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NPS_Watch Jun 21, 2018
#1
The Daily Dose - Exposing the nuclear power industry while the nuclear power industry exposes you.


There are 5 EN(s) today, 3 associated with power stations.

[  ]

NRC Event Notices for June 21, 2018  
https://www.nrc.gov/reading-rm/doc-colle...621en.html
[ page nav working, event date are entered but event time not entered ]
----------------------------------------------------------------------------------------------------------------------------------------------------
----------------- Power Reactor Event Notices
----------------------------------------------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------
----------- [ Current event for AL_BrownsFerry_1;2;3 ]

20180620 | AL_BrownsFerry_1;2;3 | UNUSUAL EVENT DECLARED DUE TO TOXIC GAS RELEASE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53462

On June 20, 2018 at 1003 CDT, the licensee declared a Notification of Unusual Event based on Emergency Action Level (EAL) 6.5.U, toxic gas release on site.

The Notification of Unusual Event was terminated at 1025 CDT.

The toxic gas release occurred when site personnel were filling a fire suppression carbon dioxide (CO2) tank
outside the diesel generator building.

The relief valve in the common diesel generator room for Unit 1 and 2 diesel generators inadvertently lifted

causing a toxic gas environment by releasing CO2 into the room.

[ Overpressure from the tank being filled or did someone accidentally activate the relief valve ? ]

The licensee terminated the tank fill stopping the release of CO2,

and with the door to the room being opened, the gas cleared in about 20 minutes.

The licensee has notified the NRC Resident Inspector.

Notified DHS SWO, FEMA Ops, DHS NICC, FEMA NWC (email) and NuclearSSA (email).

----------- [ 2018 event history for AL_BrownsFerry ]

20180608 | AL_BrownsFerry_1 | Retract HIGH PRESSURE COOLANT INJECTION SYSTEM INOPERABLE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53340

20180608 | AL_BrownsFerry_1 | Retract ACCIDENT MITIGATION - HIGH PRESSURE COOLANT INJECTION DECLARED INOPERABLE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53014


20180417 | AL_BrownsFerry_1 | HIGH PRESSURE COOLANT INJECTION SYSTEM INOPERABLE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53340


20180403 | AL_BrownsFerry_3 | Exit RFO

20180329 | AL_BrownsFerry_1;2;3 | UNANALYZED CONDITION DUE TO INOPERABILITY OF EMERGENCY EQUIPMENT COOLING WATER PUMP |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53300
[ AL_BrownsFerry_1;2;3 @ 100;100;0 RX Mode: PO;PO;Cold Shutdown ]

20180322 | AL_BrownsFerry_1;2;3 | Update PART 21 - UNDERSIZED PACKING GLANDS IN CERTAIN CRANE GATE VALVES     
https://www.nrc.gov/reading-rm/doc-colle...ml#en53246
[ This EN is missing as of 04/18/2018 ]

20180318 | AL_BrownsFerry_1 | AUTOMATIC REACTOR SCRAM DUE TO TURBINE CONTROL VALVE CLOSURE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53269

20180316 | AL_BrownsFerry_1;2;3 | UNANALYZED CONDITION AFFECTING RESIDUAL HEAT REMOVAL SYSTEM |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53267
[ AL_BrownsFerry_1;2;3 @ 100;100;0 RX Mode: PO;PO;Refueling ]

20180307 | AL_BrownsFerry_1;2;3 | NOTIFICATION OF UNUSUAL EVENT DECLARED |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53247
[ AL_BrownsFerry_1;2;3 @ 100;100;0 RX Mode: PO;PO;Refueling ]

20180306 | AL_BrownsFerry_1;2;3 | Update PART 21 - UNDERSIZED PACKING GLANDS IN CERTAIN CRANE GATE VALVES |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53246

20180217 | AL_BrownsFerry_3 | Begin RFO


20180110 | AL_BrownsFerry_3 | AUTOMATIC REACTOR SCRAM DUE TO TURBINE CONTROL VALVE FAST CLOSURE SCRAM SIGNA |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53162

----------------------------------------------------------------------------------------------------------------------------------------------------
----------- [ Current event for IL_Clinton_1 ]

20180620 | IL_Clinton_1 | HIGH-PRESSURE CORE SPRAY INOPERABLE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53463

"On June 20, 2018, at 1145 hours (CDT), during panel walkdown,
it was identified that High-Pressure Core Spray (HPCS) injection valve 1E22F004 was in the open position.

Valve 1E22F004 is normally closed for containment integrity purposes.

Operations personnel verified that the valve was open locally and that the plant computer indicated the valve is in the 'not closed' position.

No alarms or status lamps indicated why the valve would be open and there was no valid demand signal.

Reactor power, pressure, level, and feedwater parameters remain steady and unchanged,
with no indication of HPCS injection having occurred or in progress.

