View source for NL-16-0421, Full Structural Weld Overlays on Reactor Recirculation and Residual Heat Removal Systems, Nondestructive Examination Results - Spring 2016 Outage (1R27)

{{Adams
| number = ML16077A320
| issue date = 03/17/2016
| title = Full Structural Weld Overlays on Reactor Recirculation and Residual Heat Removal Systems, Nondestructive Examination Results - Spring 2016 Outage (1R27)
| author name = Pierce C
| author affiliation = Southern Co, Southern Nuclear Operating Co, Inc
| addressee name = 
| addressee affiliation = NRC/Document Control Desk, NRC/NRR
| docket = 05000321
| license number = 
| contact person = 
| case reference number = NL-16-0421
| document type = Inservice/Preservice Inspection and Test Report, Letter type:NL
| page count = 6
}}

=Text=
{{#Wiki_filter:Charles R. Pierce               Southern Nuclear Regulatory Affairs Director     Operating Company, Inc.
40 Inverness Center Parkway Post Office Box 1295 Birmingham, AL 35242 Tel 205.992.7872                          SOUTHERN * \
NUCLEAR Fax 205.992.7601 A SOUTHERN COMPANY MAR 1 7 2016 Docket Nos.: 50-321                                                    NL-16-0421 U. S. Nuclea r Regulatory Commi ssion A TIN: Docum ent Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclea r Plant- Unit 1 Full Structural Weld Overlays on Reacto r Recirculation and Residual Heat Removal System s Nondestructive Examination Result s- Spring 2016 Outage (1R27)
Ladies and Gentlemen:
By letter dated Decem ber 18, 2015, the Nuclea r Regula tory Commi ssion (NRC) approv ed the use of inservice inspection (lSI) Alternative HNP-ISI-ALT-1 5-01.
This Alternative allowed the installation of full structural weld overlay s (FSWOL) on four welds at Edwin I. Hatch Nuclea r Plant (HNP) Unit 1 during the spring 2016 refueling outage. Below is the lSI weld identification numbe r for each of the four welds:
* 1B31-1 RC-12B R-C-5
* 1B31-1 RC-12B R-E-5
* 1E11-1 RHR-2 4A-R-1 2
* 1E11-1 RHR-2 4A-R-1 3 The lSI Alternative stated (in part) that Southern Nuclea r Operating Compa ny (SNC) ''will provide the NRC, within 14 days after the completion of the ultrasonic examination of the weld overlay installations, (1) the examination results of the weld overlays, and (2) a discussion of any repairs to the overlay materia l and/or base metal and the reason for repair."
The nondestructive examination (NDE) was completed on March 6, 2016.
The attache d Table 1 docum ents the examination results and includes a description of any repairs and the reasons for the repairs. These NDE examination results suppor t the position that the weld overlays are acceptable for service The Alternative requires the lSI ultrasonic examination to be repeate d in either the 1 R28 or the 1R29 outage. This letter satisfies the 14-day examin ation reporting requirements.

U.S. Nuclear Regulatory Commission NL  Page2 This letter contains no NRC commitments. If you have any questions, please contact Ken McElroy at (205) 992-7369.
Respectfully submitted,
: c. -R. B>>
C. R. Pierce Regulatory Affairs Director CRP/RMJ

==Enclosure:==
Hatch Unit 1 Weld Overlay Examination Results and Repairs during the 1R27 Outage cc:   Southern Nuclear Operating Company Mr. S. E. Kuczynski, Chairman, President & CEO Mr. D. G. Best, Executive Vice President & Chief Nuclear Officer Mr. D. R. Vineyard, Vice Preside nt- Hatch Mr. M. D. Meier, Vice Preside nt- Regulatory Affairs Mr. D. R. Madison, Vice Preside nt- Fleet Operations Mr. B. J. Adams, Vice Preside nt- Engineering Mr. G. L. Johnson, Regulatory Affairs Manager - Hatch RTYPE: CHA02.004 U.S. Nuclear Regulatory Commission Ms. C. Haney, Regional Administrator Mr. M. D. Orenak, NRR Project Manag er- Hatch Mr. D. H. Hardage, Senior Resident Inspect or- Hatch E-2

