Morning Report for April 14, 1999
Headquarters Daily Report APRIL 14, 1999 *************************************************************************** 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 APRIL 14, 1999 Licensee/Facility: Notification: Florida Power & Light Company MR Number: H-99-0034 St. Lucie 2 Date: 04/14/99 Subject: Relief Request for Leaking ECCS Suction Piping (Reportable Event Number 35550) Discussion: On April 6, 1999, St. Lucie, Unit 2, began a shutdown from 100 percent power when pinhole leaks were identified in both trains of the ECCS suction lines that run from the refueling water tank. The affected piping runs in a trench from the tank, which is located outdoors, to the ECCS pumps. A conference call with the licensee, Region II, and NRR was held to discuss the leaking ECCS lines. The leaks were characterized as micro-cracks and the evidence of leakage was the appearance of boric acid crystals on the surface of both the A and B train ECCS suction lines. No actual leakage was observed coming from the lines. Subsequent to the call, NRR reviewed a licensee submittal assessing the margin in the degraded piping and granted the licensee relief from making a code repair to the ECCS suction lines for a period of two weeks. The licensee terminated the plant shutdown at 28 percent power and increased power to 50 percent until a code repair could be made to the A train piping. The licensee subsequently increased power to 100 percent and plans to perform a code repair on the B train piping by April 17, 1999. Contacts: Keith Wichman, NRR Dave Skeen, NRR (301) 415-2757 (301) 415-1174 E-mail: krw@nrc.gov E-mail: dls@nrc.gov _ REGION I MORNING REPORT PAGE 2 APRIL 14, 1999 Licensee/Facility: Notification: Niagara Mohawk Power Corp. MR Number: 1-99-0014 Nine Mile Point 1 Date: 04/14/99 Lycoming,New York SRI PC Dockets: 50-220 BWR/GE-2 Subject: REFUELING OUTAGE Discussion: At 7:00 a.m. on April 11, 1999, Niagara Mohawk Power Corporation commenced power reduction of Nine Mile Point Unit 1 in preparation for the unit's 15th refueling outage. The main generator was taken off-line on April 11 at 1:10 p.m., and the unit was in cold shutdown on April 12, at 1:05 a.m. In addition to refueling activities, major activities planned include: installation of emergency core cooling system suction strainers, replacement of control rod drive mechanisms, and core shroud inspections. The outage duration is expected to be 45 days with restart scheduled for May 22, 1999. Regional Action: The resident inspectors are on site monitoring licensee activities. Contact: Gordon Hunegs (315)342-4041 Gene Barber (610)337-5232 _
Page Last Reviewed/Updated Wednesday, March 24, 2021
Page Last Reviewed/Updated Wednesday, March 24, 2021