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=Text=
=Text=
{{#Wiki_filter:From:                         Santos, Cayetano Sent:                         Wednesday, October 14, 2020 1:28 PM To:                           Vogtle PEmails
{{#Wiki_filter:From:
Santos, Cayetano Sent:
Wednesday, October 14, 2020 1:28 PM To:
Vogtle PEmails  


==Subject:==
==Subject:==
FW: Slides for Weldolet Alternative Discussion on the Public Call Tomorrow Attachments:                 VEGP 3&4 Code Alternative for Weldolets - Presentation for Oct 15 Meeting.pdf From: Leighty, Steven <sleighty@southernco.COM>
FW: Slides for Weldolet Alternative Discussion on the Public Call Tomorrow Attachments:
VEGP 3&4 Code Alternative for Weldolets - Presentation for Oct 15 Meeting.pdf From: Leighty, Steven <sleighty@southernco.COM>
Sent: Wednesday, October 14, 2020 12:58 PM To: Gleaves, Billy <Bill.Gleaves@nrc.gov>; Santos, Cayetano <Cayetano.Santos@nrc.gov>
Sent: Wednesday, October 14, 2020 12:58 PM To: Gleaves, Billy <Bill.Gleaves@nrc.gov>; Santos, Cayetano <Cayetano.Santos@nrc.gov>
Cc: Arafeh, Yasmeen N. <YNARAFEH@southernco.com>
Cc: Arafeh, Yasmeen N. <YNARAFEH@southernco.com>  


==Subject:==
==Subject:==
[External_Sender] Slides for Weldolet Alternative Discussion on the Public Call Tomorrow Billy/Tanny, We put together a few high level slides to guide the conversation during the call tomorrow on the draft alternative. There is no new information in the slides, just some talking points to help walk through the draft alternative.
[External_Sender] Slides for Weldolet Alternative Discussion on the Public Call Tomorrow Billy/Tanny, We put together a few high level slides to guide the conversation during the call tomorrow on the draft alternative. There is no new information in the slides, just some talking points to help walk through the draft alternative.
: Thanks, Steve Leighty l Southern Nuclear Licensing Supervisor l Vogtle 3&4 706.848.6790 l sleighty@southernco.com
: Thanks, Steve Leighty l Southern Nuclear Licensing Supervisor l Vogtle 3&4 706.848.6790 l sleighty@southernco.com  


Hearing Identifier:   Vogtle_COL_Docs_Public Email Number:         595 Mail Envelope Properties   (BLAPR09MB7313FB6B4CF6ED087A31893CE5050)
Hearing Identifier:
Vogtle_COL_Docs_Public Email Number:
595 Mail Envelope Properties (BLAPR09MB7313FB6B4CF6ED087A31893CE5050)  


==Subject:==
==Subject:==
FW: Slides for Weldolet Alternative Discussion on the Public Call Tomorrow Sent Date:             10/14/2020 1:27:34 PM Received Date:         10/14/2020 1:27:37 PM From:                 Santos, Cayetano Created By:           Cayetano.Santos@nrc.gov Recipients:
FW: Slides for Weldolet Alternative Discussion on the Public Call Tomorrow Sent Date:
10/14/2020 1:27:34 PM Received Date:
10/14/2020 1:27:37 PM From:
Santos, Cayetano Created By:
Cayetano.Santos@nrc.gov Recipients:  
"Vogtle PEmails" <Vogtle.PEmails@nrc.gov>
"Vogtle PEmails" <Vogtle.PEmails@nrc.gov>
Tracking Status: None Post Office:           BLAPR09MB7313.namprd09.prod.outlook.com Files                         Size                       Date & Time MESSAGE                       775                       10/14/2020 1:27:37 PM VEGP 3&4 Code Alternative for Weldolets - Presentation for Oct 15 Meeting.pdf                   374783 Options Priority:                     Normal Return Notification:           No Reply Requested:               No Sensitivity:                   Normal Expiration Date:
Tracking Status: None Post Office:
BLAPR09MB7313.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 775 10/14/2020 1:27:37 PM VEGP 3&4 Code Alternative for Weldolets - Presentation for Oct 15 Meeting.pdf 374783 Options Priority:
Normal Return Notification:
No Reply Requested:
No Sensitivity:
Normal Expiration Date:  


Alternative Request to ASME Section XI Code Examination Requirements for Weldolets Pre-submittal Meeting October 15, 2020 Plant Vogtle Units 3&4
October 15, 2020 Alternative Request to ASME Section XI Code Examination Requirements for Weldolets Pre-submittal Meeting Plant Vogtle Units 3&4


