ML20216B021

Special Rept:On 980325,determined That Loose Parts Monitoring Sys Being Inoperable for Greater than Thirty Days.Caused by Incorrect Testing.All Channels of Loose Parts Monitoring Sys Tested Utilizing Revised Test Method

ML20216B021
Person / Time
Site:	Catawba
Issue date:	04/06/1998
From:	Gordon Peterson DUKE POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9804130351
Download: ML20216B021 (3)

Text

• e Duke Power Company A Duk,En,rgy Compey Catawba Nudear Station enw 4800 Concord Road

, York, SC 29745 Gary R. Peserson (803) 831-4251 omCE Via 1%sident (803) 831-3426 FAX April 6, 1998 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001

SUBJECT:

Duke Energy Corporation Catawbr. Nuclear Station Units 1 and 2 Docket No. 50-413/414 Special Report Loose Parts Monitoring System Pursuant to Selected Licensee Commitment 16.7-4 and Technical Specification 6.9.2, this Special Report is being submitted due to all channels of the Loose Parts Monitoring System being inoperable for greater than thirty days.

On March 25, 1998 it was determined that " Analog Channel l Operational Testing" of the Catawba Nuclear Station Loose I

Parts Monitoring SystoA was not in literal compliance with Selected Licensee Commitment 16.7-4. Required testing had not been performed correctly. As a renult, operability was not demonstrated for all channels of the Loose Parts Monitoring System for a large part of the time since the j

current system was installed approximately three years ago.

l All channels of Loose Parts Monitoring on both Unit 1 and Unit 2 were declared inoperable on March 25, 1998. Revised testing performed on April 1, 1998 confirmed operability of f the system. I 7 Selected Licensee Commitment 16.7-4 Testing Rsquirement a.2 requires Analog Channel Operational Testing of each channel of the Loose Parts Monitoring System at least once per 31 days. The Technical Specifications give the following definition for an Analog Channel Operational Test:

'])djl "An Analog Channel Operational Test shall be the injection of a simulated signal into the channel as close to the sensor as practicable to verify operability of the alarm, interlock and/or trip functions.

9804130351 900406 PDR ADOCK 05000413 S PDR J

[

l -

l l

The analog channel operational test shall include adjustments, as necessary, of l the alarm, interlock and/or trip setpoints

! such that the setpoints are within the l required range and accuracy."

1 l

The testing as it has been performed does not actually inject a signal. A test that does inject a signal is done during outages and after any maintenance as a " functional )

J test". Therefore for 31 days after each of these tests the l

system would have been in compliance with Selected Licensee '

Commitment 16.7-4.

All channels of the Loose Parts Monitoring System were tested utilizing a revised test method that does " inject" a signal. Unit 1 and Unit 2 systems were tested on April 1, 1998. All channels operated correctly. Therefore the system l would have performed its intended function even though it I was technically inoperable.

Questions on this Special Report may be directed to J.W. i Glenn at (803) 831-3051. l l

Very truly you ,

fr_-

i G.R.

. W Peterson ,

1 l

l

/

l 4

l 1

l

xc:

L. A. Reyes U. S. Nuclear Regulatory Commission Regional Administrator, Region II Atlanta Federal Center 61 Forsyth St., SW, suite 23T85 Atlanta, GA 30303 P. S. Tam NRC Senior Project Manager (CNS)

U. S. Nuclear Regulatory Commission Mail Stop O-14H25 Washington, DC 20555-0001 D. J. Roberts Senior Resident Inspector U. S. Nuclear Regulatory Commission Catawba Nuclear Site i

l i

l