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NPS_Watch Mar 12, 2019
#1
The Daily Dose - Exposing the nuclear power industry while the nuclear power industry exposes you.

There are 6 EN(s) today, 2 associated with power stations.

[ PART21 again, 2 units. ]

NRC Event Notices for March 12, 2019 |
https://www.nrc.gov/reading-rm/doc-colle...312en.html

[  ]

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----------------- Power Reactor Event Notices
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----------- [ Current event for PA_BeaverValley_2 ]

20190311 | PA_BeaverValley_2 | PLANNED COMMUNICATION SYSTEM MAINTENANCE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53924

"On 03/11/2019 planned maintenance activities will be performed on the Beaver Valley Power Station (BVPS) Unit 2
Digital Radiation Monitoring System's (DRMS) Communications System.

"The work includes upgrades to the DRMS hardware, software and computer peripherals.
Components to be upgraded under this planned maintenance include: Redundant Servers, Operator Console,
Health Physics Office Console/Workstation, Printers and Portable Mass Storage/Backup and
Computer peripherals necessary to interface with the computer system.

This planned upgrade on the Unit 2 DRMS Communications System will result in the loss of Unit 2 radiological monitoring capability
in the Control Room and on the Plant Computer System (PCS).

Neither the Emergency Response Facilities nor the Emergency Response Data System (ERDS) will receive radiological data.

No actual radiation monitors are affected. The scheduled work duration is approximately three weeks.

"When the DRMS is out of service for the upgrade, compensatory actions will be in place.
Radiation monitors will be continuously monitored for any increases in radiation levels.
The Unit 2 Shift Manager will be notified of any increase in radiation monitor readings,
including exceeding Emergency Action Levels (EAL).

"This is an eight-hour, non-emergency notification for a Loss of Emergency Assessment Capability.
This event is reportable in accordance with 10 CFR 50.72(b)(3)(xiii) because the upgrade to the DRMS Communications System
will result in the loss of the Unit 2 radiological monitoring capability in the Control Room and to the Unit 2 Plant
Computer System that affects the functionality of an Emergency Response Facility.

"There is no impact on the health and safety of the public or plant personnel.

"The NRC Resident Inspector has been notified."

The licensee is currently in a Technical Specification Action Statement, Limiting Condition for Operation for spent fuel pool
radiation monitor and leakage rate monitor.

----------- [ 2019 event history for PA_BeaverValley ]

[ No previous ENs for this year. ]

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----------- [ Current event for

----------- [ 2019 event history for

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----------- [ Current event for

----------- [ 2019 event history for

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----------- [ Current event for
----------- [ 2019 event history for
[ No previous ENs for this year. ]
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------------[ PART 21 ] - These ENs are for issues that involve multiple site/reactor units
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20190311 | PART221 | PART 21 REPORT - IMPROPER ANTI-ROTATION KEY DIMENSION ON GLOVE VALVE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53928

"This notification is being submitted pursuant to the guidelines of 10 CFR Part 21 to report that a 24" Class 150 Globe valve
for RHRSW HX Isolation MOV, E1150F068A at Detroit Edison - Fermi 2, failed to fully open due to the failure of the anti-rotation key.

"The site notified WVC [Weir Valves and Controls] USA on January 18th of this issue involving a new bonnet that was installed which
included a key bushing/key assembly. The new bonnet used was from an originally supplied valve assembly on WVC USA order 0010001147-10
with a quantity of one, Detroit Edison Company PO 4700732583.

The key is welded on top and bottom in the key bushing keyway to hold the key in place.
After a month in service, during operation, the welds failed which caused the key to drop out or be driven out from the key bushing by friction/vibration.
Upon review of the design it was found that the key and key slot were not dimensioned properly for a tight fit allowing a larger
than recommended gap between key and keyway.

This gap allowed the operational torque loads to put the welds in bending which caused the welds to fail.
Loss of the key renders the valve inoperable to open or close.

"The site has currently restored the key bushing/key assembly with new keys with proper fit and welds to ensure the key is retained.

