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 January 12, 2016

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
01/11/2016 - 01/12/2016

** EVENT NUMBERS **

51557

!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor	Event Number: 51557
Facility: NORTH ANNA Region: 2 State: VA Unit: [1] [ ] [ ] RX Type: [1] W-3-LP,[2] W-3-LP,[3] M-4-LP NRC Notified By: MICHAEL WHALEN HQ OPS Officer: DONALD NORWOOD	Notification Date: 11/20/2015 Notification Time: 15:34 [ET] Event Date: 11/20/2015 Event Time: 08:23 [EST] Last Update Date: 01/11/2016
Emergency Class: NON EMERGENCY 10 CFR Section: 50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE	Person (Organization): MIKE ERNSTES (R2DO)

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

INOPERABLE VENT STACK RADIATION MONITOR

"At 0823 EST on 11/17/2015, the Unit 1 'A' Vent Stack radiation monitor, 1-VG-RI-179, was declared non-functional due to a faulty heat trace circuit. Compensatory measure to perform grab samples every 6 hours was implemented. At 0823 EST on 11/20/2015, the Unit 1 'A' Vent Stack radiation monitor, 1-VG-RI-179, had been out-of-service for 72 hours. The loss of 1-VG-RI-179 is being reported per 10 CFR 50.72(b)(3)(xiii) as a loss of emergency assessment capability. Corrective actions continue to be pursued to restore 1-VG-Ri-179 to functional status.

"The NRC Senior Resident Inspector has been notified by the licensee."

* * * UPDATE FROM PATRICK FRENCH TO JOHN SHOEMAKER AT 0931 EST ON 11/22/15 * * *

The Unit 1 'A' Vent Stack radiation monitor, 1-VG-RI-179, was returned to service at 1440 EST on 11/21/15.

The licensee has notified the NRC Resident Inspector.

Notified R2DO (Ernstes).

* * * RETRACTION FROM MICHAEL WHALEN TO DONALD NORWOOD AT 1509 EST ON 1/11/2016 * * *

"The purpose of this report is to retract the event notification report made in accordance with 10 CFR 50.72(b)(3)(xiii) on November 20, 2015 at 1534 EST (EN# 51557). After further review it has been determined that the performance of grab samples is an approved back-up method for radiological assessment capabilities as described in the North Anna Emergency Plan implementing procedure EPIP-4.24 Gaseous Effluent Sampling During Emergency. During non-emergencies, VPAP-2103N Offsite Dose Calculation Manual governs grab sampling and is tracked by Operations using 1-LOG-14 Non-Routine Surveillance Log. As such, a loss of radiological assessment capability did not exist and the ability to assess EAL RU1.4 was not affected. This is consistent with NUREG 1022, Rev.3, Supplement 1 and NEI 13-01, Rev. 0. The action was cleared at 1440 hours on 11/21/15 and the Unit 1 'A' Vent Stack radiation monitor, 1-VG-RI-179, was returned to functional status.

"The NRC Senior Resident lnspector has been informed of this event notification retraction."

Notified R2DO (Masters).

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