ML17252A803
| ML17252A803 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 03/05/1975 |
| From: | Stephenson B Commonwealth Edison Co |
| To: | James Keppler NRC/RGN-III |
| References | |
| Download: ML17252A803 (1) | |
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815911244119 TDBN MORRIS IL 155 03@0249P EST Pt'IS JAMES G KEPPLER, REGIONAL DIRECTOR, DIRECTORATE OF REGULATORY OPERATIONS, REGION 3, U.S. ATOMIC ENERGY COMMISSION, WUX:
799. ROOSEVELT RD GLEN ELLYN IL 60137
SUBJECT:
DPR-25, DRESDEN NUCLEAR POvJEJ( STATIO*N UNIT* 3.
THIS \\tJILL CO[ff!Rf<; f\\ CONVERSATION VJITH Pl-fIL JOHNSO~! OF YOIJ 1~ OFFICE AT 1540 HOUHS 4 MARCH CONCERNING LOCATION. DURINC.; CONTROL ROD; DRIVE
-EXERCISING OF FAILURE OF 3-2X2 CRD ARRAYS TO MEET THE TECk SPEC.
LIMIT FOR FIVE PERCENT SCRAM INSERTION TIME FOR THE THREE:FASTEST I
CONTROL RODS IN A 2X2 ARRAY. T1l0 *oF THESE THREE, PLUS ONE :ADDITIONAL
- .ARRAY ALSO FAILED TO MEET THE TWENTY PERCENT INSERTION TIME LIMIT.
THESE DRIVES 11/ILL EE SCRAM TESTED AC;AifV AND IP FOUND WITHl1N Llf'iITS i.....
SF-1201 (RS-69)
\\\\!ILL**BE CLOSELY MONITORED DUHING OPERATION. IT IS SUSPECTED P!AT THE SLOW TIMES ARE ATTRIBUTABLE TO BOTH A NORMAL WEAR PROBLEM
~ND BY A PREVIOUS TEN DAY OUTAGE DUF?ING WHICH TIME CRUD DEPOSITS MAY1 HAVE SETTLED INTO THE DRIVE. FOLLOW UP INFORfl11~T ION INCLUDING THE: RESULTS OF SUBSEQUENT SCRAM TESTING WILL BE FORWARDED TO YOU IN A TEN DAY REPORT B B STEPHENSON SUPERH!TENDENT DRESDEN NUCLEAR PO\\vER STATION COMMONWEALTH EDISON COMPANY RR 1 MORRIS IL G0~50 LJ 3 N N N N
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