"A low-water level signal, or a high drywell pressure signal, or manual operation initiates HPCS.

When a high-water level in the reactor vessel is detected,
HPCS injection is automatically stopped by a signal to close injection valve 1E22F004.

With valve 1E22F004 in the open position without a demand signal, closure on a high reactor water level condition was not assured.

Therefore, HPCS was declared inoperable.

The following Technical Specifications were entered:
3.5.1, Emergency Core Cooling Systems (ECCS) - Operating and
3.6.1.3, Primary Containment Isolation Valves (PCIVs).

"Subsequently, HPCS injection valve 1E22F004 was observed to be cycling without operator action.
The valve was deactivated in the closed position to assure the containment isolation function.

"The cause of valve 1E22F004 cycling without operator action is under investigation.

"HPCS is a single train safety system that consists of a single motor-driven pump, a spray sparger in the reactor vessel,
and associated piping, valves, controls and instrumentation.

HPCS is part of the ECCS network, which also includes Low-Pressure Core Spray, Low-Pressure Coolant Injection, and the Automatic Depressurization system.

"This event is being reported as an 8-hour non-emergency notification per
10 CFR 50.72(b)(3)(v) as, 'Any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to: (A) Shut down the reactor and maintain it in a safe shutdown condition; (B) Remove residual heat; © Control the release of radioactive material; or (D) Mitigate the consequences of an accident.'"

The licensee notified the NRC Resident Inspector.

[ Even though there's something wrong and they don't know what it is, the unit is still running at it's full capacity. ]
[ Safety systems be damned, maintain full profit running. ]


----------- [ 2018 event history for IL_Clinton ]

20180520 | IL_Clinton_1 | Exit RFO

20180517 | IL_Clinton_1 | EMERGENCY DIESEL GENERATORS INOPERABLE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53409
RFOD_018; RX Mode: Cold Shutdown; Cold Shutdown

20180430 | IL_Clinton_1 | Begin RFO ( orig sched for 4/20 )

20180330 | IL_Clinton_1 | PRIMARY CONTAINMENT DECLARED INOPERABLE DUE TO BOTH AIRLOCK DOORS OPEN SIMULTANEOUSLY |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53303

20180218 | IL_Clinton_1 | NRC Finalizes White Finding at Clinton Nuclear Power Plant |
https://www.nrc.gov/reading-rm/doc-colle...05.iii.pdf


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

20180620 | MN_PrairieIsland_1;2 | PART 21 - INTERIM REPORT NOTIFICATION |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53464

The following was received via phone call and email:

This report provides notification and interim information concerning an evaluation being performed by AAF Flanders

for an unapproved design change in a High Efficiency Particulate Air Filter. [ HEPA ]

"An evaluation is underway for filters that underwent a non-approved design change.
AAF Flanders has determined that an evaluation cannot be completed within the 60 day period.
Discovery of the potential deviation was May 2, 2018.

"The information required for the 60-Day Interim Report Notification 21.21(a)(2) was provided.
We anticipate that the evaluation will be completed by Sept 15, 2018.

"AAF Flanders is evaluating a potential nonconforming condition associated with filters (model number 0-007-C-42-03-NU-11-13-GG FU5)
supplied to Prairie Island Nuclear Generating Plant (PINGP) / Xcel Energy."

AAF Flanders notified Prairie Island Nuclear Plant of this potential defect.

[ Notice how vague this is, there's no description of what the suspect design change is or what impact it might cause. ]
[ Did the NRC leave out the detail or did the reporting entity? ]   

--------------------------------------------------------------------------------------------------
----------- [ Current event for
----------- [ 2018 event history for
--------------------------------------------------------------------------------------------------
----------- [ Part 21 Notice ]
----------------------------------------------------------------------------------------------------------------------------------------------------
----------------- Other reactor info from daily power tracking
-----------------------------------------------------------------------------------------------------------------

[ ]


Region 1

NY_FitzPatrick_1 @ 99 % unchanged 99 %, no EN, reason for power drop unk.

NY_Nine_Mile_Point_2 @ 100 % up from 63 %, no EN, reason for power drop unk.





Region 2


AL_Browns_Ferry_3 @ 94 % unchnged 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 )

SC_Robinson_2 @ 0 % shutdown 06/15, no EN, reason for power drop unk.

TN_Watts_Bar_2 @ 60 %, no EN, reason for power drop unk.


Region 3

IL_Dresden_2 @ 78 % up from 63 % ; 60 %, no EN, reason for power drop unk.




Region 4

AR_Arkansas_1 @ 65 % up from 40 % ; 2 % ; 0 % ; 0 %, recovering from MANUAL REACTOR TRIP DURING STARTUP     
https://www.nrc.gov/reading-rm/doc-colle...ml#en53459

MS_GrandGulf_1 @ 0 % RFO day 76 of the planned 50, wonder what they are fixing.


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

[ 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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