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On March 28, 2001, a discrepancy was disco … On March 28, 2001, a discrepancy was discovered between the Piping & Instrumentation Diagram (P&ID) and the as-built piping associated with the B reactor vessel fuel zone water level channel.</br></br>The discrepancy was discovered while working on a design change to connect the two reactor vessel fuel zone instrument channels to upgraded reference columns. It was found that two instrument lines between instrument racks on elevations 935 feet and 962 feet in the Reactor Building had been crossed in a vertical pipe run during original plant construction. As a result, some instrumentation connected to containment penetration X-29A via excess flow check valve XFV-26 was actually connected to excess flow check valve XFV-57 and vice versa. This error presented no operability concerns for the affected instrumentation. However,.a review of the procedure used to periodically test these valves revealed that the piping error prevented a valid test of XFV-57 from being performed. The B leg piping was rerouted to conform to the P&ID. XFV-57 was tested and was found to be operable. Technical Specification 4.7.D.1.b requires excess flow check valves to be tested every operating cycle. The fact that XFV-57 had not been properly tested since original plant startup constitutes a violation of this Technical Specification.nstitutes a violation of this Technical Specification. +
On March 28, 2001, a discrepancy was disco … On March 28, 2001, a discrepancy was discovered between the Piping & Instrumentation Diagram (P&ID) and the as-built piping associated with the B reactor vessel fuel zone water level channel.</br></br>The discrepancy was discovered while working on a design change to connect the two reactor vessel fuel zone instrument channels to upgraded reference columns. It was found that two instrument lines between instrument racks on elevations 935 feet and 962 feet in the Reactor Building had been crossed in a vertical pipe run during original plant construction. As a result, some instrumentation connected to containment penetration X-29A via excess flow check valve XFV-26 was actually connected to excess flow check valve XFV-57 and vice versa. This error presented no operability concerns for the affected instrumentation. However,.a review of the procedure used to periodically test these valves revealed that the piping error prevented a valid test of XFV-57 from being performed. The B leg piping was rerouted to conform to the P&ID. XFV-57 was tested and was found to be operable. Technical Specification 4.7.D.1.b requires excess flow check valves to be tested every operating cycle. The fact that XFV-57 had not been properly tested since original plant startup constitutes a violation of this Technical Specification.nstitutes a violation of this Technical Specification. +
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