffry Sharkey
Linda Lewis - Judy Ledbetter
X Lynne Stauss __ Margie Doane
Brian McCabe John Thoma Heather Astwood Lorna Kipfer
- Tojuana Fortune
SUBJECT: 16TH INTERNATIONAL CONFERENCE ON STRUCTURAL MECHANICS IN REACTOR TECHNOLOGY (SMiRT) PRESENTATION
The subject conference is being held August 12-17, 2001, at the Key Bridge Marriott Hotel, Arlington, Virginia. This conference provides a unique forum to bring together diverse groups: academicians and researchers, analysts and designers, vendors and operators, and regulatory and non-regulatory government professionals - all interested in structural mechanics and safety of nuclear power plant buildings and components. The SMiRT 16 theme is "Challenges to Structural Mechanics: Safety and Cost." SMiRT 16 has 13 topical Divisions on a range of topics, from those related to new plants - such as siting criteria and design - to those more relevant to operating reactors.
Attached is a copy of a presentation to be given by Ashok Thadani at a morning panel session
on August 15th.
Attachment: As stated
cc: W. Travers, EDO (w/o attachment) C. Paperiello, DEDMRS (w/attachment) W. Kane, DEDR (w/o attachment) P. Norry, DEDM (w/attachment) S. Reiter, CIO (w/o attachment) J. Craig, AO (w/attachment) I. Schoenfeld, OEDO (w/attachment) A. Thadani, RES (w/attachment)
SECY (w/attachment) OGC (w/attachment) OCA (w/attachment) OPA (w/attachment) OIP (w/o attachment) CFO (w/o attachment) EDO R/F (w/attachment)
OCM/RM OCM/JM
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United States Nuclear Regulatory Commission
SMiRT 16
NEW DESIGNS AND TECHNOLOGIES ISSUES AND IMPLICATIONS
OfficeAshok Thadani, Director of Nuclear Regulatory Research
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OVERVIEW
+ Changing Environment
+ Recent Developments New Reactor Designs New Technologies
* Policy and Technical Issues
* Infrastructure Needs and Requirements
* What NRC is doing to get ready
+ Role of Structural Mechanics
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Changing Environment
* Demand for Power
* Deregulated Industry
* Environmental Considerations
* Recent Developments
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Commission Policy
+ Encourages Innovative Designs
+ Expects Increased Safety Margins
+ Allows for Innovative Safety Criteria
+ Licensability to be Supported by New Technology Demonstrations
+ Less Prescriptive or Performance - Based Criteria can be
Considered
+ Encourages Early Interaction Between Applicant and NRC
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Recent Developments
New Reactor Designs
+ Light Water Reactors
AP 1000 Design
International Reactor Innovative and Secure (IRIS)
* Non-Light Water Reactors
Pebble Bed Modular Reactor (PBMR)
Gas Turbine- Modular Helium Reactor (GT-MHR)
+ Generation IV
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IRIS is a Modular LWR, with Emphasis on Proliferation Resistance and Enhanced Safety
* Small-to-medium (100-300 MWe) CONRRODIMEAS
power module PESUIERHATR
* Integral primary system
* 5- and 8-year straight burn core REACTOR COOLANT PUMP (1 OF 6)
Utilizes LWR technology, newly ROTATFO INTO STA GENERTUr O. R (I O F •N• 6)
engineered for improved F-OUTLET CH....L HEAD
,1SEAM OUTL T PIPE (I OF 6)
performance •-6
SUPPORT COLUMNS
CONTROL ROO DRIVE LINE EXTENSION
* Most accident initiators are I.....O-ROGUDE
prevented by design SO FEEDWAtER INLET CHANNEL H..D
9 Potential to be cost competitive 4EED WATER INLET PIPE (I O • 6)
with other options
* Development, construction and COW BARREL
deployment by international team.V__EL"D40O:n
* First module projected CORE LOWER SUPPOIT STRUCTURE L W R HEAD
deployment in 2010-2015 IRISINTGRAL REACTOR LAYOUT
NOV. 2000 450465-RA-S$1I REV. A
(6/ Westinghouse Science
4 &TechnologyViewgraph 4
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Pebble Bed Modular Reactor
1 = reactor vessel 4 = fuel 7 = radiation shield 10 = reactor pit cooling 13 = turbo comp. no 2 16 = precooler enclosures 19 = snubbers 22 = generator
2 reactor vessel support 5 = defuelling devise
8 = seismic support 11 = main connection manifold 14 = power turbine 17 intercooler
20 = helium storage tanks (9) 23 = main carrier beam
3 = control rod drive mechanisms 6 = spent fuel storage vessels(7) 9 = heat removal skirt
12 turbine comp. No 1 15 = recuperator 18 power conversion unit
21 = generator coupling 24 = main overhead crane
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Recent Developments
New Technological Changes (Impacting Operating Reactor & New Designs)
+ Risk-Informed Approaches
+ Materials and Structures - Aging Management, Longer Life, High Temp.
