ML051530508
| ML051530508 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 06/02/2005 |
| From: | Grecheck E Dominion Nuclear Connecticut |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 05-331, BL-04-001 | |
| Download: ML051530508 (6) | |
Text
Dominion Nuclear Connecticut, Inc.
~ l i l l ~ t o t i c Power Station Ibpc Icrry Road
\\~.ite:ti)rd, CYT 06.585 June 2, 2005 U. S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 1 1555 Rockville Pike Rockville, MD 20852-2738 k
Y borninion.
Serial No.05-331 NLOS/PRW Rev. 0 Docket No. 50-336 License No. DPR-65 DOMINION NUCLEAR CONNECTICUT, INC.
MILLSTONE POWER STATION UNIT 2 USED IN THE FABRICATION OF PRESSURIZER PENETRATIONS AND STEAM SPACE PIPING CONNECTIONS AT PRESSURIZED WATER REACTORS NRC BULLETIN 2004-01, INSPECTION OF ALLOY 82/182/600 MATERIALS 60 DAY REPORT In a letter dated May 28, 2004, the NRC issued Bulletin 2004-01. The bulletin requested that within 60 days of plant restart following the next inspection of the Alloy 82/182/600 pressurizer penetrations and steam space piping connections that a report be submitted to the NRC. This report was to confirm that the inspections described in the response to item (l)(c) of the Bulletin had been completed and to provide a description of the as-found condition of the pressurizer shell, any findings of relevant indications of through-wall leakage, followup NDE performed to characterize flaws in leaking penetrations or steam space piping connections, a summary of all relevant indications found by NDE, a summary of the disposition of any findings of boric acid, and any corrective actions taken and/or repairs made as a result of the indications found.
The attachment to this letter provides the Dominion Nuclear Connecticut, Inc. 60 day report described above for Millstone Power Station Unit 2.
Should you have any questions regarding the report, please contact Mr. Paul R.
Willoughby at (804) 273-3572.
Very truly yours, I?
?$A-Eugene S. Grecheck Vice President - Nuclear Support Services Attach men t Commitments: None
Serial No.05-331 Docket No. 50-336 BL 2004-01 60 Day Report Attachment Page 2 of 3 cc:
US. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406-1415 Mr. V. Nerses Senior Project Manager - Millstone Unit 2 One White Flint North Mail Stop 8 C2 1 1555 Rockville Pike Rockville, MD 20852-2738 Mr. S. M. Schneider NRC Senior Resident Inspector Millstone Power Station
Serial No.05-331 Docket No. 50-336 BL 2004-01 60 Day Report Attachment Page 3 of 3 COMMONWEALTH OF VIRGINIA
)
1 COUNTY OF HENRICO
)
The foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, today by Eugene S. Grecheck, who is Vice President -
Nuclear Support Services of Dominion Nuclear Connecticut, Inc. He has affirmed before me that he is duly authorized to execute and file the foregoing document in behalf of those companies, and that the statements in the document are true to the best of his knowledge and belief.
n6 Acknowledged before me this d = day of d 0. e
,2005.
My Commission Expires:
34 2009.
Notary Public (SEAL)
Serial No.05-331 Docket No. 50-336 ATTACHMENT NRC BULLETIN 2004-01 INSPECTION OF ALLOY 82/182/600 MATERIALS USED IN THE FABRICATION OF PRESSURIZER PENETRATIONS AND STEAM SPACE PIPING CONNECTIONS AT PRESSURIZED WATER REACTORS 60 DAY REPORT DOMINION NUCLEAR CONNECTICUT, INC.
MILLSTONE POWER STATION UNIT 2
Serial No.05-331 Docket No. 50-336 NRC BL 2004-01 60 Day Report Attachment Page 1 of 2 NRC BULLETIN 2004-01 INSPECTION OF ALLOY 82/182/600 MATERIALS USED IN THE FABRICATION OF PRESSURIZER PENETRATIONS AND STEAM SPACE PIPING CONNECTIONS AT PRESSURIZED WATER REACTORS 60 DAY REPORT In a letter dated May 28, 2004, the NRC issued Bulletin 2004-01. The bulletin requested that within 60 days of plant restart following the next inspection of the Alloy 82/182/600 pressurizer penetrations and steam space piping connections that a report be submitted to the NRC. This report was to confirm that the inspections described in the response to item (l)(c) of the Bulletin had been completed and to provide a description of the as-found condition of the pressurizer shell, any findings of relevant indications of through-wall leakage, followup NDE performed to characterize flaws in leaking penetrations or steam space piping connections, a summary of all relevant indications found by NDE, a summary of the disposition of any findings of boric acid, and any corrective actions taken and/or repairs made as a result of the indications found.
The Dominion Nuclear Connecticut, Inc. (DNC) 60 day report described above for Millstone Power Station Unit 2 (MPS2) is provided below:
ResDonse During the most recent MPS2 outage (2R16), completed May 18, 2005, a bare metal visual examination was made of the 120 pressurizer heater sleeves, 8 instrumentation nozzles and the 5 steam space piping connections. The pressurizer heater sleeve penetrations and instrumentation nozzles are made from Alloy 600 and are joined to the pressurizer with J-groove welds made with Alloy 82/182. The five steam space piping connections have welds made with Alloy 82/182. The bare metal examination of the welds and penetrations covered 360" of the weld surface or the penetration to pressurizer interface.
The examinations found one pressurizer heater sleeve, B-2, with indication of primary water on the surface. The annulus between the heater sleeve and the pressurizer was wet and there was a small amount of gummy white material present.
Analysis of the water from this location determined that the water was reactor coolant. The heater was removed from this penetration and an eddy current inspection of the sleeve performed. The eddy current inspection identified one axial through wall indication about 1/2" long from the bottom of the J-groove weld. The pressurizer heater was reinstalled and a mechanical nozzle seal assembly (MNSA) was installed to seal the leakage consistent with Relief Request RR-89-43 which was approved by the NRC on October 28,2003.
Serial No.05-331 Docket No. 50-336 BL 2004-01 60 Day Report Attachment Page 2 of 2 This was the fifth MNSA clamp installed on the Millstone Unit 2 pressurizer. DNC plans to replace the MPS2 pressurizer at the next refueling outage, 2R17, currently scheduled for the fall, 2006.