ML18317A260
| ML18317A260 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 11/13/2018 |
| From: | NRC |
| To: | NRC/NRO/DLSE/LB4 |
| References | |
| Download: ML18317A260 (11) | |
Text
1 Vogtle PEmails From:
Hoellman, Jordan Sent:
Tuesday, November 13, 2018 12:26 PM To:
Vogtle PEmails
Subject:
Pre-submittal Presentation for ASME Section III Pressure Testing Post N-5 (ALT-12) for 11/15/18 Public Meeting Attachments:
Section III PT Presubmittal 11-15-18.pdf Attached is the Pre-submittal Presentation for the 11/15/18 public meeting regarding Alternative to ASME Section III Pressure Testing Requirements Post N-5 (ALT-12). The attachment does not contain any SUNSI.
Hearing Identifier:
Vogtle_COL_Docs_Public Email Number:
386 Mail Envelope Properties (SN6PR0901MB236614043E50817800F5348FD5C20)
Subject:
Pre-submittal Presentation for ASME Section III Pressure Testing Post N-5 (ALT-12) for 11/15/18 Public Meeting Sent Date:
11/13/2018 12:25:33 PM Received Date:
11/13/2018 12:25:39 PM From:
Hoellman, Jordan Created By:
Jordan.Hoellman2@nrc.gov Recipients:
"Vogtle PEmails" <Vogtle.PEmails@nrc.gov>
Tracking Status: None Post Office:
SN6PR0901MB2366.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 226 11/13/2018 12:25:39 PM Section III PT Presubmittal 11-15-18.pdf 504347 Options Priority:
Standard Return Notification:
No Reply Requested:
No Sensitivity:
Normal Expiration Date:
Recipients Received:
LAR-XXX and Alt-12 Alternative to ASME Section III Pressure Testing Requirements Post N-5 Presubmittal Meeting 11/15/18
Agenda
- Background
- Problem Statement
- Scope
- Issue Resolution
- Basis
- Documentation
- Proposed LAR and Alternative Schedule 2
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Background
- Under 10 CFR 50.55a facilities licensed under Part 52 are subject to Section III of the ASME Code prior to the 52.103(g) finding. Following the 10 CFR 52.103 (g) finding, the licensee is subject to ASME Section XI.
- ASME Section III requires a pressure test at 1.25 times design pressure following performance of a repair and/or replacement activity associated with a Class 1, 2, or 3 pressure boundary.
- The requirement to conduct multiple pressure tests at the elevated pressures required by ASME Section III following repair/replacement activities prior to the Section 52.103(g) finding creates a hardship associated with establishing test boundaries and elevated test pressures.
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Problem Statement 61&LVVHHNLQJWRXVHQRPLQDOV\\VWHPRSHUDWLQJSUHVVXUHWRSHUIRUP$60(6HFWLRQ
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This approach is similar to TVA Watts Bar 2
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Issue Resolution (Licensing Path for Changes):
ASME Section III Code Alternative Proposal:
- Request to perform pressure test at nominal system operating pressure for components repaired and/or replaced following the ASME Section III N-5 installation data report consistent with Section XI requirements.
License Amendment and Exemption:
- Expands on ASME Section III alternative request basis and address impact of alternative on ITAAC
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Basis
- Initially all ASME Section III requirements for system have been met, as documented by completion of N-5
- This includes all ASME Section III examinations performed; these examination are performed in accordance with ASME Section V
- Pressure Testing post N-5 will be performed in accordance with ASME Section XI
- ASME Section XI is a proven industry code
- This approach is consistent with operating plants and when they transition to ASME Section XI pressure testing.
- The above approach provides reasonable assurance of the structural integrity of the subject ASME Section III piping.
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Documentation
- Pressure testing required following the completion of the N-5 installation data report will be documented on a supplement to the N-5 installation data report
- Requires ANI review
- An ITAAC Post Closure Notification (PCN) will be issued for ASME pressure tests completed following the completion of the N-5 installation data report
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- Submittal - November 30, 2018
- Requested Approval Date - May 30, 2019
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