ML19289E867
| ML19289E867 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 05/22/1979 |
| From: | Opeka J NORTHEAST UTILITIES |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| MP-2-4029, NUDOCS 7905290221 | |
| Download: ML19289E867 (1) | |
Text
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tiay 22,1979 MP-2 4029 Mr. Boyce H. Grier Director, Region I Office of Inspection and Enforcement U. S. Nuclear Regulatory Comission 631 Park Avenue King of Prussia, Pennsylvania 19406
Reference:
Facility Operating License No. DPR-65 Docket No. 50-336 Reportable Occurrence 50-336/79-12/1P
Dear Mr. Grier:
This letter forwards Licensee Event Report 79-12/lP, required to be submitted pursuant to the requirements of Millstone Unit 2 Appendix A Technical Specifications, Section 6.9.1.8.b.
While at 10% thermal power during the initial power ascension following a shutdown for refueling, two of the four linear power range channels were noted to be inoperable. The power ascension was halted and channel D was placed in the " bypass" condition, channel A was placed in the " tripped" condition and an investigation into the causes of the malfunctions was conducted.
Open connections were found between the channel A and D detector cables and the field wiring due to the pins being backed out at the connectors.
The connections were repaired and the channels returned to service.
Any further actions as a result of subsequent investigation will be addressed'in the two week report.
Yours truly,
~
. F. Opeka Station Superintendent Millstone Nuclear Power Station JF0/ECF:llm
/Q4/
$$/
cc:
Director, Office of Management Information and Program Control U. S. Nuclear Regulatory Comission, Washington, D.C. 20555 (2 copies) 7905290R:2/