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BOTH UNITS AT CALVERT CLIFFS REMOVED FROM SERVICE TO RESOLVE ELECTRICAL SYSTEM CONCERNS

 BOTH UNITS AT CALVERT CLIFFS REMOVED FROM SERVICE
 TO RESOLVE ELECTRICAL SYSTEM CONCERNS
 BALTIMORE, March 19 /PRNewswire/ -- An Unusual Event was declared at 5:25 a.m. today at Calvert Cliffs Nuclear Power Plant when operators declared all three of the plant's emergency diesel generators to be inoperable.
 A shutdown of both units began immediately and is scheduled to be completed at approximately 1:15 p.m. today, at which point the Unusual Event will be terminated. An Unusual Event is the lowest of four emergency classification levels used by the commercial nuclear industry.
 The diesel generators had to be declared inoperable because of a possibility that in certain, very unlikely accident conditions, the plant's emergency electrical supply system could not provide enough electricity to meet the needs of the plant's safety systems.
 The concern was identified during a Nuclear Regulatory Commission inspection of the plant's electrical distribution system. Engineering evaluations show that there is approximately a 1-in-10 million chance of the necessary conditions occurring.
 Unit One will move into a refueling outage that was scheduled to begin tomorrow night (March 20, 1992). The outage is scheduled for completion in late June.
 Unit Two will remain out of service until concerns about its emergency electrical supply system are resolved. Engineering evaluations and work planning are underway.
 Located on the shores of the Chesapeake Bay in Lusby, Md., Calvert Cliffs consists of two 825-megawatt units. It provides approximately 40 percent of the electricity used in Baltimore Gas and Electric Company's (NYSE: BGE) Central Maryland service territory.
 -0- 3/19/92
 /CONTACT: Arthur J. Slusark of Baltimore Gas and Electric, 410-234-7433/
 (BGE) CO: Calvert Cliffs Nuclear Power Plant; Nuclear Regulatory Commission ST: Maryland IN: UTI SU:


MP -- PH021 -- 9674 03/19/92 12:10 EST
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Publication:PR Newswire
Date:Mar 19, 1992
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