ML20084R498
| ML20084R498 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 03/17/1975 |
| From: | Stephenson B COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20084R493 | List: |
| References | |
| NUDOCS 8306150144 | |
| Download: ML20084R498 (1) | |
Text
v cy ce
,1 q
l <
=;---
ss' VEE 212( 1602) (2-03 6075E0 76) PD 05 /17/ 75 1602 ICS IPMBNGZ CSP 8159424449 TDBN MORRIS IL 115 03%{})0402P EST PMS JAMES G KEfELEB REG ION AL DIRECTOR DIRECTORATE OF REGULATORY OPERATIONS REGION 5 US NUCLEAR REGULATORY COMMISSION WUX 799 ROOSEVELT RD v
L 1
,n GLEN ELL YN IL 60137
,o
'l
\\
SUBJECT DPR-25, DRESDEN NUCLEAR POWER ST AT ION, UNIT 5.
THIS WILL CONFIRM A CONVERSATION WITH MR. P JOHNSON OF YOUR OFFICE AT 1455 HOURS THIS DATE CONCERNING PERIODIC 25 CONTROL ROD SCRAM TESTING IN WHICH IT WAS DETERMINED THAT SECTION 3.3.C. ! 0F THE TECH SPECS COULD NOT BE MET FOR AVERAGE OF THE SCRAM INSERTION TIMES FOR THE 3 FASTEST RODS OF ALL GROUPS OF 4 CONTROL RODS IN A 2X2 ARRA Y.
THE RODS CAUSING THE PROBLEM ARE H-8 AND K-10 (FOR 5-0/0 AND 20-0/0 TRA VEL), J-8(FOR 5-0/0, 20-0/0 AND 50-0/0 TRAVEL) A ND L-9, L-Il AND J-il (FOR 5-0/0 TRAVEL). A SECOND TEST OF THE AB0VE RODS DID NOT v m w +
DUPLICATE THE PREVIOUS RESULTS, IE, ALL DRIVES WERE SATISFACTORILY SCRAM TESTED WITHIN ALLOWABLE LIMITS. ADDITIONAL TESTING IS CONTINUING TO DETERMINE AND CORRECT THE PROBLEM OF SLOW INITIAL SCRAM TIMES.
B B STEPHENSON, SUPERINTENDENT, DRESDEN NUCLEAR POWER ST ATION, COMONWEALTH EDISON COMPANY RR I MORRIS IL 60450 NNNN 5[ '
~;
c<
)
9306150144 750327 PDR ADOCK 05000249 5
PDR s
,am,s