ML20236Q095
| ML20236Q095 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 11/16/1987 |
| From: | Blosser J UNION ELECTRIC CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 87-14, ULNRC-1680, NUDOCS 8711190177 | |
| Download: ML20236Q095 (3) | |
Text
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y.x Umon Etscrnic s
November 16, 1987 -
Callaway Plant U. S. Nuclear Regulatory Commission Document-Control Desk j
Washington, DC 20555 ULNRC-1680 Gentlemen:
DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT 1 FACILITY OPERATING LICENSE NPF-30~
SPECIAL REPORT 87-14 INOPERABLE SEISMIC MONITORING INSTRUMENTATION The enclosed Special Report is submitted pursuant to Technical Specification 3.3.3.3 and 6.9.2 concerning the inoperable Free Field (active) Seismie monitoring instrumentation.
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/J. D. Blosser Manager, Callaway Plant TPS/ PSP:jl1 Enclosure cc: Distribution attached l
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Mading Aadress P.O. Box 620, Fulton, MO 65251 lll 4
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.cc distribution for.ULNRC-1680
.Mr. A.-Bert Davis Mr. Thomas Alexion -(2 copies)
Regional Administrator-
,0ffice'of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission U. S. Nuclear Regulatory Commission 3
Region' III ':-..
7920 Norfolk. Avenue
- 7991 Roosevelt Road Mail Stop P-316 Glen Ellyn, IL 60137 Bethesda, MD' 20014 American Nuclear Insurers-Mr. O."Maynard c/o Dottie Sherman, Library Wolf Creek Nuclear Operating Corp.
The Exchange Suite 245 P. 0.. Box 411
.270 Farmington Avenue Burlington, KS-66839 Farmington, CTE 06032.
Mr. Merlin Williams Manager, Electric' Department..
Supt. of. Regulatory Quality &
Missouri Public Service Cammission Administrative Services
.0ffice of Inspection & Enforcement
' Wolf Creek Nuclear Operating Corp.
P. O. Box 360 P. O. Box 411.
Jefferson City,- MO 65102-Burlington, KS '66839-Records Center Institute of Nuclear Power Operations Suite 1500
- 1100 Circle 75 Parkway Atlanta, GA' 30339 NRC Resident Inspector D. F. Schnell (400)
R. J. Schukai (470)
G. L. Randolph J. F. McLaughlin.
J. E. Davis (Z40SR)
(Z40SR) (w/c)
W. R. Campbell R. P. Wendling (470)
.F. D. Field-(480)
A.- P. Neuhalfen >
A'. C. Passwater/D. E. Shafer/D. J. Walker.(470)
G. A. Hughes Z170.05 (QA Record)
M. S. Evans W. R.- Robinson M. E.' Taylor-A..M. Coria-
~H. Wuertenbaecher, Jr. (100)
S. L. Auston (470)(NSRB)
S.:J..Bellers/J. D. Schnack JDL Chrono 3456-0021.6 3456-0260 Z40ULNRC A160.761 N. Date (Sandra Auston) (470)
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L SPECIAL REPORT 87-14 INOPERABLE SEISMIC MONITORING INSTRUMENTATION This report is being generated in accordance with Technical Specification (T/S) 3.3.3.3 Action (a) which states "with one or more of the above seismic monitoring instruments 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 restoring the instrument (s) to OPERABLE status."
At 0137 on 10/10/87, the Free Field Seismic Sensor was made inoperable as the result of a lightning strike. The strike induced a voltage surge in the power cable to the sensor resulting in sensor electrical damage. At the time of the event the plant was in Mode 6, Refueling, 0% reactor power.
On 10/10/87, a work request was initiated to troubleshoot, rework, replace and/or calibrate the Free Field Seismic Sensor. Troubleshooting failed to identify the. exact damage sustained by the sensor and as a result it was removed from the system and sent to the vendor, Terra Technology Corporation, for repair. The spare sensor in stock was being repaired by the sensor vendor. Therefore no replacement sensor was available at the time of.
the event.-
Following receipt of the repaired sensor from the vendor, the Seismic Monitoring Instrumentation System will be restored to operable status.
Expected date of system restoration is 11/30/87.
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