===
===2 Background===
Background===
* Challenges have been identified with volumetric Section XI examination requirements for Weldolet ASME Class 1 Branch Connections in the Reactor Coolant System (RCS) Pressure Boundary
* Challenges have been identified with volumetric Section XI examination requirements for Weldolet ASME Class 1 Branch Connections in the Reactor Coolant System (RCS) Pressure Boundary
  - Four applicable weldolets total [two in each Unit (3&4)]
- Four applicable weldolets total [two in each Unit (3&4)]
  - Located on branch connection lines within Automatic Depressurization System (ADS) Stage 1 piping 2
- Located on branch connection lines within Automatic Depressurization System (ADS) Stage 1 piping


===
===3 Background===
Background===
Item No.*
Weldolet Branch Connections Item No.*           Description         Examination     Component Limitation B9.31         Branch Connection         Branch   SV3-RCS-PLW-013-SW3 Weld            Connection Geometry B9.31         Branch Connection         Branch   SV3-RCS-PLW-01C-SW3 Weld            Connection Geometry B9.31         Branch Connection         Branch   SV4-RCS-PLW-013-SW3 Weld            Connection Geometry B9.31         Branch Connection         Branch   SV4-RCS-PLW-01C-SW3 Weld            Connection Geometry
Description Examination Limitation Component B9.31 Branch Connection Weld Branch Connection Geometry SV3-RCS-PLW-013-SW3 B9.31 Branch Connection Weld Branch Connection Geometry SV3-RCS-PLW-01C-SW3 B9.31 Branch Connection Weld Branch Connection Geometry SV4-RCS-PLW-013-SW3 B9.31 Branch Connection Weld Branch Connection Geometry SV4-RCS-PLW-01C-SW3 Weldolet Branch Connections
                *Section XI, Table IWB-2500-1 3
*Section XI, Table IWB-2500-1


===
===4 Reason for Request===
Reason for Request===
* ASME Examination Category B-J Requirements for Pressure Retaining Welds
* ASME Examination Category B-J Requirements for Pressure Retaining Welds
  - NPS >= 4, 100 percent surface and volumetric examinations for branch connection welds (B9.31)
- NPS >= 4, 100 percent surface and volumetric examinations for branch connection welds (B9.31)
  - NPS < 4, Surface examinations only
- NPS < 4, Surface examinations only
* Examination Volume not Achievable for Subject Weldolets
* Examination Volume not Achievable for Subject Weldolets
  - The configurations of the subject Weldolets are widely used by the industry
- The configurations of the subject Weldolets are widely used by the industry
  - Challenges with these configurations are typical, and are frequently captured in relief requests 4
- Challenges with these configurations are typical, and are frequently captured in relief requests


Proposed Alternative
5 Proposed Alternative
* Best Effort Volumetric Examination
* Best Effort Volumetric Examination
  - Conducted to the maximum extent practical
- Conducted to the maximum extent practical
  - Minimum examination coverage of 40%
- Minimum examination coverage of 40%
* Surface Examination
* Surface Examination
  - Conducted to the maximum extent practical
- Conducted to the maximum extent practical
* Acceptance Criteria
* Acceptance Criteria
  - In accordance with IWB-3000 for Class 1 systems 5
- In accordance with IWB-3000 for Class 1 systems


Additional Information
6 Additional Information
* Section III Surface Examinations were Performed During Fabrication / Installation
* Section III Surface Examinations were Performed During Fabrication / Installation
  - Testing performed and documented in data packages provided by Stone
- Testing performed and documented in data packages provided by Stone  
    & Webster, Inc.
& Webster, Inc.
  - Liquid Penetrant Examination Method
- Liquid Penetrant Examination Method
  - Results were acceptable
- Results were acceptable
* Section XI Surface Examinations were Performed After Installation
* Section XI Surface Examinations were Performed After Installation
  - Results were acceptable 6
- Results were acceptable


Summary
7 Summary
* 100% Volumetric Section XI Examination Requirements of Subject Weldolets is Not Achievable
* 100% Volumetric Section XI Examination Requirements of Subject Weldolets is Not Achievable
* SNC Requests Alternative to ASME Section XI Requirements
* SNC Requests Alternative to ASME Section XI Requirements
  - Best effort volumetric examinations
- Best effort volumetric examinations
  - Surface examinations
- Surface examinations
* Precedent for Approval in Industry 7}}
* Precedent for Approval in Industry}}

