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NPS_Watch May 01, 2018
#1
The Daily Dose - Exposing the nuclear power industry while the nuclear power industry exposes you.


There are 6 EN(s) today, 1 associated with power stations.

 

NRC Event Notices for May 01, 2018         
https://www.nrc.gov/reading-rm/doc-colle...501en.html

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

----------- [ Current event for IL_Braidwood_1 ]

20180430 | IL_Braidwood_1 | AUTOMATIC REACTOR TRIP FOLLOWING TURBINE TRIP |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53371

"At 1124 CDT, Braidwood Unit 1 experienced an automatic Reactor Trip.
The cause of the Reactor Trip was a Turbine Trip with reactor power greater than P-8.
The turbine trip was actuated as a result of a Turbine Motoring Generator Trip.
The cause of the generator trip is unknown at this time and is under investigation.

"After the Reactor Trip occurred, the 1A Auxiliary Feedwater pump was manually started to provide feedwater flow to all four steam generators.
The 1A Auxiliary Feedwater pump was subsequently secured and placed in standby when the Startup Feedwater pump was placed in service.

"Train A Main Control Room Ventilation Filtration system shifted to Makeup Mode due to a spurious actuation signal.

"No secondary relief valves lifted and no secondary steam was released as a result of the Reactor Trip.
The Main Steam dump valves are in service to the Main Condenser to provide heat sink cooling.
The plant is being maintained at normal operating pressure and temperature.
AC power is being provided by Offsite Power with the Diesel Generators in standby and all safety systems available.
There is no impact to Unit 2.

"This report is being made per 10 CFR 50.72(b)(2)(iv)(B) for a RPS actuation, 4-hr notification,
and per 10 CFR 50.72(b)(3)(iv)(A) for a manual actuation of the Auxiliary Feedwater system, 8-hr notification."

The licensee notified the NRC Resident Inspector and Illinois Emergency Management Agency.

[ This event occurred while the unit was at 48 %. The unit reports 12 % power at the AM reporting. ]
[ I think there's more going on here then they are revealing. The power tracking shows that all the Illinois units had lowered power. ]
[ The only units that didn't report lowered power were LaSalle_1 and QuadCities_2, both were refueled earlier this year. ]
[ It's also not normal for the state EMA to be notified whenever a reactor scrams. ]

----------- [ 2018 event history for IL_Braidwood ]

20180430 | IL_Braidwood_1 | Exit RFO

20180422 | IL_Braidwood_1 | UNDERVOLTAGE ACTUATION OF THE ENGINEERED SAFETY FEATURE BUS |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53358

20180420_1730_CDT | IL_Braidwood_1 | DEGRADED REACTOR VESSEL HEAD |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53354

20180420_1042_CDT | IL_Braidwood_1 | BOTH DIESEL GENERATORS INOPERABLE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53353

20180419 | IL_Braidwood_1 | UNDERVOLTAGE ACTUATION OF THE ENGINEERED SAFETY FEATURE BUS |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53347

20180409 | IL_Braidwood_1 | Begin RFO


20180126 | IL_Braidwood_1;2 | Update LOSS OF ASSESSMENT CAPABILITY DUE TO TECHNICAL SUPPORT CENTER PLANNED MAINTENANCE  |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53180

20180123 | IL_Braidwood_1;2 | LOSS OF ASSESSMENT CAPABILITY DUE TO TECHNICAL SUPPORT CENTER PLANNED MAINTENANCE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53180

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

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

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

Region 1



MA_Pilgrim_1 @ 0 %, no EN, reason for power drop unknown.
[ Just came off a 42 day SD, ran a whole 3 days at full power. 397 days to permanent closure. ]



Region 2

AL_Browns_Ferry_3 @ 85 % since APR 13 ( used 45 of typ 43 days )
[ This unit has not been able to achieve full power since exiting RFO Apr 03 ]




Region 3

IL_Braidwood_1 @ 12 % restarting ( used 21 of typ 18 days )

IL_Braidwood_2 @ 99 % up from 73 %, No EN, unk reason for power drop.

IL_Byron_1 @ 97 % up from 72 %, No EN, unk reason for power drop.

IL_Byron_1 @ 96 % up from 72 % down from 90 %, No EN, unk reason for power drop.

IL_Dresden_2 @ 100 % up from 84 %, No EN, unk reason for power drop.

IL_Dresden_3 @ 100 % up from 84 %, No EN, unk reason for power drop.

IL_LaSAlle_2 @ 65 % up from 63 %, No EN, unk reason for power drop.

IL_QuadCities_1 @ 99 % up from 88 %, No EN, unk reason for power drop.

[  ]


MI_Fermi_2 @ 0 % 17th day down
AUTOMATIC REACTOR SCRAM AND EMERGENCY CORE COOLING SYSTEM INJECTION |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53336


Region 4



[ There are currently 8 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.
 
Reply
#2
The number of similar events recently reported gives rise to questions about computerized systems. This article, posted in CRL's NRC forum (Is NRC Cyber Aware? caferadlab.com/thread-2404-post-5352.html), may shed some light on core issues.

Nuclear Power Plants Have a 'Blind Spot' for Hackers. Here's How to Fix That.
https://motherboard.vice.com/en_us/artic...pply-chain
Pia
just pm me if needed.
 
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