ML24348A145
| ML24348A145 | |
| Person / Time | |
|---|---|
| Site: | 07201032 |
| Issue date: | 12/12/2024 |
| From: | Holtec |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML24348A143 | List: |
| References | |
| 5018121 | |
| Download: ML24348A145 (1) | |
Text
Attachment 1 to Holtec Letter 5018121 Amendment Request 1032-10 SUPPLEMENT TO
SUMMARY
OF PROPOSED CHANGES All changes to the FSAR are marked in the subsequent attachments. Changes that have occurred as part of prior applications are not marked as changes.
Proposed Change #5 Revise the FSAR methodology for HI-TRAC VW missile penetration to allow site-specific analysis to take credit for the HI-TRAC VW water jacket shell.
Reason for Proposed Change #5 The FSAR analysis of the HI-TRAC VW currently makes the conservative assumption that the water jacket shell provides no resistance to a tornado missile impact. The generic missiles in the FSAR meet all acceptance criteria with this assumption, and continue to do so, however for some sites with higher wind speeds or larger site specific missiles, this overly conservative assumption limits the use of the HI-STORM FW system unnecessarily.
Justification for Proposed Change #5 The HI-TRAC VW is fabricated in accordance with the licensing drawings in Section 1.5 of the FSAR.
Those drawings include both the outer shell currently analyzed for tornado missile impacts as well as the water jacket shell. Since the full HI-TRAC VW design is implemented at sites, the assumption that only one shell is used for analysis is overly conservative with no additional safety benefit. The same classical energy balance methodology can be utilized with just the additional shell included. Changes have been proposed to the HI-STORM FW FSAR Chapter 3.