Edwin I. Hatch Nuclear Plant - Unit 1 Full Structural Weld Overlays on Reactor Recirculation and Residual Heat Removal Systems Nondestructive Examination Results - Spring 2016 Outage (1 R27)
Enclosure Hatch Unit 1 Weld Overlay Examination Results and Repairs during the 1R27 Outage

Enclosure to NL-16-0421 Hatch Unit 1 Weld Overlay Examination Results and Repairs during the 1R27 Outage Weld                                    Sacrificial   Completed WOL Base Metal PT                                                  POl UT Exam           Post-WOL Overlay                                   Layer PT             PT Results/Repairs                                               Results/Repairs         Repair  Remarks
{WOL) No.                                   Results      Results/Repairs                                 Exams 1831-1 RC-                NRI                  NRI               NRI        The original axially-          N/A      N/A 12BR-C-5                                                                    oriented UT indication first observed during the 1988 outage was not observed during the 2016 (1 R27) outage. An embedded reflector in the original weld material was also noted. This indication was acceptable per ASME Section XI, Table IWB-3514-2.
NRI - No Recordable Indications E-1

Enclosure to NL-16-0421 Hatch Unit 1 Weld Overlay Examination Results and Repairs during the 1R27 Outages Weld                                     Sacrificial Completed WOL                                Post-WOL Base Metal PT                                                PDI UT Exam Overlay                                   Layer PT           PT                                     Repair  Remarks Results/Repairs                                             Results/Repairs (WOL) No.                                    Results    Results/Repairs                               Exams 1831-1RC-     Two linear PT indications        NRI             NRI          The UT examination of       N/A      N/A 12BR-E-5      larger than the 1/16-inch                                     the new WOL resulted in criteria per lSI Alternative                                  six indications recorded.
15-01 were observed: (1) a                                    Four fabrication flaws in 1-1 /8-inch linear indication                                 the 52M weld overlay in the weld overlay remnant                                   which had no measurable and (2) a %-inch linear                                       through-wall and were indication in the dissimilar                                  less than 3-inches in metal weld within 1/8-inch                                    length. Also observed of the P3 ferritic material.                                 was a fabrication flaw in Grinding was performed on                                    the original Alloy 182 the indications but it did not                                nozzle buttering. These reduce the flaw lengths to                                   five indications were an acceptable size. These                                    acceptable per ASME PT indications are aligned                                   Section XI, Table IWB-azimuthally with the 2006                                    3514-2. The original and 2016 UT indications.                                     axially-oriented UT Resolution consisted of a                                    indication first observed combined seal weld repair                                     during the 1988 outage of shielded metal arc                                         had advanced to the welding (SMAW) on the                                         repaired area but did not weld overlay remnant and                                      go into the 2016 weld gas tungsten arc welding                                      overlay material. The UT (GTAW) on the dissimilar                                      data for weld 1831-1 RC-metal weld surface                                            12BR-E-5 has been temperbead. PT was                                            shared with EPRI NDE performed on 02-21 (after                                     Center personnel for the 48-hour hold) with no                                     further evaluation and recordable indications.                                       review to support a future potential industry i
recommendation.
NRI - No Recordable Indications E-2

Enclosure to NL-16-0421 Hatch Unit 1 Weld Overlay Examination Results and Repairs during the 1R27 Outages Weld Overlay         Base Metal PT           Sacrificial   Completed WOL                                Post-WOL Layer PT             PT                 POl UT Exam (WOL) No.           Results/Repairs                                                Results/Repairs      Repair  Remarks Results      Results/Repairs                               Exams 1E11-1 AHA-               NRI                   NRI               NRI         The original axially-       N/A      N/A 24A-R-12-13                                                                   oriented UT indication on (NewWO L                                                                     Weld 13 which was first covers both                                                                   observed during the 1984 welds 12 and                                                                 outage was not observed 13}                                                                          during the 2016 (1 R27) outage. UT fabrication flaws were noted in the original weld 12 (Valve to Pipe) and the valve body 00 clad. These indications were acceptable per ASME Section XI, Table IWB-3514-2.
NRI- No Recordable Indications E-3

