ML090570481

Deferral of Materials Reliability Program-139 Ultrasonic Inspections of Reactor Coolant Welds

ML090570481
Person / Time
Site:	Calvert Cliffs
Issue date:	02/26/2009
From:	Flaherty M Calvert Cliffs, Constellation Energy Nuclear Group
To:	Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML090570488	List: ML090570481 ML090570486
References
Download: ML090570481 (1)

Text

Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 February 26,2009 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION: Document Control Desk

SUBJECT:

Calvert Cliffs Nuclear Power Plant Unit No.2; Docket No. 50-318 Deferral of Materials Reliability Program-139 Ultrasonic Inspections of Reactor Coolant Welds

REFERENCES:

(a) Addendum E, Materials Guidelines Implementation Protocol, to NEI03-08 [Addenda], Materials Initiative Guidance, Revision 3, June 2008 (b) Material Reliability Program: Primary System Piping Butt Weld Inspection and Evaluation Guideline (MRP-139); EPRI Product Number 1010087, Final Report, July 14,2005 As required in Reference (a), the purpose of this letter is to inform you of Calvert Cliffs Nuclear Power Plant, Inc. (Calvert Cliffs) deviation from the requirement in Reference (b) to perform ultrasonic examination of all Unit 2 Alloy 82/182 butt welds that are exposed to temperatures equivalent to reactor coolant cold leg temperatures by December 31, 2010. The deviation is applicable to eight 30-inch Alloy 82/182 butt welds located at the inlet and outlet of the reactor coolant pumps. The deviation will be in effect for approximately two months as the inspections are scheduled to occur during the Unit 2 2011 refueling outage (scheduled to start in February 2011). Attachment (1) provides an executive summary of the justification for the deviation.

Should you have questions regarding this matter, please contact Mr. Jay S. Gaines at (410) 495-5219.

Very truly yours,

~'-~~~~

Mark D. Flaherty ~

Manager - Engineering Services MDF/KLG/bjd

Attachment:

(1) Summary of Calvert Cliffs Unit 2 Deviation from MRP-139 Requirements cc: D. V. Pickett, NRC Resident Inspector, NRC S. J. Collins, NRC S. Gray, DNR