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NPS_Watch Jun 29, 2018
#1
The Daily Dose - Exposing the nuclear power industry while the nuclear power industry exposes you.

There are 4 EN(s) today, 2 associated with power stations.

[ NRC backposted yesterday's ENs, they added 3 associated with power stations, see the Jun 28 report. ]

NRC Event Notices for June 29, 2018  
https://www.nrc.gov/reading-rm/doc-colle...629en.html
[ event times not entered ]
----------------------------------------------------------------------------------------------------------------------------------------------------
----------------- Power Reactor Event Notices
----------------------------------------------------------------------------------------------------------------------------------------------------

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

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

At 0902 EDT on June 28, 2018, a non-licensed employee supervisor had a confirmed positive for alcohol during a random fitness-for-duty test. The employee's access to the plant has been terminated.

The NRC Resident Inspector has been notified.

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

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

--------------------------------------------------------------------------------------------------
----------- [ Current event for AZ_PaloVerde_3 ]
{ This is an NRC repost of yesterdays backposted EN ]

20180627 | AZ_PaloVerde_3 | AUTOMATIC REACTOR TRIP ON LOW STEAM GENERATOR WATER LEVEL |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53477

"The following event description is based on information currently available.
If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time,
a follow-up notification will be made via the ENS [Emergency Notification System] or under the reporting requirements of 10 CFR 50.73.

"On June 27th, 2018 at approximately 2310 Mountain Standard Time (MST), in Palo Verde Unit 3,
the #1 Steam Generator Economizer valve started closing.

[ Could this unexpected closure be related to this EN? ]
DEFECT REGARDING CERTAIN PRESSURE TRANSMITTERS AND AMPLIFIER CIRCUIT CARD ASSEMBLIES |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53263

[ Notice in the following sequence of events how one failure caused another. ]

This caused Steam Generator #1 water level to decrease.

Both Feed water pumps speed increased to raise Steam Generator level.

At approximately 2311 [MST], the B Main Feed water pump tripped resulting in a Reactor Power Cutback.

Steam Generator #1 level continued to decrease resulting in an Automatic Reactor Trip on Low Steam Generator #1 water level.

All control rods inserted to shut down the Reactor to Mode 3 using Main Feed water and Steam Bypass.

Post trip Steam Generator #1 level then increased and at approximately 2316 [MST] a Main Steam Isolation Signal (MSIS) was received on high Steam Generator level.

The 'B' Auxiliary Feed water pump was manually started to maintain Steam Generator water levels

and Steam Generator pressure was controlled using the Atmospheric Dump Valves (ADVs).

"Following the reactor trip, all CEAs [Control Element Assemblies] inserted fully into the core.

All systems operated as expected.

No emergency plan classification was required per the Emergency Plan.

Safety related busses remained powered during the event from offsite power and the offsite power grid is stable.

No major equipment was inoperable prior to the event that contributed to the event or complicated operator response.

Unit 3 is stable and in Mode 3 feeding Steam Generators with Auxiliary Feed water Pump 'B'.

The event did not result in any challenges to fission product barriers and there were no adverse safety consequences as a result of this event.

The event did not adversely affect the safe operation of the plant or the health and safety of the public.

[ NETC showed an increase in rad activity surrunding this event. ]

"The NRC Resident Inspector was informed of the Unit 3 reactor trip."

Unit 1and Unit 2 were unaffected by the Unit 3 trip.

[ The fact that it was an automatic shutdown instead of a manual shutdwn tells us that events and system failures progressed faster than the operators could figure out what was happening and respond. ]


----------- [ 2018 event history for AZ_PaloVerde ]

20180523 | AZ_PaloVerde_2 | AUTOMATIC REACTOR TRIP ON LOW DEPARTURE FROM NUCLEATE BOILING RATIO |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53424

20180505 | AZ_PaloVerde_3 | Exit RFO

20180410 | AZ_PaloVerde_3 | Begin RFO

20180315 | AZ_PaloVerde_1;2;3 | DEFECT REGARDING CERTAIN PRESSURE TRANSMITTERS AND AMPLIFIER CIRCUIT CARD ASSEMBLIES |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53263

20180216 | AZ_PaloVerde_1 | Update AUTOMATIC REACTOR TRIP DUE TO LOW DEPARTURE FROM NUCLEATE BOILING SIGNAL |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53215

20180215 | AZ_PaloVerde_1 | AUTOMATIC REACTOR TRIP DUE TO LOW DEPARTURE FROM NUCLEATE BOILING SIGNAL |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53215

--------------------------------------------------------------------------------------------------
----------- [ Current event for
----------- [ 2018 event history for
--------------------------------------------------------------------------------------------------
----------- [ Part 21 Notice ]
----------------------------------------------------------------------------------------------------------------------------------------------------
----------------- 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. ]


Region 1

*PA_BeaverValley_1 @ 76 % , no EN, reason for power drop unk.

*NJ_Hope_Creek_1 @ 77 % up from 66 % , no EN, reason for power drop unk.

NJ_Oyster_Creek_1 @ 99 % ; 99 % , no EN, reason for power drop unk.

*MA_Pilgrim_1 @ 34 % ; 34 % ; 90 % ; 90 % ; 98 % ; 98 % ; 90 % on Saturday, no EN, reason for power drop unk.

*NJ_Salem_2 @ 100 % up from 99 % , no EN, reason for power drop unk.




Region 2


AL_Browns_Ferry_3 @ 96 % ; 96 % ; 96 % ; 96 % ; 96 % ; 94 % ; 94 % ; 94 % ; 91 % ; 79 % : 52 % ; 52 % saturday, no EN, reason for power drop unk.  
[ Unit unable to achieve full power since exiting RFO Apr 03 ] ( used 45 of typ 43 days )

*NC_Brunswick_2 @ 49 % up from 19 % ; 2 % ; 0 % ; 0 % ; 0 % Sunday ; 15 % Saturday, no EN, reason for power drop unk.

*TN_Watts_Bar_2 @ @ 13 % up from 0 % ; 0 % ; 0 % ; 0 % ; 0 % ; 0 % ; 85 % ; 60 %, no EN, reason for original power drop unk.


Region 3

IA_DuaneArnold_1 @ 100 % up from 99 % ; 99 %, no EN, reason for power drop unk.




Region 4

*AR_Arkansas_1 @ 97 % up from 85 % ; 31 % ; 0 % , no EN, reason for shutdown unk.
[ Attempting 3rd restart after RFO ]  

*AZ_PaloVerde_3 @ 0 % ; 0 %


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

[ There are currently 0 units with the RPV open - ref the Current ReFueling Outage Schedule and Status ]

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