Alert

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 April 13, 2017

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
04/12/2017 - 04/13/2017

** EVENT NUMBERS **

52552

52634

52674

!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor	Event Number: 52552
Facility: SUSQUEHANNA Region: 1 State: PA Unit: [1] [2] [ ] RX Type: [1] GE-4,[2] GE-4 NRC Notified By: LONNIE CRAWFORD HQ OPS Officer: BETHANY CECERE	Notification Date: 02/15/2017 Notification Time: 18:10 [ET] Event Date: 02/15/2017 Event Time: 13:37 [EST] Last Update Date: 04/12/2017
Emergency Class: NON EMERGENCY 10 CFR Section: 50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL	Person (Organization): RAY MCKINLEY (R1DO)

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	94	Power Operation	94	Power Operation

Event Text

LOSS OF SECONDARY CONTAINMENT DIFFERENTIAL PRESSURE

"On February 15, 2017 at 1337 [EST], Secondary Containment Zone 1 (Unit 1 Reactor Building) differential pressure lowered to 0 inches WG [Water Gauge] due to a trip of the running Unit 1 B Filtered Exhaust Fan. Required differential pressure per SR [Surveillance Requirement] 3.6.4.1.1 could not be maintained. Zone 1 differential pressure recovered to greater than 0.25 inches WG less than one minute later after start of the standby Zone 1 Filtered Exhaust Fan. Zone 2 (Unit 2 Reactor Building) and Zone 3 (Common Areas of Unit 1&2 Reactor Buildings) ventilation remained in service and stable.

"This event is being reported under 10 CFR 50.72(b)(3)(v)(C) and per the guidance of NUREG-1022, Rev 3 section 3.2.7 as a loss of a Safety Function. There is no redundant Susquehanna Secondary Containment System."

Post-maintenance testing was underway when the fan tripped. While the investigation is on-going to determine the cause, the licensee does not believe the maintenance or testing caused the fan to trip

The licensee has notified the NRC Resident Inspector.

* * * RETRACTION FROM RONALD FRY TO DONALD NORWOOD AT 0833 EDT ON 4/12/2017 * * *

"The Unit 1 B Filtered Exhaust Fan trip that resulted in loss of secondary containment differential pressure occurred during post maintenance testing (PMT). The PMT was being performed following replacement of a flow controller associated with the Unit 1 B Filtered Exhaust Fan. In support of the PMT, Technical Specification (TS) 3.6.4.1 Condition A had been entered and was in effect at the time of the fan trip. The maintenance and the associated PMT were performed in accordance with approved work instructions/procedure. Subsequent to the initial report, Susquehanna troubleshooting determined that the fan trip was the result of an internal leak in the newly installed controller that prevented the new controller from functioning properly. The condition was therefore determined to have been the result of the completed maintenance.

"NUREG-1022, Section 3.2.7, includes the following guidance:
'...reports are not required when systems are declared inoperable as part of a planned evolution for maintenance or surveillance testing when done in accordance with an approved procedure and the plant's TS (unless a condition is discovered that would have resulted in the system being declared inoperable).'

"Following completion of the troubleshooting, Susquehanna determined that, per NUREG-1022, Section 3.2.7, the event was not reportable. Secondary Containment was declared inoperable as a part of a planned evolution for maintenance which was done in accordance with an approved procedure and the Susquehanna TS. The discovered condition was not a pre-existing condition that would have resulted in the system being declared inoperable prior to the planned maintenance activity."

The licensee notified the NRC Resident Inspector.

Notified R1DO (Jackson).

Agreement State	Event Number: 52634
Rep Org: TEXAS DEPT OF STATE HEALTH SERVICES Licensee: BRASKEM AMERICA INC Region: 4 City: FREEPORT State: TX County: License #: 06443 Agreement: Y Docket: NRC Notified By: IRENE CASARES HQ OPS Officer: JEFF HERRERA	Notification Date: 03/23/2017 Notification Time: 17:30 [ET] Event Date: 03/22/2017 Event Time: [CDT] Last Update Date: 04/12/2017
Emergency Class: NON EMERGENCY 10 CFR Section: AGREEMENT STATE	Person (Organization): JAMES DRAKE (R4DO) NMSS_EVENTS_NOTIFIC (EMAI)

Event Text

AGREEMENT STATE REPORT - FOUR STUCK SHUTTERS IDENTIFIED DURING A SIX MONTH INSPECTION

The following report was received from the Texas Department of State Health Services via email:

"On March 23, 2017, [at 1545 CDT] a consulting company called the Agency [Texas Department of State Health Services] to report that on March 22, 2017, during [a] six month inspection of devices, four devices were found with stuck shutters. Two Ohmart Vega devices contained cesium-137, models SHLG with source serial numbers SM-6918 (120 milliCuries) and 5811GK (5000 milliCuries). The other two were [the] same manufacturer, same isotope, but model SHF2 with source serial numbers M-0076 and M-0077 at 200 milliCuries each. The consulting service is in contact with the licensee's radiation safety officer who is submitting a request to amend the license maintaining the devices in the open position until repaired. No exposures are anticipated and the repairs should be performed within the next 90 days. Updates will be provided as received."

Texas Incident #: I 9473

* * * UPDATE ON 4/12/17 AT 1416 EDT FROM ART TUCKER TO DONG PARK * * *

The following information was provided by the State of Texas via email:

"On April 12, 2017, the Agency [Texas Department of State Health Services] was notified by the licensee that part of its corrective actions in response to this event was to inspect all the gauge shutters again to insure proper operation. The inspection was done on April 11, 2017. During this inspection, two additional gauge shutters were found stuck in the open position.

"Both gauges are Ohmart model SH-F2 gauges one with a 30 millicurie cesium-137 source, and the second one contains a 100 millicurie [cesium-137] source. No member of the general public or employees at the facility will receive any additional exposure from this event. Additional information will be provided as it is received in accordance with SA-300."

Notified R4DO (Kramer) and NMSS Events Notification via email.

Power Reactor	Event Number: 52674
Facility: OYSTER CREEK Region: 1 State: NJ Unit: [1] [ ] [ ] RX Type: [1] GE-2 NRC Notified By: THOMAS J. BUSK HQ OPS Officer: DONG HWA PARK	Notification Date: 04/12/2017 Notification Time: 21:06 [ET] Event Date: 04/12/2017 Event Time: 15:30 [EDT] Last Update Date: 04/12/2017
Emergency Class: NON EMERGENCY 10 CFR Section: 50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE	Person (Organization): DON JACKSON (R1DO)

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

Event Text

LOSS OF THE TECHNICAL SUPPORT CENTER VENTILATION SYSTEM

"Oyster Creek Generating Station has experienced a loss of the Technical Support Center (TSC) ventilation system due to charcoal filter test failure. A charcoal filter replacement is planned.

"If an emergency is declared requiring TSC activation during the time TSC ventilation is non-functional, the TSC will be staffed and activated using existing emergency planning procedure unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures.

"This notification is being made in accordance with 10 CFR 50.72(b)(3)(xiii) due to a loss of the TSC. An update will be provided once the TSC ventilation has been restored to normal operation.

"The NRC Resident Inspector will be notified."

Page Last Reviewed/Updated Thursday, March 25, 2021