ML20247M331
| ML20247M331 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 07/26/1989 |
| From: | Blosser J UNION ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 89-09, 89-9, ULNRC-2046, NUDOCS 8908020067 | |
| Download: ML20247M331 (3) | |
Text
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.( J G] goy; cEtscraic s
Canaway Plant July;26, 1989-E
, U.-S. Nuclear Regulatory Commission Document Control' Desk
- Washington, DC 120555-ULNRC-2046 h-Gentlemen:
DOCKET NUMBER 50-483
.CALLAWAY PLANT UNIT 1 FACILITY OPERATING' LICENSE NPF-30
[..
SPECIAL REPORT 89-09
^
LOOSE-PART DETECTION-SYSTEM CHANNEL.
INOPERABLE FOR GREATER THAN 30 DAYS i
This Special Report is being submitted pursuant to Technical Specification 3.3.3.8 Action (a) concerning the inoperability of.one channel of the Loose-Part Detection System.
W
. D. Blosser Manager, Callaway Plant TPS/ LAM: jew cc: -Distribution attached V:
f' p
8908020067 890726
~PDR ADOCK 05000483
%Ay S-PDC MaRing Address P.O. Box 620, Fuhoo, MO 65251
cc distribution for ULNRC-2046-r Mr. A. Bert Davis Mr. Thomas Alexion (2 copies)
Regional Administrator Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission U. S. Nuclear Regulatory Commission Region III Mail Stop 13-E-21 799 Roosevelt Road Washington, D.C.
20555 Glen Ellyn, IL' 60137 American Nuclear Insurers Mr. O. Maynard c/o Dottie Sherman, Library Wolf Creek Nuclear Operating Corp.
The Exchange Suite 245 P. O. Box 411 270 Farmington Avenue Burlington, KS 66839 Farmington, CT 06032 Mr. Merlin Williams Manager, Electric Department Supt. of Regulatory Quality &
Missouri Public Service Commission Administrative Services P. O. Box 360 Wolf Creek Nuclear Operating Corp.
Jefferson City, MO 65102 P. O. Box 411 Burlington, KS 66839 Records Center Institute of Nuclear Power Operations Mr. R. W. DeFayette Suite 1500 Chief, Project Section 3A 1100 Circle 75 Parkway U.S. Nuclear Regulatory Commission Atlanta, CA 30339 Region III 799 Roosevelt Road NRC Resident Inspector Glen Ellyn, IL 60137 D. F. Schnell (400)
G. L. Randolph R. P. Wendling (470)
J. V. Laux A. C. Passwater/D. E. Shafer/D. J. Walker.(470)
G. A. Hughes Z170.05 (QA Record)
Z40SR.(Z170.09 Commercial Record)
M. S. Evans D. E. Young H. Wucrtenbaecher, Jr. (100)
S. L. Auston (470)(NSRB)
S. J. Bellers/D. R. Oelrichs E210.01 Z40ULNRC 3
A160.761 N. Date (Sandra Austen) (470) k i
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i SPECIAL REPORT 89-09 LOOSE-PART DETECTION SYSTEM CHANNEL INOPERABLE FOR GREATER THAN 30 DAYS This report is submitted in accordance with Technical Specification 3.3.3.8 Action (a) which states, "With one or more Loose-Part Detection System channel (s) inoperable for more than 30 days, prepare and submit a Special Report to the Commission pursuant to Specification 6.9.2 within the next 10 days outlining the cause of the malfunction and the plans for restor-ing the channel (s)'to OPERABLE status."
At 0022 CDT on 6/19/89, following a Main Control Board Loose-Part
[
annunciator and performance of.a generic work, request by utility Instrument and Controls (I&C) technicians, Channel 3 of the Loose-Part Detection System was determined to be inoperable. The plant was in Mode 1 at 100% power.
The Channel 3 accelerometer is located in the containment mounted on the reactor vessel head assembly. Initial troubleshooting of Channel 3 has determined that the problem lies with the sensor, sensor mounting or associated sensor cabling. Since the instrument sensor is connected to the reactor vessel head (thus inaccessible during power operations) further troubleshooting will not be performed until the next outage of sufficient duration. The remaining eleven channels in this system remain operable.
Until further troubleshooting has been completed, actions to be taken to prevent recurrence cannot be determined.
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