Morning Report for April 17, 2003
Headquarters Daily Report
APRIL 17, 2003
ATTACHED INPUT RECEIVED
REGION I X
REGION II X
REGION III X
REGION IV X
PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION III APRIL 17, 2003
MR Number: 3-03-0011
Lacrosse 1 Date: 04/15/03
Lacrosse,Wisconsin by telephone
Subject: UNUSUAL EVENT DECLARED AT LA CROSSE FOLLOWING REQUEST FOR
At approximately 11:58 a.m. (CDT) on April 15, 2003, the licensee staff
received a carbon dioxide (CO2) system discharge alarm for the 1B
Emergency Diesel Generator (EDG) Building at the decommissioned LaCrosse
Nuclear Power Plant. Because discharge of the CO2 system into the
building would create an oxygen deficient environment, the licensee
management requested offsite assistance from the local fire department to
permit entry into the building and assess the conditions that may have
caused the system discharge alarm. The local fire department was equipped
and trained to enter an oxygen deficient environment while the licensee
staff did not possess this capability.
Concurrent with its request for offsite assistance, the licensee declared
a Notice of Unusual Event (NUE) emergency classification at 12:15 p.m.
(CDT) and initiated notifications to Local and State officials and the
NRC. Following the initial notification, Region III staff monitored the
licensee staff's response to and recovery from the alarm condition.
The local fire department arrived at the site and assisted the licensee
staff in its evaluation of the alarm. The fire department and licensee
staff determined that a fire had not occurred in the 1B Emergency Diesel
Generator Building. Instead, the CO2 system appeared to have discharged
in response to elevated temperatures caused by a malfunctioning space
heater. The licensee staff did not identify any other unusual conditions
Based upon the fire department's and licensee staff's investigation of
conditions in the 1B Emergency Diesel Generator Building, the licensee
staff terminated the Notice of Unusual Event classification at 12:52 p.m.
The reactor has been shut down since 1987.
Contact: MIKE JOHNSEN (608)689-4210
KENNETH G. O'BRIEN (630)829-9821
Page Last Reviewed/Updated Friday, January 31, 2020