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NPW_Watch Jul 02, 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 July 02, 2018  
https://www.nrc.gov/reading-rm/doc-colle...702en.html
[ event times not entered ]
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----------------- Power Reactor Event Notices
----------------------------------------------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------
----------- [ Current event for OH_Perry_1 ]

20180701 | OH_Perry_1 | BLOWN FUSE LEADS TO LOSS OF SAFETY FUNCTION |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53481

"On July 1st, 2018 at 0100 [EDT], a portion of the Division 1 Emergency Core Cooling System (ECCS) Loss Of Coolant Accident (LOCA) initiation logic was declared inoperable due to the discovery of a blown fuse.
The fuse was replaced at 0215 on July 1st, 2018 and the Division 1 ECCS LOCA initiation logic was declared operable at 0230 on July 1st, 2018.

"The blown fuse caused the loss of a portion of the Division 1 ECCS LOCA initiation logic which would have prevented the initiation of the Emergency Closed Cooling (ECC) A system.
ECC A and supported systems were declared inoperable.

Low Pressure Core Spray (LPCS) was one of the supported systems that were declared inoperable.
LPCS is considered a single train safety system.
Inoperability of LPCS is considered an 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 mitigate the consequences of an accident.

"The blown fuse also caused the loss of a portion of the Division 1 ECCS LOCA initiation logic which would have prevented the automatic isolation of Nuclear Closed Cooling and Instrument Air to the Containment.
The loss of Containment isolation capability is considered an 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 mitigate the consequences of an accident.

"This event is being reported in accordance with 10 CFR 50.72(b)(3)(v)(D)

"The NRC Senior Resident Inspector has been notified."

[ While this may seem like a mundane Event Notice it gives rise to several questions. ]
[ What caused the fuse to blow? ]
[ Was there an event that required the ECCS to activate resulting in the blown fuse? ]
[ Was the loss of containment isolation the reason why OH_Cleveland EPA radmon showed increased activity around the time mentined? ]

[ OH_Perry is approx 65km ( 40 mi ) NorthEast of Clevleand. ]  

[ CPM of gamma in energy range 600-800 keV for OH_Cleveland ]

20180701 00:58:00 GMT-0400 | 291 CPM <- R3 on NETC
20180701 01:59:00 GMT-0400 | 299 CPM <- R3 on NETC

20180701 02:59:00 GMT-0400 | 305 CPM <- R4 on NETC
20180701 03:59:00 GMT-0400 | 310 CPM <- R4 on NETC
20180701 04:59:00 GMT-0400 | 306 CPM <- R4 on NETC
20180701 05:59:00 GMT-0400 | 307 CPM <- R4 on NETC
20180701 07:00:00 GMT-0400 | 324 CPM <- R4 on NETC
20180701 08:00:00 GMT-0400 | 348 CPM <- R4 on NETC
20180701 09:00:00 GMT-0400 | 327 CPM <- R4 on NETC
20180701 10:00:00 GMT-0400 | 305 CPM <- R4 on NETC

20180701 11:00:00 GMT-0400 | 276 CPM <- R3 on NETC
20180701 12:01:00 GMT-0400 | 246 CPM <- R3 on NETC

[ There was a lot of unreported events ( ie power drops ) at several units over the weekend. ]
[ Coincidentally EPA radnet stations were offline intermittently. ]  






----------- [ 2018 event history for OH_Perry ]

[ There are no other ENs for this site ]


--------------------------------------------------------------------------------------------------
----------- [ 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 @ 47 % : 47 % ; 47 % Saturday | 76 % , no EN, reason for power drop unk.

*NY_Fitzpatrick_1 @ 99 % : 99 % , no EN, reason for power drop unk.

*NJ_Hope_Creek_1 @ 100 % Saturday up from 77 % ; 66 % , no EN, reason for power drop unk.

NJ_Oyster_Creek_1 @ 85 % down from 98 % Sunday ; 100 % Saturday ; 99 % ; 99 % , no EN, reason for power drop unk.

*MA_Pilgrim_1 @ 100 % ; 100 % Sunday ; 40 % Saturday : 34 % ; 34 % ; 90 % ; 90 % ; 98 % ; 98 % ; 90 % on Saturday, no EN, reason for power drop unk.




Region 2


AL_Browns_Ferry_3 @ 96 %
[ Unit unable to achieve full power since exiting RFO Apr 03 ] ( used 45 of typ 43 days )

*NC_Brunswick_2 @ 61 % down from 80 % Sunday ; 72 % Saturday ; 49 % ; 19 % ; 2 % ; 0 % ; 0 % ; 0 % Sunday ; 15 % Saturday, no EN, reason for power drop unk.

*TN_Watts_Bar_2 @ @ 45 % ; 45 % Sunday ; 28 % Saturday ; 13 % up from 0 % ; 0 % ; 0 % ; 0 % ; 0 % ; 0 %
AUTOMATIC REACTOR TRIP | https://www.nrc.gov/reading-rm/doc-colle...ml#en53467



Region 3

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

*OH_Perry_1 * 94 % down from 95 % Sunday ; 96 % Saturday - see EN above.



Region 4

*AR_Arkansas_1 @ 99 % ; 99 % Sunday ; 98 % Saturday ; 97 % ; 85 % ; 31 % ; 0 %  
[ Attempting 3rd restart after RFO ]  

*NE_Cooper_1 @ 100 % up from 88 % sunday , no EN, reason for power drop unk.

*AZ_PaloVerde_3 @ 21 % up from 1 % Sunday ; 0 % Saturday - recovering from
AUTOMATIC REACTOR TRIP ON LOW STEAM GENERATOR WATER LEVEL | https://www.nrc.gov/reading-rm/doc-colle...ml#en53477



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

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