ML17252A807
| ML17252A807 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 03/18/1975 |
| From: | Stephenson B Commonwealth Edison Co |
| To: | O'Leary J NRC/RGN-III |
| References | |
| Download: ML17252A807 (1) | |
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TWX 7108280476 USERDA GTWN SPL084 WAB186Cl607) C2-03.6380E076)PD IC S I P MB N GZ CS P 8159424449*TDBN MORRIS IL 118.03-1'7 0406P EST PMS J F OLEARY,.D.IRECTOR DIRECTORATE OF LICENSING WUX US NUCLEAR REGl,ILATORY WASHINGTON DC 20555
SUBJECT:
D.PR-25_,- DRESDEN NUCLE;AR POWER
~TATION, UNIT 3.
THIS WILL CONFIRM A CONVERSATION' WI TH MR. P JOHNSON OF YO'.UR OFFICE...
AT 1455 HOURS THIS DATE CONCERNING PERIODIC. 25* CONTROL* ROD SCR.AM TESTING IN WHICH IT WAS DETERMINED.THAT SECTION 3.3.C-.l OF THE TECH SPECS COULD NOT BE ~ET FOR AVERAGE OF THE SCRAM iNSERrioN TIMES FOR THE 3 FASTEST RODS OF' ALL GROUPS:.OE 4 'CONTROL RODS IN A 2X2 ARRAY *.
THE RODS CAUSING THE PROBLEM ARE H-8 AND *K-10 CFOR 5-0/0 AND 20-0/0 TRAVEL), J-8CFOR 5-0/0~.20-0/0 AND 50-0/0.TRAVEL) AND*L..:9, L-11 AND J-11 CFOR 5-0/0 TRAVEL)*.*A SECOND.TEST.OF THE ABOVE RODS.DiD NOT DUPLICATE lHE PREVIOUS RESULTS,. °IE; ~ALL DRI'VES WERE SATISFACTORILY I
SCRAM TESTED WITHIN ALLOWABLE' LI MI.TS. ADDITIONAL TES TI NG. IS CONTINUING.TO DETERMINE AND C_ORRECT THE P~qBLEM-.. OF.SLOW* I~IT.IAL SCRAM~ TI MES.
BB STEPHENSO.N, SUPERINTEND.ENT~*.DRESDEN.NUCLEAR POWER STATION, COMONWEALTH.. EDISON COMPANY RR 1 "MORRIS: IL '60150 1
1844 EST
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