CALVERT CLIFFS - TECHNICAL SPECIFICATION REQUIRED SHUTDOWN DUE TO SMALL RCS PRESSURE BOUNDARY INSTRUMENT LINE LEAK

At 1715 EDT on July 17th, 2012, Calvert Cliffs Nuclear Power Plant Unit 1 identified RCS Pressure Boundary Leakage from the instrument line to 1-PDT-123A, 11A reactor coolant pump differential pressure transmitter. Technical Specification 3.4.13, Action B was entered and requires that the Unit be placed in Mode 3 within 6 hours and Mode 5 within 36 hours. The licensee has initiated plant shutdown in accordance with this Technical Specification.
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