Headquarters Daily Report
APRIL 21, 1999
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REPORT NEGATIVE NO INPUT
ATTACHED INPUT RECEIVED RECEIVED
HEADQUARTERS X
REGION I X
REGION II X
REGION III X
REGION IV X
PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION I APRIL 21, 1999
Licensee/Facility: Notification:
Northeast Utilities MR Number: 1-99-0015
Millstone 2 Date: 04/21/99
Waterford,Connecticut Resident Inspector
Dockets: 50-336
PWR/CE
Subject: COMPLETION OF SHUTDOWN COOLING SUCTION ISOLATION VALVE REPAIR
Discussion:
On April 20, 1999, the licensee completed installation of a welded seal
ring on valve 2-SI-652, the shutdown cooling system suction isolation
valve, to stop leakage through the pressure seal gasket. The valve is not
isolable from the reactor coolant system (RC) because it is located in
the 12-inch diameter shutdown cooling suction line just downstream from
its intersection with the RCS hot leg piping. While the plant was in
operational Mode 5, Cold Shutdown, with shutdown cooling in service, the
licensee repaired the valve in a controlled manner that maintained the
integrity of the valve's pressure boundary and maintained shutdown
cooling flow through the valve. The resident inspectors have been closely
following the licensee's repair activities. In addition to the resident
inspectors, NRC Personnel in Region I and at Headquarters reviewed the
licensee's repair plans and associated safety evaluation prior to
initiation of the repair work. The licensee currently plans to have Unit
2 ready for Mode 2 startup by April 27 at the earliest.
Contact: Steve R. Jones (860)444-5394
James Linville (610)337-5129
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