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NPS_Watch Sep 13, 2018
#1
The Daily Dose - Exposing the nuclear power industry while the nuclear power industry exposes you.

There are 3 EN(s) today, 2 associated with power stations.

[  ]

NRC Event Notices for September 13, 2018 |
https://www.nrc.gov/reading-rm/doc-colle...913en.html

[ event times not entered ]

----------------------------------------------------------------------------------------------------------------------------------------------------
----------------- Power Reactor Event Notices
----------------------------------------------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------
----------- [ Current event for GA_Vogtle_3,4 ]

20180912 | GA_Vogtle_3,4 | CONTRACTOR SUPERVISOR TESTS POSITIVE ON FITNESS-FOR-DUTY TEST |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53599

"At 1115 EDT on September 12, 2018,

Southern Nuclear Operating Company (SNC) determined a contractor supervisor confirmed positive for drugs during a Fitness-for-Duty (FFD) test.

The employee's unescorted access to the plant has been suspended.

The Resident Inspector has been notified."

[ This is not a re-post of yesterdays FFD, it is a separate event. ]


----------- [ 2018 event history for GA_Vogtle ]

20180911 | GA_Vogtle_3,4 | CONTRACTOR SUPERVISOR TESTS POSITIVE ON FITNESS-FOR-DUTY TEST |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53595

20180824 | GA_Vogtle_3,4 | CONTRACTOR SUPERVISOR SUBVERTS A FOLLOW-UP FITNESS FOR DUTY TEST |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53563

20180808 | GA_Vogtle_3,4 | CONTRACTOR SUPERVISOR TESTS POSITIVE FOR ALCOHOL |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53538

20180727 | GA_Vogtle_3,4 | CONTRACTOR SUPERVISOR TESTS POSITIVE FOR ALCOHOL |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53528

20180726 | GA_Vogtle_3,4 | CONTRACTOR SUPERVISOR SUBVERTS A FOR-CAUSE FITNESS FOR DUTY TEST |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53526

20180718 | GA_Vogtle_3,4 | NON-LICENSED CONTRACT SUPERVISOR SUBVERTS FITNESS FOR DUTY TEST |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53517

20180718 | GA_Vogtle_3,4 | CONTRACTOR SUPERVISOR TESTED POSITIVE FOR ALCOHOL |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53515

20180717 | GA_Vogtle_3,4 | NON-LICENSED CONTRACT SUPERVISOR TESTS POSITIVE ON FITNESS FOR DUTY TEST |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53511

20180709 | GA_Vogtle_3,4 | CONTRACTOR SUPERVISOR TESTS POSITIVE ON FITNESS FOR DUTY TEST |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53499

20180703 | GA_Vogtle_1 | MANUAL REACTOR TRIP DUE TO HIGH STEAM GENERATOR WATER LEVEL |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53484

20180628 | GA_Vogtle_3,4 | FITNESS-FOR-DUTY TEST POSITIVE FOR NON-LICENSED SUPERVISOR |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53479

20180622 | GA_Vogtle_3;4 | NON-LICENSED SUPERVISORY CONTRACTOR SUBVERTS FITNESS FOR DUTY TEST |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53469

20180516 | GA_Vogtle_3;4 | FITNESS-FOR-DUTY TEST POSITIVE FOR NON-LICENSED SUPERVISOR |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53403

20180402 | GA_Vogtle_3;4 | CONTRACTOR SUPERVISOR TESTS POSITIVE DURING FITNESS FOR DUTY TEST |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53309

20180321 | GA_Vogtle_3;4 | FITNESS FOR DUTY TEST SUBVERSION |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53277
[ This EN has been removed from the NRC website ]

20180220 | GA_Vogtle_3;4 | FITNESS FOR DUTY - CONTRACT SUPERVISOR SUBVERTS FITNESS FOR DUTY TEST |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53221


--------------------------------------------------------------------------------------------------
----------- [ Part 21 Notice ]

20180913 | | PART 21 - MOTOR OPERATED POTENTIOMETER DEFECT |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53600

"A batch of Motor Operated Potentiometers (MOPs) supplied by ESI [Engine Systems Inc.] were found to contain motors that, as they accumulate run time, exhibit increasing current draw and eventually exceed the MOP circuit allowance.

Consequently,the motor operation becomes erratic which leads to a sluggish MOP.

The MOP is used in a safety-related system to control emergency diesel generator (EDG) output voltage.

Failure of the MOP to operate properly can negatively affect the EDG output voltage
which affects associated components required to safely shutdown the nuclear reactor.

