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On 3/27/03 at 1510 EST, Unit 2 was in mode … On 3/27/03 at 1510 EST, Unit 2 was in mode 4 with the reactor shutdown for a refueling outage. Valve 2P41-F063, Unit 2 Plant Service Water Outlet from the Unit 2 Reactor Building, was found closed when its indicator showed it to be open. With valve 2P41-F063 closed PSW flow through the reactor building ECCS room coolers was isolated. The loss of the ECCS room coolers required the ECCS systems to be considered inoperable. On 3/25/03 at 0004 EST the plant entered Type B1 secondary containment. At that time, Condition D1 of TS 3.5.2 should have been entered, but because the plant operators believed that they had two OPERABLE low pressure ECCS injection/spray subsystems the Condition was not entered as required. Type B1 Secondary Containment does not include the Unit 2 Reactor Building and the required actions associated with Condition D were not met. On 3/26/03 at 1049 EST operators completed alignment of Secondary Containment to Type A. This Secondary Containment Type does include the Unit 2 Reactor Building and at this time TS 3.5.2 Required Actions D1, D2, and D3 were met.</br></br>Plant Service Water butterfly valve 2P41-F063 was found with the spline clamp loose, allowing the actuator and indicator to turn without actually turning the butterfly valve shaft. Once the spline clamp was tightened, the actuator again was able to turn the valve shaft. The valve was placed in the correct position at 1545 on 3/27/03 restoring the required ECCS subsystems to OPERABLE status.quired ECCS subsystems to OPERABLE status. +
March 25, 2003 +
On 3/27/03 at 1510 EST, Unit 2 was in mode … On 3/27/03 at 1510 EST, Unit 2 was in mode 4 with the reactor shutdown for a refueling outage. Valve 2P41-F063, Unit 2 Plant Service Water Outlet from the Unit 2 Reactor Building, was found closed when its indicator showed it to be open. With valve 2P41-F063 closed PSW flow through the reactor building ECCS room coolers was isolated. The loss of the ECCS room coolers required the ECCS systems to be considered inoperable. On 3/25/03 at 0004 EST the plant entered Type B1 secondary containment. At that time, Condition D1 of TS 3.5.2 should have been entered, but because the plant operators believed that they had two OPERABLE low pressure ECCS injection/spray subsystems the Condition was not entered as required. Type B1 Secondary Containment does not include the Unit 2 Reactor Building and the required actions associated with Condition D were not met. On 3/26/03 at 1049 EST operators completed alignment of Secondary Containment to Type A. This Secondary Containment Type does include the Unit 2 Reactor Building and at this time TS 3.5.2 Required Actions D1, D2, and D3 were met.</br></br>Plant Service Water butterfly valve 2P41-F063 was found with the spline clamp loose, allowing the actuator and indicator to turn without actually turning the butterfly valve shaft. Once the spline clamp was tightened, the actuator again was able to turn the valve shaft. The valve was placed in the correct position at 1545 on 3/27/03 restoring the required ECCS subsystems to OPERABLE status.quired ECCS subsystems to OPERABLE status. +
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1 +
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05:01:45, 1 December 2017 +
May 24, 2003 +
2P41-F063 +, 2P41-F353 +, 2P41-F312A +, 2P41-F315A +, 2P41-F316A-D +, 2P41-F354 +, 2P41-F351 +, 2P41-F421 +, 2P41-F429 +, 2P41-F431B +, 2P41-F432B + and 1P41-F063 +
March 25, 2003 +
Plant Service Water Valve Found Closed Requiring Emergency Core Cooling Systems to be Declared Inoperable +
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