Headquarters Daily Report OCTOBER 01, 1998 *************************************************************************** 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 - HEADQUARTERS OCTOBER 1, 1998 MR Number: H-98-0144 NRR DAILY REPORT ITEM GENERIC COMMUNICATIONS Subject: AL 98-06 ISSUING 10/02 NRC ADMINISTRATIVE LETTER 98-06: ELECTRONIC AVAILABILITY OF 10 CFR PART 21 AND 10 CFR 50.55(e) NOTIFICATIONS, dated October 2, 1998 The U.S. Nuclear Regulatory Commission is issuing this administrative letter to inform addressees of the electronic availability of notifications under Title 10 of the Code of Federal Regulations, Part 21 (10 CFR Part 21), "Reporting of Defects and Noncompliance," and 10 CFR 50.55(e) notifications, for nuclear power plants under construction. Contact: Vern Hodge, NRR 301-415-1861 E-mail: cvh@nrc.gov _ REGION II MORNING REPORT PAGE 2 OCTOBER 1, 1998 Licensee/Facility: Notification: Carolina Power & Light Co. MR Number: 2-98-0046 Robinson 2 Date: 10/01/98 Hartsville,South Carolina Dockets: 50-261 PWR/W-3-LP Subject: MANAGEMENT CHANGES AT H. B. ROBINSON UNIT 2 Discussion: Carolina Power & Light (CP&L) announced on September 30, 1998, that Tom Walt will be the new Plant General Manager at the H.B. Robinson plant effective October 19, 1998. Mr. Walt will report to John Moyer, Director-Site Operations Robinson. Mr. Walt was the Manager-Operations and Environmental Support Department in Raleigh, N.C. Regional Action: For information only. Contact: George T. MacDonald (404)562-4543 _ REGION III MORNING REPORT PAGE 3 OCTOBER 1, 1998 Licensee/Facility: Notification: Commonwealth Edison Co. MR Number: 3-98-0069 Quad Cities 1 Date: 10/01/98 Cordova,Illinois E- Mail Dockets: 50-254 BWR/GE-3 Subject: SCRAM OF UNIT 1 DUE TO LOW REACTOR WATER LEVEL Discussion: Unit 1 scrammed at 2:07a.m. CDT on September 30, 1998, due to low reactor water level. Equipment operators were in the process of removing the "A" reactor feed pump from service; "B" and "C" reactor feed pumps were providing feedwater. While performing the out-of-service tagout, the equipment operators valved out the "A" reactor feedwater flow transmitter. During this process, the transmitter generated a full flow indication signal for the "A" feedwater pump which was provided to the feedwater control system, causing an indicated feedwater flow much higher than steam flow. With the reactor feed system in three- element control, the feedwater control system began to rapidly reduce actual flow by shutting the feedwater regulating valves. A computer alarm alerted control room operators to the decrease in feedwater flow, but the reactor scrammed automatically on low reactor water level before operators were able to take action. The reactor feed system was taken to single element control and feedwater regulating valves opened in response. Reactor water level decreased as low as -20 inches (108 inches above top of active fuel, normal level is 30 inches) before rebounding. A reactor feedwater pump trip occurred on high reactor water level (about +48 inches). Reactor water level increased above 60 inches before returning to normal. Operators responded to the event appropriately. Most plant systems responded properly to the reactor scram, including primary containment isolations. Minor equipment abnormalities were observed including those related to the reactor water level scram setpoint and feedwater level control system response. The licensee planned to maintain the unit in hot standby, pending results of the root cause investigation into this event. Preliminary results of the root cause investigation show a lack of operator understanding of the feedwater flow transmitter input to the reactor level control system while in three-element control with the pump off. Additionally, electrical drawings were not referenced during the preparation and review of the out-of-service. Final results of the root cause investigation and unit restart are expected today. Regional Action: The resident inspectors observed post-scram response and root cause investigations at the site, and will monitor restart of the unit. Contact: M.Ring (630)829-9703 _