WOLF CREEK - THREE AUXILIARY FEEDWATER (AFW) TRAINS DECLARED INOPERABLE

"At 1422 CDT, while operating in MODE 1 at approximately 100% rated thermal power (RTP), Wolf Creek Generating Station (WCGS) entered Technical Specification 3.7.5, 'Auxiliary Feedwater (AFW) System,' Condition D for three AFW trains inoperable. The AFW pumps are equipped with recirculation lines to prevent pump operation against a closed system. The recirculation line for each pump combines into a common header that flows to the condensate storage tank (CST). The common recirculation line transitions from safety-related to non-safety related at the AFW to CST pipe tunnel. During a review of the system design information, it was identified that a seismic event or tornado could result in damage to this portion of the recirculation line and thereby restrict or block the recirculation flow causing pump damage.

"TS 3.7.5, Required Action D.1, requires the immediate initiation of action to restore one AFW train to OPERABLE status. The Note to Required Action D.1 specifies that LCO 3.0.3 and all other LCO Required Actions requiring MODE changes are suspended until one AFW train is restored to OPERABLE status. The plant remains in MODE 1 at approximately 100% RTP with activities that could lead to the need to maneuver the plant being suspended.

"WCGS personnel are developing an evaluation to support the OPERABILITY of the AFW trains with the reliance on compensatory measures as an interim action until final corrective action to resolve the condition are completed.