ML020580393

Annual Report of Failures & Challenges to Pressurizer Power-Operated Relief Valves & Safety Valves for the Period of 01/01 - 12/31/2001

ML020580393
Person / Time
Site:	Calvert Cliffs
Issue date:	02/21/2002
From:	Katz P Constellation Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML020580393 (2)

Text

Peter E. Katz 1650 Calvert Cliffs Parkway Plant General Manager Lusby, Maryland 20657 410 495-4101 Nuclear Constellation Calvert Cliffs Nuclear Power Plant A Member of the Constellation Energy Group February 21, 2002 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION: Document Control Desk

SUBJECT:

Calvert Cliffs Nuclear Power Plant Unit Nos. 1 & 2; Docket Nos. 50-317 & 50-318 Annual Report of Failures and Challenges to Pressurizer Power-Operated Relief Valves and Safety Valves for the Period of January 1 - December 31, 2001

REFERENCE:

(a) Calvert Cliffs Units 1 and 2 Technical Specification 5.6.6 Reference (a) requires submittal of an annual report documenting all failures and challenges to the pressurizer power-operated relief valves and safety valves. For the period January 1 - December 31, 2001 one pressurizer safety valve failure occurred. This failure occurred in April 2001 during offsite testing of Pressurizer Safety Valve 2-RV-201 subsequent to its removal from Unit 2 during the 2001 Refueling Outage. During the scheduled setpoint pressure verification testing at an offsite testing facility, the as-found setpoint pressure was above the Technical Specification allowable limit. The Technical Specifications allow an as-found maximum setpoint of 2616 psia which is two percent above the 2565 psia nominal setpoint. The as-found setpoint pressure measured at 2618 psia is approximately two percent above the 2565 psia nominal setpoint. An analysis determined that the Unit 2 reactor-plant remained within its design basis, assuming the as-found setpoint pressure of the valve. The cause of the high setpoint pressure was determined to be specific to this valve. The valve was replaced during the spring 2001 Refueling Outage. There were no challenges or failures of any other pressurizer safety valves during 2001. There were no challenges or failures of the pressurizer power-operated relief valves on either unit during 2001.

Should you have questions regarding this matter, we will be pleased to discuss them with you.

Very truly yours, for Peter E. Katz Plant General Manager PEK/ALS/bjd cc: R. S. Fleishman, Esquire H. J. Miller, NRC

Document Control Desk February 21, 2002 Page 2 J. E. Silberg, Esquire Resident Inspector, NRC Director, Project Directorate I-1, NRC R. I. McLean, DNR D. M. Skay, NRC