NG-10-0328, Response to Supplemental Request for Additional Information Related to Relief Request for 1st Period Limited Weld Examinations

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Response to Supplemental Request for Additional Information Related to Relief Request for 1st Period Limited Weld Examinations
ML101660124
Person / Time
Site: Duane Arnold NextEra Energy icon.png
Issue date: 06/15/2010
From: Costanzo C
NextEra Energy Duane Arnold
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
NG-10-0328
Download: ML101660124 (17)
v • d • e


Text

. ----~- ~ ~----

NEXTera" ENERGY~

DUANE ARNOLD June 15,2010 NG-10-0328 10 CFR 50.55a u.s. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555-0001 Duane Arnold Energy Center Docket 50-331 License No. DPR-49 Response to Supplemental Request for Additional Information Related to Relief Request for 1st Period Limited Weld Examinations

Reference:

1. Letter, Richard L. Anderson (NextEra Energy Duane Arnold, LLC) to Document Control Desk (USNRC), Relief Request for 1st Period Limited Weld Examinations, dated July 30, 2009, NG 0539 (ML092230346)
2. Letter, Christopher R. Costanzo (NextEra Energy Duane Arnold, LLC) to Document Control Desk (USNRC), Response to Request for Additional Information Related to Relief Request for 1st Period Limited Weld Examinations, dated February 25, 2010, NG-10-0094 (ML100680431)

Reference 1 provided a request for relief regarding the 1st period limited weld examinations. This relief is requested for the Fourth Ten year Interval of the Inservice Inspection Program for the Duane Arnold Energy Center (DAEC), which ends on February 21,2014.

Reference 2 provided additional information regarding the request for relief regarding the 1st period limited weld examinations of Reference 1.

In an email dated May 24,2010, the Staff issued another request for additional information regarding Reference 1. The response to this email is provided in the enclosure to this letter.

NextEra Energy Duane Arnold, LLC requests approval of the requests of Reference 1 by July 30, 2010.

NextEra Energy Duane Arnold, LLC, 3277 DAEC Road , Palo, IA 52324

NG-10-0328 June 15, 2010 Page 2 of 2 This letter contains no new commitments nor revises any previous commitments.

If you have any questions, please contact Steve Catron at (319) 851-7234.

Christopher R. Costanzo Vice President, Duane Arnold Energy Center NextEra Energy Duane Arnold, LLC Enclosure

Enclosure to NG-10-0328 Page 1 of 4 Enclosure Response to Request for Additional Information Related to Relief Request for 1st Period Limited Weld Examinations

Enclosure to NG-10-0328 Page 2 of 4 Response to Request for Additional Information Related to Relief Request for 1st Period Limited Weld Examinations NRC Question #1:

For CUA-J024 weld in the Reactor Water Cleanup System, this is a weld between a forged penetration and a cast valve, 50% coverage was probably the best coverage to be expected by the inspection. You have said in the July 30, 2009 submittal that 50% coverage is OK because the weld is not susceptible to IGSCC. But the only reason that weld is in RI Category 2 is because it is susceptible to IGSCC, otherwise, it is Category 4. Please clarify this apparent discrepancy.

NextEra Energy Duane Arnold Response:

The CUA-J024 weld in the Reactor Water Cleanup System is a Category 4 weld.

Please refer to Attachment 1 for 4th interval inspection information for Category 4 welds from the Duane Arnold Energy Center (DAEC).

NRC Question #2:

There is an inconsistency in the documentation provided. Page 1 of 1 on report no.

UT-07-029 UT Calibration/Examination shows the exam angle of the Search Unit as 60o, and the mode is listed as shear. But Page 2 of 2 on UT-07-028 Supplemental Report shows a sketch of the inspection configuration and it includes a notation that the transducer was at 60o RL, not 60o, shear mode. Please clarify.

NextEra Energy Duane Arnold Response:

On UT-07-029, the mode should have been listed as Longitudinal. This is a typographical error; the datasheet has been corrected and an image of the corrected datasheet is provided as Attachment 2.

NRC Question #3:

Please clearly identify the wave modality, insonification angles, and scan directions used for all ultrasonic examinations.

