ML20199J120

Informs That Encl Questions Were Transmitted by Fax on 990121 to a Jones-Young of Duke Energy Corp,In Order to Prepare for Upcoming Telephone Call.Memo & Encl Do Not Convey Formal Request for Info or Represent NRC Position

ML20199J120
Person / Time
Site:	Catawba
Issue date:	01/21/1999
From:	Tam P NRC (Affiliation Not Assigned)
To:	NRC (Affiliation Not Assigned)
References
TAC-M97030, TAC-M97031, NUDOCS 9901260065
Download: ML20199J120 (2)

Text

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'+4***** January 21,1999 MEMORANDUM FOR: Docket File FROM: Peter S. Tam, Senior Project Manager Project Directorate 11-2 Division of Reactor Projects - 1/11 - h Office of Nuclear Reactor Regulation

SUBJECT:

CATAWBA NUCLEAR STATION - FACSIMILE TRANSMISSION, QUESTIONS ON THE LICENSEE'S RESPONSE TO GENERIC LETTER 96-05 REGARDING SAFETY-RELATED MOTOR-OPERATED VALVES (TAC M97030 and M97031)

The attached questions were transmitted by fax today to Ms. A. Jones-Young of Duke Energy Corporation (DEC) to prepare her and others for an upcoming telephone call. This memorandum and the attachment do not convey a formal request for information or represent an NRC staff position.

Docket Numbers 50-413 and 50-414 /

Distribution PUBLIC CfW[

H. Berkow a 300'57 9901260065 990121 PDR P ADOCK 05000413 PDR h h 'MsI 9.I.'

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gn lr, REQUEST FOR ADDITIONAL INFORMATION ON RESPONSE OF CATAWBA NUCLEAR STATION TO GENERIC LETTER 96-05

(

Reference:

Letter, M. S. Tuckman to NRC, March 31,1998)

1. In NRC Inspection Report No. 50-413 & 414/97-03, the staff closed its review of the motor-operated valve (MOV) program implemented at Catawba Nuclear Station (Catawba) in response to Generic Letter (GL) 89-10, " Safety-Related Motor-Operated Valve Testing and Surveillance." In the inspection report, NRC staff discussed certain aspects of the licensee's MOV program to be addressed over the long term. For example, the inspectors noted that (1) the licensee initiated an action to address the Anchor / Darling double-disc gate valve model conditions specified in the NRC safety evaluation of the Electric Power Research Institute (EPRI) Performance Prediction Model (PPM); (2) modifications were planned to increase the margins for valves 1NC31 and 2NC33; (3) additional Borg Warner gate valve testing was scheduled for the Spring 1997 outage to resolve high valve factor concerns; (4) modifications were planned to increase the margins for valves in Group WL-01 during the Spring 1997 outage; (5) the licensee initiated an action plan to improve the valve factor basis for several gate valve and globe valve groups; and (6) valve factor data scatter would be reviewed to ensure that thrust calculations use appropriate values. Please provide a summary status of the actions taken to address the specific long-term aspects of the MOV program at Catawba noted in the inspection report.

2. Please briefly describe your plans for the use of test data from the motor control center (MCC) including (1) correlation of new MCC test data to existing direct force measurements; (2) interpretation of changes in MCC test data to changes in MOV thrust and torque performance; (3) consideration of system accuracies and sensitivities to MOV degradation for both output and operating performance requirements; and (4) validation of MOV operability using MCC testing.

3. The JOG program focuses on the potential age-related increase in the thrust or torque required to operate valves under their design-basis conditions. In the NRC safety evaluation dated October 30,1997, on the JOG program, the staff specified that licensees are responsible for addressing the thrust or torque delivered by the MOV motor actuator and its potential degradation. Please should describe the plan at Catawba for ensuring adequate ac and de MOV motor actuator output capability, including consideration of recent guidance in Limitorque Technical Update 98-01 and its Supplement 1.

.