"[WVC USA] has performed an extent condition review and has concluded that one other operating site,
Georgia Power - SNC, Hatch Unit 1 1WVC USA order 0010000081-10 (55544A),
Southern Nuclear Operating Co PO SNG10025571 has a similar key/key bushing assembly.

There was a quantity of six valve assemblies shipped for this purchase order.
The site has been contacted to evaluate the fit of the key bushing/key assembly.

"Engineering has determined that improper design clearance was the cause of failure.
[WVC USA is] performing corrective actions to ensure future re-occurrences cannot occur in design engineering."

Affected sites include: Fermi Unit 2 and Hatch Unit 1.

For additional information, contact: [ contact details at NRC site ]


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----------------- Other reactor info from daily power tracking
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Region 1
 
MD_Calvert_Cliffs_2 @ 0 % [ RPV OPEN ( 23 / 22 ) 20190218 ]
[ missed planned restart date ]

NY_Indian_Point_3 @ 0 % [ Begin RFO ( 02 / 30 ) 20190312 ]
[ expect RPV OPEN Friday ]


PA_Limerick_2 @ 98 % [ coastdown to RFO 20190415 ]

NY_Nine_Mile_Point_1 @ 84 % [ coastdown to RFO 20190320 ]

NJ_Oyster_Creek_1 @ 0 % [ RPV CLOSED , defueled , permanent shutdown ]

NJ_Salem_1 @ 83 % [ coastdown to RFO 20190426 ]

PA_Susquehanna_1 @ 100 % up from 91 % down from 100 % Sunday; 88 % Saturday
[ no EN, unk reason from power drop. ]

PA_Susquehanna_2 @ 83 % [ coastdown to RFO 20190323 ]


Region 2

AL_Browns_Ferry_2 @ 0 % [ RPV OPEN ( 11 / 25 ) ]

NC_Brunswick_2 @ 0 % [ RPV OPEN ( 11 / 28 ) ]

GA_Hatch_2 @ 0 % [ RPV OPEN ( 37 / 20 ) ] [ 20190204 shutdown early ]
[ missed planned restart date ]

NC_McGuire_1 @ 95 % [ coastdown to RFO 20190323 ]

VA_NorthAnna_2 @ 0 % [ RPV OPEN ( 10 / 36 ) ]

FL_Turkey_Point_4 @ 0 % [ Begin RFO ( 02 / 28 ) 20190311 ]
[ expect RPV OPEN Friday ]

GA_Vogtle_2 @ 0 % [ Begin  RFO ( 02 / 20 ) 20190310 ]
[ expect RPV OPEN Friday ]


Region 3

IL_Clinton_1 @ 98 % unch from 98 % Sunday;
[ units normal operating range ]

MI_DC_Cook_1 @ 0 % [ RPV OPEN ( 07 / 90 ) 20190306  ]

IL_La_Salle_2 @ 85 % up from 75 % [ Exit RFO ( 20 / 35 ) 20190218 ]

MN_Monticello_1 @ 82 %  [ coastdown to RFO 20190413 ]

OH_Perry_1 @ 0 % [ Begin RFO ( 03 / 34 ) 20190309 ]
[ expect RPV OPEN Thursday ]

WI_Point_Beach_1 @ 99 % [ coastdown to RFO 20190322 ]

IL_Quad_Cities_1 @ 83 % [ coastdown to RFO 20190318 ]


Region 4

CA_DiabloCanyon_1 @ 0 % [ RPV OPEN ( 31 / 33 ) ]

AZ_PaloVerde_2 @ 100 % up from 99 % down from 100 % Sunday; 100 % Saturday
[ no EN, unk reason from power drop. ]

LA_RiverBend_1 @ 75 % unch from 75 % Saturday
[ coastdown to RFO 20190329, coastdown breakdown ]

LA_Waterford_3 @ 0 % [ RPV OPEN ( 67 / 39 ) ]
[ missed planned restart date ]


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[ There is/are currently 8 unit(s) with the RPV OPEN - ref the 2019 Spring Refueling Outage Schedule and Status ]

posted by Staup Knewkinus a Dane Gerous production. All human rights reserved.
 
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