Enclosure to NG-10-0328 Page 3 of 4 NextEra Energy Duane Arnold Response:

The following table is provided with information from the examination datasheets:

Weld Wave Mode Insonification Scan Direction Angles HCC-C001 Refracted Longitudinal 60° Upstream (Axial), CW &

CCW (Parallel)

RMA-J004 Shear 45° Downstream, CW & CCW Longitudinal 60° Downstream CUA-J024 Shear 45° Upstream, CW & CCW Longitudinal 60° Upstream NRC Question #4:

Did the inspection exam category R-A meet ASME Code,Section XI, App VIII qualification requirements?

NextEra Energy Duane Arnold Response:

Yes, ASME Section XI Code Case N-578 paragraph -2500 (c) states Examination qualification and methods and personnel qualifications shall be in accordance with the Edition and Addenda of Section XI specified in the Owners Inservice Inspection Program.

NRC Question #5:

Supply a description of the materials of construction for the B1.40 RV head to flange weld and the R1.16 RMA-J004 weld.

NextEra Energy Duane Arnold Response:

Please refer to the following table for materials of construction:

Weld Materials HCC-C001 A508 Class 2 - head flange SA533 Class 1 GR. B - side plate RMA-J004 A182 304SS - sock-o-let A240 304SS - pipe

Enclosure to NG-10-0328 Page 4 of 4 NRC Question #6:

Provide a better copy of the photo in submittal for CUA-J024 weld.

NextEra Energy Duane Arnold Response:

Please refer to Attachment 3 for photos.

NRC Question #7:

The original July 30, 2009 submittal includes the following statement:

The Nondestructive Examination (NDE) procedure used for this examination incorporates the examination techniques qualified under Appendix Vlll of the ASME Section XI Code by the Performance Demonstration Initiative (PDI).

That procedure was approved under Relief Request NDE-R008 on January 31, 2007.

The January 31, 2007 document provides authorization to use an alternative to Code requirements, not NRC approval of a procedure. Reword this paragraph to reflect the fact that the NRC authorized the use of the alternative for the remainder of the 4th ISI interval at DAEC.

NextEra Energy Duane Arnold Response:

NextEra Energy Duane Arnold hereby rewords the statement in Reference 1 as follows (change in italics):

The Nondestructive Examination (NDE) procedure used for this examination incorporates the examination techniques qualified under Appendix Vlll of the ASME Section XI Code by the Performance Demonstration Initiative (PDI).

That alternative was approved under Relief Request NDE-R008 on January 31, 2007.

References:

1. Letter, Richard L. Anderson (NextEra Energy Duane Arnold, LLC) to Document Control Desk (USNRC), Relief Request for 1st Period Limited Weld Examinations, dated July 30, 2009, NG-09-0539 (ML092230346)
2. Letter, Christopher R. Costanzo (NextEra Energy Duane Arnold, LLC) to Document Control Desk (USNRC), Response to Request for Additional Information Related to Relief Request for 1st Period Limited Weld Examinations, dated February 25, 2010, NG-10-0094 (ML100680431)

Attachment 1 to NG-10-0328 Attachment 1 4th Interval History for Category 4 Welds 5 Pages Follow

Duane Arnold Nuclear Plant 4th Interval Category 4 Period 1 Period 2 Period 3 Category, Summary No. Dwg/ISO No.

Item No., CompID Outage / Scope / Method Comp. Desc.

Class System Type / Procedure Code Case RFO-20-1 RFO-21 RFO-22 RFO-23 R-A 61200-RI RFO-21 / ISI / UT / / ACP1211.38 1.2-07 SHT-01 ISI - c - - - - - - - - - -

