Headquarters Daily Report MARCH 21, 1996 *************************************************************************** REPORT NEGATIVE NO INPUT ATTACHED INPUT RECEIVED RECEIVED HEADQUARTERS û REGION I û REGION II û REGION III û REGION IV û PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION IV MARCH 21, 1996 Licensee/Facility: Notification: Entergy Operations, Inc. MR Number: 4-96-0028 Arkansas Nuclear 2 Date: 03/21/96 Russelville,Arkansas Resident Inspector Dockets: 50-368 PWR/CE Subject: UNEXPECTED DROP IN SPENT FUEL POOL LEVEL Discussion: At approximately 1:05 p.m. on March 20, 1996, Unit 2 operators received a low spent fuel pool level (SFP) alarm in the control room. Earlier, operators had aligned the SFP purification system from the refueling water tank to the SFP to support replacement of an SFP purification system filter. Operators dispatched to investigate found that the SFP filter drain valve was not fully closed by two turns, although the valve position indicator indicated closed. In addition, operators noticed abnormal levels in the radwaste boron management system tank. Upon fully closing the valve the draining ceased. A siphon breaker is installed in the line such that the SFP would not drain below 13 inches above the Technical Specification limit. Approximately 900 gallons drained from the SFP to the radwaste boron management system tank, resulting in a drop in the SFP level of 1 1/2 inches. SFP level remained above Technical Specification limits. The licensee is reviewing this event. Regional Action: The resident inspectors will follow up on this issue. Contact: S. J. Campbell (501)968-3290 R. L. Nease (817)860-8154 _