ML060590049
| ML060590049 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  (DPR-053, DPR-069) |
| Issue date: | 02/23/2006 |
| From: | Spina J Calvert Cliffs, Constellation Energy Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| TAC MC9583, TAC MC9584 | |
| Download: ML060590049 (9) | |
Text
James A. Spina Vice President Calvert Cliffs Nuclear Power Plant, Inc.
1650 Calvert Cliffs Parkway Lusby, Maryland 20657 410.495.4455 410.495.3500 Fax Constellation EnergyW Generation Group February 23, 2006 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
SUBJECT:
Document Control Desk Calvert Cliffs Nuclear Power Plant UnitNos. 1 & 2; DocketNos. 50-317 & 50-318 Response to Request for Additional Information Regarding Relief Request to Use Alternative Techniques for Repair of Welded Nozzles (TAC Nos. MC9583 and MC9584)
REFERENCES:
(a)
Letter from Mr. P. D. Milano (NRC) to Mr. J. A. Spina (CCNPP), dated February 3, 2006, Request for Additional Information Regarding Relief Request to Use Alternative Techniques for Repair of Welded Nozzles (TAC Nos. MC9583 and MC9584)
(b)
Letter from Mr. G. Vanderheyden (CCNPP) to Document Control Desk (NRC), dated December 21, 2005, ASME Section XI Relief Request to Use Alternative Techniques for Repair and Examination of Unacceptable Indications in Welded Nozzles By letter dated February 3, 2006 (Reference a), you requested additional information regarding Calvert Cliffs Nuclear Power Plant, Inc.'s relief request to use alternative techniques for repair and examination of unacceptable indications in welded nozzles (Reference b). Attachment (1) to this let:er provides the requested information.
Should you have questions regarding this matter, please contact Mr. L. S. Larragoite at (410) 495-4922.
Very truly yours, JAS/MJY/bjd
Attachment:
(1)
Response to NRC Request for Additional Information Regarding Relief Request to Use Alternative Techniques for Repair of Welded Nozzles cc:
P.D. Milano, NRC S. J. Collins, NRC Resident Inspector, NRC R. I. McLean, DNR ft.qlf7
ATTACHMENT (1)
RESPONSE TO NRC REQUEST FOR ADDITIONAL INFORMATION REGARDING RELIEF REQUEST TO USE ALTERNATIVE TECHNIQUES FOR REPAIR OF WELDED NOZZLES ENCLOSURE
- 1.
Framatome ANP Welding Procedure Specification 55-WP1/8/F6AW1-008 Calvert Cliffs Nuclear Power Plant, Inc.
February 23, 2006
ATTACHMENT (1)
RESPONSE TO NRC REQUEST FOR ADDITIONAL INFORMATION REGARDING RELIEF REQUEST TO USE ALTERNATIVE TECHNIQUES FOR REPAIR OF WELDED NOZZLES Requested Information 1 Submit a copy of the welding procedure specification(s) that will be usedfor weld buildup and attachment welds.
Calvert Cliffs Response The Framatome ANP Welding Procedure Specification (WPS) that is used to weld the replacement nozzles to the Reactor Coolant System (RCS) Hot Leg Pipe is enclosed. This procedure is used to make the partial penetration weld of the Stainless Steel (P8) nozzle to the Carbon Steel (Pl) pipe.
Requested Information 2 Submit a description, to the NRC staff of any non-destructive examination that will be performedfor final acceptance of each repaired instrument nozzle using the alternative technique.
Calvert Cliffs Response The partial penetration welds attaching the replacement nozzles to the pipe will be 1/2 thickness and full thickness Liquid Penetrant tested. A VT-2 examination will also be conducted at operating pressure and temperature.
1
Enclosure (1)
FRAMATOME ANP WELDING PROCEDURE SPECIFICATION 55-WP1/8/F6AW1-008 Calvert Cliffs Nuclear Power Plant, Inc.
