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Event Notification Report for August 5, 2015

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
08/04/2015 - 08/05/2015

** EVENT NUMBERS **


51273 51285

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Agreement State Event Number: 51273
Rep Org: NC DIV OF RADIATION PROTECTION
Licensee: DOMTAR PAPER COMPANY, LLC
Region: 1
City: PLYMOUTH State: NC
County:
License #: NC RAM #094-0
Agreement: Y
Docket:
NRC Notified By: DAVID CROWLEY
HQ OPS Officer: JOHN SHOEMAKER
Notification Date: 07/28/2015
Notification Time: 16:59 [ET]
Event Date: 07/22/2015
Event Time: [EDT]
Last Update Date: 07/28/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
Person (Organization):
RAY MCKINLEY (R1DO)
NMSS_EVENTS_NOTIFIC (EMAI)

Event Text

AGREEMENT STATE REPORT - FIXED GAUGE WITH SHUTTER STUCK CLOSED

The following report was received from the State of North Carolina (NC) via email:

The licensee was performing routine maintenance and leak testing checks on a Berthold fixed nuclear density gauge when they discovered its shutter was stuck in the closed position. This maintenance record was dated for 7/22/2015 and listed that the device needed cleaning, showed signs of mild to moderate corrosion, the shutter failed to open, and replacement was necessary. The closed shutter was verified by a survey meter and its detector response. The [North Carolina] State was notified the following week, on 7/27/2015. The gauge manufacturer, Berthold, had already been contracted to dispose of the source and device. No exposures or radiation safety concerns have resulted from this failed shutter at this time and none are expected.

The Berthold Fixed Nuclear Gauge is serial #6625, model# LB7440 with a Berthold source serial #1329, model #D7547, 20 mCi Cs-137 source (as of 5/98). The last leak test performed March 28, 2013, that passed according to Thermofisher (3 year leak test requirement). Berthold will perform another leak test before transporting off site.

The cause of the stuck shutter is dirt and corrosion products that appear to be the leading cause of the shutter failing in the closed position. NC will follow up with the licensee to determine if dirt accumulation and corrosion occurred by operating in environmental conditions outside of the manufacturer's intentions.

NC State report: NC NMED #150022.

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Part 21 Event Number: 51285
Rep Org: UNITED CONTROLS INTERNATIONAL
Licensee: FERRAZ SHAWMUT/MERSEN
Region: 1
City: NORCROSS State: GA
County:
License #:
Agreement: Y
Docket:
NRC Notified By: KORINA LOOFT
HQ OPS Officer: STEVE SANDIN
Notification Date: 08/04/2015
Notification Time: 10:29 [ET]
Event Date: 06/05/2015
Event Time: [EDT]
Last Update Date: 08/04/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
21.21(d)(3)(i) - DEFECTS AND NONCOMPLIANCE
Person (Organization):
ART BURRITT (R1DO)
GEORGE HOPPER (R2DO)
ROBERT DALEY (R3DO)
RAY AZUA (R4DO)
PART 21/50.55 REACT (EMAI)

Event Text

PART 21 REPORT - FERRAZ SHAWMUT/MERSEN FUSES P/N: AJT25 AND AJT60

The following information was excerpted from the email provided by the reporting organization:

"On April 2015, United Controls International (UCI) performed dedication testing on time delay fuses AJT25 and AJT60 for First Energy - Perry Nuclear Power Plant under purchase orders 45469886 and 45469450, respectively. The subject fuses were being tested per United Controls Standard dedication testing which excludes seismic and environmental testing requirements. Both fuses, AJT25 and AJT60 opened during their current clearing tests at times that are within their respective clearing time tolerance ranges but their Smartspot labels did not change color, as required, to indicate the fuses cleared.

"For fuse AJT25, eight fuses have been tested, including one (1) fuse from the first lot which comprises 30 fuses (with manufacture date 09/15 [9th week of 2015]) and seven (7) fuses from the second lot which comprises 32 fuses (with manufacture date 10/15). Five (5) fuses were tested for current clearing at 135% of the fuse rated current, two (2) fuses were tested for current clearing at 200% of the fuse rated current and one (1) fuse was tested for current clearing at 500% of the fuse rated current.

"For fuse AJT60 with manufacture date 06/15, only one (1) fuse was tested from the received lot of fuses which comprises 24 fuses for current clearing time at 135% of the fuse rated current. Further testing of the AJT60 fuses was not performed since a trend was already observed in regard to the fuses AJT25 failure.

"UCI has returned all received fuses in the three (3) received lots. Mersen [Ferraz/Shawmut/Mersen] has then performed evaluation on the 30 AJT25 fuses with manufacture date of 9/15 (9th week of 2015), confirmed that the seven (7) fuses that UCI has tested were open and conducted testing on six (6) among the remaining 23 fuses. Testing by Mersen revealed that only two out of the six fuses had their Smartspot indicator that went off to indicate that the fuses cleared. Upon further examination by Mersen; it is believed that over tightening of the crimping jars during installation and crimping of the ferrule endcaps is the cause of the Smartspot indicator's malfunction.

"The fuses are Ferraz Shawmut/Mersen part numbers AJT25 and AJT60. UCI recommends the purchaser to include a requirement for suppliers to provide fuse with manufacture date after 6/30/15 where the manufacturer has performed corrective action to prevent this issue from recurring."

Point of Contact: Divya Paidy, Engineering Manager, dpaidy@unitedcontrols.com, (770) 496-1406, ext. 106,

Page Last Reviewed/Updated Wednesday, August 05, 2015
Wednesday, August 05, 2015