Latest revision as of 15:59, 29 November 2024

COL Docs - FW: Slides for Weldolet Alternative Discussion on the Public Call Tomorrow
ML20288A813
Person / Time
Site: Vogtle  Southern Nuclear icon.png
Issue date: 10/14/2020
From:
NRC
To:
NRC/NRR/DNRL
References
Download: ML20288A813 (9)
v • d • e


Text

From:

Santos, Cayetano Sent:

Wednesday, October 14, 2020 1:28 PM To:

Vogtle PEmails

Subject:

FW: Slides for Weldolet Alternative Discussion on the Public Call Tomorrow Attachments:

VEGP 3&4 Code Alternative for Weldolets - Presentation for Oct 15 Meeting.pdf From: Leighty, Steven <sleighty@southernco.COM>

Sent: Wednesday, October 14, 2020 12:58 PM To: Gleaves, Billy <Bill.Gleaves@nrc.gov>; Santos, Cayetano <Cayetano.Santos@nrc.gov>

Cc: Arafeh, Yasmeen N. <YNARAFEH@southernco.com>

Subject:

[External_Sender] Slides for Weldolet Alternative Discussion on the Public Call Tomorrow Billy/Tanny, We put together a few high level slides to guide the conversation during the call tomorrow on the draft alternative. There is no new information in the slides, just some talking points to help walk through the draft alternative.

Thanks, Steve Leighty l Southern Nuclear Licensing Supervisor l Vogtle 3&4 706.848.6790 l sleighty@southernco.com

Hearing Identifier:

Vogtle_COL_Docs_Public Email Number:

595 Mail Envelope Properties (BLAPR09MB7313FB6B4CF6ED087A31893CE5050)

Subject:

FW: Slides for Weldolet Alternative Discussion on the Public Call Tomorrow Sent Date:

10/14/2020 1:27:34 PM Received Date:

10/14/2020 1:27:37 PM From:

Santos, Cayetano Created By:

Cayetano.Santos@nrc.gov Recipients:

"Vogtle PEmails" <Vogtle.PEmails@nrc.gov>

Tracking Status: None Post Office:

BLAPR09MB7313.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 775 10/14/2020 1:27:37 PM VEGP 3&4 Code Alternative for Weldolets - Presentation for Oct 15 Meeting.pdf 374783 Options Priority:

Normal Return Notification:

No Reply Requested:

No Sensitivity:

Normal Expiration Date:

October 15, 2020 Alternative Request to ASME Section XI Code Examination Requirements for Weldolets Pre-submittal Meeting Plant Vogtle Units 3&4

2 Background

- Four applicable weldolets total [two in each Unit (3&4)]

- Located on branch connection lines within Automatic Depressurization System (ADS) Stage 1 piping

3 Background

Item No.*

Description Examination Limitation Component B9.31 Branch Connection Weld Branch Connection Geometry SV3-RCS-PLW-013-SW3 B9.31 Branch Connection Weld Branch Connection Geometry SV3-RCS-PLW-01C-SW3 B9.31 Branch Connection Weld Branch Connection Geometry SV4-RCS-PLW-013-SW3 B9.31 Branch Connection Weld Branch Connection Geometry SV4-RCS-PLW-01C-SW3 Weldolet Branch Connections

4 Reason for Request

  • ASME Examination Category B-J Requirements for Pressure Retaining Welds

- NPS >= 4, 100 percent surface and volumetric examinations for branch connection welds (B9.31)

- NPS < 4, Surface examinations only

  • Examination Volume not Achievable for Subject Weldolets

- The configurations of the subject Weldolets are widely used by the industry

- Challenges with these configurations are typical, and are frequently captured in relief requests

5 Proposed Alternative

  • Best Effort Volumetric Examination

- Conducted to the maximum extent practical

- Minimum examination coverage of 40%

  • Surface Examination

- Conducted to the maximum extent practical

  • Acceptance Criteria

- In accordance with IWB-3000 for Class 1 systems

6 Additional Information

  • Section III Surface Examinations were Performed During Fabrication / Installation

- Testing performed and documented in data packages provided by Stone

& Webster, Inc.

- Liquid Penetrant Examination Method

- Results were acceptable

  • Section XI Surface Examinations were Performed After Installation

- Results were acceptable

7 Summary

  • 100% Volumetric Section XI Examination Requirements of Subject Weldolets is Not Achievable

- Best effort volumetric examinations

- Surface examinations

  • Precedent for Approval in Industry
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