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NPS_Watch Sep 07, 2018
#1
The Daily Dose - Exposing the nuclear power industry while the nuclear power industry exposes you.

There are 4 EN(s) today, 1 associated with power stations.

[   ]

NRC Event Notices for September 07, 2018 |
https://www.nrc.gov/reading-rm/doc-colle...07ren.html
[ event times not entered ]
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----------------- Power Reactor Event Notices
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----------- [ Current event for NY_NineMilePoint_1 ]

20180907 | NY_NineMilePoint_1 | INVALID SPECIFIED SYSTEM ACTUATION |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53584

"Pursuant to 50.73(a)(1) the following information is provided as a sixty (60) day telephone notification to the NRC.
[ Way past the 60 day mark. ]


This notification, reported under 50.73(a)(2)(iv), is being provided in lieu of the submittal of a written LER [Licensee Event Report] to report a condition that resulted in an invalid actuation of the high pressure coolant injection (HPCI).

At Nine Mile Point Unit 1, HPCI is a flow control mode of the normal feedwater system and is not an emergency core cooling system.

"On March 19, 2018 Nine Mile Point Unit 1 (NMP1) was at 0 percent power and in cold shutdown in support of a planned maintenance outage.
At approximately 0118 [EDT], a reactor water level transient initiated by the fill and vent of 12 Reactor Recirculation Pump (12 RRP) occurred.
During the fill and vent, Reactor Pressure Vessel (RPV) level lowered quickly from the initial level of 68 inches and a low level alarm was received.
Control Room Operators reduced Reactor Water Clean-Up (RWCU) reject flow to turn the level trend and clear the low level alarm generated off of the compensated, GEMAC, level instrumentation.
RWCU reject flow was reduced by 50 percent which caused RPV level to start to rise.
RPV level was raised to approximately 72 inches at which time the Reactor Operator began to raise reject flow to reestablish the normal level band.

During the RPV level transient, with actual water level at 74 inches on the GEMAC, the Yarway level instrumentation, which is not density compensated and therefore invalid, reached 92 inches causing an invalid high RPV water level turbine trip signal and associated invalid HPCI initiation signal.
[ How long before they ignore a valid warning from an instrument they consider "invalid"? ]

At no point in time did actual RPV water level reach the high RPV water level turbine trip set point of 92 inches.
[ How do they know this if the instrument they use to measure this is considered "invalid" ? ]

The potential for a turbine trip signal to occur due to shutdown activities was understood and tags were hung to lockout the Feedwater Pumps to prevent the HPCI start signal.

Therefore, no HPCI injection occurred.

"The Licensee has notified the NRC Resident Inspector."

[ A cryptic EN on an event from March when NMP1 was briefly shutdown. ]
 

----------- [ 2018 event history for NY_NineMilePoint ]

20180828 | NY_NineMilePoint_2 | Update AUTOMATIC SCRAM DUE TO A GENERATOR TRIP |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53565


20180827 | NY_NineMilePoint_2 | AUTOMATIC SCRAM DUE TO A GENERATOR TRIP |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53565


20180519 | NY_NineMilePoint_2 | achieved full power ( 06 )

20180513 | NY_NineMilePoint_2 | Exit RFO ( 27 / 33 )

20180510 | NY_NineMilePoint_2 | VALID EMERGENCY DIESEL START ON PARTIAL LOSS OF OFFSITE POWER |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53395
RFOD_025; RX Mode: Cold Shutdown; Cold Shutdown

20180416 | NY_NineMilePoint_2 | Begin RFO ( 23 day coastdown )


20180321 | NY_NineMilePoint_1;2 | Retract PART 21 - DEFECTIVE SAFETY RELATED VALVES |
https://www.nrc.gov/reading-rm/doc-colle...ml#en52857

20180201 | NY_NineMilePoint_2 | UNUSUAL EVENT - FIRE IN THE TURBINE BUILDING LASTING GREATER THAN 15 MINUTES |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53190

20180131 | NY_NineMilePoint_1;2 | Update PART 21 - DEFECTIVE SAFETY RELATED VALVES |
https://www.nrc.gov/reading-rm/doc-colle...ml#en52857

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

----------- [ 2018 event history for

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

----------- [ 2018 event history for  


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


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


NY_Fitzpatrick_1 @ 82 % [ coastdown to RFO 20180910 ]

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

PA_Peach_Bottom_2 @ 98 % [ coastdown to RFO 20181015 ]  

MA_Pilgrim_1 @ 70 % down from 95 % ; 42 % ; 42 % ; 42 % Sunday ; 40 % Saturday , no EN, reason for power drop unk.

NJ_Salem_2 @ 97 %  [ coastdown to RFO 20181011 ]

PA_Susquehanna_1 @ 100 % up from 99 % ; 100 %  , no EN, reason for power drop unk.

PA_Susquehanna_2 @ 100 % up from 96 % ; 95 % ; 100 % ; 98 % ; 87 % Sunday ; 67 % Saturday down from 100 % , no EN, reason for power drop unk.



Region 2

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

FL_Saint_Lucie_2 @ 0 % [ ReFueling Outage ( RFO )  ]




Region 3

IL_Byron_1 @ 83 % [ coastdown to RFO 20180910 ]

IL_Clinton_1 @ 88 % up from 80 % ; 78 % ; 80 % 80 % ; 78 % Sunday ; 84 % Saturday , no EN, reason for power drop unk. [ 99 % is this units normal max power ]

IL_Dresden_3 @ 99 % [ coastdown to RFO 20181031 ]

IA_DuaneArnold_1 @ 0 % [ ReFueling Outage ( RFO )  ], last RFO ref Closing announcement.

OH_Perry_1 @ 100 % up from 96 % ; 92 % ; 96 % ; 92 % ; 96 % Sunday ; 96 % Saturday , no EN, reason for power drop unk. [ 99 % is this units normal max power ]

MN_Prairie_Island_1 @ 87 % [ coastdown to RFO 20180921 ]



Region 4

NE_Cooper_1 @ 94 % [ coastdown to RFO 20180929 ]

AZ_PaloVerde_2 @ 99 % [ coastdown to RFO 20181008 ]


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[ There are currently 1 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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