ML20235T546
| ML20235T546 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 07/13/1987 |
| From: | Blosser J UNION ELECTRIC CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 87-07, 87-7, ULNRC-1548, NUDOCS 8707220172 | |
| Download: ML20235T546 (3) | |
Text
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July 13, 1987 k
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' CaHaway Plant U.-S. Nuclear'Regulatsry Commission Document Control Desk
-Washington, DC 20555 ULNRC-1548
Dear Gentlemen:
l DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT 1 FACILITY OPERATING LICENSE NPF-30 SPECIAL REPORT 87-07 INOPERABLE SEISMIC MONITORING INSTRUMENTATION The enclosed Special Report is being submitted pursuant-to-Technical Specification 3.3.3.3 and 6.9.2 concerning the inoperable Containment Base Slab Triaxial Response - Spectrum Recorder (Passive).
J. D. Blosser Manager, Callaway Plant 11')
TPS/SEMe:jl1 Enclosure ec: Distribution attached 8707220172 870713 PDR' ADOCK 05000483
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PDR V
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1 Mamng Authess' PD Box 620, Fulton MO 65251
._--_-____O
3 2
l cc distribution for ULNRC-1548 Mr. Thomas W. Alexion (2 copies)
Manager, Electric Department Office of Nuclear Reactor Regulation Missouri Public Service Commission U.S. Nuclear Regulatory Commission P. O. Box 360 Mail Stop P-316 Jefferson City, MO 65102 7920 Norfolk Avenue Bethesda, MD 20014 Mr. O. Maynard Wolf Creek Nuclear Operating Corp.
Mr. A. Bert Davis P. O. Box 411 Regional. Administrator-Burlington, KS 66839 U. S. Nuclear Regulatory Commission Region III Mr. Merlin Williams
'799 Roonevelt' Road Su9t. of Regulatory Quality &
Glen Ellyn, IL 60137 Administrative Services Wolf Creek Nuclear Operating Corp.
American Nuclear Insurers P. O. Box 411 c/o Dottie Sherman, Library' Burlington, KS 66839 The Exchange Suite 245 270 Farmington Avenue 1
Farmington, CT 06032 Records Center Institute of Nuclear Power Operations Suite 1500 1100 circle 75 Parkway Atlanta, CA 30339 NRC Resident Inspector-D. F. Schnell (400)
R. J. Schukai (470)
G. L..Randolph J. F. McLaughlin J. E. Davis (240SR)
(Z40SR) (w/c)
D. W. Capone /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)
J. M. Price W. R. Robinson M. E. Taylor j
H. Wuertenbaecher, Jr. (100)
S. L. Auston (470)(NSRB)
S. J. Bellers/J. D. Schnack JDB Chrono i
3456-0021.6 3456-0260 Z40ULNRC G56.37 N. Date (Sandra Auston) (470)
SPECIAL REPORT 87-07 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 Ccmmission pursuant to Specification 6.9.2 within the neAc 10 days outliatng the cause of the malfunction and the plans for restoring the instrument (s) to OPERABLE status."
On 6/1/87, Instrument and Controls (I&C) technicians were performing an 18-month channel calibration on the Containment Base Slab Triaxial Response ~ Spectrum Recorder (Passive) in accordence with T/S 4.3.3.3.2, Table 3.3-7, item 3.a.
During restoration frem tia procedure, the " scratch pads" for the 48 sensors (16 sensors ou each of three axes) were being re-inserted when the scriber tip for sensor #15 l
(vertical axis) was inadvertently broken. The Containment Base Slab recorder was declared inoperable at 1100 CDT on 6/1/87 thus placing the plant in T/S 3.3.3.3 Action (a). The p2 ant was in Mode 1 - Power Operation at 100% power at the time of this event.
A Work Request was initiated to replace the scriber on 6/1/87.
During replacement work on 6/12/87, further damage to sensor #15 was j
discovered. The intact portion of its scriber had separated from the base support which would have prevented the scriber tip from etching the
" scratch pad".
The cause of this damage is unknown and deemed to have l
occurred at the time of discovery with no firm evidence to believe otherwise..The other sensors were inspected at this time with no other problems found.
Sensor #15 will be replaced and is pending receipt of a new sensor j
on site. -Expected date of return to OPERABLE status is July 30, 1987.
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