05000336/LER-1980-036-03, /03L-0:on 801023,during Power Ascension Testing, Reactor Protection Sys Channel D Tripped on High Power. Caused by Reversal of Upper & Lower Detector Signal Cable Connections.Cables Switched & Recalibr

/03L-0:on 801023,during Power Ascension Testing, Reactor Protection Sys Channel D Tripped on High Power. Caused by Reversal of Upper & Lower Detector Signal Cable Connections.Cables Switched & Recalibr

ML19345A842
Person / Time
Site:	Millstone
Issue date:	11/20/1980
From:	Bates R NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19345A835	List: 05000336/LER-1980-036, Forwards LER 80-036/03L-0 05000336/LER-1980-036-03, /03L-0:on 801023,during Power Ascension Testing, Reactor Protection Sys Channel D Tripped on High Power. Caused by Reversal of Upper & Lower Detector Signal Cable Connections.Cables Switched & Recalibr
References
LER-80-036-03L, LER-80-36-3L, NUDOCS 8011250320
Download: ML19345A842 (1)

LER-1980-036, /03L-0:on 801023,during Power Ascension Testing, Reactor Protection Sys Channel D Tripped on High Power. Caused by Reversal of Upper & Lower Detector Signal Cable Connections.Cables Switched & Recalibr

Event date:
Report date:
3361980036R03 - NRC Website

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63 G3 EVENT DATE 74 75 REPORT DATE b3 60 c1 OOCK ET NUMSE R tveur DESCnlPrioN AND PHOOABLE CONSEQUEJCES h During po;er ascension testing following the unit refueling the Reactor Protection l

7,g g System (RPS) channel D trips on fligh Power, Local Power Density and Thermal tiargin/

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.,g Low Pressure were declared inoperable.

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,g section 3.3.1.1, action 2b the trips were bypassed and operation continued.

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31 40 43 42 43 44 41 CAUSE OESCRIPTION AND CORRECTIVE ACTIONS [TJT] l The inoperable trip functions were the result of the channel D nuclear power upper I

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