ML20043B105
| ML20043B105 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 05/15/1990 |
| From: | Denton R BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9005240193 | |
| Download: ML20043B105 (3) | |
Text
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i BALTIMORE -
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's OAS AND a
'ELECTRI
- CHARLES CENTER
- P.O. BOX 1475 *- BALTIMORE, MARYLAND 21203 1475'
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R. E. DENToN -
MANAMR.
May 15,1990 CJ,LVERT CLFFS hUCLEAR -
POWER PLANT DEPARTMENT i
U. S. Nuclear Regulatory Commission f
Washington, DC 20555 -
A'ITENTION:
Document Control Desk SUBJECI':
Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2; Docket Nos. 50 317 & 50-318 Meteorolocical Monitorine Instrumentation Snecial Report Sunplement
REFERENCES:
(a)
Letter from R. E. Denton (BG&E) to Document Control Desk (NRC),
dated
. April 12,
- 1990,
' Meteorological Monitoring Instrumentation Special Report Technical Specification 3.33.4.a y
Gentlemen:
Per Reference (a), we are providing a supplement to our Special Report concerning inoperable.
meteorological monitoring instrumentation channels.
Should you have any further questions regarding this matter, we will be pleased to discuss them with you.
Very truly yours, k'n n
L RED /DWM/bjd Attachment cc:
D. A. Brune, Esquire
. J. E. Silberg, Esquire R. A. Capra, NRC D. G. Mcdonald, Jr., NRC
. T. T. Martin, NRC L E. Nicholson, NRC R. McLean, DNR l
gg,N 900suo192 900313 gna anocxocoog7 u
i
-0 iDocument Control Desk
" May 15j l990 -
- Page 2 bec:
' G. V. McGowan --
C H. Poindexter J. A. Tiernan/C. J. Franklin, Jr.
M.J. Micrnicki e-:
R. F. Ash /E. I. Bauereis/M. C. Gavrilas W. R. Corcoran C H. Cruse /P. E. Katz -
- R. C DeYoung Ui R. M. Douglass.
R. P. Heibelff. N. Pritchett C C Lawrence,III F. J. Munno 1-R. B. Pond, Jr./S. R. Buxbaum L B. Russell /J. R. Lemons G. L Adams.
A. B. Anuje -
J. E. Baum G. L Bell /f. E. Noard J. J. Connolly R. E. Denton G. L Detter
- G. J. Falibota L D. Graber -
' L S. Larragoite
]
B. S. Montgomery
' P. A. Pieringer M. L Stone J. H. Walter G. S. Pavis M. J. Warren L Williams l
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m, KITACilMENT (1)
~ METEOROLOGICAL MONITORING INSTRUMENTATION SPECIAL REPORT SUPPLEMENT HACKGROUND On the evening of March 30,1990, it was determined that the Meteorological Information Data Acquisition System (MIDAS), which provides meteorological information to the Control Room, was out of service. Neither the Computer Maintenance Unit nor the vendor were successful in restoring the channel to operable status between April 1,1990 and April 11, 1990. On April 12,1990 the t
system was returned to its original configuration, repowered, and reloaded. The system became functional at that time and was observed for six days to verify that the equipment was performing as expected before the equipment was declared operable.
CAUSE OF MALFUNCTION No cause of the malfunction has been identified.
~
PLANS FOR RESTORING TIIE CilANNEL TO OPERAHLE STATUS The channel was declared operable on April 18,1990.
ADDITIONAL INFORMATION Action is being taken to evaluate upgrading MIDAS with a PC based system, replacing the present Sperry V-77 and teletype units, i
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