R1.16-4 CSA-F002A SE EXT - SAFEEND AUG - c - - - - - - - - - -

1 CS R-A 61400-RI RFO-21 / ISI / UT / / ACP1211.38 1.2-07 SHT-01 ISI - c - - - - - - - - - -

R1.16-4 CSA-F004 PIPE - PIPE AUG - c - - - - - - - - - -

1 CS R-A 61600-RI RFO-21 / AUG / UT / / 1.2-07 SHT-01 ISI - - - - s - - - - - - -

R1.16-4 CSA-J003 ACP1211.20 PIPE - PIPE AUG - c - - - - - - - - - -

1 CS RFO-22 / ISI / UT / / ACP1211.20 R-A 64500-RI RFO-20-1 / ISI / UT / UT / 1.2-08 SHT-01 ISI c - - - - - - - - - - -

R1.16-4 CSB-F002A ACP1211.38 SAFEEND - S/E Extension AUG c - - - - - - - b - - -

1 CS RFO-20-1 / ISI / UT / UT /

ACP1211.38 RFO-20-1 / ISI / UT / UT /

ACP1211.38 RFO-20-1 / ISI / UT / UT /

ACP1211.38 R-A 64700-RI RFO-22 / ISI / UT / / ACP1211.38 1.2-08 SHT-01 ISI - - - - s - - - - - - -

R1.16-4 CSB-F004 PIPE - PIPE AUG c - - - - - - - b - - -

1 CS R-A 64900-RI RFO-20-1 / ISI / UT / UT / 1.2-08 SHT-01 ISI c - - - - - - - - - - -

R1.16-4 CSB-J003 ACP1211.20 PIPE AUG c - - - - - - - b - - -

1 CS RFO-20-1 / ISI / UT / UT /

ACP1211.20 R-A 74600-RI RFO-20-1 / ISI / UT / UT / 1.2-11A SHT-01 ISI c - - - - - - - - - - -

R1.16-4 CUA-J024 ACP1211.20 PIPE - MOTOR OPERATED GATE AUG c - - - - - - - b - - -

1 CU RFO-20-1 / ISI / UT / UT /

ACP1211.20 R-A 103000-RI RFO-22 / AUG / UT / / 1.2-19A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCA-F002 Zetec_OmniScanPA_03 NOZZLE - SAFEEND AUG c - - - b - - - - - - -

1 RC R-A 103200-RI 1.2-19A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCA-J003 SAFEEND - PIPE AUG - - - - - - - - - - - -

1 RC 6/7/2010 ScheduleWorks V. 8.1 Page 1 - 5

Duane Arnold Nuclear Plant 4th Interval Category 4 Period 1 Period 2 Period 3 Category, Summary No. Dwg/ISO No.

Item No., CompID Outage / Scope / Method Comp. Desc.

Class System Type / Procedure Code Case RFO-20-1 RFO-21 RFO-22 RFO-23 R-A 103500-RI RFO-22 / ISI / UT / / ACP1211.20 1.2-19A SHT-01 ISI - - - - s - - - - - - -

PIPE - 90 DEGREE LONG RADIUS R1.16-4 RCA-J004 ELBOW AUG - - - - - - - - - - - -

1 RC R-A 103900-RI RFO-22 / ISI / UT / / ACP1211.20 1.2-19A SHT-01 ISI - - - - s - - - - - - -

90 DEGREE LONG RADIUS ELBOW -

R1.16-4 RCA-J005 PIPE AUG - - - - - - - - - - - -

1 RC R-A 104500-RI 1.2-19A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCA-J006 PIPE AUG - - - - - - - - - - - -

1 RC R-A 104800-RI 1.2-19A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCA-J008 PIPE AUG - - - - - - - - - - - -

1 RC R-A 105100-RI RFO-23 / ISI / / / 1.2-19A SHT-01 ISI - - - - - - - - s - - -

PIPE - 90 DEGREE LONG RADIUS R1.16-4 RCA-J012 ELBOW AUG - - - - - - - - - - - -

1 RC R-A 105500-RI 1.2-19A SHT-01 ISI - - - - - - - - - - - -

90 DEGREE LONG RADIUS ELBOW -

R1.16-4 RCA-J013 MOTOR OPERATED GATE AUG - - - - - - - - - - - -

1 RC R-A 105700-RI 1.2-19A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCA-J015 MOTOR OPERATED GATE - PIPE AUG - - - - - - - - - - - -

1 RC R-A 106400-RI RFO-22 / ISI / UT / / ACP1211.20 1.2-19A SHT-01 ISI - - - - s - - - - - - -

PIPE - 90 DEGREE SHORT RADIUS R1.16-4 RCA-J021 ELBOW AUG - - - - - - - - - - - -

1 RC R-A 106800-RI 1.2-19A SHT-01 ISI - - - - - - - - - - - -

90 DEGREE SHORT RADIUS ELBOW -

R1.16-4 RCA-J022 UNKNOWN PUMP TYPE - AUG - - - - - - - - - - - -

1 RC 6/7/2010 ScheduleWorks V. 8.1 Page 2 - 5

Duane Arnold Nuclear Plant 4th Interval Category 4 Period 1 Period 2 Period 3 Category, Summary No. Dwg/ISO No.

Item No., CompID Outage / Scope / Method Comp. Desc.

