Staff Bullets for October 21, 2019 Public Meeting, Vogtle Electric Generating Plant Units 3 and 4, LAR-19-017, Request for License Amendment: Removal of the PRHR-HX Natural Circulation Test| ML19325C672 |
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| Site: |
Vogtle  |
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| Issue date: |
11/21/2019 |
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| From: |
Donald Habib
NRC/NRR/VPOB |
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| To: |
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| References |
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| Download: ML19325C672 (1) |
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Category:- No Document Type Applies
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[Table view] |
Text
11/21/2019 Technical Discussion of LAR 19-017, Removal of the Preoperational Passive Residual Heat Removal Heat Exchanger Natural Circulation Test.
Below lists supplemental information needed to support the staffs review.
- 1. Additional information to be included in the LAR submittal:
- Integrated system frictional and minor head loss acceptance criteria.
- Discussion regarding how the forced flow test can demonstrate the as-built friction loses with margin to design values and is appropriate given flow regime differences between prior to establishment of natural circulation and fully developed flow.
- Information related to any analytical reconciliation that will be performed of the as-built forced flow test data of parameters related to initiation of natural circulation against the validated LOFTRAN model.
- 2. Available for Audit:
- China test information for parameters related to the initiation of natural circulation.
- Validation or confirmation of LOFTRAN performance and capability to predict the initiation of natural circulation based on the as-built tests performed at China plants including a comparison of as-built frictional losses to the design values.
- Sensitivity studies relative to frictional margin.