"ESI will revise the test procedure to incorporate an extended run time while trending the motor for any adverse changes.
This will be completed within 30 days and will prevent reoccurrence.
[ How comforting to know that we only have to wait 30 days for a conclusion, I'm sure any events that would require the EDG's will hold off until a solution is found. ]

"For Catawba, any MOPs from this batch are considered suspect and may be returned to ESI for rework or replacement.

For units installed, the motor performance should be assessed prior to continued use.

The voltage measured across terminals 3(-) and 4(+) while the MOP is operating should remain steady within a range of 22.8 to 25.2 VDC.
Any step change or reduction in voltage is an indication of motor deterioration.

"The root cause of the excessive current draw was found to be build-up of carbonaceous deposits between the commutator sections of the motor either from the carbon brushes, contamination, or a combination of the two.

As the motor accumulated run time, the deposits propagated to the point of a low resistance path between commutator sections which are wired to the armature poles.

This affected the magnetic field within the motor which had a direct impact on motor performance.
ESI has limited the issue to a single date code of motors supplied within a single batch of MOPs, as listed.

"Motor Operated Potentiometer, PIN 72-07900-100-ESI.

"Duke Energy Catawba, Customer PO 196046, Qty: 6, ESI Serial Number 3013905-1.1-1 thru 6,
MOP Serial Number - H01931980, H01995582, H01995584, H01995585, H01995586, H01995587, C-of-C Date: 5/30/2015."

[ So far this only identifies SC_Catawba_1;2 as affected. ]

[ Timing couldn't be worse, Catawba is SW of Charlotte, North Carolina, potentially in the impact path of hurricane Florence. ]  

----------------------------------------------------------------------------------------------------------------------------------------------------
----------------- Other reactor info from daily power tracking
-----------------------------------------------------------------------------------------------------------------

[ the asterisk signifies that an uptick in rad detection at nearby EPA radmon stations was observed on NETC. ]
[ NETC reflecting EPA stn data ]


Region 1

PA_BeaverValley_2 @ 99 % [ coastdown to RFO 20181021 ]

MD_Calvert_Cliffs_2 @ 100 % up from 83 % ; 100 % , no EN, reason for power drop unk.

NY_Fitzpatrick_1 @ 0 % [ begin RFO 20180910 ]

NY_Indian_Point_2 @ 0 % TECHNICAL SPECIFICATION REQUIRED SHUTDOWN |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53589

NJ_Oyster_Creek_1 @ 70 % unch from 70 % Jul 29 [ coastdown to permanent shutdown 20180917 ]

PA_Peach_Bottom_2 @ 96 % [ coastdown to RFO 20181015 ]  

PA_Peach_Bottom_3 @ 100 % up from 97 % ; 98 % ; 84 % ; 62 % Sunday ; 36 % Saturday , no EN, reason for power drop unk.

MA_Pilgrim_1 @ 48 % down from 90 % ; 85 % ; 72 % unch from 72 % Saturday , no EN, cooling water too warm.

NJ_Salem_2 @ 92 %  [ coastdown to RFO 20181011 ]


Region 2


AL_BrownsFerry_1 @ 79 % unch from 79 % since Friday 20180810 , no EN, reason for power drop unk.
[ RFO 20181011 ]

NC_Brunswick_1 @ 88 % down from 100 % , no EN, reason for power drop unk.

NC_McGuire_2 @ 99 % down from 100 % ; 99 %  [ coastdown to RFO 20180915 ]

FL_Saint_Lucie_2 @ 0 % [ RPV OPEN ( RFO )  ]

TN_Watts_Bar_1 @ 98 % down from 100 % ; 97 % [ coastdown to RFO 20180918 ]



Region 3


IL_Byron_1 @ 0 % [ Begin RFO 20180910 ]

IL_Clinton_1 @ 98 % unch from 98 % Sunday up from 95 % Saturday , no EN, reason for power drop unk. [ 99 % is this units normal max power ]

IL_Dresden_3 @ 97 % [ coastdown to RFO 20181031 ]

IA_DuaneArnold_1 @ 0 % [ RPV OPEN ( RFO )  ], last RFO ref Closing announcement.

MN_Prairie_Island_1 @ 83 % [ coastdown to RFO 20180921 ]



Region 4

NE_Cooper_1 @ 92 % [ coastdown to RFO 20180929 ]


----------------------------------------------------------------------------------------------------------------------------------------------------

[ There are currently 2 units with the RPV open - ref the 2018 Fall Refueling Outage Schedule and Status ]

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