ML113120597
| ML113120597 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 11/01/2011 |
| From: | Henley B Luminant Power |
| To: | Office of Nuclear Material Safety and Safeguards |
| Lindsay, H. NMSS/SFST 301-492-3280 | |
| Shared Package | |
| ML113120287 | List: |
| References | |
| Download: ML113120597 (15) | |
Text
Spent Fuel Storage and Transportation Technology Exchange November 1, 2011 By Bruce F. Henley, PE & PMP Project Manager Luminant Power 11/01/2011 1
Comanche Peak Nuclear Power Plant (CPNPP)
- Operating Licenses in 90 and 93
- Common Fuel Building for Both Units
- Seismic Criteria per 10CFR100
- Seismic Analysis Methods Described in Facility UFSAR Chapter 3 11/01/2011 2
CPNPP Dry Cask Storage
- Stack-Up and Transfer
- In Fuel Building Railroad Bay
- On the Structures Basemat 11/01/2011 3
CPNPP Free-Standing Seismic Analyses Licensing Issues -
- Controlled by Part 50 or Part 72 ?
- Part 72 FSAR Silent on Stack-up Inside Part 50 Structure
- CoC Silent on Stack-up Inside Part 50 Structures
- Part 50 Compliance is Plant Specific Requirement 11/01/2011 4
CPNPP Free-Standing Seismic Analyses Technical Issues With Vendors Analysis -
- Energy Dissipation
- Seismic Analysis Method
- Computer Code Used
- Coefficients of Friction 11/01/2011 5
CPNPP Free-Standing Seismic Analyses Evaluation of Requirements -
- Must Pass 50.59 on Methodology
- Part 50 Based Analyses Would Satisfy Part 72 Requirements
- Applicability of 10 CFR 50.65(a)(4) 11/01/2011 6
CPNPP Free-Standing Seismic Analyses Conclusion -
- Analysis Methods Did Not Pass 50.59 Evaluation
- Toppling Consequences Not Acceptable
- Modifications Are Required In Order to Pass 50.59 Evaluation 11/01/2011 7
CPNPP Lateral Seismic Restraint
- Required to Conform to Part 50 UFSAR Design Criteria
- 50.59 Evaluation For Newer ANSYS Versions
- Modified Stack to Being Rigid
- Results 11/01/2011 8
11/01/2011 9
11/01/2011 10
CPNPP Long Range Goal Have a Free-standing seismic stack-up analysis in lieu of the lateral seismic restraint.
- If Shimmed, 72.48 & 50.59 Applicable
- Seismic Analysis, 50.59 Applicable 11/01/2011 11
Regulatory Guidance Desired Guidance For Analysis Should Address -
- Both Part 100 and pre-Part 100 Plants
- Building on Plants Part 50 UFSAR Requirements
- Useful for Both Inspectors and Utilities 11/01/2011 12
Regulatory Guidance Desired Guidance For Analysis Should Address (cont.) -
- Sliding & Rocking
- Coefficients of Friction
- Stability Analysis Methods
- Additional Analysis Considerations 11/01/2011 13
Regulatory Guidance Desired Guidance For Analysis Should Address (cont.) -
- Design Considerations
- Design Margins / Factors of Safety
- Guidance Should Be 50.59 Friendly (NEI 96-07)
- Audits / Inspections to Verify Compliance 11/01/2011 14
Questions?
11/01/2011 15