ML19208B782
| ML19208B782 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 09/17/1979 |
| From: | Opeka J NORTHEAST UTILITIES |
| To: | |
| References | |
| MP-1-1298, NUDOCS 7909210386 | |
| Download: ML19208B782 (1) | |
Text
b$
'b
[ h [ behhb)bbh
~< ccwcicursarawa =t w=,4w p,o, gjax 270 N.U[$l$
HARTFORD, CONNECTICUT 06101 r.wo.,
,k k =, 3',,,:Z, L"2. 27lc".-
( * *"
y
,,.s m.
.m.-
September 17, 1979 f4P 1298 Mr. Boyce H. Grier Director, Region I Office of Inspection and Enforcement U. S. fluclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406
Reference:
Provisional. License No. DPR-21 Docket flo. 50-245 Reportable Occurrence R0-79-26/lP
Dear Mr. Grier:
This letter is forwarded to provide prompt notification of Reportable Occurrence R0-79-26/lP as required by the Hillstone Unit 1 Technical Specifications.
On September 14,1979 at 1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br /> a situation, not specifically considered in the safety analysis report or technical specificaticas that required corrective measures to prevent the existence of an unsafe condition, was
. discovered. After a review of control circuitry and logic associated with the 4100 volt breakers and their relationship to the loss of normal power scheme, it became apparent that the failure of a bus tie breaker during certain unit conditions could result in a loss of nomal power to the emergency buses. This situation has been cc ected and further infomation will be included in the required 14 cay follow-up report.
Yours truly, (pd ohn F. Opeka Station Superintendent Millstone fluclear Power Station JF0/PJP:llm
'cc: Director, Office of Management Information and Program Control (2)
[> 0 1
\\
7 9 0 9 210 3f s -
S