+ Power Uprates/High Burnup/Longer Cycle
+ New Fuel Designs (e.g. New Cladding Materials, MOX, Pebble Bed)
+ Use of Digital Systems
+ Application of Advances in Technology and Analytical Tools
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Policy and Technical Issues
SIs a New Design Independent Safety Framework Needed?
Role of the Safety Goals (Limited Surrogate, Modular Plants)
Defense - In - Depth
Development of General Design Criteria (GDCs) for Each Design?
Risk Informed, Performance - Based Approach for: - Design Basis Accident Selection - Safety Classification
Role of PRA (e.g. Replace Single Failure Criterion?) and Deterministic Approach
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Policy and Technical Issues (continued)
+ Legal and Financial
Anti-trust
Price Anderson
Decommissioning Trust Fund
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Policy and Technical Issues
+ Fuel Performance and Qualifications (e.g., Ability to Retain Fission Products at High Temperatures)
+ High-Temperature Application of Materials (Creep Behavior, Failure
Modes, Long-Term Performance)
+ Different Approaches to Safety Assurance
Increased Emphasis on Accident Prevention Containment Robustness Source Term and Emergency Planning
+ Passive Systems - Performance and Reliability
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Policy and Technical Issues
+ Demonstration Testing
+ Use of New Analytical Tools and International Data
+ Greater Use of Digital Systems
+ Human Performance Associated with Multi-Modular Designs
+ Fuel Cycle Safety and Safeguards
+ PRA Methodology and Data
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Infrastructure Needs and Requirements
* NRC
Framework (e.g. Guidance, Review Plans)
Resources (Staff and Funds)
Expertise and Experience (e.g. Natural Hazard, Designs, Construction Inspection)
Scope of Independent Testing
- Probe Fringes (Severe Accident Knowledge) - Critical Areas (e.g., Fuel)
Experimental Programs and Facilities
Analytical Capabilities for Independent Assessment
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Infrastructure Needs and Requirements
SIndustry
Adequate R&D by the Industry
Expertise and Experience
Codes and Standards
Construction/Fabrication
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What NRC is doing to get Ready?
+ Created Advanced Reactor Groups in Both Licensing and Research Offices
+ Engage Early in Process - Pre-Application Reviews
+ Advance RES/Agency's Expertise in Evolving Technology
+ Advance International Collaboration - Sharing of Information and Experiences - Joint Research Programs - Optimize Use of Resources and Facilities - Applicability of Codes and Standards
+ Work with DOE and Industry
+ Work with Codes and Standards Organizations
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Roles of Structural Mechanics
+ Critical Role for Aging Management of Existing Plants and New Designs
+ At the Forefront in Building New Plants
Siting, Design and Construction
+ Implementation of Advanced Technologies
Materials - High Temperature Applications Design/Analysis - Improved Modeling and Calculational Capability Construction/Fabrication - Modular Construction Inspection/Maintenance - On-Line Monitoring
+ Codes and Standards for above and Consideration of Risk Informed Applications
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Roles of Structural Mechanics (continued)
* Advances Required for Integration in Risk Assessment Methodology
Probabilistic Methods Realistic vs. Conservative Failure Modes and Margins Characterization of Uncertainties
4 International Forums, Like SMiRT, Important for Sharing Information, Establishing Needs, and Establishing Programs
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