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Event Notification Report for March 26, 2004

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
03/25/2004 - 03/26/2004

** EVENT NUMBERS **


40603 40610

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General Information or Other Event Number: 40603
Rep Org: COLORADO DEPT OF HEALTH
Licensee: COLORADO STATE UNIVERSITY
Region: 4
City: FORT COLLINS State: CO
County:
License #: COLO 002-027
Agreement: Y
Docket:
NRC Notified By: TIM BONZER (FAX)
HQ OPS Officer: CHAUNCEY GOULD
Notification Date: 03/22/2004
Notification Time: 13:22 [ET]
Event Date: 11/26/2003
Event Time: [MST]
Last Update Date: 03/22/2004
Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
Person (Organization):
DAVID GRAVES (R4)
TOM ESSIG (NMSS)

Event Text

THE COLORADO STATE UNIVERSITY RADIATION CONTROL OFFICE (RCO) DISCOVERED A MALFUNCTION OF THE ALARM SYSTEMS IN THE MOLECULAR AND RADIOLOGICAL BIOSCIENCE BLD. ON THE UNIVERSITY'S MAIN CAMPUS.

"On 26 November 2003, the fire alarm computer system for the University crashed. This system also carried the MRB Irradiator alarms. The Radiation Control Office was informed of this malfunction on 28 November 2003, whereby RCO Staff checked the irradiators for users and found no one scheduled for operations of either machine. The system was restored to campus the following week and it was assumed that the alarm system was back on-line. All pre-use checks of the irradiators found no problems with the daily operation of either irradiator after the incident. However, the annual inspection whereby the alarm system is checked with CSUPD revealed the problem last week.

The malfunction of the alarm system was reported to the Radiation Safety Officer on 3 February 2004 after an annual inspection found the local alarms and interlocks working to the irradiator (automatic source retraction, audible and visual alarms), but not reporting an intrusion to the University Police Department. The alarms in question satisfy the requirements of CDPHE Regulation 19.8.2.

The Radiation Safety Officer requested to the Principal User that all work with each irradiator be stopped until the alarms could be repaired. The Principal User complied, with the request on 3 February 2004.

Reporting this incident to the CDPHE is pursuant to Regulation 19.29.15 for "inoperability of an access control system."

The system is being worked on by University Facilities Management and is planned to be operational by 6 February 2004. The system will be tested fully before operations are permitted to resume."

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General Information or Other Event Number: 40610
Rep Org: FAIRBANKS MORSE ENGINE
Licensee: FAIRBANKS MORSE ENGINE
Region: 3
City: BELOIT State: WI
County:
License #:
Agreement: Y
Docket:
NRC Notified By: TODD COLLINS (FAX)
HQ OPS Officer: STEVE SANDIN
Notification Date: 03/25/2004
Notification Time: 17:56 [ET]
Event Date: 03/25/2004
Event Time: [CST]
Last Update Date: 03/25/2004
Emergency Class: NON EMERGENCY
10 CFR Section:
21.21 - UNSPECIFIED PARAGRAPH
Person (Organization):
JOHN MADERA (R3)
RONALD BELLAMY (R1)
DAVID GRAVES (R4)
VERN HODGE (NRR)
JACK FOSTER (NRR)

Event Text

PART 21 NOTIFICATION INVOLVING POTENTIAL SAFETY HAZARD FOR BLOWERS ON OP ENGINES

"Subject:Roots Blower on OP Engines

"On March 23, 2004, Fairbanks Morse Engine evaluation determined a potential safety hazard exists for blowers (P/N 16609294) on OP engines. It is possible that the aluminum rotors can slip on the steel shaft and cause rotor-to-rotor or rotor-to-housing contact which could cause blower failure and inability of engine to perform its safety function.

"The defect was caused by improper cleaning of the shaft prior to casting the rotor onto the shaft. This causes an inadequate bond and allows the aluminum rotor to move axially on the steel shaft. Sample testing of rotors has found this condition to exist to varying degrees on approximately 75% of rotors produced between 1998 and 2003.

"(4) blowers were shipped to nuclear utilities that may be affected:

"Utility Site Blower S/N
"Exelon Limerick (RB813A, RB3871, RB816)
"Entergy ANO-2 (RB814)

"To date, no engine failures have been experienced as a result of this problem. However, the potential exists. All slipped rotors have been found during routine maintenance inspections. This condition has been found to manifest itself within a low number of hours of operation. Therefore, the longer the rotors run and maintain proper clearance, the less likely they are to be affected by this condition.

"The affected utilities will be notified to evaluate inspection results and replace as necessary."

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Friday, March 30, 2012