Class System Type / Procedure Code Case RFO-20-1 RFO-21 RFO-22 RFO-23 R-A 107000-RI 1.2-19A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCA-J024 UNKNOWN PUMP TYPE - PIPE AUG - - - - - - - - - - - -

1 RC R-A 107500-RI 1.2-19A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCA-J028 PIPE - MOTOR OPERATED GATE AUG - - - - - - - - - - - -

1 RC R-A 107700-RI 1.2-19A SHT-01 ISI - - - - - - - - - - - -

MOTOR OPERATED GATE - 90 DEGREE R1.16-4 RCA-J030 LONG RADIUS ELBOW AUG - - - - - - - - - - - -

1 RC R-A 108100-RI 1.2-19A SHT-01 ISI - - - - - - - - - - - -

90 DEGREE LONG RADIUS ELBOW -

R1.16-4 RCA-J032 PIPE AUG - - - - - - - - - - - -

1 RC R-A 108800-RI 1.2-19A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCA-J038 PIPE AUG - - - - - - - - - - - -

1 RC R-A 109300-RI RFO-20-1 / ISI / UT / UT / 1.2-19A SHT-01 ISI c - - - - - - - - - - -

R1.16-4 RCA-J041 ACP1211.20 PIPE - TEE AUG - - - - - - - - - - - -

1 RC RFO-20-1 / ISI / UT / UT /

ACP1211.20 RFO-20-1 / ISI / UT / UT /

ACP1211.20 RFO-20-1 / ISI / UT / UT /

ACP1211.20 R-A 126100-RI RFO-21 / ISI / UT / / ACP1211.38 1.2-21A SHT-01 ISI - c - - - - - - - - - -

R1.16-4 RCB-F002 RFO-21 / ISI / UT / / NOZZLE - SAFEEND AUG c B - - - - - - - - - -

1 RC Zetec_OmniScanPA_03 R-A 126300-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCB-J003 SAFEEND - PIPE AUG - - - - - - - - - - - -

1 RC R-A 126700-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

PIPE - 90 DEGREE LONG RADIUS R1.16-4 RCB-J004 ELBOW AUG - - - - - - - - - - - -

1 RC 6/7/2010 ScheduleWorks V. 8.1 Page 3 - 5

Duane Arnold Nuclear Plant 4th Interval Category 4 Period 1 Period 2 Period 3 Category, Summary No. Dwg/ISO No.

Item No., CompID Outage / Scope / Method Comp. Desc.

Class System Type / Procedure Code Case RFO-20-1 RFO-21 RFO-22 RFO-23 R-A 127300-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

90 DEGREE LONG RADIUS ELBOW -

R1.16-4 RCB-J005 PIPE AUG - - - - - - - - - - - -

1 RC R-A 127600-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCB-J006 PIPE - TEE AUG - - - - - - - - - - - -

1 RC R-A 128000-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCB-J007 TEE - PIPE AUG - - - - - - - - - - - -

1 RC R-A 128800-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

PIPE - 90 DEGREE LONG RADIUS R1.16-4 RCB-J015 ELBOW AUG - - - - - - - - - - - -

1 RC R-A 129200-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

90 DEGREE LONG RADIUS ELBOW -

R1.16-4 RCB-J016 MOTOR OPERATED GATE AUG - - - - - - - - - - - -

1 RC R-A 129400-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCB-J018 MOTOR OPERATED GATE - PIPE AUG - - - - - - - - - - - -

1 RC R-A 130100-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

PIPE - 90 DEGREE SHORT RADIUS R1.16-4 RCB-J024 ELBOW AUG - - - - - - - - - - - -

1 RC R-A 130500-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

90 DEGREE SHORT RADIUS ELBOW -

R1.16-4 RCB-J025 UNKNOWN PUMP TYPE - AUG - - - - - - - - - - - -

1 RC R-A 130700-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCB-J027 UNKNOWN PUMP TYPE - PIPE AUG - - - - - - - - - - - -

1 RC 6/7/2010 ScheduleWorks V. 8.1 Page 4 - 5

Duane Arnold Nuclear Plant 4th Interval Category 4 Period 1 Period 2 Period 3 Category, Summary No. Dwg/ISO No.

Item No., CompID Outage / Scope / Method Comp. Desc.

