United States Nuclear Regulatory Commission - Protecting People and the Environment

Morning Report for November 7, 2003

Headquarters Daily Report

To top of page

REGION III

DUANE ARNOLD ENERGY CENTER MANUAL SHUTDOWN DUE TO HIGH REACTOR COOLANT CONDUCTIVITY

Licensee/Facility:

NUCLEAR MANAGEMENT CO., LLC
Duane Arnold
HUDSON, Wisconsin
Dockets: 05000331
[1] GE-4
License No:
Notification:

MR Number: 3-2003-0034
Date: 11/06/2003

Tel. Call with Res. Inspctrs

Discussion:

At 1:34 a.m. (CST) on November 7, 2003, the licensee inserted a manual reactor shutdown while at 45 percent power due to high reactor coolant conductivity. All systems responded as anticipated with the exception of the turbine generator which did not trip on reverse power as expected. Control room operators manually tripped the turbine generator. The turbine generator did not motor as a result of this event.

The licensee is investigating the cause of the high conductivity.

The residents inspectors are monitoring the activities.

Region III (Lisle, IL) was informed of this shutdown by the Senior Resident Inspector at 2:35a.m. (CST) on November 7, 2003.


Regional Action: Information Only

Accession Numbers:

Accession No Accession Date
ML033110589 11/07/2003

Contacts:

Name Office Abbrev Phone No E-Mail
BURGESS, B L R3 (630) 829-9629 BLB@nrc.gov
Page Last Reviewed/Updated Thursday, March 29, 2012