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Event Notification Report for June 26, 2006

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
06/23/2006 - 06/26/2006

** EVENT NUMBERS **


42640 42661 42662

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Power Reactor Event Number: 42640
Facility: DIABLO CANYON
Region: 4 State: CA
Unit: [1] [2] [ ]
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: KEN JOHNSTON
HQ OPS Officer: BILL GOTT
Notification Date: 06/14/2006
Notification Time: 17:30 [ET]
Event Date: 06/14/2006
Event Time: 09:41 [PDT]
Last Update Date: 06/23/2006
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
RUSSELL BYWATER (R4)

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

ERDS INOPERABLE

"On June 14, 2006, at 0941 PDT, plant operators declared both Units 1 and 2 Emergency Response Data System (ERDS) inoperable due to the failure to complete scheduled surveillance testing. The in-plant emergency response facility data system (ERFDS) and safety parameter display system (SPDS) are operating as expected, but data transfer could not be accomplished via the digital data transfer to the NRC Event Response Center.

"Plant personnel are actively investigating the cause of the data transfer failure, and will update this notice upon completion of troubleshooting, repair, and successful performance of the surveillance test.

"Plant management, emergency personnel, and the NRC Resident Inspector(s) will be informed of the condition, planned maintenance actions, and resolution of this condition."

* * * UPDATE FROM DAVE BAHNER TO W. GOTT AT 1841 EDT ON 06/16/06

"PG&E restored the ERDS data system to service and satisfactorily completed communication testing with the NRC Incident Response Center." The system was declared operable at 1433 PT.

The licensee will notify the NRC Resident Inspector. Notified R4DO (A. Gody)

* * * UPDATE FROM MATTHEW COWARD TO HUFFMAN AT 1306 EDT ON 6/23/06 * * *

"The following update is provided to clarify the reason for reporting the failure of the Emergency Response Data System (ERDS) on June 14, 2006. On June 14, 2006, at 0941 PDT, plant operators declared both Units 1 and 2 ERDS inoperable when it was discovered during surveillance testing that, although the in-plant emergency response facility data system (ERFDS) and safety parameter display system (SPDS) were operating as expected, the data transfer to the NRC Event Response Center could not be accomplished."

This update is to clarify that the ERDS inoperability was discovered during surveillance testing and was not due to a failure to complete scheduled surveillance testing as initially reported. The licensee notified the NRC Resident Inspector. R4DO (Graves) notified.

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Power Reactor Event Number: 42661
Facility: PILGRIM
Region: 1 State: MA
Unit: [1] [ ] [ ]
RX Type: [1] GE-3
NRC Notified By: MICHAEL MCDONNELL
HQ OPS Officer: JEFF ROTTON
Notification Date: 06/23/2006
Notification Time: 12:50 [ET]
Event Date: 05/26/2006
Event Time: 15:25 [EDT]
Last Update Date: 06/23/2006
Emergency Class: NON EMERGENCY
10 CFR Section:
20.2201(a)(1)(ii) - LOST/STOLEN LNM>10X
Person (Organization):
MARVIN SYKES (R1)
PETER WILSON (IRD)
IAN JUNG (NRR)
ILTAB (via email) ()
This material event contains a "Less than Cat 3" level of radioactive material.

Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 100 Power Operation 100 Power Operation

This material event contains a "Less than Cat 3" level of radioactive material.

Event Text

POTENTIAL LOSS OF LICENSED NUCLEAR MATERIAL

"In Event Notifications 42597and 42599 on May 22, and 23, 2006, respectively, as updated on May 26, 2006 Pilgrim Nuclear Power Station notified the NRC that during ongoing activities to remove non-fuel material from the Pilgrim Spent Fuel Pool it had been identified that nine (9) irradiated neutron detectors containing very small quantities (less than 0.003 grams each) of special nuclear material were not in their expected locations. Per the inventory sheets, the neutron detectors were expected to be enclosed in "dry tubes" in the Spent Fuel Pool. Processing of the "dry tubes" identified that the neutron detectors are not in their expected locations.

"Subsequent investigation has determined that an error in the records was introduced in 1996 when the current base inventory sheets were developed. During the 1996 inventory, the assumption was made that these nine (9) "dry tubes" contained neutron detectors. The investigation has determined that the detectors, although moved to the spent fuel pool, were removed from the "dry tubes" prior to the "dry tubes" removal from the reactor vessel in 1987.

"This affected the validity of the 1996 base inventory. A written report will be submitted consistent with 10 CFR 20.2201(b)."

The licensee notified the NRC Resident Inspector.

THIS MATERIAL EVENT CONTAINS A "LESS THAN CAT 3" LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks.

This source is not amongst those sources or devices identified by the IAEA Code of Conduct for the Safety & Security of Radioactive Sources to be of concern from a radiological standpoint. Therefore is it being categorized as a less than Category 3 source

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Other Nuclear Material Event Number: 42662
Rep Org: US AIR FORCE
Licensee: US AIR FORCE
Region: 1
City: BOLLING AFB State: DC
County:
License #: 42-23539-01AF
Agreement: N
Docket:
NRC Notified By: MAJOR CLINT ABELL
HQ OPS Officer: BILL HUFFMAN
Notification Date: 06/23/2006
Notification Time: 14:15 [ET]
Event Date: 06/23/2006
Event Time: 14:10 [EDT]
Last Update Date: 06/23/2006
Emergency Class: NON EMERGENCY
10 CFR Section:
20.2201(a)(1)(i) - LOST/STOLEN LNM>1000X
Person (Organization):
DAVID GRAVES (R4)
GREG MORELL (NMSS)
ILTAB (VIA E-MAIL) ()

This material event contains a "Less than Cat 3" level of radioactive material.

Event Text

LOSS OF TWO AMERICIUM-241 DETECTOR SOURCES

A representative for the Air Force Master Material License reported that two Americium-241 sources (SSDR NR-1129-D0102-S; Model M43A1) each with a curie content of less than 300 microCuries (less than 600 microCuries total) were determined to be missing from a storage location at the Tyndall Air Force Base in Florida. The sources are used in Chemical Agent Detectors. The date of last confirmed inventory of the sources was December of 2005. The RSO at Tyndall AFB recently changed and a new inventory was conducted at which time the sources were determined to be unaccounted for. The licensee states that there is information that indicates the sources have been transferred to another AFB but that this has not yet been confirmed. Investigation into the current location of the sources is still in progress.


THIS MATERIAL EVENT CONTAINS A "LESS THAN CAT 3" LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks.

This source is not amongst those sources or devices identified by the IAEA Code of Conduct for the Safety & Security of Radioactive Sources to be of concern from a radiological standpoint. Therefore is it being categorized as a less than Category 3 source

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