Class System Type / Procedure Code Case RFO-20-1 RFO-21 RFO-22 RFO-23 R-A 131200-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCB-J031 PIPE - MOTOR OPERATED GATE AUG - - - - - - - - - - - -

1 RC R-A 131400-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

MOTOR OPERATED GATE - 90 DEGREE R1.16-4 RCB-J033 LONG RADIUS ELBOW AUG - - - - - - - - - - - -

1 RC R-A 131800-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

90 DEGREE LONG RADIUS ELBOW -

R1.16-4 RCB-J035 PIPE AUG - - - - - - - - - - - -

1 RC R-A 132500-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCB-J041 PIPE AUG - - - - - - - - - - - -

1 RC R-A 133000-RI 1.2-21A SHT-01 ISI - - - - - - - - - - - -

R1.16-4 RCB-J044 PIPE - TEE AUG - - - - - - - - - - - -

1 RC R-A 89700-RI RFO-22 / ISI / UT / / ACP1211.38 1.2-14 SHT-01 ISI - - - - s - - - - - - -

R1.16-4 RHB-F003 PIPE - PIPE AUG - - - - - - - - - - - -

1 RH 6/7/2010 ScheduleWorks V. 8.1 Page 5 - 5

Attachment 2 to NG-10-0328 Attachment 2 Revised UT-07-029 UT Calibration/Examination 1 Page Follows

@ REnergy Sitelunit: DAEC I 1 UT Calibration1Examination Procedure: ACP1211.20 Outaae No.: RFO-20-1 Ocane Arnold Ezi-rav C;>nler Summary No.: 74600-Rl Procedure Rev.: 6 Report No.: UT-07-029 Workscope: IS1 Work Order No.: 1135836 Page:

- 1 of 1 Code: ASME 2001 Ed thru 2003 Add Cat.1ltem: R-AIR1.I 6-4 Location: RB270 Drawing No.: 1.2-11A SHT-01

Description:

PIPE - MOTOR OPERATED GATE System ID: CU Component ID: CUAJ024 SizeILength: .90" 1 15.75" ThicknesslDiameter: 0.580" 15.0" OD Limitations: - -

Sinale sided due to valve confiauration Start Time: 1416 Finish Time: 1422 Instrument Settings Search Unit Axial Orientated Search Unit Serial No.: 01LCBL Serial No.: 05-335 Calibration Signal Sound Path Manufacturer: Krautkramer Manufacturer: Reflector Amplitude % Division Sweep Model: USN 60 SW Size: 2 (7x10 mm) Shape: Rect 1" Notch 80 7.0 2.04" Delay: 0R.050 Range: 3.0" NIA M'tl CalNel: .2304 Pulser: Square Damping: 5008 Reject: 0%

Rep. Rate: AutoHigh Freq.: 2.00 MHz Filter: Fixed Mode: FullWave Wedge Style: NIA Cal. Batch: 06225 Circumferential Orientated Search Unit P

Voltage: 450 Other: Pulsewidth 250 ns Type: Ultragel I1 Calibration Signal Sweep Reflector Amplitude % Division Sound path Ax. Gain (dB): 58 Circ. Gain (dB): 58 Search Unit Cable Mfg.: Sonotech 30 P

10 Screen Div. = in. of Sound Path Type: RG-174 NIA

- Exam Batch: 06225 Length: 6' No. Conn.:

P Linearity Report No.: L-07-001 Scan Coverage O Type:

Mfg.:

P Ultragel II Sonotech Calibration Block Cal. Block No.: 5539 Upstream Downstream0 Scan dB: -64 Reference Block ReferencelSimulator Block Thickness .5"-2.0" Dia.: Flat cw

  • C C W U Scan dB: NIA- Serial No.: LMT-032 Gain Sound path Cal. Blk. Temp. 78" Temp. Tool: 253987 Exam Surface: OD Type: SS Rompas 1.43" Comp. Temp.:

- 78" Temp. Tool: 253987 Surface Condition: Blended NIA Recordable Indication(s): Yes No (If Yes, Ref. Attached Ultrasonic Indication Report.)

Results: Accept Reject Info Comments: No downstream scans due to valve configuration.

Reference Coverage plot on 45" angle report# UT-07-028.

Percent Of Coverage Obtained > 90%: 50% Reviewed Previous Data: Yes

/?, ,

Examiner Level 111-PDI ignature Date Reviewer Date Davis, Layn R 2/12/2007 Blechinger, Todd P. 3k (9 7 Examiner Level I Signature Date Site Review Pollock, Norm E. 211a2007 Dohmen, Frank E.

Other Level NAI Signature Date AN1I Review Signature '

NIA Bowers, Jeremy fiL 3-y-07

Attachment 3 to NG-10-0328 Attachment 3 CUA-J024 Weld Photos 2 Pages Follow

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