Charles R. Pierce               Southern Nuclear Regulatory Affairs Director     Operating Company, Inc.
40 Inverness Center Parkway Post Office Box 1295 Birmingham, AL 35242 Tel 205.992.7872                          SOUTHERN * \
NUCLEAR Fax 205.992.7601 A SOUTHERN COMPANY MAR 1 7 2016 Docket Nos.: 50-321                                                    NL-16-0421 U. S. Nuclea r Regulatory Commi ssion A TIN: Docum ent Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclea r Plant- Unit 1 Full Structural Weld Overlays on Reacto r Recirculation and Residual Heat Removal System s Nondestructive Examination Result s- Spring 2016 Outage (1R27)
Ladies and Gentlemen:
By letter dated Decem ber 18, 2015, the Nuclea r Regula tory Commi ssion (NRC) approv ed the use of inservice inspection (lSI) Alternative HNP-ISI-ALT-1 5-01.
This Alternative allowed the installation of full structural weld overlay s (FSWOL) on four welds at Edwin I. Hatch Nuclea r Plant (HNP) Unit 1 during the spring 2016 refueling outage. Below is the lSI weld identification numbe r for each of the four welds:
* 1B31-1 RC-12B R-C-5
* 1B31-1 RC-12B R-E-5
* 1E11-1 RHR-2 4A-R-1 2
* 1E11-1 RHR-2 4A-R-1 3 The lSI Alternative stated (in part) that Southern Nuclea r Operating Compa ny (SNC) ''will provide the NRC, within 14 days after the completion of the ultrasonic examination of the weld overlay installations, (1) the examination results of the weld overlays, and (2) a discussion of any repairs to the overlay materia l and/or base metal and the reason for repair."
The nondestructive examination (NDE) was completed on March 6, 2016.
The attache d Table 1 docum ents the examination results and includes a description of any repairs and the reasons for the repairs. These NDE examination results suppor t the position that the weld overlays are acceptable for service The Alternative requires the lSI ultrasonic examination to be repeate d in either the 1 R28 or the 1R29 outage. This letter satisfies the 14-day examin ation reporting requirements.

U.S. Nuclear Regulatory Commission NL  Page2 This letter contains no NRC commitments. If you have any questions, please contact Ken McElroy at (205) 992-7369.
Respectfully submitted,
: c. -R. B>>
C. R. Pierce Regulatory Affairs Director CRP/RMJ

==Enclosure:==
Hatch Unit 1 Weld Overlay Examination Results and Repairs during the 1R27 Outage cc:   Southern Nuclear Operating Company Mr. S. E. Kuczynski, Chairman, President & CEO Mr. D. G. Best, Executive Vice President & Chief Nuclear Officer Mr. D. R. Vineyard, Vice Preside nt- Hatch Mr. M. D. Meier, Vice Preside nt- Regulatory Affairs Mr. D. R. Madison, Vice Preside nt- Fleet Operations Mr. B. J. Adams, Vice Preside nt- Engineering Mr. G. L. Johnson, Regulatory Affairs Manager - Hatch RTYPE: CHA02.004 U.S. Nuclear Regulatory Commission Ms. C. Haney, Regional Administrator Mr. M. D. Orenak, NRR Project Manag er- Hatch Mr. D. H. Hardage, Senior Resident Inspect or- Hatch E-2

Edwin I. Hatch Nuclear Plant - Unit 1 Full Structural Weld Overlays on Reactor Recirculation and Residual Heat Removal Systems Nondestructive Examination Results - Spring 2016 Outage (1 R27)
Enclosure Hatch Unit 1 Weld Overlay Examination Results and Repairs during the 1R27 Outage

