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 10, 2015

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
04/09/2015 - 04/10/2015

** EVENT NUMBERS **

50944

50961

50962

Agreement State	Event Number: 50944
Rep Org: CALIFORNIA RADIATION CONTROL PRGM Licensee: KRAZEN & ASSOCIATES, INC. Region: 4 City: BAKERSFIELD State: CA County: License #: 8028-15 Agreement: Y Docket: NRC Notified By: DONELLE KRAJEWSKI HQ OPS Officer: JEFF HERRERA	Notification Date: 04/01/2015 Notification Time: 13:26 [ET] Event Date: 03/30/2015 Event Time: 11:00 [PDT] Last Update Date: 04/01/2015
Emergency Class: NON EMERGENCY 10 CFR Section: AGREEMENT STATE	Person (Organization): JACK WHITTEN (R4DO) NMSS_EVENTS_NOTIFIC (EMAI)

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

Event Text

AGREEMENT STATE REPORT - LOSS OF CONTROL OF MOISTURE/DENSITY GAUGE

The following report was received from the State of California Department of Public Health via email:

"This is to report a nuclear gauge was 'lost' by the licensee, but was found by the licensee within a couple of hours at the jobsite where it was being used. The gauge was not damaged.

"At 1334 PDT on March 30, 2015, the Department [State of California Department of Public Health] was notified by the corporate RSO [Radiation Safety Officer] that a nuclear gauge (Troxler model 3440, serial number 18204, containing 8 mCi Cs-137 and 40 mCi Am-241:Be) could not be found by the licensee. The gauge user reported he had driven from a job site at the corner of Fairview Road and Walkabout Drive to the McDonalds at 1607 Panama Lane in Bakersfield which is about 1 mile away. When he returned to his truck, he noticed the tailgate was down and the gauge/transport case were missing. The gauge user drove back to the jobsite and looked to see if the gauge had fallen off of the truck when he had driven to McDonalds. He did not see it on the roadside. He returned to the jobsite and found the transport case with no gauge inside. He looked around the jobsite and did not see the gauge near where he had been working. He asked others on the jobsite if they had seen the gauge, but no one had. The gauge user drove back to the McDonalds one more time and still did not see a gauge along the roadside. The Bakersfield police and the Department were notified that they had lost a gauge.

"At 1452 PDT on the same day, the Bakersfield police emailed [the Department] stating the licensee had found the gauge. [The Department] confirmed this with the licensee. The RSO had gone to the jobsite himself and had found the gauge in a culvert on the jobsite. At this point no one knows how the gauge ended up in the culvert. The gauge is now back in the possession of the licensee and does not show any damage. The gauge user was counseled for not keeping control over the gauge and retraining will be given to all gauge users regarding control and security of the gauge when in use and when it is not in use."

California Report Number: 033015

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. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf

Power Reactor	Event Number: 50961
Facility: CALVERT CLIFFS Region: 1 State: MD Unit: [1] [2] [ ] RX Type: [1] CE,[2] CE NRC Notified By: DAN GENEVA HQ OPS Officer: VINCE KLCO	Notification Date: 04/07/2015 Notification Time: 15:45 [ET] Event Date: 04/07/2015 Event Time: 12:45 [EDT] Last Update Date: 04/09/2015
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 50.72(b)(3)(v)(B) - POT RHR INOP 50.72(b)(3)(ii)(B) - UNANALYZED CONDITION	Person (Organization): MARC FERDAS (R1DO) JEFFERY GRANT (IRD) SCOTT MORRIS (NRR)

Unit	SCRAM Code	RX CRIT	Initial PWR	Initial RX Mode	Current PWR	Current RX Mode
1	A/R	Y	100	Power Operation	0	Hot Standby
2	A/R	Y	100	Power Operation	0	Hot Standby

Event Text

DUAL UNIT AUTOMATIC REACTOR TRIPS DUE TO A VOLTAGE TRANSIENT RESULTING IN GENERATOR TRIPS

"A loss of Main Generator Load which caused a Reactor Trip on Units 1 & 2. A switchyard voltage transient from a highline occurred, which caused an undervoltage condition on both units' safety related 4KV buses.

"Unit 1 is on normal heat removal to the condenser.

"Unit 2 is on auxiliary feedwater and normal condenser bypass valves for temperature control. An Auxiliary Feedwater Actuation System (AFAS) actuation occurred on Unit 2.

"The [Unit 2] 2B emergency diesel generator did not start and load on its respective 24-4 KV bus. The 24-4KV Bus was repowered from the alternate feeder breaker. Cause of the emergency diesel failure to start is under investigation.

"All safety functions are met for both units."

All control rods fully inserted. The site is in a normal shutdown electrical configuration powered from offsite. The site plans to stay in Mode 3 pending restart.

The licensee notified the NRC Resident Inspector, State and local authorities. A press release is planned.

* * * UPDATE FROM JAY GAINES TO DANIEL MILLS AT 0129 EDT ON 4/9/2015 * * *

"During post trip review, it was determined that the 21 saltwater pump had to be manually started. With the failure of 2B emergency diesel generator, there were no saltwater pumps running for approximately 12 minutes. Additional troubleshooting determined the 2A emergency diesel generator sequencer did not automatically start 21 saltwater pump. The 2B emergency diesel generator was returned to service on 4/8/2015 at 1730 [EDT]. The loss of saltwater [pump] and emergency diesel generator is reportable as an event that could have prevented fulfillment of a safety function and is also an unanalyzed condition."

The licensee has notified the NRC Resident Inspector. Notified R1DO (Ferdas), IRD MOC (Grant), NRR EO (Morris).

Power Reactor	Event Number: 50962
Facility: HARRIS Region: 2 State: NC Unit: [1] [ ] [ ] RX Type: [1] W-3-LP NRC Notified By: CRYSTIAN IOPPOLO HQ OPS Officer: STEVE SANDIN	Notification Date: 04/07/2015 Notification Time: 16:38 [ET] Event Date: 04/07/2015 Event Time: 11:47 [EDT] Last Update Date: 04/09/2015
Emergency Class: NON EMERGENCY 10 CFR Section: 50.72(b)(3)(ii)(A) - DEGRADED CONDITION	Person (Organization): JAMIE HEISSERER (R2DO)

Unit	SCRAM Code	RX CRIT	Initial PWR	Initial RX Mode	Current PWR	Current RX Mode
1	N	N	0	Refueling	0	Refueling

Event Text

REACTOR VESSEL HEAD PENETRATION FLAW IDENTIFIED DURING INSERVICE INSPECTION

"This is a non-emergency report.

"On April 7, 2015, while the Harris Nuclear Plant was shut down for a scheduled refueling outage, the reactor vessel head penetrations were being examined in accordance with Inservice Inspection Program. Ultrasonic examinations identified a flaw in a head penetration nozzle. The unit is in a safe and stable condition. The flaw will be repaired prior to startup from the refueling outage.

"The flaw and repair have no impact to the health or safety of the public.

"The NRC Resident Inspector has been informed."

An extent of condition investigation is on-going.

* * * UPDATE AT 1644 EDT ON 4/9/15 FROM JOHN CAVES TO JEFF HERRERA * * *

"During the ongoing reactor vessel head penetration examinations, two additional flaws were identified in head penetration nozzles. The unit remains in a safe and stable condition. All of the identified flaws will be repaired prior to startup from the refueling outage. The remaining examinations are in progress to determine the extent of condition.

"The NRC Resident Inspector has been notified."

Notified R2DO (Heisserer)

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