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Due to a lapse in appropriations, the NRC has ceased normal operations. However, excepted and exempted activities necessary to maintain critical health and safety functions—as well as essential progress on designated critical activities, including those specified in Executive Order 14300—will continue, consistent with the OMB-Approved NRC Lapse Plan.

Event Notification Report for May 27, 2010

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
05/26/2010 - 05/27/2010

** EVENT NUMBERS **


45942 45949 45957

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General Information or Other Event Number: 45942
Rep Org: TEXAS DEPARTMENT OF HEALTH
Licensee: DIAMOND SHAMROCK REFINING COMPANY
Region: 4
City: THREE RIVERS State: TX
County:
License #: 03699
Agreement: Y
Docket:
NRC Notified By: ART TUCKER
HQ OPS Officer: JOE O'HARA 		Notification Date: 05/21/2010
Notification Time: 12:50 [ET]
Event Date: 05/21/2010
Event Time: [CDT]
Last Update Date: 05/21/2010
Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
 Person (Organization):
GREG PICK (R4DO)
ANGELA MCINTOSH (FSME)

Event Text

AGREEMENT STATE REPORT - STUCK OPEN SHUTTER ON RONAN GAUGE

The following report was received from the State of Texas via e-mail:

"On May 21, 2010, the Agency [State of Texas] was notified by the licensee that while conducting a routine inspection of a Ronan Engineering model SA1-F37 nuclear gauge, the shutter failed to close. The gauge was installed in 1991 and contained a 20 millicurie Cesium (Cs) - 137 Source. The licensee conducted a radiation survey in the area of the gauge and found the dose rates to be normal. Open is the normal operating condition for the gauge therefore there is no additional exposure risk to their workers. The vessel the gauge is associated with has been posted to warn workers hat the shutter is not functioning properly. The licensee has contacted the manufacturer to schedule the repair. The licensee stated that the repair should be completed within the next 60 days."

Texas Incident Number I-8746

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General Information or Other Event Number: 45949
Rep Org: NORTH DAKOTA DEPARTMENT OF HEALTH
Licensee: WHEATHERFORD INTERNATIONAL LIMITED
Region: 4
City: WILLISTON State: ND
County: WILLIAM
License #: 33-46901-01
Agreement: Y
Docket:
NRC Notified By: DAN HARMAN
HQ OPS Officer: VINCE KLCO 		Notification Date: 05/24/2010
Notification Time: 12:05 [ET]
Event Date: 05/21/2010
Event Time: 13:00 [MDT]
Last Update Date: 05/24/2010
Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
 Person (Organization):
MICHAEL SHANNON (R4DO)
ANGELA MCINTOSH (FSME)
CHUCK CAIN (R4)

Event Text

AGREEMENT STATE REPORT- CALIBRATION SOURCE NOT RETURNED TO ITS STORAGE HOLDER

The following information was received by e-mail:

"About 0930 Weatherford International, LTD. (ND Lic # 33-45901-01) reported that at about 1500, May 21, 2010, in Williston, Williams County, ND, a well logging tool was [returned to] the truck with the calibration source still in the tool. The calibration source is Cs-137, strength about 55.5 GBq. This error was discovered about 1500, May 21, 2010. The source, when in the tool is highly collimated, restricting significant potential dose to a limited volume. The dosimeter badges for those working in the vicinity of the truck and those in an adjacent office have been sent in to Landauer for analysis. Drawings and estimated doses will be forwarded to NRC as soon as received from Weatherford.

"ND Incident #: ND10003"

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Power Reactor Event Number: 45957
Facility: VERMONT YANKEE
Region: 1 State: VT
Unit: [1] [ ] [ ]
RX Type: [1] GE-4
NRC Notified By: ANDREW WISNIEWSKI
HQ OPS Officer: VINCE KLCO 		Notification Date: 05/26/2010
Notification Time: 17:25 [ET]
Event Date: 05/26/2010
Event Time: 15:26 [EDT]
Last Update Date: 05/26/2010
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
 Person (Organization):
JAMES DWYER (R1DO)

Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode
1 A Y 72 Power Operation 0 Hot Shutdown

Event Text

AUTOMATIC REACTOR SCRAM WHILE INCREASING POWER

"At 1526 on 5/26/2010, while operators were increasing power with reactor recirculation flow, an RPS (Reactor Protection System) actuation occurred in both channels and all control rods inserted. RPV (Reactor Pressure Vessel) level decreased to 114.5 inches (Low level setpoint is less than 127 inches). Following the scram, the PCIS (Primary Containment Isolation System) groups 2, 3, 4 and 5 received actuation signals and all open valves isolated. Both trains of standby gas treatment system actuated.

"Plant actions taken included entering procedures OT-3100, Reactor Scram on RPS Actuation and EOP-1, RPV Control on Low Level Signal. The EOP-1 was exited per shift manager direction because of no emergency. The operators stabilized the plant and reset both RPS and PCIS. An investigation into the cause of the scram is continuing."

Electrical power is being supplied from offsite sources through the startup transformers.

The licensee notified the NRC Resident Inspector.

Page Last Reviewed/Updated Thursday, March 25, 2021

Page Last Reviewed/Updated Thursday, March 25, 2021