Skip to main content

Event Notification Report for July 08, 1999

U.S. Nuclear Regulatory Commission
Operations Center

EVENT REPORTS FOR
07/07/1999 - 07/08/1999

EVENT NUMBERS
3590735904359023591035996

Other Nuclear Material
Event Number: 35907
Rep Org: U.S. AIR FORCE
Licensee: U.S. AIR FORCE
Region: 4
City: CANNON AFB   State: NM
County: CURRY
License #: 42-23539-01AF
Agreement: Y
Docket: 03028641
NRC Notified By: KRISTIN SWENSON
HQ OPS Officer: BOB STRANSKY
Notification Date: 07/09/1999
Notification Time: 10:40 [ET]
Event Date: 07/08/1999
Event Time: 00:00 [MDT]
Last Update Date: 07/09/1999
Emergency Class: NON EMERGENCY
10 CFR Section:
20.2201(a)(1)(ii) - LOST/STOLEN LNM>10X
Person (Organization):
CHARLES MARSCHALL (R4)
DON COOL (NMSS)
Event Text
MISSING TRITIUM EXIT SIGN

While performing an inventory on 7/8/99, personnel at the Cannon AFB in New Mexico discovered that one exit sign, containing 20 Ci of tritium (in 1997), was missing. The sign was installed in a dormitory building.

HOO NOTE: Refer to event #35996 for a description of a similar occurrence.


Power Reactor
Event Number: 35904
Facility: SAN ONOFRE
Region: 4     State: CA
Unit: [] [2] [3]
RX Type: [1] W-3-LP,[2] CE,[3] CE
NRC Notified By: MATT THURBERN
HQ OPS Officer: BOB STRANSKY
Notification Date: 07/09/1999
Notification Time: 02:10 [ET]
Event Date: 07/08/1999
Event Time: 20:35 [PDT]
Last Update Date: 07/09/1999
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(ii) - ESF ACTUATION
Person (Organization):
CHARLES MARSCHALL (R4)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
2 N Y 100 Power Operation 100 Power Operation
3 N Y 100 Power Operation 100 Power Operation
Event Text
TRAIN 'A' TOXIC GAS ISOLATION SIGNAL ACTUATION

A train 'A' toxic gas isolation signal (TGIS) occurred, causing the control room ventilation system to isolate and the train 'A' emergency chill water system to start. The TGIS was caused when the ammonia channel went into alarm. The licensee is investigating the cause of the ammonia alarm, but reported that maintenance workers were venting freon at the time of the actuation. The NRC resident inspector has been informed of this event by the licensee.


Power Reactor
Event Number: 35902
Facility: BYRON
Region: 3     State: IL
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: L. RUPPERT
HQ OPS Officer: WILLIAM POERTNER
Notification Date: 07/08/1999
Notification Time: 13:51 [ET]
Event Date: 07/08/1999
Event Time: 11:55 [CDT]
Last Update Date: 07/08/1999
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(1)(v) - ENS INOPERABLE
Person (Organization):
TONY VEGEL (R3)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 100 Power Operation 100 Power Operation
2 N Y 100 Power Operation 100 Power Operation
Event Text
LOSS OF EMERGENCY NOTIFICATION SYSTEM (ENS) AND COMMERCIAL TELEPHONE LINES.

At 11:55 CDT on 07/08/99, the main communication lines to Byron were cut at Byron Prairie View Golf Course. This resulted in the ENS, Nuclear Accident Reporting System, and normal offsite communication lines being lost. The licensee presently has 4 cellular telephones available (1 in the main control room, 1 in the plant managers office, and 2 in the TSC) and the company tie lines are available (load dispatcher).

The licensee estimate for repair is 24 hours (Refer to HOO Log for cellular telephone number).

The licensee has notified the NRC resident inspector and the State.

***UPDATE ON 07/08/99 @ 1521 BY ALLEN TO POERTNER ***

ENS and commercial telephone lines have been returned to service.

The NRC operations officer notified the R3DO (Tony Vegel).


Fuel Cycle Facility
Event Number: 35910
Facility: PORTSMOUTH GASEOUS DIFFUSION PLANT
Region: 3     State: OH
Unit: [] [] []
RX Type: URANIUM ENRICHMENT FACILITY
Comments: 2 DEMOCRACY CENTER
6903 ROCKLEDGE DRIVE
BETHESDA, MD 20817 (301)564-3200
NRC Notified By: JEFF CASTLE
HQ OPS Officer: DOUG WEAVER
Notification Date: 07/09/1999
Notification Time: 21:01 [ET]
Event Date: 07/08/1999
Event Time: 22:00 [EDT]
Last Update Date: 07/09/1999
Emergency Class: NON EMERGENCY
10 CFR Section:
Person (Organization):
THOMAS KOZAK (R3)
JOHN SURMEIER (NMSS)
CHARLES MILLER (IRO)
Event Text
24 HOUR BULLETIN 91-01 REPORT

At 2200 hours on 7/8/1999, a Nuclear Criticality Safety Analysis (NCSA) PLANT_062.A00 control was lost. Requirement #6 of the NCSA was not maintained when a cover was not placed over cell 31-4-1 stage 3 converter-flange after maintenance, leaving the system open to atmosphere and therefore losing the control for moderation. This constituted loss of one contingency in a situation protected by the double contingency principle. Control #6 of NCSA-Plant062.A00 was re-established at 0027 hours on 7/9/1999, at which time a plug was installed In the opening.

The licensee notified the NRC resident inspector.


Other Nuclear Material
Event Number: 35996
Rep Org: U.S. AIR FORCE
Licensee: U.S. AIR FORCE
Region: 4
City: CANNON AFB   State: NM
County: CURRY
License #:
Agreement: Y
Docket:
NRC Notified By: LOYD UTTERBACK (fax)
HQ OPS Officer: STEVE SANDIN
Notification Date: 08/06/1999
Notification Time: 09:36 [ET]
Event Date: 07/08/1999
Event Time: 00:00 [MDT]
Last Update Date: 08/06/1999
Emergency Class: NON EMERGENCY
10 CFR Section:
20.2201(a)(1)(ii) - LOST/STOLEN LNM>10X
Person (Organization):
TOM STETKA (R4)
SUSAN SHANKMAN (NMSS)
Event Text
MISSING TRITIUM EXIT SIGNS

In a letter dated 23 July 1999, the Commander of Cannon Air Force Base summarized that two (2) exit signs, each containing 20 Curies of tritium (in 1997), were missing. These signs were manufactured by SBS Technologies, Inc. located in Winston-Salem, NC (model #B-100 Luminexit or Betalux Self-Luminous Exit Signs). The report includes corrective actions and further details.

HOO NOTE: Refer to event #35907 which describes a similar occurrence.