Enclosure to NL-16-0421 Hatch Unit 1 Weld Overlay Examination Results and Repairs during the 1R27 Outage Weld                                    Sacrificial   Completed WOL Base Metal PT                                                  POl UT Exam           Post-WOL Overlay                                   Layer PT             PT Results/Repairs                                               Results/Repairs         Repair  Remarks
{WOL) No.                                   Results      Results/Repairs                                 Exams 1831-1 RC-                NRI                  NRI               NRI        The original axially-          N/A      N/A 12BR-C-5                                                                    oriented UT indication first observed during the 1988 outage was not observed during the 2016 (1 R27) outage. An embedded reflector in the original weld material was also noted. This indication was acceptable per ASME Section XI, Table IWB-3514-2.
NRI - No Recordable Indications E-1

Enclosure to NL-16-0421 Hatch Unit 1 Weld Overlay Examination Results and Repairs during the 1R27 Outages Weld                                     Sacrificial Completed WOL                                Post-WOL Base Metal PT                                                PDI UT Exam Overlay                                   Layer PT           PT                                     Repair  Remarks Results/Repairs                                             Results/Repairs (WOL) No.                                    Results    Results/Repairs                               Exams 1831-1RC-     Two linear PT indications        NRI             NRI          The UT examination of       N/A      N/A 12BR-E-5      larger than the 1/16-inch                                     the new WOL resulted in criteria per lSI Alternative                                  six indications recorded.
15-01 were observed: (1) a                                    Four fabrication flaws in 1-1 /8-inch linear indication                                 the 52M weld overlay in the weld overlay remnant                                   which had no measurable and (2) a %-inch linear                                       through-wall and were indication in the dissimilar                                  less than 3-inches in metal weld within 1/8-inch                                    length. Also observed of the P3 ferritic material.                                 was a fabrication flaw in Grinding was performed on                                    the original Alloy 182 the indications but it did not                                nozzle buttering. These reduce the flaw lengths to                                   five indications were an acceptable size. These                                    acceptable per ASME PT indications are aligned                                   Section XI, Table IWB-azimuthally with the 2006                                    3514-2. The original and 2016 UT indications.                                     axially-oriented UT Resolution consisted of a                                    indication first observed combined seal weld repair                                     during the 1988 outage of shielded metal arc                                         had advanced to the welding (SMAW) on the                                         repaired area but did not weld overlay remnant and                                      go into the 2016 weld gas tungsten arc welding                                      overlay material. The UT (GTAW) on the dissimilar                                      data for weld 1831-1 RC-metal weld surface                                            12BR-E-5 has been temperbead. PT was                                            shared with EPRI NDE performed on 02-21 (after                                     Center personnel for the 48-hour hold) with no                                     further evaluation and recordable indications.                                       review to support a future potential industry i
recommendation.
NRI - No Recordable Indications E-2

Enclosure to NL-16-0421 Hatch Unit 1 Weld Overlay Examination Results and Repairs during the 1R27 Outages Weld Overlay         Base Metal PT           Sacrificial   Completed WOL                                Post-WOL Layer PT             PT                 POl UT Exam (WOL) No.           Results/Repairs                                                Results/Repairs      Repair  Remarks Results      Results/Repairs                               Exams 1E11-1 AHA-               NRI                   NRI               NRI         The original axially-       N/A      N/A 24A-R-12-13                                                                   oriented UT indication on (NewWO L                                                                     Weld 13 which was first covers both                                                                   observed during the 1984 welds 12 and                                                                 outage was not observed 13}                                                                          during the 2016 (1 R27) outage. UT fabrication flaws were noted in the original weld 12 (Valve to Pipe) and the valve body 00 clad. These indications were acceptable per ASME Section XI, Table IWB-3514-2.
NRI- No Recordable Indications E-3}}