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Event Notification Report for May 29, 2015

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
05/28/2015 - 05/29/2015

** EVENT NUMBERS **


51094 51095

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Power Reactor Event Number: 51094
Facility: COLUMBIA GENERATING STATION
Region: 4 State: WA
Unit: [2] [ ] [ ]
RX Type: [2] GE-5
NRC Notified By: QUOC VO
HQ OPS Officer: JEFF ROTTON
Notification Date: 05/28/2015
Notification Time: 03:35 [ET]
Event Date: 05/27/2015
Event Time: 22:17 [PDT]
Last Update Date: 05/28/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
WAYNE WALKER (R4DO)

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

Event Text

AREA RADIATION MONITORS NON-FUNCTIONAL DURING PLANNED BUS OUTAGE

"A planned outage of the Division 2 medium voltage switchgear (SM-8) was initiated at 22:17 PDT on 5/27/15. The bus outage results in all area radiation monitors required for emergency classification being non-functional. Compensatory measure monitoring equipment has been established prior to the loss to provide alternate means of monitoring area radiation levels. The SM-8 outage window is scheduled to last 124 hours. Although the monitoring function is maintained by the compensatory monitoring equipment, the planned loss of area radiation monitors for greater than 72 hours is being reported as a major loss of emergency assessment capability in accordance with 10 CFR 50. 72(b )(3)(xiii).

"The NRC Resident Inspector has been notified."

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Power Reactor Event Number: 51095
Facility: BRUNSWICK
Region: 2 State: NC
Unit: [1] [2] [ ]
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: MARK TURKAL
HQ OPS Officer: JOHN SHOEMAKER
Notification Date: 05/28/2015
Notification Time: 13:18 [ET]
Event Date: 05/26/2015
Event Time: 15:36 [EDT]
Last Update Date: 05/28/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
21.21(d)(3)(i) - DEFECTS AND NONCOMPLIANCE
Person (Organization):
KATHLEEN O'DONOHUE (R2DO)
PART 21/50.55 REACT (EMAI)

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 100 Power Operation 100 Power Operation

Event Text

PART 21 NOTIFICATION - ALLEN BRADLEY 700RTC RELAY CONFIGURATION

"This is a non-emergency notification, required by 10 CFR 21.21(d)(3)(i).

"Brunswick has determined that Allen Bradley relays, base model 700RTC, contain an unevaluated Complex Programmable Logic Device (CPLD). This was an unpublished design change that was implemented to replace an obsolete integrated circuit chip. The undocumented design change did not result in a part number change from Allen Bradley. There was no change to the external appearance of the relay that would indicate that a design change had been made to the relay configuration. Therefore, qualification/dedication of the modified relays have not included additional testing for the new CPLD component. Testing, performed by Duke Energy, has demonstrated that this CPLD can be affected by electrical noise from operation of nearby relays which can reset the timing of the relay. This condition was discovered as a result of a post-maintenance test of an emergency diesel generator. Additional details associated with the discovery of this condition are contained in Brunswick Licensee Event Report 1-2015-002, dated May 20, 2015.

"Brunswick purchased, as commercial grade, 25 of the modified Allen Bradley 700RTC relays beginning in October, 2008. Duke Energy dedicated these relays for use in safety related applications at Brunswick. The dedicated relays were not provided to any third party customers.

"The NRC Senior Resident Inspector has been notified."

Brunswick has taken applicable compensatory measures to insure no equipment is inoperable because of these relays.

This problem was previously reported by AZZ/NLI Nuclear Logistics, Inc. in EN #51030.

Page Last Reviewed/Updated Friday, May 29, 2015
Friday, May 29, 2015