February 23, 2006
ARE VA WELDING PROCEDURE SPECIFICATION 55-WP1/8/F6AW1 -008 Gas Tungsten-Arc Welding WELDING PROCEDURE SPECIFICATION WP118IF6AW1 Supporting Procedure Qualification Records:
PQR 7025 and PQR 7079 PREPARED BY:
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Q WLDING ENGINEER' DATE:
Z '/ 5-S06 REVIEWED BY:
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COGNIZANT ENGIN R
APPROVED BY:
SERVCES WL1MANAGER, WELDING SERVICES DATE: 2-o-06 DATE 2/t°4 February 15, 2006 Framatome ANP, an AREVA and Siemens Company Page 1 of 5
ARE VA WELDING PROCEDURE SPECIFICATION 55-WP1/8/F6AW1-008 Gas Tungsten-Arc Welding REVISION 00 01 02 03 04 05 006 007 008 RECORD OF REVISIONS DATE DESCRIPTION OF REVISION July 2,1996 Original issue November 21, 1996 Revised scope statement and preheat September 25, 2000 Revised preheat requirements December 20, 2002 Revised amperage ranges June 10, 2004 Updated logo Revised scope statement Addressed some base metal / filler metal issues (thickness, and material selection)
June 23, 2004 Changed scope statement Updated Section 2.0 to remove SPP-01 reference Returned to original base metal / filler metal thicknesses in Sections 3.0 and 4.0 and also added NF requirements Revised Section 6.0 to include NF preheat requirements Added a shielding gas specification to Section 8.0 December 16, 2005 Added NB preheat requirements for PWHT exemptions February 3, 2006 Added vertical down progression in Section 5.0 February 15, 2006 Removed Proprietary classification Corrected typos February_15,2006 FramatomeANP,anAREVAandSiemensCompany
~Page 2of 5
An WELDING PROCEDURE SPECIFICATION 55-WP1/8/F6AW1-008 A EGas Tungsten-Arc Welding AR EVA 1.0 SCOPE This welding procedure provides instructions for manual gas tungsten arc welding of P-No. I carbon steel base materials to P-No. 8 stainless steel base materials. This welding procedure does not support applications having impact requirements. This WPS shall be used in conjunction with GENERAL WELDING PROCEDURE-1 (GWP-1). Additional ASME Section III NB and NF requirements are addressed at the end of each section, if necessary.
2.0 JOINTS (QW-402)
Groove Design V & U grooves with single, double or compound bevels, fillets and repairs.
Backing Rings:
1/8" to 1/4" inclusive Materials:
P-No. 1 or P-No. 8 Root Spacing Open:
See project drawings Consumable inserts:
See project drawings Retainers Non-metallic retainers or non-fusing retainers shall not be used unless authorized by Welding Engineering.
Details Contract/project drawings shall take precedence on all weld joint details.
3.0 BASE MATERIALS (QW-403)
P-No's qualified:
All P-No. 1 to P-No. 8 materials.
Base material / weld deposit thickness range: Groove welds:
3/16" to 8" Fillet welds:
All The P-No. qualifies the equivalent S-No.
For ASME Section III NF applications, base metal thicknesses are limited to 1.5" or less. If the base metal is greater than 1.5" then the deposited weld thickness may not exceed 3/4".
February 15, 2006 Framatome ANP, an AREVA and Siemens Company Page 3of 5
DA ARE VA WELDING PROCEDURE SPECIFICATION 55-WP1/8/F6AW1-008 Gas Tungsten-Arc Welding 4.0 FILLER MATERIALS (QW-404)
Diameter:
1/16", 3/32", and 1/8" F-No. 6, A-No. 8, SFA-5.9, AWS Classification ER309 and/or ER308 Note: ER309 must be used when welding over P-No. 1 base materials.
Note: "L" grades may also be used.
Filler material must be added on each pass.
Consumable insert: F-No. 6, A-No. 8, SFA 5.30, IN 309, Class 1, 2, 3, or 5 Filler material product form:
Bare (solid) or metal cored Maximum qualified deposited weld thickness: 8" Maximum layer thickness:
1/4" 5.0 POSITIONS (QW-405)
Groove, fillet and repair welds:
Vertical weld progression:
All Uphill or downhill 6.0 PREHEAT (QW406)
Preheat temperature:
Interpass temperature:
50 OF minimum 350 OF maximum For ASME Section III with NB applications, when the material thickness is greater than 3/4", a 200 "F minimum preheat is required.
For ASME Section III with NF applications, when the material thickness is greater than 3/4", a 200 0F minimum preheat is required.
7.0 POSTWELD HEAT TREATMENT (QW-407)
None 8.0 SHIELDING GAS (QW-408)
Shielding Gas:
Purge Gas:
Trailing Gas:
Gas Composition:
Argon Flow Rate:
Argon Flow Rate:
None Flow Rate:
SG-A per SFA-5.32 10-30 CFH 3-15 CFH N/A February 15, 2006 Framatome ANP, an AREVA and Siemens Company Page 4of 5
At AREVA WELDING PROCEDURE SPECIFICATION 55-WP1/8/F6AW1-008 Gas Tungsten-Arc Welding 9.0 ELECTRICAL CHARACTERISTICS (QW-409)
Current-Polarity:
Pulsed Current:
Electrode:
Filler Metal Diameter 1/16" 3/32" 1/8" DC-SP (DCEN)
No SFA-5.12, EWTh-2 Diameter: 1/16", 3/32", or 1/8" Amps 50- 100 50 - 125 80-150 10.0 TECHNIQUE (QW-410)
String or weave:
Gas cup size:
Method of cleaning:
Method of backgouging:
Passes per side:
Chamber:
Peening:
Both
- 4 through #12 Wire brushing, grinding, filling or machining.
Mechanical or thermal Single or multiple Out of chamber Not permitted unless authorized by Welding Engineering February 15, 2006 Framatome ANP, an AREVA and Siemens Company Page 5 of 5 February 15, 2006 Framatome ANP, an AREVA and Siemens Company Page5 of 5