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NPS_Watch Jun 25, 2019
#1
The Daily Dose - Exposing the nuclear power industry while the nuclear power industry exposes you.

There are/is 3 EN(s) today, 1 associated with power stations.

[ ]

NRC Event Notices for June 25, 2019 |
https://www.nrc.gov/reading-rm/doc-colle...625en.html

[ ]

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----------------- Power Reactor Event Notices
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----------- [ Current event for NY_Fitzpatrick_1 ]

20190624 | NY_Fitzpatrick_1 | POTENTIAL UNANALYZED CONDITION DUE TO UNPROTECTED CONTROL CIRCUITS RUNNING THROUGH MUTILPLE FIRE AREAS |
https://www.nrc.gov/reading-rm/doc-colle...ml#en54130


"During a review of industry Operating Experience it was identified that there were unprotected DC control circuits
for non safety-related DC motors which are routed from the Battery Charger Rooms to other separate fire areas.

Circuit Breakers used to protect the motor power conductors appear to be inadequate to protect the control conductors.

The concern is that under fire safe shutdown conditions,
it is postulated that a fire in one area can cause short circuits potentially resulting in secondary fires or cable fires
in other fire areas where the cables are routed.

The secondary fires or cable failures are outside the assumptions of the 10 CFR 50 Appendix R Safe Shutdown Analysis.

"This condition is reportable as an 8-hour ENS report in accordance with 10 CFR 50.72(b)(3)(ii)(B) as an unanalyzed condition.

Requirements of the Technical Requirements Manual (TRM) for the affected fire areas will be implemented."


The licensee has notified the NRC resident inspector.


----------- [ 2019 event history for NY_Fitzpatrick ]

20190116 | NY_Fitzpatrick_1 | SECONDARY CONTAINMENT DIFFERENTIAL PRESSURE EXCEEDED TECHNICAL SPECIFICATION ALLOWED VALUE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53828


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----------- [ Current event for
----------- [ 2019 event history for
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----------- [ Current event for
----------- [ 2019 event history for
[ no previous ENs for this site in 2019 ]
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----------- [ Current event for
----------- [ 2019 event history for
[ no previous ENs for this site in 2019 ]
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------------[ PART 21 ] - These ENs are for issues that involve multiple site/reactor units
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------------Other reactor info from daily power tracking https://www.nrc.gov/reading-rm/doc-colle...atus/2019/
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[  ]

Region 1

MA_Pilgrim_1 @ 0 % - PERMANENT SHUTDOWN



Region 2

NC_Brunswick_1 @ 100 % up from 85 % down from 90 % Sunday; 93 % Saturday
[ no EN, unk reason for power drop ]


Region 3  

IL_Clinton_1 @ 98 % unch from 98 % 20190621
[ 98-99 % are this units normal thermal power range. ]


Region 4

AR_Arkansas_2 @ 0 % unch from 0 % since 20190527
 AUTOMATIC REACTOR TRIP DUE TO A REACTOR COOLANT PUMP TRIP ON GROUND FAULT |
 https://www.nrc.gov/reading-rm/doc-colle...ml#en54091


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[ There is/are currently 00 unit(s) with the RPV OPEN - ref the 2019 Spring Refueling Outage Schedule and Status ]

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