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Event Notification Report for July 16, 2014

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
07/15/2014 - 07/16/2014

** EVENT NUMBERS **


50281 50282

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Power Reactor Event Number: 50281
Facility: MILLSTONE
Region: 1 State: CT
Unit: [ ] [2] [ ]
RX Type: [1] GE-3,[2] CE,[3] W-4-LP
NRC Notified By: GERALD BAKER
HQ OPS Officer: CHARLES TEAL
Notification Date: 07/15/2014
Notification Time: 13:20 [ET]
Event Date: 07/15/2014
Event Time: 09:40 [EDT]
Last Update Date: 07/15/2014
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
CHRISTOPHER CAHILL (R1DO)

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

Event Text

STACK HIGH RANGE RADIATION MONITOR OUT OF SERVICE FOR PLANNED MAINTENANCE

The Unit 2 stack high range radiation monitor (RM 8169) was removed from service at 0940 EDT for planned maintenance. The monitor was returned to service at 1119 EDT after the completion of maintenance.

The licensee notified the NRC Resident Inspector, the Connecticut Department of Energy and Environmental Protection, and the city of Waterford for this event.

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Power Reactor Event Number: 50282
Facility: BRAIDWOOD
Region: 3 State: IL
Unit: [ ] [2] [ ]
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: JOE CONQUEST
HQ OPS Officer: MARK ABRAMOVITZ
Notification Date: 07/15/2014
Notification Time: 17:57 [ET]
Event Date: 07/15/2014
Event Time: 09:42 [CDT]
Last Update Date: 07/15/2014
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(ii)(B) - UNANALYZED CONDITION
Person (Organization):
PATTY PELKE (R3DO)

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

Event Text

UNANALYZED CONDITION - LOW CONTAINMENT SPRAY FLOW RATE

"At 0942 [CDT] on 7/15/2014, the 2A Containment Spray chemical additive flow was found out of tolerance low during surveillance testing. This resulted in an unanalyzed condition in that insufficient chemical additive flow might have resulted in lower than assumed containment spray pH values during past periods.

"Based on the above, this is being reported in accordance with 10CFR50.72(b)(3)(ii)(B). Actions are in progress to restore the 2A Containment Spray chemical additive flow to within tolerance. The 2B Containment Spray system is operable per Technical Specification 3.6.6 and is capable of providing required chemical additive flow.

"The required flow is 18 to 67 gallons per minute (gpm), however, the measured flow was 17.96 gpm.

"The licensee has notified the NRC Resident Inspector."

Page Last Reviewed/Updated Thursday, July 17, 2014
Thursday, July 17, 2014