At 0112 EDT on May 5, 2013, the plant commenced a shutdown due to water leakage from the SIRW (Safety Injection Refueling Water) Tank exceeding the operational decision-making issue process trigger point of 34 gallons per day, causing it [the SIRW] to be declared inoperable and requiring entry into Technical Specification
LCO 3.5.4 Condition B.
LCO 3.5.4 Condition B requires the SIRW Tank to be returned to Operable status within one hour or entry into Condition C which requires the plant to be in Mode 3 within
6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and Mode 5 within
36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.
This event had no impact on the health and / or safety of the public.
The NRC Resident has been notified.
The exact location of the leakage has not been determined at this time. The Plant will be taken to Mode 5.
The licensee has been operating with SIRW leakage at a rate of less than 34 gallons per day. The leakage has increased for unknown reasons to a calculated value of approximately 90 gallons per day.
See
EN #48018 dated 06/12/12 for similar report on a technical specification shutdown for the SIRW tank leakage.
