Home
> NRC Library
> Document Collections
> Reports Associated with Events
>
Morning Reports >
2000
> October 4
Morning Report for October 4, 2000
Headquarters Daily Report OCTOBER 04, 2000 *************************************************************************** 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 - REGION I OCTOBER 4, 2000 Licensee/Facility: Notification: Niagara Mohawk Power Corp. MR Number: 1-00-0016 Nine Mile Point 1 Date: 10/04/00 Lycoming,New York SRI Dockets: 50-220 BWR/GE-2 Subject: REACTOR SCRAM AND DECLARATION OF UNUSUAL EVENT Discussion: On October 2, at 6:25 a.m., Nine Mile Point Unit 1 (NMP1) was manually scrammed in response to a stuck open reactor relief valve during reactor startup and heatup. At the time of the scram, the reactor was operating at less than one percent power, 35 psig and 273 F. All control rods fully inserted and all safety systems functioned as expected. Subsequent to the manual shutdown, a vacuum breaker in the tailpipe of the stuck open relief valve failed, allowing steam to vent directly to the drywell airspace. Condensation of the steam in the drywell and collection of the leakage in the floor drain system exceeded 10 gallons per minute (GPM), resulting in the operators declaring an Unusual Event at 7:12 a.m. The Unusual Event was terminated at 9:05 a.m., following reactor cool down to below 212 F and cessation of steam flow from the relief valve. The licensee has initiated an event investigation team to evaluate the relief valve and vacuum breaker problems. Initial inspections revealed a sticking pilot valve on the relief valve and a broken disc stop and disc stem on the vacuum breaker. The root cause for these failures will be determined. The resident inspectors have been monitoring licensee activities. A region based inspector will conduct a special inspection to evaluate the licensee's investigation team results and corrective actions. Regional Action: The licensee has contacted local media representatives and has issued two press releases. This information is current as of October 3, 2000. Contact: Robert Summers (610)337-5282 Gordon Hunegs (315)342-4041 _ REGION I MORNING REPORT PAGE 2 OCTOBER 4, 2000 Licensee/Facility: Notification: New Hampshire Yankee MR Number: 1-00-0017 Seabrook 1 Date: 10/04/00 Manchester,New Hampshire SRI Dockets: 50-443 PWR/W-4-LP Subject: SEABROOK STATION ORGANIZATIONAL CHANGES Discussion: Seabrook Station announced today that Gene St. Pierre will become the Station Director upon the retirement of Bill DiProfio on December 1, 2000. Gene St. Pierre has been employed at Seabrook Station since 1979 and is currently the Operations Manager. Brett Plummer, who was previously the Operations Manager at Maine Yankee, will replace Gene as the Operations Manager. Regional Action: None. Contact: James Linville (610)337-5129 Raymond Lorson (603)474-3580 _
Page Last Reviewed/Updated Thursday, March 29, 2012
Home
About Us
Popular Documents
Stay Connected
