The following violation of very low safety significance (Green) was identified by the licensee and is a violation of NRC requirements which met the criteria of the
NRC Enforcement Policy for being disposition as a
NCV.
TS 3.3.2, Function 6.f, requires that all four instrumentation channels of the TDCA pump suction transfer function be
operable in Modes 1, 2, and 3.
TS 3.3.2, Condition N, specifies if one or more of the pressure switch instrumentation channels are
inoperable, the channel must be restored to operability within
48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or the associated TDCA pump must be declared
inoperable. Contrary to this requirement, from September 1993 to May 30, 2013, the channel associated with pressure switch 1CAPS5390 was
inoperable and the licensee failed to declare the Unit 1 TDCA
inoperable within the required TS completion time. This violation was determined to be of very low safety significance (Green) because the channel would still have been capable of actuating and aligning the TDCA to its assured water source within the timeframe necessary for the pump to perform its intended safety function. This violation was documented in the licensees
CAP as
PIP M-13-05935.
