Morning Report for January 18, 2002
Headquarters Daily report JANUARY 18, 2002 *************************************************************************** REPORT NEGATIVE NO INPUT ATTACHED INPUT RECEIVED RECEIVED HEADQUARTERS X REGION I X REGION II X REGION III X REGION IV X *************************************************************************** PRIORITY ATTENTION REQUIRED MORNING REPORT - HEADQUARTERS JANUARY 18, 2002 MR Number: H-02-0010 NRR DAILY REPORT ITEM GENERIC COMMUNICATIONS Subject: Issuance of Regulatory Issue Summary 2002-01 NRC Regulatory Issue Summary 2002-01: Changes to NRC Participation in the International Nuclear Event Scale dated January 14, 2002 The U.S. Nuclear Regulatory Commission is issuing this regulatory issue summary to inform addressees of impending changes in the NRC's level of participation in the International Nuclear Event Scale. ADAMS Accession No.: ML013200502 Contact: Robert J. Stransky, Jr., IRO 301-415-6411 E-mail: rjs3@nrc.gov PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION JANUARY 18, 2002 Licensee/Facility: Notification: Commonwealth Edison Co. MR Number: H-02-0011 Quad Cities 1 Date: 01/18/02 Cordova,Illinois Dockets: 50-254 BWR/GE-3 Subject: Jet Pump Hold-Down Beam Failure Reportable Event Number: 38620 Discussion: On January 9, 2002, Quad Cities, Unit 1, experienced indication of a jet pump failure. This was based on the following plant indications: a) Gross Megawatt Electric Decrease b) Reactor Pressure Decrease c) Total Core Flow Indication Increase d) Core Plate DP Decrease Approximately 30 minutes after the jet pump failure the 1B recirculation pump tripped. During the resulting forced outage, the licensee inspected the Quad Cities Unit 1 jet pumps for possible damage. The licensee identified that one of the hold-down beams on jet pump 19/20 had broken into two pieces, with the associated inlet mixer on jet pump #20 wedged against the swing-gate restrainer bracket assembly after lifting 10-12 inches, separating at the slip joint. The mixer assembly was hanging approximately 20-degrees from the vertical. The hold-down beam break occurred in the transition area between the bolt hole and the end tab, in an area that had not previously been considered susceptible to stress corrosion cracking. The previous failures have been in areas of known stress concentration. The transition area was typically not inspected during hold-down beam inspections. The licensee believes the failure mechanism is intergranular stress corrosion cracking (IGSCC) related. The hold-down beams were last inspected in November 2000 with no indications noted. Jet pumps # 5, 6, 7, and 8 have a new-style hold-down beams and the 15 remaining hold-down beams have the original hold-down beams installed. During the current outage the 15 original hold-down beams were cleaned and inspected with visual (EVT-1) and ultrasonic (UT) methods. Six of the beams had crack-like indications identified during the inspections. The licensee intends to replace all the original hold-down beams with the revised design hold-down beams prior to restart. Hold-down beam failures have occurred in the past (Grand Gulf, Dresden 3) and resulted in issuance of NRC Information Notice 93-101, "Jet Pump Hold-Down Beam Failure", dated December 17, 1993, and IE Bulletin 80-07, "Jet Pump Assembly Failure", dated April 4, 1980. General Electric issued GE SIL 330 (June 9, 1980) and RICSIL 065 (December 3, 1993), which addressed the hold-down beam failures at the bolt hole and at the beam end tab. The RICSIL recommended replacement of the susceptible original hold-down beams after eight (8) years of operation. The BWR Owners Group, Vessel Internals Project, has confirmed that the original hold-down beams are currently installed only at Dresden and Quad Cities stations. The NRC special inspection is continuing at the station for further assessment. Contacts: John Jacobson: (630) 829-9736 Gene Carpenter: (301) 415-2169 Keith Poertner: (301) 415-1175 PRIORITY ATTENTION REQUIRED MORNING REPORT - HEADQUARTERS JANUARY 18, 2002 MR Number: H-02-0012 NRR DAILY REPORT ITEM GENERIC COMMUNICATIONS Subject: Issuance of Information Notice 2002-05 NRC Information Notice 2002-05: Foreign Material in Standby Liquid Control Storage Tanks dated January 17, 2002 The U.S. Nuclear Regulatory Commission (NRC) is issuing this information notice to inform addressees of equipment and design issues identified recently at the River Bend Nuclear Power Plant concerning debris found in the standby liquid control system storage tank. The aspect of this event considered of particular interest is the evident potential for systems initially filled with a combination of dry chemicals and water to have the wrapper material for the chemicals left in the system and to remain there undetected for an extended period. ADAMS Accession No.: ML013530020 Contacts: Stephen Max Schneider, Region IV 225-635-3193 E-mail: sms2@nrc.gov Ron Kopriva, Region IV 817-860-8104 E-mail: rak1@nrc.gov
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Page Last Reviewed/Updated Wednesday, March 24, 2021