ML24261C019
| ML24261C019 | |
| Person / Time | |
|---|---|
| Site: | 99902049 |
| Issue date: | 09/17/2024 |
| From: | Shurtleff C Holtec, SMR |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML24261017 | List: |
| References | |
| 300-USNRC-096 | |
| Download: ML24261C019 (1) | |
Text
www.holtec.com www.smrllc.com SMR-300 CRDS Testing Plans October 1, 2024 Presented by: Clark Shurtleff SMR, LLC, A Holtec International Company Krishna P. Singh Technology Campus One Holtec Boulevard Camden, NJ 08104, USA
[Not Export Controlled]
holtec.com l smrllc.com l Page 2 Meeting Agenda
Introductions
Purpose & Outcome SRP 3.9.4 Expectations Discussion of Testing Program Overview of SMR-300 CRDS Design Open Forum
holtec.com l smrllc.com l Page 3 Purpose & Outcome
Purpose:
Describe the approach to meet SRP 3.9.4 Acceptance Criteria Describe the CRDS design Outcome:
Align on plan for CRDS Operability Assurance Program:
SMR-300 design will reference existing testing and operating experience (OE)
Identify essential parameters necessary to demonstrate applicability of existing testing and OE Identify information necessary to be submitted to support review
holtec.com l smrllc.com l Page 4 SRP 3.9.4 Review Areas
- 1. Descriptive information on design and operation
- 2. Design codes, specifications, GDCs, guidance applied
- 3. Design loads, load combinations, and associated limits
- 4. Operability assurance program or reference to prior test programs Describe design and operation in SAR Focus of this meeting Describe applicable codes, GDCs, etc. in SAR Meet ASME Code requirements for pressure boundary Meet specified requirements for other components
holtec.com l smrllc.com l Page 5 Operability Assurance Program From SRP 3.9.4:
The operability assurance program is reviewed to ascertain coverage of the following:
A. Life cycle test program, including acceptance criteria for testing B. Proper service environment imposed during testing C. Mechanism functional tests D. Program results
holtec.com l smrllc.com l Page 6 Operability Assurance Program SMR asked what Operability Assurance Program means during Sept 2022 meeting (ML22252A194)
NRC Response:
With respect to the NRCs definition of operability assurance as it relates to the overall control rod drive mechanism and CRDS function, the NRC staff responded that the reactor should be able to be shut down and safely kept shut down in all postulated conditions over the entire life of the plant.
SMR understanding:
Operability Assurance = Life cycle testing +
Factory acceptance testing +
Startup testing + In-service testing
holtec.com l smrllc.com l Page 7 Operability Assurance Program Two main options:
- 1) Conduct a new testing program
- 2) Reference previous test programs and/or OE on similar apparatus SMR is pursuing Option #2 Need to demonstrate applicability of previous test programs/OE Pre-service testing for SMR-300 CRDS will be limited:
Factory acceptance testing Pre-operational/startup testing (once installed)
holtec.com l smrllc.com l Page 8 Purpose of Operational Assurance Demonstrate key performance metrics:
Insertion and withdrawal times Latching operation Scram operation and time Wear Stability of attributes over time Ability to overcome stuck rod Functional testing Stability/Endurance testing Operational experience In-service testing Analysis See SRP 3.9.4, III. REVIEW PROCEDURES, #4
holtec.com l smrllc.com l Page 9 Purpose of Operational Assurance Key performance metrics inform SMR-300 safety analysis:
Insertion and withdrawal times Normal operations (startup, shutdown)
Ch 15 - Uncontrolled RCCA Withdrawal Ch 15 - Control Rod Misoperation Rod drop time
holtec.com l smrllc.com l Page 10 SMRs plan to demonstrate that key performance metrics will be met in SMR-300 Demonstrate applicability of prior testing/OE Compare essential parameters in three major areas:
Operating conditions Temperature Pressure Flow Chemistry Design lifetime Mechanical response:
Deflection of CRGA Deflection of CRDM pressure housing Influenced by:
Loading (e.g., seismic, LOCA)
Equipment design CRDM Upper internals RCCA Fuel Assembly
holtec.com l smrllc.com l Page 11 Question for NRC Staff:
Are there any essential parameters that are not listed that the NRC staff is interested in seeing evaluated?
Equipment design CRDM Upper internals RCCA Fuel Assembly Operating conditions Temperature Pressure Flow Chemistry Design lifetime Mechanical response:
Deflection of CRGA Deflection of CRDM pressure housing Influenced by:
Loading (e.g., seismic, LOCA)
holtec.com l smrllc.com l Page 12 SMR will compare essential parameters to those used in prior test programs and operating plants SMR-300 Qualification Summary Report will justify applicability of testing and OE:
Equipment design Compare SMR-300 to tested and operating configurations Operating conditions Compare SMR-300 to test conditions and operating plants Mechanical response Compare SMR-300 deflections to tested deflections
holtec.com l smrllc.com l Page 13 holtec.com l smrllc.com l Page 13 Question for NRC Staff:
Is there any documentation that is not listed that the NRC staff would want in order to evaluate the CRDS?
SAR content:
SSC design description Operating conditions Mechanical response
(PSAR) Analysis methods and acceptance criteria
(FSAR) Analysis results Reference Qualification Summary Report Qualification Summary Report:
Summarize existing testing and OE Justify applicability to SMR-300 design
holtec.com l smrllc.com l Page 14 SMR-300 CRDS Design
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holtec.com l smrllc.com l Page 15 holtec.com l smrllc.com l Page 15 CRDM Design - ((Framatome L106A))
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holtec.com l smrllc.com l Page 16 holtec.com l smrllc.com l Page 16 Upper Internals
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holtec.com l smrllc.com l Page 17 holtec.com l smrllc.com l Page 17 RCCAs
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holtec.com l smrllc.com l Page 18 holtec.com l smrllc.com l Page 18 Fuel
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holtec.com l smrllc.com l Page 19 Operating Conditions SMR-300
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Normal Operating Temperature
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Normal Operating Pressure
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Average Coolant Flow Velocity Through Core
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Chemistry
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holtec.com l smrllc.com l Page 20 Conclusion - SMR plans to:
Meet SRP 3.9.4 guidance for Operability Assurance by referencing existing test programs and operating experience Utilize key performance metrics from prior testing/OE to as inputs to safety analysis Demonstrate applicability by comparing essential parameters to previous test programs and operating plants
holtec.com l smrllc.com l Page 21 Next steps Possible future preapplication meetings Additional detail on essential parameters:
Changes to CRDS design to address OE Details of upper internals design Anticipated deflections Planned timelines for completion of design and analysis
holtec.com l smrllc.com l Page 22 Open Forum